Trane XL824 Connected Control

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Document DEVICE REPORT18-HD72D1-11F-EN 02232024

Trane XL824 Connected Control
TCONT824 Installation Guide
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES IMPORTANT -- This Document is customer property and is to remain with this unit. These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should be referred to your installing dealer or local distributor.
18-HD72D1-11F-EN

Installation Guide
Contents
1. Safety....................................................................... 2 2. Product Specifications........................................... 3 3. General Information................................................ 3
3.1 Overview........................................................ 3 3.2 Contents......................................................... 3 3.3 Accessories.................................................... 3 4. Installation............................................................... 4 4.1 Location.......................................................... 4 4.2 Network Connections..................................... 4 4.3 Mounting........................................................ 4 4.4 Wiring............................................................. 5 4.5 Heat/Cool Applications................................... 7 4.6 Heat Pump Applications............................... 13 4.7 Dual Fuel Applications................................. 17 4.8 Field Wiring Connection Diagrams (454B
Applications)................................................. 19 5. System Setup........................................................ 21
5.1 Power-Up Sequence.................................... 21 5.2 Guided Setup Wizards................................. 21 5.3 Smart Optimization....................................... 21 5.4 Installer Setup Screens................................ 22 5.4.1 Group 1 Standard Settings........................... 22 5.4.2 Group 2 Equipment Settings........................ 22 5.4.3 Group 3 Sensor Settings.............................. 22 5.4.4 Group 4 Accessories Settings...................... 23 5.4.5 Group 5 Comfort Settings............................ 24 5.4.6 Group 6 Airflow Settings............................... 25 5.4.7 Group 7 Lockout Settings............................. 26 5.5 Service Reminders....................................... 26 5.6 Dealer Code................................................. 26 5.7 Software Updates......................................... 26 6. Basic Operation.................................................... 27 6.1 PI Control..................................................... 27
1. Safety
NOTE: Use 18-gauge color-coded thermostat cable for proper wiring. Shielded cable is not typically required. Keep this wiring at least one foot away from large inductive loads such as Electronic Air Cleaners, motors, line starters, lighting ballasts and large distribution panels.

6.2 Load Value - Heating.................................... 27 6.3 Load Value - Cooling.................................... 27 6.4 Duty Cycles.................................................. 27 6.5 Overshoot Clamp......................................... 27 6.6 Stage Thresholds......................................... 28 6.7 Stage Inhibits............................................... 28 6.8 Fan Mode..................................................... 28 6.9 Air Cleaner Mode......................................... 28 7. Advanced Operation............................................. 29 7.1 Control Response Rate ............................... 29 7.2 Dehumidification........................................... 29 7.3 Dehumidifier Operation................................ 29 7.4 Dual Fuel Operation..................................... 29 7.5 Lockouts....................................................... 30 7.6 Humidifier Operation.................................... 31 7.7 Recovery...................................................... 31 7.7.1 Aggressive Recovery................................... 31 7.7.2 Heating Aggressive Recovery...................... 31 7.8 Ventilation Operation.................................... 31 7.9 Warm Air Discharge..................................... 31 7.10 Wet Heat (Hydronic) Operation.................... 31 8. Diagnostic Tools.................................................... 32 8.1 Test Modes................................................... 32 8.2 Save Logs.................................................... 32 8.3 Diagnostics................................................... 32 8.4 History.......................................................... 32 8.5 System Report............................................. 33 8.6 Restore Factory Defaults.............................. 33 9. Troubleshooting.................................................... 34 10. Notices................................................................... 35 10.1 FCC Notice................................................... 35 10.2 IC Notice...................................................... 35
Failure to follow these wiring practices may introduce electrical interference (noise) which can cause erratic system operation. All unused thermostat wire to be grounded at indoor unit chassis ground only. Shielded cable may be required if the above wiring guidelines cannot be met. Ground only one end of the shield to the system chassis.

This information is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air conditioning product may result in personal injury and/ or property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
2

LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and troubleshooting of this product, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
18-HD72D1-11F-EN

824 Programmable Wi-Fi Comfort Control
2. Product Specifications
SPECIFICATION DESCRIPTION
Product Model TCONT824AS52DC Product XL 824 Connected Control Size 5-1/2" x 3-3/8" x 1" (WxHxD)
Configurations Heat Pump, Heat/Cool, Dual Fuel, Heat Only, Cooling Only Maximum Number of Stages 5 Stages Heat, 2 Stages Cooling Storage/Operating Temperature -40°F to 175°F, 5% to 95% RH non-condensing
Input Power 24VAC Power Consumption 7VA*
Wire Usage 18 AWG System Modes Auto, Heating, Cooling, Off, Emergency Heat
Fan Modes Auto, On, Circulate Cooling Setpoint Temperature Range 60°F to 99°F, 1°F resolution Heating Setpoint Temperature Range 55°F to 90°F, 1°F resolution
Indoor Temperature Display Range -40°F to 122°F Outdoor Temperature Display Range -40°F to 140°F
Indoor Humidity Display Range 0% to 100%, 1% resolution Minimum Cycle Off Time Delay Compressor: 5 minutes, Indoor Heat: 1 minute

*On every application, 24VAC loads should be reviewed to be sure the indoor unit control power transformer is adequately sized.

3. General Information
3.1 Overview
The 824 Connected Control has a 4.3" color touch screen and offers a full-featured and easy-to-use interface. From individual daily schedules to remote access, the 824 is one of the most advanced 24VAC Controls available.

3.3 Accessories
-- Wired Remote Indoor Sensor (ZZSENSAL0400AA)
-- Wired Remote Outdoor Sensor (BAYSEN01ATEMPA)
-- Bonnet Thermostat model THT1248 (BAYSEN03ATEMPAA)

3.2 Contents
-- 1-Control -- 1-Sub-base -- 2-#6 18X1 Phillips slotted head mounting screws -- 2-#6x1 Nylon Drywall Anchors -- 1-Installation Guide -- 1-Quick Start Guide -- RJ-45 Holder and Screw -- 1-USB "On-the Go" Adapter Cable (Micro USB plug to
Standard USB receptacle)

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Installation Guide

4. Installation
4.1 Location
The 824 is designed for installation in climate controlled living spaces. Place the unit in a central location with good circulation.
For proper temperature sensing, avoid exposing the 824 to heat radiated from lamps, sun light, fireplaces or any other radiant heat source.
Avoid locations close to windows, behind doors or alcoves with poor air circulation, adjoining outside walls, or doors that lead to the outside.
Select a location that prevents the 824 from being directly exposed to air currents from supply registers or ceiling fans.
Mount the Control on a section of interior wall that does not contain hot or cold water pipes or duct work.
Important: The 824 Control utilizes a 4.3" color touch screen. This screen generates heat which is vented out the top of the Control utilizing natural convection. If an air source is directed at or from above, heat from the screen can be trapped within the Control and can cause the indoor temperature to be biased. (Refer to Figure 1 on page 4.)

4.2 Network Connections
To take advantage of the full range of features on the 824 Control, it should be connected to the Internet. This is possible using either a wireless or a wired connection.
Wireless Connections
If the 824 Control will be connected to the Internet using the built-in wireless feature, choose a mounting location that ensures adequate signal strength from the Internet router.
Tips to Help Maximize Signal Strength:
-- Do not mount the Control more than 30 feet from the wireless router
-- There should be no more than three interior walls between the Control and the router.
-- Do not mount the Control in areas where electromagnetic emissions from other devices, appliances or wiring can interfere with the Control's communication. (i.e. wireless phones, security systems, wireless Internet cameras).
-- Do not mount the Control in recessed areas, near metal objects, or near structures. (i.e. doors, appliances, entertainment centers or shelving units).
-- Do not mount the Control closer than 2 inches to any pipes, duct work, or other metal obstructions.

Figure 1. PLACEMENT OF THE 824

Correct Placement

2 FEET

Natural heat dissipation from the Touch Screen

Optimum Zone

Onboard 5 FEET Thermistor

-- Do not have metal obstructions, concrete or brick
InRceoferrwrtoealcltshtebe8tw24eeUnstehreCGCeuioliindngetrFofaolnranadddthiteionroaul tienrf.ormation on Pclaoncneecmtinegnthte 824 to the Internet.
Wired Connections
HeaTt fhroem8th2e4sCcroeenntrmolaymbaeytrbapepceodnnected to the Internet using its extewrinbthauilnitlotth-pie-ndboRowdJny-ao4ifr5ftlhocewoCsnoonnuetrrcocelt,obsyru.acWnh hen using a wired connection,
verify that a CaAsTa c5eiloinrg bfaent.ter Ethernet cable with a male RJ-45 connector is present from the router to the Control.

Incorrect Placement

Ceiling Fan

Heat from the screen may be trapped within the body of the Control by an
external top-down airflow source, such as a ceiling fan.

The onboard thermistor may be biased by this heat causing the displayed indoor temperature to be elevated.

4.3 Mounting
Follow these steps to mount the 824 Control to the wall. 1Th. e oTbnyubrtohnaisrOdhFethaFetrcmaaliulsstpoinorgwmteahyer btdoeisbhpileaasyaeetdding and cooling equipment. 2. iInfdaoonr etexmispteinragtutrheetormbeoesletavat tiesd.being replaced:
a. Remove the existing thermostat from the wall.
b. Record color and terminal marking of each wire.
c. Disconnect the wires from the existing thermostat being careful not to allow them to fall back into the wall.
3. Carefully pry the Sub-base away from the 824 Control using a small flat-blade screwdriver. Note that the tight fit is normal and ensures that the Control is held securely to the Sub-base when mounted on the wall.
4. Route the wires through the opening on the Sub-base.
5. If using a wired Internet connection, route the Ethernet cable through the opening.

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6. Place the Sub-base against the wall in the desired location and mark the wall through the mounting holes. If you are using a wired Internet connection, be sure to mark the cutout for the RJ-45 connector (see Figure 2 on page 5).
7. Drill the holes in the wall where marked.
If you are using a wireless Internet connection, skip to step 9.
8. When using a wired Ethernet connection, follow these step and refer to Figure 3 on page 5.
a. With the Sub-base and RJ-45 holder oriented as shown, press the holder into the Sub-base.
b. Slide the holder to the right so it snaps in place.
c. Secure the holder with the provided screw.
d. Insert the RJ-45 Connector into the RJ-45 holder until it snaps into place.
9. Mount the Sub-base to the wall using included mounting screws and drywall anchors. An optional mounting hole is available for more secure mounting, if needed. Make sure all wires extend through the hole in the Sub-base see Figure 4 on page 5.
4.4 Wiring
1. Adjust the length and position of each wire to reach the proper terminal on the connector block of the Sub-base. Strip 1/4" of insulation from each wire. Do not allow adjacent wires to short together when connected.
2. Match and connect control wires to the proper terminals on the connector block. Refer to Field Wiring Diagrams included in this document.
3. Push excess wire back into the wall and seal the hole to prevent air leaks. NOTE: Air Leaks in the wall
Figure 2. MARK THE MOUNTING HOLES

This side mounts to wall 824 Programmable Wi-Fi Comfort Control
Figure 3. ATTACH RJ-45 HOLDER TO SUB-BASE

RS1 RS1 ODT ODT W3 W2 W1 BK G Y2 Y1 O B/C RH RC AUX2 AUX2 AUX1 AUX1
b

a
Thermostat Wires
c
d
Mounting Holes

Wall

RJ-45 Plug

Optional Mounting Hole

Figure 4. MOUNT THE SUB-BASE TO THE WALL Thermostat Wiring

Wall
Ethernet Wiring

RS1 RS1 ODT ODT W3 W2 W1 BK G Y2 Y1 O B/C RH RC AUX2 AUX2 AUX1 AUX1

Thermostat Wires

RJ-45 Plug

Mounting Holes

Optional Mounting Hole

Thermostat Wiring
behind the Control can cause improper operation.
4. Attach the Control to the Sub-base. 5. Turn ON power to the heating and coolinWgalel quipment.

Ethernet

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Wiring

Installation Guide

Field Wiring Connection Diagrams (410A Applications)
4.5 Heat/Cool Diagrams

PAGE
7 7 8 8 9 9 10 10 11 11 12

DIAGRAM
DIAGRAM 1 DIAGRAM 2 DIAGRAM 3 DIAGRAM 4 DIAGRAM 5 DIAGRAM 6 DIAGRAM 7 DIAGRAM 8 DIAGRAM 9 DIAGRAM 10 DIAGRAM 11

DESCRIPTION
1 STAGE COOLING W/GAM5A MODEL AIR HANDLER 1 STAGE COOLING W/GAM5B MODEL AIR HANDLER 2 STAGE COOLING W/GAM5B MODEL AIR HANDLER 1 STAGE COOLING W/TEM4 AIR HANDLER 1 OR 2 STAGE COOLING W/TEM6 AIR HANDLER 1 STAGE W/COOLING GAS FURNACE 1 OR 2 STAGE COOLING W/VARIABLE SPEED GAS FURNACE 1 OR 2 STAGE COOLING WITH S9V2 FURNACE PACKAGE 1 OR 2 STAGE HEAT/COOL W/VARIABLE SPEED BLOWER PACKAGE 1 STAGE HEAT/COOL W/NON-VARIABLE SPEED BLOWER RUNTRU 1 STAGE COOLING

4.6 Heat Pump Diagrams

PAGE
13 13 14 14 15 15 16 16

DIAGRAM
DIAGRAM 12 DIAGRAM 13 DIAGRAM 14 DIAGRAM 15 DIAGRAM 16 DIAGRAM 17 DIAGRAM 18 DIAGRAM 19

DESCRIPTION
1 STAGE HEAT PUMP W/GAM5A MODEL AIR HANDLER 1 STAGE HEAT PUMP W/GAM5B MODEL AIR HANDLER 2 STAGE HEAT PUMP W/GAM5B MODEL AIR HANDLER 1 STAGE HEAT PUMP W/TEM4 AIR HANDLER 1 OR 2 STAGE HEAT PUMP W/TEM6 VARIABLE SPEED AIR HANDLER PACKAGE 1 OR 2 STAGE HEAT PUMP W/VARIABLE SPEED BLOWER PACKAGE 1 STAGE HEAT PUMP W/NON-VARIABLE SPEED BLOWER RUNTRU 1 STAGE HEAT PUMP

4.7 Dual Fuel Diagrams

PAGE
17 17 18 18

DIAGRAM
DIAGRAM 20 DIAGRAM 21 DIAGRAM 22 DIAGRAM 23

DESCRIPTION
1 OR 2 STAGE HEAT PUMP W/VARIABLE SPEED GAS FURNACE 1 STAGE HEAT PUMP W/NON-VARIABLE SPEED GAS FURNACE 1 OR 2 STAGE HEAT PUMP W/S9V2 FURNACE PACKAGE 1 OR 2 STAGE DUAL FUEL W/VARIABLE SPEED BLOWER

4.8 Field Wiring Connection Diagrams for (454B Applications)

PAGE
19 19 20 20

DIAGRAM
DIAGRAM 24 DIAGRAM 25 DIAGRAM 26 DIAGRAM 27

DESCRIPTION
1 STAGE COOLING OR HEAT PUMP WITH VSPD AIR HANDLER 2 STAGE COOLING OR HEAT PUMP WITH VSPD AIR HANDLER 1 AND 2 STAGE FURNACE, 1 AND 2 STAGE HP 1 OR 2 STAGE COOLING OR HEAT PUMP WITH 5TEM6 AIR HANDLER

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824 Programmable Wi-Fi Comfort Control
4.5 Heat/Cool Applications
2- 1 STAGE COOLING W/GAM5A OR TAM4 MODEL AIR HANDLER
Diagram 1 - 1 Stage Cooling w/GAM5A Model Air Handler

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT

COMMON SOV COOLING

RH B/C
O Y12

FAN

HEATING

ODT

RS1

INDOOR UNIT R

OUTDOOR UNIT

YO1

NOTES: 1. YI and YO connections must be made as shown for
freeze protection and internally mounted condensate overflow circuits to function properly
2. If 3rd party overflow condensate switches are installed, wire between Y1 of the 824 and YI of the air handler

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

D3ia- g1raSmTAG2E-C1OSOtLaIgNeGCWo/oGlAinMg5wB/GMAOMDE5LBAMIRodHeAlNADiLrEHRandler

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT COMMON

AUX2 RC RH B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R

OUTDOOR UNIT

G
W1 W2 W3
Optional Outdoor Sensor* Optional Remote Sensor*

NOTES: 1. Y terminal must be connected at indoor unit for
selected compressor air flow
*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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Installation Guide

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824 COMFORT CONTROL

AUX 1 AUX 2

AUX1 AUX1 AUX2 AUX2

INDOOR UNIT OUTDOOR UNIT

NOTES: 1. Y terminal must be connected at indoor unit for
selected compressor air flow

24VAC HOT

COMMON

B/C

SOV

COOLING

Y1 Y1

FAN

HEATING

ODT

RS1

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

9-1 STAGE COOLING W/TEM4
Diagram 4 - 1 Stage Cooling w/TEM4 Air Handler

824 COMFORT CONTROL

AUX 1

AUX1 AUX1

AUX 2

AUX2

24VAC HOT

COMMON SOV COOLING

B/C O Y1 Y2

FAN

HEATING

ODT

RS1

INDOOR UNIT R
B

OUTDOOR UNIT B

W1 W2

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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824 Programmable Wi-Fi Comfort Control

10-1 OR 2 STAGE COOLING W/TEM6
Diagram 5 - 1 or 2 Stage Cooling w/TEM6 Air Handler

824 COMFORT CONTROL

AUX 1 AUX 2

AUX1 AUX1 AUX2 AUX2

24VAC HOT

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R

OUTDOOR UNIT R2

NOTES:
1. Cut and remove the BK jumper at the indoor unit
2. R & Y2 connections at outdoor are only required for two stage units

Y1 Y2 G BK1

Y1 Y22

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

Diag1r1a-m1 6ST-A1GEStCaOgOeLwIN/CGoWo/liGnAgSGFaUsRFNuArCnEace

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2 24VAC HOT

AUX1 AUX2 AUX2
RC

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R

OUTDOOR UNIT

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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Installation Guide

Diag1r2a-m1 7OR- 12 oSrTA2GSEtaCgOeOCLIoNoGliWng/VwA/RVIaArBiaLbEleSPSEpEeDedGAGSasFUFRuNrnAaCcEe

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2 24VAC HOT

AUX1 AUX2 AUX2
RC

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT OUTDOOR UNIT

B O
Y1/Ylo
Y/Y2 G BK1 W1 W2

B Y/Y1
Y22
Optional Outdoor Sensor* Optional Remote Sensor*

NOTES: 1. Cut and remove the factory installed BK jumper at
the indoor unit IFC Board (some units may require DIP switch settings) 2. R & Y2 connections at outdoor are only required for two stage units
*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

Diagr1a3m-18O-R12oSrT2ASGtEagCeOOCLoIoNlGingw/wSi9thV2S9FVU2RNFAuCrnEace

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT

COMMON

B/C

SOV COOLING

O Y13 Y23

FAN

HEATING

ODT

RS1

INDOOR UNIT R

OUTDOOR UNIT R4

B/C

O
2

Y1/Ylo

Y/Y2

G BK1

NOTES:
1. Cut and remove the BK jumper at the indoor unit
2. Remove the factory Y1-O jumper on the indoor unit for heat pump systems for proper LED readout
3. Y1 and Y2 wiring from the 824 must connect to Y1 and Y2 of the indoor unit IFC for proper air flow and LED read out
4. R connection at outdoor unit is required only for two compressor/two stage units

W1 W2

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

18-HD72D1-11F-EN

824 Programmable Wi-Fi Comfort Control

Diag1r4a-mPA9C-KPAaGcEka1gOeR12oSrT2ASGtEagHeEAHTe/aCtO/COoLowl /wV/AVRaIrAiaBbLlEe SSPpEeEeDd BBLloOwWeErR

824 COMFORT CONTROL

AUX 1 AUX 2 24VAC HOT

AUX1 AUX1 AUX2 AUX2
RC

PACKAGE UNIT R

NOTES: 1. Remove "R" to "BK" jumper and clip all "Y"
connections at the integrated motor control board (ICMC) to enable pulse width control of the variable speed indoor blower. Ensure clipped wires are capped and taped off.

COMMON

B/C

SOV

COOLING

Y/Y1

FAN

BK1

HEATING

W2/X2

ODT

RS1

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

15- PACKAGE 1 STAGE HEAT/COOL W/NON-VARIABLE SPEED BLOWER

Diagram 10 - Package 1 Stage Heat/Cool w/Non-Variable Speed Blower

824 COMFORT CONTROL

AUX 1 AUX 2 24VAC HOT COMMON SOV COOLING FAN HEATING
ODT RS

AUX1 AUX1 AUX2 AUX2
RC RH B/C O Y1 Y2 G BK W1 W2 W3 ODT ODT RS1 RS1

PACKAGE UNIT R
B
Y
G
W1 W2
Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

18-HD72D1-11F-EN

Installation Guide

Diagra1m6-1A1 M- ERRuISnTtrAuR11SStTaAgGeECCoOoOliLnIgNG

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT

RH COMMON 1 B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R
C

NOTES: 1. B/C at the Control is 24v common and must be
connected to C at the Indoor and Outdoor Units
AIR CONDITIONER
C
Y

G W1 W2
Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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824 Programmable Wi-Fi Comfort Control

4.6 18-H1eSaTtAPGuEmHEpAATpPpUlMicPaWtio/GnAsM5A MODEL AIR HANDLER

Diagram 12 - 1 Stage Heat Pump w/GAM5A Model Air Handler
824 COMFORT CONTROL

AUX 1 AUX 2 24VAC HOT COMMON SOV COOLING FAN HEATING
ODT RS

AUX1 AUX1 AUX2 AUX2
RC RH B/C O Y12 Y2 G BK W1 W2 W3 ODT ODT RS1 RS1

INDOOR UNIT R
B O YI 1 YO1

OUTDOOR UNIT R X2 3 B O
Y

NOTES:
1. YI and YO connections must be made as shown for freeze protection and internally mounted condensate overflow circuits to function properly
2. Wire 3rd party condensate overflow switches beteeen Y1 of the 824 and Y of the air handler
3. Do not connect X2 when using this control.

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

19- 1 STAGE HEAT PUMP W/GAM5B MODEL AIR HANDLER
Diagram 13 - 1 Stage Heat Pump w/GAM5B Model Air Handler

824 COMFORT CONTROL

AUX 1 AUX 2

AUX1 AUX1 AUX2 AUX2

24VAC HOT

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R
B Y1

OUTDOOR UNIT R X22 B O Y

NOTES:
1. Y terminal must be connected at indoor unit for selected compressor air flow
2. Do not connect X2 when using this control.

W1 W2 W3

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

18-HD72D1-11F-EN

Installation Guide

Di2a0g-ra2mST1A4G-E2HSEAtaTgPeUHMePatWP/uGmAMp 5wB/GMAOMD5EBL MAIoRdHeAl ANDirLHERandler

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2 24VAC HOT

AUX2 AUX2
RC RH

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R B
Y1 G

OUTDOOR UNIT R X22 B O Y1 Y2

NOTES:
1. Y terminal must be connected at indoor unit for selected compressor air flow
2. Do not connect X2 when using this control.

W1 W2 W3

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

D2ia5g- r1amST1A5GE- H1ESAtTagPeUHMePatWP/uTmEMp 4wM/TOEDME4LAAirIRHHanAdNlDeLrER

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT COMMON

AUX2 RC RH B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R
B

OUTDOOR UNIT R X21 B O Y

NOTES: 1. Do not connect X2 when using this control.

W1 W2 W3

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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824 Programmable Wi-Fi Comfort Control 26- 1 OR 2 STAGE HEAT PUMP W/TEM6 MODEL VARIABLE SPEED AIR HANDLER Diagram 16 - 1 or 2 Stage Heat Pump w/TEM6 Variable Speed Air Handler

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT COMMON

AUX2 R RH
B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R B O
Y1 Y2 G BK1 W1 W2

OUTDOOR UNIT R X22 B O Y1 Y2

NOTES:
1. Remove the factory installed BK jumper at the indoor unit
2. Do not connect X2 whene using this control.
3. Y2 connection at outdoor is only required for two stage units

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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824 COMFORT CONTROL

AUX 1

AUX1

AUX 2 24VAC HOT

AUX2 AUX2
RC RH

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

PACKAGE UNIT R
B O Y/Y1 Y2 G BK1 W1 W2/X2

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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Installation Guide

Di2a8gr-aPmac1k8a-gePa1ckSataggee1HSetaatgPeuHmepatwP/uNmonp-Vwa/Nrioanbl-eVSarpieaebdleBSlpoweeedr Blower

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2 24VAC HOT

AUX1 AUX2 AUX2
RC

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

PACKAGE UNIT R
B O Y1
G
W1 W2/X2

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

D2ia9g-raAmME1R9I-STRAuRn1truST1ASGtEagHeEAHTeaPtUPMuPmp

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT

COMMON 2 B/C

SOV

COOLING

FAN

HEATING

ODT

RS1

INDOOR UNIT R C
G

OUTDOOR UNIT
R D1 C2 B3 Y X24

NOTES:
1. D at the Outdoor Unit must be wired to W1 or W2 for electric heat during defrost
2. B/C at the Control is 24v common and must be connected to C at the Indoor and Outdoor Units
3. O at the Control must be connected to B at the Outdoor Unit for SOV operation - SOV must also be configured to be energized in heating mode in the 824 Installer Settings>Standard
4. Do not connect X2 when using this control.

W1 W2 W3

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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824 Programmable Wi-Fi Comfort Control
4.370 - D1 uOaRl2FSuTeAlGAEpHpElAicTaPtUioMnPsW/VARIABLE SPEED GAS FURNACE Diagram 20 - 1 or 2 Stage Heat Pump w/Variable Speed Gas Furnace

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2
24VAC HOT
COMMON SOV

AUX1 AUX2 AUX2
RC RH B/C O

INDOOR UNIT OUTDOOR UNIT

X2 3

NOTES:
1. Cut and remove the factory installed BK jumper at the indoor unit (some units may require DIP switch settings)
2. For restricted mode operation, a wired ODT sensor must be connected to the 824
3. Connection to X2 is not required for this configuration

COOLING

FAN

HEATING

ODT

2 ODT

Y1/Ylo Y/Y2
G BK1 W1 W2

Y/Y1 Y2

ODT

RS1

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

31 - 1 STAGE HEAT PUMP W/NON-VARIABLE SPEED GAS FURNACE Diagram 21 - 1 Stage Heat Pump w/Non-Variable Speed Gas Furnace

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT COMMON

AUX2 RC RH B/C

SOV

COOLING

FAN

HEATING ODT

BK W1 W2 W3 ODT 1

ODT

RS1

INDOOR UNIT OUTDOOR UNIT

X2 2

W1 W2

NOTES:
1. For restricted mode operation, a wired ODT sensor must be connected to the 82
2. Connection to X2 is not required for this configuration

Optional Outdoor Sensor* Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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Installation Guide

Di3a2gr-a1mO2R22-S1TAorGE2 SHtEaAgTePHUeMatPPwu/mS9pVw2/SFU9VR2NAFCuErnace

824 COMFORT CONTROL

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT

COMMON

B/C

SOV COOLING

O Y13 Y23

FAN

HEATING

ODT

RS1

INDOOR UNIT R
B/C O 2
Y1/Ylo Y/Y2
G BK1

OUTDOOR UNIT R X2 4 B O Y1 Y2

NOTES:
1. Cut and remove the BK jumper at the indoor unit
2. Remove the factory Y1-O jumper on the indoor unit for heat pump systems for proper LED readout
3. Y1 and Y2 wiring from the 824 must connect to Y1 and Y2 of the indoor unit IFC for proper air flow and LED read out
4. Connection to X2 is not required for this configuration

W1 W2

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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AUX 1 AUX 2 24VAC HOT COMMON SOV COOLING FAN HEATING
ODT RS

AUX1 AUX1 AUX2 AUX2
RC RH B/C O Y1 Y2 G BK W1 W2 W3 ODT2 ODT RS1 RS1

OUTDOOR UNIT R
B O Y/Y1 Y2 G BK1 W1 W2/X2

NOTES:
1. Remove "R" to "BK" jumper and clip all "Y" connections at the integrated motor control board (ICMC) to enable pulse width control of the variable speed indoor blower. Ensure clipped wires are capped and taped off.
2. For restricted mode operation, a wired ODT sensor must be connected to the 824.

Optional Outdoor Sensor*
Optional Remote Sensor*

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.

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824 Programmable Wi-Fi Comfort Control
4.8 Field Wiring Connection Diagrams (454B Applications)

Diagram 24 - 1 Stage Cooling or Heat Pump with VSPD Air Handler

824 Comfort Control

AUX 1 AUX 2 24VAC HOT COMMON SOV COOLING FAN HEATING
*Optional Outdoor Sensor *Optional Remote Sensor

AUX1 AUX1 AUX2 AUX2
RC RH B/C O Y1 Y2 G BK W1 W2 W3 ODT ODT RS1 RS1

Note 2 & 3 Note 1

INDOOR UNIT**

Note 7

R
B O Yo
Y1 Y2in Y2out

Note 5 Note 2
Note 4

G BK
Note 6 W1 W2 W3

Note 5

OUTDOOR UNIT 1-Stage
R B O Y1
X2
*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference. ** Refer to the specific equipment installation guide and wiring diagram for connecting accessories and using the App for configurations.

Notes: 1. Separate the BK and R wires when using the BK functionality from the thermostat or a Humidistat. 2. Yin and Yout connections must be made as shown for freeze protection, internally mounted condensate
overflow circuits, and refrigerant detection system circuits to function properly. 3. 3rd party condensate switch should break the Y1 circuit between the thermostat and AH. 4. Y2out connections at outdoor unit only required for two stage units and should be capped off when not in use. 5. R and O are only needed for heat pump operation. 6. X2 connection to OD is not necessary when using select Trane or American Standard thermostats XL824. 7. For single stage outdoor operation, must connect Y1 and Y2in for full airflow.

Diagram 25 - 2 Stage Cooling or Heat Pump with VSPD Air Handler

824 Comfort Control

AUX 1

AUX1

AUX 2

AUX2

24VAC HOT

COMMON

B/C

SOV

COOLING

FAN

HEATING

ODT
*Oponal Outdoor Sensor ODT

RS1
*Oponal Remote Sensor
RS1

Note 2 & 3 Note 1

INDOOR UNIT**

R
B O Yo
Y1 Y2in Y2out

Note 5 Note 5 Note 2
Note 4

G
BK Note 6
W1
W2
W3

OUTDOOR UNIT 2-stage
R B O Y1 Y2 X2
*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference. ** Refer to the specific equipment installation guide and wiring diagram for connecting accessories and using the App for configurations.

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Installation Guide

Diagram 26 - 1 and 2 Stage Furnace, 1 and 2 Stage HP

824 Comfort Control

CASED COIL CONTROLS BOX

Note 8 & 9 Note 6

B/C

To Thermostat

AUX 1 AUX 2 24VAC HOT COMMON SOV COOLING FAN HEATING
*Oponal Outdoor Sensor *Oponal Remote Sensor

AUX1 AUX1 AUX2 AUX2
RC RH B/C O Y1 Y2 G BK W1 W2 W3 ODT ODT RS1 RS1

B/C

To Indoor

BKi

To Outdoor Yo

Note 3 Note 3

*Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high voltage wiring to avoid interference.
** Refer to the specific equipment installation guide and wiring diagram for connecting accessories and using the App for configurations.

FURNACE**
R B/C Y1 G BK

OUTDOOR UNIT

Note 7

B/C Note 8
Y1

Y2 Note 10
X2

Note 2

Note 7 O

Note 3

W2 Note 11

NOTES:
1. For 24V Control, connect factory supplied harness to circuit board at evaporator. Complete all other wiring connections at furnace.
2. For Heat Pump Systems, remove factory Y1->O jumper at furnace.
3. For 2-Stage Systems, connect W2 to W2 and Y2 to Y2. 4. For Link Enabled Systems, omit all 24V wiring and use
"CAN" connections only. 5. Refer to the installer's guide for additional field wiring options.

6. If BK is used, cut or remove the BK jumper at the indoor unit. 7. For Heat Pump Systems, R and O connections are needed. 8. Y1 to Y2 (thermostat to control box) and Yo to Y1 (control box to outdoor) connections must be
made for freeze protection, internally mounted condensate overflow circuits, and refrigerants detection system circuits to function properly. 9. Third party condensate switch should break the Y1 circuit between the thermostat and air handler. 10. X2 connection to OD is not necessary when using select Trane thermostats XL824. 11. For 1-Stage Thermostat/AC with a 2-Stage Furnace, add jumper connection between W1 and W2 to enable full furnace heating capacity.

Diagram 27 - 1 or 2 Stage Cooling or Heat Pump with 5TEM6 Air Handler

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5. System Setup
5.1 Power-Up Sequence
When the 824 Control is connected to the Sub-base, the Control initiates a 90-120 second power-up sequence. During the power-up sequence, the Screen Calibration option is available for five seconds (Screen Calibration is available for five minutes if the screen has never been calibrated and following a Restore Factory Defaults command).
If the screen is not pressed within five minutes, the Control will default to previously stored Screen Calibration settings. The 824 Control is factory calibrated and can be recalibrated at any time by rebooting the Control.
Note: Temperature display may be inaccurate until the 824 Control acclimates to ambient room conditions, which may take up to one hour.
5.2 Guided Setup Wizards
The 824 Control features two Setup Wizards, the Installation Wizard and the User Setup Wizard. The Installation Wizard guides installers through the installation and configuration process, and the User Setup Wizard guides Homeowners through user-configurable settings.
Installation Wizard
The Installation Wizard appears when 1) the 824 Control is powered on for the first time, 2) when the Restore Factory Defaults function is invoked (Home>Menu>Service> Technician Access>Proceed>Restore Factory Defaults), and 3) when it is selected directly (Home>Menu>Service> Technician Access>Proceed>Installation Wizard).
By following the navigational steps and screen prompts, installers are guided through the Time and Date screens, Installer Setup screens (see "5.4 Installer Setup Screens" on page 22 for detailed descriptions of each of the Installer Setup Screens), Reminders screens and the Dealer Code configuration screens. Each of these menus can be individually accessed after completing the Installation Wizard.

824 Programmable Wi-Fi Comfort Control
User Setup Wizard
The User Setup Wizard is accessed navigating to Home>Menu>Settings>User Setup Wizard. By following the navigational steps and screen prompts, homeowners are guided through the Display, Schedules, Guided Schedule, Network, Trane® Home and Weather configuration screens. Each of these menus may also be accessed individually. Refer to the User Guide for detailed information on user settings.
5.3 Smart Optimization
The 824 Control is equipped with Smart Optimization. By executing a series of blower and active call on/off tests, Smart Optimization will customize the 824 Control to each unique environment and increase the accuracy of the sensed indoor temperature and overall system performance.
Smart Optimization is enabled by default and will automatically execute approximately 18 hours after initial power up. Smart Optimization takes 90 minutes to complete and during the process, heating and cooling operations are disabled. The screen will indicate that the 824 Control is in Smart Optimization mode.
To delay Smart Optimization for an additional 18 hours, touch the 824 Control Screen and hold for five seconds.
To disable Smart Optimization altogether, navigate to Home>Smart Optimization and select Disable and press Apply.
To enable Smart Optimization, navigate to Home>Smart Optimization and select Enable and press Apply. Smart Optimization will execute in approximately 18 hours.
To manually trigger Smart Optimization, first disable, then re-enable the feature.

INSTALLATION WIZARD MENU ITEMS
Date and Time Installer Setup Service Reminders Dealer Identification Code
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DESCRIPTION
Set the current date, time and select whether Daylight Savings Time is on or off.
Configure the basic equipment components installed and customize how the control operates. See Sections 5.4.1 through 5.4.7 for detailed information on installer setup options. Various service reminders can be enabled on the 824 control based on the system configured. Reminder options are System, Filter, Ventilation, UV Light and Humidifier. The frequency of each reminder can be selected based on calendar or run time days. The dealer identification code is used to populate the Dealer Contact Information and associate this device with a Diagnostics account. Enter the primary phone number of the dealership to activate this feature. Only controls connected to the Internet will auto-populate the dealer information.
21

Installation Guide

5.4 Installer Setup Screens
From the Installer Setup screens, individual parameters are configured and modified. Use the up and down arrows to scroll through the groups of settings. To change a setting contained in a particular group, press Edit and press Next to navigate to the desired setting. Press Save to save changes or Exit to discard changes.

5.4.1 Group 1 Standard Settings

MENU ITEM

OPTIONS [DEFAULT]

Outdoor Unit Type

None, [Cooling Only], Heat Pump

Outdoor Unit Stages

[Single Stage], Two Stage

Compressor Type

Single Compressor Two Stage, [Two Compressor Two Stage]

Indoor Unit Type

[Gas/Oil], Electric, Hydronic

Indoor Heat Stages

[Single Stage], Two Stage, Three Stage

Indoor Blower Type

Variable, [Non - Variable]

SOV Operation

[with Cooling Call], with Heating Call

DESCRIPTION
Select the type of outdoor unit installed Select the number of outdoor unit stages Select the compressor type for multi-stage outdoor units Select the type of indoor unit installed Select the number of indoor heat stages Select the indoor blower type (Constant Torque motors are considered non-variable speed) Select which mode of operation energizes the switchover valve

5.4.2 Group 2 Equipment Settings

MENU ITEM

OPTIONS [DEFAULT] DESCRIPTION

Compressor Cooling Cycles Per Hour

2 to 6 Cph [3]

1st Stage Compressor Cooling Cycles Per Hour 2 to 6 Cph [3]

Select the number of cycles per hour during cooling operation
Select the number of cycles per hour during 1st stage cooling operation

2nd Stage Compressor Cooling Cycles Per Hour 2 to 6 Cph [3]

Compressor Heating Cycles Per Hour

2 to 6 Cph [3]

Select the number of cycles per hour during 2nd stage cooling operation
Select the minimum runtime (MRT) of stage 1 indoor heat

1st Stage Compressor Heating Cycles Per Hour 2 to 6 Cph [3] 2nd Stage Compressor heating Cycles Per Hour 2 to 6 Cph [5]

Select the minimum runtime (MRT) of stage 2 indoor heat Select the minimum off time (MOT) for indoor heat operation

Indoor Heater Cycles Per Hour 1st Stage Indoor Heat Cycles Per Hour

2 to 6 Cph [5] 2 to 6 Cph [5]

Select the number of cycles per hour during indoor heat operation
Select the number of cycles per hour during 1st stage indoor heat operation

2nd Stage Indoor Heat Cycles Per Hour 3rd Stage Indoor Heat Cycles Per Hour

2 to 6 Cph [5] 2 to 6 Cph [5]

Select the number of cycles per hour during 2nd stage indoor heat operation
Select the number of cycles per hour during 3rd stage indoor heat operation

5.4.3 Group 3 Sensor Settings

MENU ITEM

OPTIONS [DEFAULT]

Select Outdoor Temperature Sensor

[No ODT Sensor], Remote ODT Sensor

Calibrate Outdoor Temperature Sensor -5°F to 5°F

Select Indoor Temperature Sensor

[Onboard IDT Sensor] Remote IDT Sensor

Calibrate Indoor Temperature Sensor -5°F to 5°F

Calibrate Onboard Humidity Sensor

-5% - 5%

DESCRIPTION
Select whether an outdoor temperature sensor has been connected
Calibrate the outdoor temperature sensor Select whether the indoor temperature is being sensed by the 824 Control onboard sensor or wired remote sensor Calibrate the indoor temperature sensor Calibrate the onboard humidity sensor

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824 Programmable Wi-Fi Comfort Control

5.4.4 Group 4 Accessories Settings

MENU ITEM

OPTIONS [DEFAULT] DESCRIPTION

Filtration Type Installed

Air Cleaner, [Media Filter]

Select the filter type installed

Humidifier Installed

[None], Yes

Select whether a humidifier is installed

Humidifier - Select Aux Contact

[Aux1], Aux2

Select which set of Aux contacts is controlling the humidifier

Humidifier Type Humidifier Control
Humidifier Fan Action Airflow During Humidifier Only Mode UV Light Installed

[Powered/Bypass], Steam
[RH Control], Frost Control
[Humidify with active Heat Call], Humidify without active Heat Call 35% to [100%]
[None], Yes

Select what type of humidifier is installed Select how the humidifier will be controlled (Outdoor temperature sensor must be connected and enabled to allow Frost Control to be selectable)
Select when the humidifier is allowed to operate
Select the desired airflow when the humidifier is operating without an active call for heat - requires variable speed blower Select whether a UV Light is installed

Ventilation Installed

[None], Yes

Select whether ventilation is installed

Ventilation - Select Aux Contact

Aux1, [Aux2]

Select which set of Aux contacts is controlling the ventilation system

Minimum Ventilation Runtime Outdoor Temperature Ventilation Override Ventilator Fan Action Ventilation - Minimum Outdoor Temperature

0 - 60 Minutes [5 Minutes]
[Disable], Enable
[Ventilate with Blower]. Ventilate without Blower *-10°F to 50°F [0°]

Select the minimum runtime per hour for ventilation system Select whether an outdoor temperature override is allowed (Outdoor temperature sensor must be connected and enabled to allow this setting to be selected)
Select whether the indoor blower operates on a call for ventilation
Select the minimum outdoor temperature that ventilation is allowed

Ventilation - Maximum Outdoor Temperature 80°F to 110°F [100°F]

Select the maximum outdoor temperature that ventilation is allowed

Accumulate Overridden Runtime Accumulated Period Dehumidifier Installed

[No], Yes
[4 hours -recover based on outdoor conditions], 24 hours - recover based on outdoor conditions, 4 hours - recover to maintain minimum ventilation, 24 hours - recover to maintain minimum ventilation
[None], Yes

Select whether the overridden ventilation runtime will be made up
Select when to recover missed ventilation runtime due to outdoor conditions exceeding the minimum/maximum outdoor temperature setting (The first two options will not meet ASHRAE 62.2 Standard for minimum ventilation requirements)
Select whether a dehumidifier is installed

Dehumidifier - Select Aux Contact Dehumidifier Control Options Run System Fan with Dehumidifier Request

Aux1, [Aux2]
[Stand Alone Operation], With Active Call for Cooling Only
Yes, [No]

Select which set of aux contacts is controlling the ventilation system
Select when the dehumidifier is allowed to operate
Select if the indoor fan should operate with a call for dehumidifier operation

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Installation Guide

5.4.5 Group 5 Comfort Settings

MENU ITEM

OPTIONS [DEFAULT]

Enable Dehumidification

[Enable], Disable

Dehumidification Overcooling Limit - Degrees [0°] to 3°F

Smart Continous Fan Control Response Rate

Enable, [Disable] [Normal], Fast

Aggressive Recovery > 2° Setpoint Change Enable, [Disable]

Heating Aggressive Recovery by Outdoor Temperature
Heating Aggressive Recovery Setting
Warm Air Discharge

Enable, [Disable] 0° to 70°F [40°F] Enable, [Disable]

DESCRIPTION
Select if enhanced dehumidification features are enabled. See section 7.2 Advanced Operation - Dehumidification for additional information.
Select the maximum amount of overcooling allowed when the indoor humidity exceeds the cooling target humidity setpoint. See section 7.2 Advanced Operation - Dehumidification for additional information.
Select to enable or disable Smart Continous Fan
Select the response rate of the control. See section 7.1 Advanced Operation - Control Response Rate for additional information.
Select whether the 10-minute staging inhibit is disabled (heating or cooling mode) with a setpoint change greater than 2°. See section 7.7.1 Advanced Operation - Aggressive Recovery for additional information.
Select whether the 10-minute staging inhibit is disabled during heating mode when the outdoor temperature falls below the selected outdoor temperature (Outdoor temperature sensor must be connected and enabled to allow this setting to be selected)
Select the outdoor temperature for Heating Aggressive Recovery
When enabled the indoor airflow will be limited to 80% on a call for heat pump heating. This only applies to heat pump heating with no call for aux heat (An indoor unit with a variable speed blower is required)

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5.4.6 Group 6 Airflow Settings
MENU ITEM
VS Blower On Delay - Clg Non VS Blower On Delay - Clg
VS Blower Off Delay - Clg
Non VS Blower Off Delay - Clg
VS Blower On Delay - Comp Htg Non VS Blower On Delay - Comp Htg
VS Blower Off Delay - Comp Htg
Non VS Blower Off Delay - Comp Htg Hydronic Heat Blower On Delay Hydronic Heat Blower Off Delay Compressor Low Stage Air Flow% - Comp Clg Compressor Low Stage Air Flow% - Comp Clg Compressor Low Stage Air Flow% - Comp Htg Compressor Low Stage Air Flow% - Comp Htg

OPTIONS [DEFAULT]
[No Delay], Enhanced Mode, 7.5 Minutes @ 80%, 4 Minutes @ 80%, 1 Minute @ 50%, 30 Seconds
[No Delay], 15 Seconds 30 Seconds
[No Delay], 1.5 Minutes @ 100%, 45 Seconds @ 100%, 30 Seconds @ 50%, 1.5 Minutes @ 50%, 3 Minutes @ 50%, 30 Seconds @ 35%
[No Delay], 30 Seconds, 60 Seconds, 90 Seconds
[No Delay], Enhanced Mode, 7.5 Minutes @ 80%, 4 Minutes @ 80%, 1 Minute @ 50%, 30 Seconds
[No Delay], 15 Seconds, 30 Seconds
[No Delay], 1.5 Minutes @ 100%, 45 Seconds @ 100%, 30 Seconds % 50%, 1.5 Minutes @ 50%, 3 Minutes @ 50%, 30 Seconds @ 35%
[No Delay], 30 Seconds, 60 Seconds, 90 Seconds
[No Delay], 30 Seconds, 60 Seconds
[No Delay], 30 Seconds, 60 Seconds, 90 Seconds
35% to 60% [50%]
55% to [80%]
35% to 60% [50%]
55% to [80%]

824 Programmable Wi-Fi Comfort Control
DESCRIPTION
Select the blower on delay for cooling operation Enhanced Mode is a tiered Blower On Delay for variable speed blowers only (1 minute at 50%, 7.5 minutes at 80%, then 100%)
Select the blower on delay for cooling operation
Select the blower off delay for cooling operation
Select the blower off delay for cooling operation
Select the blower on delay for compressor heating operation Enhanced Mode is a tiered Blower On Delay for variable speed blowers only (1 minute at 50%, 7.5 minutes at 80%, then 100%) Select the blower on delay for compressor heating operation
Select the blower off delay for compressor heating operation
Select the blower off delay for compressor heating operation
Select the blower on delay for hydronic heating operation
Select the blower off delay for hydronic heating operation
Select the 1st stage air flow for a two stage/two compressor unit in cooling mode Select the 1st stage air flow for a two stage/ single compressor unit in cooling mode Select the 1st stage air flow for a two stage/two compressor unit in heating mode Select the 1st stage air flow for a two stage/ single compressor unit in heating mode

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Installation Guide

5.4.7 Group 7 Lockout Settings
An Outdoor Temperature Sensor must be enabled for Lockout settings to be selectable.

MENU ITEM

OPTIONS [DEFAULT] DESCRIPTION

Auxiliary Heat Lockout

[Disable], Enable

Auxiliary Heat Lockout Setting

32°F to 70°F Degrees [45°]

Compressor Lockout

[Disable], Enable

Compressor Lockout Setting

5°F to 70°F Degrees [30]

Defrost Heater Balance Point (W1)

[Disable], Enable

Defrost Heater Balance Point (W1) Setting

40°F to [55°F]

Defrost Heater Balance Point (W2)

[Disable], Enable

Defrost Heater Balance Point (W2) Setting

10°F to 50°F [40°F]

Defrost Heater Balance Point (W3)

[Disable], Enable

Defrost Heater Balance Point (W3) Setting

[5°F] to 45°F [25°F]

Compressor Cooling 1st Stage Lockout [Disable], Enable

Compressor Cooling 1st Stage Lockout Setting

80°F to [120°F]

Compressor Heating 1st Stage Lockout [Disable], Enable

Compressor Heating 1st Stage Lockout Setting

0°F to [50°F]

Furnace Heating 1st Stage Lockout

[Disable], Enable

Furnace Heating 1st Stage Lockout Setting

0°F to [50°F]

Enable auxiliary heat lockout (10° minimum separation when enabling auxiliary heat lockout and compressor heat lockout)
Select an outdoor temperature to prevent auxiliary heat above the selected outdoor temperature
Enable compressor heat lockout (10° minimum separation when enabling auxiliary heat lockout and compressor heat lockout)
Select an outdoor temperature to prevent compressor heating below the selected outdoor temperature
Enable defrost heater balance point for W1, W2 and W3 (only applicable when indoor heat is electric or hydronic)
Select an outdoor temperature to disallow 1st, 2nd and 3rd stage of indoor heat during defrost above this temperature
Enable defrost heater balance point for W1 and W2 (only applicable when indoor heat is electric or hydronic)
Select an outdoor temperature to disallow 2nd and 3rd stage of indoor heat during defrost above this temperature
Enable defrost heater balance point for W3 only (only applicable when indoor heat is electric or hydronic)
Select an outdoor temperature to disallow 3rd stage of indoor heat during defrost above this temperature
Enable compressor cooling 1st stage lockout
Select an outdoor temperature to force the system to 2nd stage compressor cooling
Enable compressor heating 1st stage lockout
Select an outdoor temperature to force the system to 2nd stage compressor heating
Enable furnace heating 1st stage lockout
Select an outdoor temperature to force the system to 2nd stage furnace heating

5.5 Service Reminders
Reminders can be enabled to trigger an alert when service is required. The reminder is time-based and can be configured on system run time or calendar days. Reminders can be configured for humidifiers, filters, ventilation systems, UV lights and HVAC system maintenance. The type of reminders available are based on the accessories enabled in the installer settings.
5.6 Dealer Code
When an 824 Control is connected to the Internet, a Dealer Code can be entered to auto-populate the dealer's contact information and logo. The code is the dealer's registered phone number listed on ComfortSite. The Dealer Code is also used to associate this device with a specific dealer on Diagnostics.

5.7 Software Updates
To take full advantage of the features and benefits of the 824, the Control should have the latest software revision installed.
When the 824 is connected to a Trane Home account, software updates will occur automatically and do not require user intervention.
The software may also be manually updated.This procedure requires a computer with an Internet connection, a USB Flash Drive and the included USB connector. From your ComfortSite account, go to Tech Support > Trane Tools > TCONT824 Firmware Upgrade to download the latest software.

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6. Basic Operation

6.1 PI Control
The 824 Control uses proprietary control schemes to provide comfort and energy efficiency. The Control senses indoor temperature and determines capacity needed based on the following parameters:

· Mode of operation

· Proportional Error - distance from setpoint

· Integral Error - Time away from setpoint

72º
Set Point Temperature

2 Seconds

Integral Error
A

Room Temperature

A = Proportional Error B + C + D... = Integral Error

6.2 Load Value - Heating
The 824 Control uses proportional plus integral error to determine the amount of capacity required. The calculated capacity is displayed as load value.LoadValue is a numerical representation of the needed capacity to maintain setpoint. The load value range is dependent on the applied system.

0-100 0-200

Single Stage Heat Pump Only Two State Heat Pump Only

0-200 0-300 0-400

Single Stage Heat Pump + 1 Stage Electric/Wet Heat Single Stage Heat Pump + 2 Stage Electric/Wet Heat Single Stage Heat Pump + 3 Stage Electric/Wet Heat

0-300 0-400 0-500

Two Stage Heat Pump + 1 Stage Electric/Wet Heat Two Stage Heat Pump + 2 Stage Electric/Wet Heat Two Stage Heat Pump + 3 Stage Electric/Wet Heat

0-100 0-200 0-300

Single Stage Indoor Heat Only Two Stage Indoor Heat Only Three Stage Indoor Heat Only

0-175 0-275 0-375

Single Stage Heat Pump + 1 Stage Gas/Oil Heat Single Stage Heat Pump + 2 Stage Gas/Oil Heat Single Stage Heat Pump + 2 Stage Gas/Oil Heat

0-275 0-375 0-475

Two Stage Heat Pump + 1 Stage Gas/Oil Heat Two Stage Heat Pump + 2 Stage Gas/Oil Heat Two Stage Heat Pump + 3 Stage Gas/Oil Heat

824 Programmable Wi-Fi Comfort Control
6.3 Load Value - Cooling
0-100 Single Stage Compressor 0-200 Two-Stage Compressor A Load Value of 50 represents a request of 50% demand for single stage cooling units ("Y") or 50% demand for stage one of multistage cooling units ("Y1"). A Load Value of 150 represents a request of 100% demand for stage one ("Y1") and 50% demand of stage two ("Y2") for multistage cooling units.
6.4 Duty Cycles
Indoor temperature control is achieved by duty cycling the equipment when the load value is less than 100% of the current stage of operation. The duty cycle rate is dependent on the calculated load value. The duty cycle chart below indicates the number of cycles at 50% load (i.e. LV = 50).
6 CPH

2 CPH

1 Hour
As with all PI-based controls the indoor temperature will fluctuate above and below the user selected setpoint to maintain comfort in the space. Adjusting the factory set CPH (Cycles per Hour) can affect how tight the Control operates around the setpoint. The CPH can be adjusted in the Installer Setup>Equipment Settings (2 6 CPH)
· Factory default for compressor operation is 3 CPH
· Factory default for indoor heat is 5 CPH
Effects of changing the cycle rates
Lower CPH results in longer run cycles with less cycling but the indoor temperature may deviate above and below setpoint.
Higher CPH results in tighter indoor temperature control but shorter, more frequent cycles.

6.5 Overshoot Clamp
The 824 Control will enforce an "off cycle" anytime the control overshoots more than 2.5°F. Once the indoor temperature is within 0.75°F of setpoint an "on cycle" is allowed dependent on load value and minimum off times.

Cooling Overshoot Clamping Example

75º

Actual Temperature

74.25º

72.5º OFF Cycle Enforced ON Cycle Allowed

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Installation Guide

6.6 Stage Thresholds
The threshold to allow operation is a Load Value greater than 5 and operation is always terminated with a Load Value less than 1.
Load Value also determines when additional stages of operation are requested. To prevent rapid cycling between stages, a stage threshold is enforced. The stage threshold is dependent on the applied system.
COMPRESSOR STAGING THRESHOLDS
STAGE 2

STAGE 3

STAGE 1

100-110 Y1 to Y2

100-115

HP to W1

100-125

HP to Dual Fuel

LV=200

LV=100

STAGE 5

STAGE 1

LV=400

AUX ELECTRIC HEAT - STAGING THRESHOLDS

STAGE 2

STAGE 3

STAGE 4

100115

Compressor

200215

300315

LV=200 LV=300

LV=100

AUX FOSSIL HEAT - STAGING THRESHOLDS

STAGE 2

STAGE 3

100- Inhibit - Compressor to W1 125

175190

175W2 to W3 190

STAGE 4

STAGE 1

LV=300

LV=200

LV=100

STAGE 4

STAGE 1

AUX WET HEAT - STAGING THRESHOLDS

STAGE 2

STAGE 3

100- Compressor to W1 125

200215

6.7 Stage Inhibits
When the stage threshold is exceeded, a stage inhibit is applied. The stage inhibit calculates the rate of recovery over a 15-minute period and determines if the next stage is required to meet the current demand. If the rate of recovery is great enough, a new 15-minute inhibit is enabled. The Control will not go to the next stage of operation until it determines that the current stage cannot satisfy the current demand. Stage inhibits only apply between compressor stages and compressor heat to indoor heat. Stage inhibits do not apply to indoor heat stages.
Stage inhibits can be disabled in the 824 Control Installer Setup>Comfort Settings.
Stage Inhibits - Compressor Staging

Y1 "ON"

Y2 "ON"

Y1 "ON"

LV = 110

LV = 100

START INHIBIT
15 Minutes
LOAD VALUE (LV)

Stage Inhibits - Compressor to Aux Heat

Y1 "ON"

W1 "ON"

W1 "OFF"

LV = 115

LV = 100

START INHIBIT
15 Minutes
LOAD VALUE (LV)

Stage Inhibits - Duel Fuel

Y1 "ON"

W1 "ON"

LV = 125

Y1 "ON" 45 Second Cool Down
LV = 100

START INHIBIT
15 Minutes
LOAD VALUE (LV)

LV=300

LV=200

LV=100

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System Mode
The 824 has (5) System Modes which can be selected... Heating, Cooling, Off, Emergency Heat and Auto.
· Heating System will only operate in heating mode · Cooling System will only operate in the cooling
mode · Off System will not operate in heating or cooling mode · Emergency Heating System will operate the indoor
heat source only (this is only available when the outdoor unit type is a heat pump) · Auto - The Control will determine which mode of operation based on the following rules: · Heating - Indoor temperature is equal or less than
heating setpoint · Cooling Indoor temperature is equal to or greater
than cooling setpoint or within 1°F of cooling setpoint There is minimum deadband between heating and cooling setpoints of 3°F
6.8 Fan Mode
The 824 has three Fan Modes: · Auto Fan only runs with a call for heating or cooling · On Fan runs continuous · Circ Fan runs a user selected minimum amount of time each hour
6.9 Air Cleaner Mode
The 824 has three Air Cleaner modes: · Auto Air cleaner operates only with a call for fan operation · Quick Air cleaner will operate for 3-hours · Allergy Air cleaner will operate for 24-hours
7. Advanced Operation
7.1 Control Response Rate
Allows the user to select a set of higher proportionalintegral control constants to increase the responsiveness of the Control. Selecting "Fast" will cause the Control to generate load value at a faster rate. Control Response rate can be adjusted in Installer Setup>Comfort Settings.
7.2 Dehumidification
The 824 utilizes the following methods for dehumidification: · Air flow reduction (applies only to variable speed blowers) If BK is connected, the 824 can reduce the system air flow by 30% anytime the indoor RH is higher than the cooling RH target. Air flow reduction is disallowed if the indoor temperature is more than 2°F above the cooling setpoint. Dehumidification is factory enabled in the Installer Setup>Comfort Settings. All "Fan Off" delays are also defeated when dehumidification is enabled and the indoor RH exceeds the cooling RH target.
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824 Programmable Wi-Fi Comfort Control

· Overcooling (applies to variable speed and nonvariable speed blowers) - If overcooling is enabled, the Control will allow a 0.1°F of overcooling for each 1% of RH error. A maximum amount of overcooling can be configured for 1°, 2° or 3°F.

EXAMPLE OF OVERCOOLING WITH MAXIMUM CONFIGURED AT 2°

TARGET ACTUAL HUMIDITY HUMIDITY

PERCENT OF RH ERROR

DEGREES OF OVERSHOOT

40%

45%

0.5° Overshoot

40%

55%

15%

1.5° Overshoot

40%

65%

25%

2.0° Overshoot

40%

70%

30%

2.0° Overshoot

When the system is actively overcooling, Dehumidification will be displayed on the 824 home screen. The maximum amount of overcooling is configured in Installer Setup>Comfort settings.
· Smart Continuous Fan (applies to variable speed and non-variable speed blowers) If enabled, continuous fan operation will be interrupted when indoor RH exceeds desired cooling RH target. A humidity icon will be displayed along with the fan icon to indicate that continuous fan operation has been disabled due to high humidity conditions. Smart Continuous Fan will also interrupt the fan circulate mode when indoor humidity exceeds the desired cooling RH. This feature can be enabled in the Installer Settings>Comfort Settings>Smart Continuous Fan settings.

7.3 Dehumidifier Operation
The 824 has the ability to control a Whole-House Dehumidifier through the normally open dry AUX contacts on the 824 Control Sub-base. Control options are:
· Stand Alone Operation Dehumidifier can operate independent from cooling operation as long as the 824 Control is in Cooling mode or Auto mode and the last call was cooling.
If Stand Alone Operation is selected, the 824 Control allows the user to select whether the indoor fan operates with dehumidifier request.
· With Active Call for Cooling Only Dehumidifier can only operate during an active call for cooling.
All dehumidifier control options are located in the Installer Setup>Accessories Settings.

7.4 Dual Fuel Operation
The 824 can control a dual fuel system without the need of an external dual fuel kit. An Outdoor Temperature Sensor must be installed and enabled for Restricted Modes to be available. The 824 Control options are:
· Non Restricted Mode The Control will determine which mode of heat will operate to maintain comfort based on the calculated system load value. With a load value in compressor heating range the heat pump will operate and if the load value climbs to auxiliary heat
29

Installation Guide

range, the heat pump will cycle off and the auxiliary heat source will cycle on. Once the load value falls below the auxiliary heat range, the auxiliary heat will cycle off, and the heat pump will cycle back on.
· Restricted Mode (compressor heat only) Once enabled an outdoor temperature lockout can be set to disable compressor heating operation. When the outdoor temperature falls below the compressor heat lockout the system will operate on auxiliary heat source only. At any temperature above the compressor heat lockout the system will operate the same as non-restricted mode, heat pump or auxiliary heat would be allowed based on system load value. Once the compressor heat is locked out, the outdoor temperature must rise at least 4° above the compressor heat lockout setting before allowing compressor heat again.
Restrict Compressor Heat Only

70º

65º

Control Determines

60º

Heat Source

55º

50º

45º

Compressor Lockout

40º 35º

Aux Heat Only

30º

Compressor Lockout Set to 50º

· Restricted Mode (compressor and auxiliary heat) Once enabled an outdoor temperature lockout can be set to disable compressor heating below and disallow auxiliary heat operation above. When the outdoor temperature is above the auxiliary heat lockout, only compressor heat is allowed. When the outdoor temperature falls below the compressor heat lockout, only auxiliary heat is allowed. When the outdoor temperature is between the compressor heat lockout and auxiliary heat lockout the system will operate the same as non-restricted mode, heat pump or auxiliary heat is allowed based on system load value. There is a 10° minimum dead band between the compressor heat lockout and auxiliary heat lockout. Once the compressor heat or auxiliary heat is locked out, the outdoor temperature must rise or fall at least 4° above or below the lockout setting before allowing compressor or auxiliary heat again.

Restrict Compressor and Aux Heat

70º

65º

Compressor Only

60º

55º

50º
45º Comp or Aux Heat Allowed

40º

35º

Aux Heat Only

30º

Minimum 10°

Compressor

Deadband

Lockout Set to 40º

Aux Heat Lockout Set to 50º

AN OUTDOOR TEMPERATURE SENSOR MUST BE ENABLED FOR LOCKOUT SETTINGS TO BE AVAILABLE. Lockout options are located in the Installer Setup>Lockout Settings.
7.5 Lockouts
The 824 has the following lockouts. AN OUTDOOR TEMPERATURE SENSOR MUST BE ENABLED FOR LOCKOUT SETTINGS TO BE AVAILABLE. Lockouts can be enabled in Installer Setup>Lockout Settings.
· Auxiliary Heat Lockout Once enabled, select an outdoor temperature which disables auxiliary heat anytime the outdoor temperature is above the selected temperature. Compressor heat will be allowed.
· Compressor Lockout - Once enabled, select an outdoor temperature which disables compressor heat anytime the outdoor temperature is below the selected temperature. Indoor heat will be allowed.
NOTE: If enabling Auxiliary Heat Lockout and Compressor Heat Lockout there is a minimum 10° dead band between the two settings.
· Defrost Heater Balance Point (W1) Once enabled, select an outdoor temperature which disables all electric heat during defrost above the selected temperature.
· Defrost Heater Balance Point (W2) Once enabled, select an outdoor temperature which disables 2nd and 3rd stages of electric heat during defrost above the selected temperature.
· Defrost Heater Balance Point (W3) Once enabled, select an outdoor temperature which disables 3rd stage of electric heat during defrost above the selected temperature.
· Compressor Cooling 1st Stage Lockout Once enabled, select an outdoor temperature which forces 2nd stage cooling operation.

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· Compressor Heating 1st Stage Lockout Once enabled, select an outdoor temperature which forces 2nd stage compressor heating operation.
· Furnace Heating 1st Stage Lockout Once enabled, select an outdoor temperature which forces 2nd stage furnace heating operation.
7.6 Humidifier Operation
The 824 has the ability to control a humidifier through the normally open dry AUX Contacts on the Control Sub-base. Humidification is only enabled while in heating mode of operation. Control options are:
· RH Control Dry contacts are closed anytime the indoor humidity is less than the heating target relative humidity.
· Frost Control The 824 Control references the outdoor temperature and structure integrity to offset the heating target relative humidity. This helps to limit the risk of frost or condensation from forming on interior walls and windows. A scale of 1 to 10 is provided based on the insulation properties and expected leakage of the home (1=Leaky with poor insulation, 10=Very Tight with good insulation). An outdoor temperature sensor must be connected and enabled for frost control to be available. Frost Control Structure Integrity Scale
1 2 3 4 5 6 7 8 9 10 Leaky, Poor Insulation Average Good Insulation, Tight
The 824 Control can be setup to allow humidification anytime in heating mode or only when actively heating. The airflow during Humidifier-only is factory set to 100% but can be adjusted between 35%-100% (this requires a variable speed indoor blower with BK connected). All humidifier control options are located in the Installer Setup>Accessories Settings.
7.7 Recovery
The 824 control utilizes a Stage Inhibit to limit equipment staging. This inhibit can be defeated in the following two manners.
7.7.1 Aggressive Recovery
Disables stage inhibits in heating and cooling mode anytime the setpoint is adjusted more than 2°F
7.7.2 Heating Aggressive Recovery
Disable stage inhibit in heating mode only when the outdoor temperature falls below the selected outdoor temperature

824 Programmable Wi-Fi Comfort Control
7.8 Ventilation Operation
The 824 has the ability to control a Ventilation system through the normally open dry AUX Contacts on the 824 Control Sub-base. The blower is not interlocked on a call for ventilation. The ventilation run time per hour can be adjusted to meet ASHRAE 62.2 standards. A temperature override can be set to prevent ventilation operation when the outdoor temperature exceeds the minimum or maximum outdoor temperature selections. If outdoor temperature overrides are enabled the user can select to accumulate the missed ventilation run time. Options are below:
· Accumulate missed ventilation run time in 4 hour increments and make up when the outdoor temperature is within the min/max settings.
· Accumulate missed ventilation run time in 24 hour increments and make up when the outdoor temperature is within the min/max settings
· Accumulate missed ventilation run time in 4 hour increments and make up at the end of 4 hour period.
· Accumulate missed ventilation run time in 24 hour increments and make up at the end of 24 hour period.
All Ventilation control options are located in the Installer Setup>Accessories Settings.
7.9 Warm Air Discharge
Enabling Warm Air Discharge with BK connected will reduce the variable speed blower air flow by 20% when in compressor heating operation. Warm Air Discharge only applies to compressor heating and is disabled when hydronic, fossil fuel or electric heat (including supplemental heat) modes are activated. Warm Air Discharge can be enabled in Installer Setup>Comfort Settings.
7.10 Wet Heat (Hydronic) Operation
A hot water coil can be applied to either a variable speed or non-variable speed indoor unit. The hot water coil can be the sole source of heat or used as auxiliary heat when applied with a heat pump. When applied with a heat pump, wet heat is considered auxiliary heat and will operate inconjunction with heat pump heat. Switching the system mode to emergency heat would disable the heat pump and cycle the wet heat only.
If applied with a variable speed air handler with BK connected, the blower speed during wet heat only heating will vary based on the system load value. The airflow will range from 35% to 100% depending on the system load value. When applied with a heat pump, the blower speed during heat pump and wet heat operation will be the higher of the two air flows. There are separate blower "On" and "Off" delays for wet heat in the 824 Control.
The 824 Control is designed to operate forced air systems and should not be applied to non-forced air systems (radiant floors, radiators, etc...)
The hydronic heat blower delay options can be accessed by navigating to Installer > Setup > Airflow Settings.

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Installation Guide

8. Diagnostic Tools
8.1 Test Modes
Access Test Modes by navigating to Service Menu>Test Modes. All test modes will terminate automatically after 60 minutes or can be terminated manually at any time.

MODE
Test Blower Test Cool Test Compressor Heat
Test Indoor Heat
Test Compressor and Indoor Heat More

SETTINGS
50%, 100% Stage 1 Stage 2 Stage 1 Stage 2
Stage 1 Stage 2 Stage 3
Stage 1 Indoor Heat Stage 2 Indoor Heat Stage 3 Indoor Heat AUX 1 AUX 2

DESCRIPTION
Energize indoor blower at the selected speed
Energize the selected stage of cooling operation. The indoor blower will also operate at the speed required for the selected stage
Energize the selected stage of compressor heating operation. The indoor blower will also operate at the speed required for the selected stage
Energize the selected stage of indoor heating operation. The blower operation will be dependent on the indoor heat type: Electric - blower energized during test mode but the blower speed is controlled by the indoor unit Fossil - blower is controlled independently by the indoor unit during test mode Hydronic - blower is energized during test mode
Energize all stages of compressor heat and selected stage of indoor electric heat/hydronic heat. The blower is energized and runs at the higher of the compressor heat air flow versus indoor heat air flow
Closes the normally open AUX contacts. The blower is not energized during this test mode

8.2 Save Logs
The 824 Control has the ability to log data on USB Flash Drive. Attach a USB Flash Drive to the included USB connector, plug it into the 824 Control and select Save Logs from the Service Menu.
The amount of data logged will be dependent on the number of days logged and the storage capability of the USB Flash Drive. Access Save Logs by navigating to Service Menu>Save Logs.
8.3 Diagnostics
Within the Diagnostic screen are two items related to alerts:
· Current Alerts Alerts which are currently active
· Alert History Cleared Alerts (last 30 days)
NOTE: Each alert will have a date/timestamp of when the alert was negated. The Date/Time stamp for Current Alerts is when the alert was asserted. For Alert History the date/ timestamp is when the alert was negated.
From both screens the user can select an alert code and get additional information on the alert as well as a list of possible causes, similar to the Interactive Troubleshooting Guide located on ComfortSite/ASDealernet
All alerts are categorized by severity:
· CRITICAL
-- Loss of heating/cooling operation
-- Service call is required
-- Alert messages are displayed on the home screen and when closed, a flashing red icon is used to indicate alert condition.
· MAJOR
-- Reduced functionality - minimum operation is possible
-- Service call is not immediately required

-- Alert messages are not displayed on the home screen but a yellow icon is used to indicate alert condition.
NOTE: Critical and Major alerts can be displayed on the home screen by pressing the alert icon on the shortcut tool bar (top right of home screen).
· MINOR
-- Functionality may be lost but should recover or the information is for diagnostic purposes / performance monitoring
-- Service call is not required
-- Minor alerts are only displayed in the Diagnostic screen
Diagnostics can be accessed by navigating to Service Menu>Diagnostics.

8.4 History
History is accessed by navigating to Service Menu>History
The History screen allows the technician to view cycle count and run time data for each mode and stage of operation. This data provides a snap-shot into system operations.

TODAY LAST 7 DAYS

Y1 COOLING

01/02

Y2 COOLING

Y1 HEATING

Y2 HEATING

DEFROST CYCLES

1 Indicates cycle count 2 Indicates cycle time in minutes

CURRENT MONTH
01/02

LAST MONTH
01/02

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8.5 System Report
The System Report Screen provides technicians with important system operational data in one, concise screen. The data is provided in real-time and updates as the data changes. The System Report Screen displays the following data points:
-- System Status - mode and stage of operation -- Load Value -- Fan Status -- Indoor Temperature -- Indoor Relative Humidity -- Heating and Cooling Setpoints -- Relative Humidity Setpoints -- Dehumidifier Status -- Outdoor Temperature -- Outdoor Relative Humidity (Trane Home connection
required) Currently Energized Terminals are displayed in green at the bottom of the System Report screen.
8.6 Restore Factory Defaults
This feature will delete all saved settings, both user and installer, and restore the 824 to its factory default settings.
This also includes any Wi-Fi and Z-WaveTM device settings.

824 Programmable Wi-Fi Comfort Control

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Installation Guide
9. Troubleshooting

SYMPTOM
Control displays an alert code on the screen.
Display will not come on

POSSIBLE CAUSES
A critical or major alert is present.
Loss of 24VAC between R & B at the Control.

Indoor temperature display is incorrect.

1) Indoor temperature display needs calibration. 2) Heat from touch screen is being trapped within the thermostat body. See section 4.1 for mounting location guidelines.

Indoor humidity display is incorrect. Indoor humidity display needs calibration.

Heating will not come on.

1) System mode is not set to Heat/Auto or setpoint is set too low. 2) Minimum off time delay is being enforced. 3) Heating system may require service.

Cooling will not come on.

1) System mode is not set to Cool/Auto or the setpoint is too high. 2) Minimum off time delay is being enforced. 3) Cooling system may require service.

Heating or Cooling is displayed, but no warm or cool air is coming from the registers.

1) There is a fan delay as the heating or cooling equipment turns on. 2) Equipment is not working properly.

Fan runs all the time

1) Fan mode is set to On, Circulate or Clean mode 2) Field wiring issue 3) There is a failure in the indoor unit

"+" symbol appears on Home Screen beneath Indoor Temperature readout
Fan is set to ON but not running.

Both compressor heat and indoor heat are being called simultaneously
1) Humidity Control is engaged. 2) Field wiring issue 3) Blower motor is not functioning.

Cooling or Heating cycles too fast or too slow (narrow or wide temperature swings).
Heat pump is not turning on; only furnace or electric heat strips are running.
Cannot change system mode to desired setting.
Screen does not respond properly to a button press

1) Check the location of the Control for drafts. 2) Cycles per hour is improperly set.
1) Outdoor temperature is below compressor lockout temperature setting. 2) System mode is set to Emergency Heat. 3) Outdoor Unit may require service. Equipment is not configured properly.
1) Screen is out of calibration. 2) Internal Control fault

ACTION
Navigate to the Diagnostic screen on the 824 Control for a Problem Description and Possible Cause.
1) Check R & B wiring. 2) Check transformer for 24VAC output. 3) Check for broken or shorted thermostat wire.
1) Calibrate temperature sensor from Sensor Settings or use a remote temperature sensor 2) Move Control away from competing air stream or use a remote indoor sensor.
Calibrate humidity sensor from the Sensor Settings.
1) Set mode to heat and raise the setpoint above the room temperature. 2) Wait for 5 minutes and recheck heating equipment. 3) Check/repair system.
1) Set mode to cool and lower the setpoint below the room temperature. 2) Wait for 5 minutes and recheck cooling equipment. 3) Check/repair system.
1) Wait a minute for blower delays and recheck registers. 2) Check/repair system.
1) Check Control settings to see if fan is set to On, Circulate or Clean mode. 2) Check field wiring 3) Check indoor unit for failures (such as tripped heating limit).
No action required, symbol is for informational purposes only
1) If indoor humidity is higher than desired setpoint, the blower will cycle off with the equipment. A humidity icon will be displayed on the Fan Mode button when the blower operation is being inhibited due to high humidity. 2) Check field wiring 3) Check/repair system.
1) Seal air leaks behind Control. Relocate Control or apply remote indoor temperature sensor. 2) Adjust cycle rates in the Advanced Installer Setup.
1) Adjust the compressor lockout temperature setting if desired. 2) Check/repair outdoor temperature sensor or wiring.
Check the standard installer set up screen to ensure equipment is properly configured.
1) Remove Control from sub base and reset. Follow the calibration instructions when the Control reboots. 2) Reset/Cycle power to Control by removing it from the subbase, waiting 10 seconds and replacing.

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10. Notices

824 Programmable Wi-Fi Comfort Control

10.1 FCC Notice
FCC ID: XVR-CONT8247
INFORMATION TO USER
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) This device must accept any interference received, including interference that may cause undesired operation. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter.
This equipment has been tested and found to comply with the limits for Class B Digital Device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures.
· Reorient or relocate the receiving antenna
· Increase the separation between the equipment and receiver
· Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
· Consult the dealer or an experienced radio/TV technician for help
Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

10.2 IC Notice
IC: 6178D-CONT8247
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. The distance between user and device should be no less than 20cm.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. la distance entre l'utilisation et l'appareil ne doit pas être inférieure à 20 cm.

18-HD72D1-11F-EN

Trane - by Trane Technologies (NYSE: TT), a global climate innovator - creates comfortable, energy efficient indoor environments for commercial and residential applications. For more information, please visit trane.com or tranetechnologies.com.

Trane has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

Representative-only illustrations included in this document.

18-HD72D1-11F-EN 23 Feb 2024 Supersedes 18-HD72D1-11E-EN (August 2023)

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