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INSTALLATION MANUAL - AHI Carrier

INSTALLATION MANUAL. FULL DC INVERTER XPOWER SUPER Xi OUTDOOR UNIT. Thank you very much for purchasing our air conditioner. Before using ...

V6I å è£ è¯´æ 书 - AHI Carrier SE Europe

Installation Guide for Carrier models including: FULL DC INVERTER XPOWER SUPER Xi OUTDOOR UNIT

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Document DEVICE REPORTSuper-XI-Installation-Manual-EUpdf
INSTALLATION MANUAL
FULL DC INVERTER XPOWER SUPER Xi OUTDOOR UNIT
Thank you very much for purchasing our air conditioner. Before using your air conditioner , please read this manual carefully and keep it for future reference. Caution: The heating function of an indoor unit is available only when it is connected to a cooling & heating outdoor unit. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision

CONTENTS

PAGE

PRECAUTIONS........................................................................................1 CONSTRUCTION CHECKPOINTS..............................................................2 ACCESSORIES........................................................................................3 OUTDOOR UNIT INSTALLATION..............................................................3 REFRIGERANT PIPE..............................................................................13 ELECTRICAL WIRING............................................................................18 COMMISSIONING...................................................................................27 CUSTMER DETAILS.................................................................................29

1. PRECAUTIONS
This installation manual is used for the outdoor unit. Please refer to the indoor unit installation manual to install indoor units. Please refer to the refrigerant branch pipe installation manual to install the refrigerant branch pipes. To gain full advantage of the unit's functions and to avoid malfunction due to mishandling, we recommend that you read this instruction manual carefully before use.
The precautions described herein are classified as WARNING and CAUTION. They both contain important information regarding safety. Be sure to observe all precautions without fail.
WARNING
Failure to follow these instructions properly may result in personal injury or loss of life.
CAUTION
Failure to observe these instructions properly may result in property damage or personal injury, which may be serious depending on the circumstances.
After reading, keep this manual in convenient place so that you can refer to it whenever necessary. If the equipment is transferred to a new user, be sure also to hand over the manual.
WARNING
This unit should only be installed by a professional air conditioning installation engineer. Incorrect installation can cause electric shock, fire or leakage of water. Contact your dealer for installation.

Follow these installation instructions strictly. Incorrect installation may cause water leaks or electrical fires.
When installing the unit in a small room, keep the refrigerant concentration from exceeding allowable safety limits in case it leaks. Contact the place of purchase for more information. Excessive refrigerant in a closed ambient environment can lead to oxygen deficiency.
Use the attached accessories and specified parts for installation. Otherwise, the unit may fall or leak or cause an electrical fire.
Install in a robust location that can withstand the set's weight. Otherwise, the unit may fall and cause injury.
The appliance must be installed in accordance with national wiring regulations
The appliance must not be installed in laundry areas
Before accessing the terminals, all supply circuits must be disconnected.
The appliance must be positioned so that the plug is accessible.
The enclosure of the appliance must be marked by word or symbols and include the direction of the fluid flow.
For electrical work, follow the local national wiring standards, regulations, and these installation instructions. An independent circuit and single outlet must be used. If the electrical circuit capacity is not enough or a defect in the electrics exists, an electrical fire may result.
Use the specified cable, connect it tightly and clamp it so that no external force can act on the terminal. If connection or fixing is imperfect, the unit may heat up or a fire may occur at the connection point.
The wiring route must be properly arranged so that control board cover is fixed properly. If the control board cover is not fixed perfectly, the unit may heat up at the connection point of the terminal or a fire or electric shock may result.
If the supply cord is damaged, it must be replaced by the manufacturer, a service agent, or a similarly qualified person so as to avoid a hazard.
An all-pole disconnection device with at least 3 mm separation distance between all poles and a residual current device (RCD) with a rating above 10 mA must be incorporated into the fixed wiring according to national regulations.
Carry out the specified installation work after considering strong winds, typhoons, and earthquakes. Improper installation may result in the equipment falling or accidents.
The temperature of the refrigerant circuit will be high, so please keep the interconnection cable away from the copper tube.
The power cord type designation is H07RN-F. Equipment must comply with IEC 61000-3-12.
If the refrigerant leaks during installation, ventilate the area immediately.

1

CAUTION
This A/C is an amenity unit. Do not install it in places containing machines, precise instrument, food, plant, animal, artwork, or any area designated for another use.
Ground the air conditioner. Do not connect the ground wire to gas or water pipes, lightning rods, or a telephone ground wire. Incomplete grounding may result in electric shocks.
Install an earth leakage breaker. Failure to do so may result in electric shocks.
Connect the outdoor unit wires, and then connect the indoor unit wires. Do not connect the air conditioner to the power source until the wiring and piping is completed.
Install the drainage pipe to ensure proper drainage and insulate it to prevent condensation. Improper drain piping may result in water leaks and property damage.
Install the indoor and outdoor units, power supply wiring, and connecting wires at least 1 meter away from televisions or radios to prevent interference or noise. Depending on the radio waves, 1 meter may not be sufficient to eliminate the noise.
The appliance is not intended for use by young children or the elderly without supervision.
Young children should be supervised to ensure that they do not play with the appliance.
Do not install the air conditioner in areas that contain: Petroleum.
Salty air (near the coast). (Except for corrosion-resistant models)
Caustic gas (e.g., sulfide) in the air (near a hot spring). Voltage that vibrates significantly. In buses or cabinets. In kitchens full of vapor from cooking oil Strong electromagnetic waves. Flammable materials or gas. Acid or alkaline liquid that evaporates. Other special conditions.
The insulation of the metal parts of the building and the air conditioner should comply with the National Electric Standard.

2. CONSTRUCTION CHECKPOINTS
Acceptance and Unpacking
After the machine arrives, check whether it is damaged. If the surface or inner side of the machine is damaged, submit a written report to the shipping company.
Check whether the model, specifications, and quantity of the equipment complies with the contract.
After removing the outer packaging, store the operating instructions and count the accessories.
Refrigerant pipe
Check the model and name to avoid installation mistakes.
An additionally purchased refrigerant branch pipes (branch joints and branch pipes) must be used to install the refrigerant pipes.
The refrigerant pipes must be the specified diameter. Nitrogen at a certain pressure must be filled into the refrigerant pipe before welding.
The refrigerant pipes must undergo heat insulation treatment.
After the refrigerant pipe is installed completely, the outdoor unit stop valves cannot be open before performing the airtight test and creating a vacuum. The gas-side and liquid-side pipes must undergo the gastightness test and vacuum drying.
Gastightness test The refrigerant pipes must undergo the gastightness test.
Vacuum drying Use the vacuum pump to create a vacuum drying in the connection pipe at the gas side and liquid side concurrently.
Charging refrigerant
The additional refrigerant charge required depends on the lengths and diameters of the outdoor and indoor liquid pipes
Electrical wiring
For outdoor unit power wire sizing and circuit breaker sizing, refer to "Outdoor units electrical characteristics" table in this manual.
To prevent misoperation of the air conditioner, do not interleave or entwine the power wire with the communication wires of the indoor/outdoor unit.
Power on the indoor unit after performing the gastightness test and vacuum drying.
Trial run
Before operation, remove the six pieces of PE foaming at the rear of the unit that protect the condenser. Be careful not to damage the fin, or the heat exchange performance may be affected.
Perform the trial run only after the outdoor unit has been powered on for over 12 hours.

2

3. ACCESSORIES

Name Outdoor unit installation manual Outdoor unit owner's manual
Erp information Information requirements for heat pumb Screw bag (accessory)
90° elbow
Seal plug

All units
1 1 1 1 1 1 8

Connection pipe

2

Matched resistor

2

Wrench

1

Outline

Function

Table.3-1

For maintenance For connecting pipes Used in pipe flushing
For connecting pipes Enhances communication stability Removing side plate

4. OUTDOOR UNIT INSTALLATION
4.1 Outdoor unit combinations
CAUTION
 When all indoor units in the system are operating simultaneously, the total capacity of the indoor units should be less than or equal to the combined capacity of the outdoor units. Otherwise the cooling / heating effect was affected.
 When all indoor units in the system are not operating simultaneously, the maximum total capacity of the indoor units can 130% of the combined capacity of the outdoor units.
 If the system is used in cold environment (ambient temperature under -10°C) or in a high-heat overload scenario, the total capacity of the indoor units should be less than the combined capacity of the outdoor units.
3

Outdoor unit capacity(HP)
8

Max Qty.of indoor unit Outdoor unit capacity(HP)

13

22

Table.4-1 Max Qty.of indoor unit
36

10

16

24

39

12

20

26

43

14

23

28

46

16

26

30

50

18

29

32

53

20

33

CAUTION
 When all of the indoor units operate simultaneously in the system, the total capacity of the indoor units should less than or equal to the combined capacity of outdoor units. Otherwise overload operating will occur when working in a bad working condition or narrow space.
 When all of the indoor units don't operate simultaneously in the system, it is allowed for maximum total capacity of the indoor units is 130  of the combined capacity of outdoor units.
 If the system is used in cold environment (ambient temperature is under -10 ) or in high heat overloading condition, the total capacity of the indoor units should less than the combined capacity of outdoor units.
4.2 Dimension of outdoor unit
The figure shown below is for reference only and may be slightly different from the actual product.

Unit:mm

8~12 HP

14~18 HP

990

1340

Fig.4-1

Fig.4-2

4

20~22 HP

Connection piping dimensions (unit: mm)

8~12HP

14~22HP

1340
24~32 HP
1730

Fig.4-3

R1 Fig.4-5
24HP

R2 Fig.4-6

R3 26-32HP

Fig.4-7

Fig.4-4
5

R4 Fig.4-8

63 63

Check port (used to measure system pressure, charge refrigerant and vacuumize)
Liquid pipe connection port (A)
Gas pipe connection port (B)
Fig.4-9 Detail R1, R2 ,R3
Check port (used to measure system pressure, charge refrigerant and vacuumize)
Liquid pipe connection port (A)
Gas pipe connection port (B)
Fig.4-10 Detail R4

4.4 Base structures
Outdoor unit base structure design should take account of the following considerations:
A solid base prevents excess vibration and noise. Outdoor unit bases should be constructed on solid ground or on structures of sufficient strength to support the units' weight.
Bases should be at least 200mm high to provide sufficient access for installation of piping.
Either steel or concrete bases may be suitable.
A typical concrete base design is shown in Figure 4-11. A typical concrete specification is 1 part cement, 2 parts sand and 4 parts crushed stone with 10mm steel reinforcing bar. The edges of the base should be chamfered.
To ensure that all contact points are equally secure, bases should be completely level. Base design should ensure that the points on the units' bases designed for weight-bearing support are fully supported. Bolt spacings should be as per Figure 4-12 and Table 4-3.
A drainage ditch should be provided to allow drainage of condensate that may form on the heat exchangers when the units are running in heating mode. The drainage should ensure that condensate is directed away from roadways and footpaths, especially in locations where the climate is such that condensate may freeze.
Outdoor unit

Table.4-2
HP
8-10 12
SIZE
A 12.7 15.9 B 25.4 28.6

14-16
15.9 31.8

18-24
19.1 31.8

Unit: mm

26-28 30-32

22.2 31.8

22.2 38.1

4.3 Unit placement and installation
Placement of outdoor units should take account of the following considerations:
Air conditioners should not be exposed to direct radiation from a high-temperature heat source.
Air conditioners should not be installed in positions where dust or dirt may affect heat exchangers.
Air conditioners should not be installed in locations where exposure to oil or to corrosive or harmful gases, such as acidic or alkaline gases, may occur.
Air conditioners should not be installed in locations where exposure to salinity may occur unless the anti-corrosion treatment for high-salinity areas customization option has been added.
Outdoor units should be installed in well-drained, well-ventilated positions that are as close as possible to the indoor units.

10 Expansion bolt Rubber anti-vibration pads
Solid ground / surface
80mm
Expansion bolt positioning (Unit: mm)

Concrete base h200mm 200mm
Fig.4-11

15×23 U-shaped hole

Fig.4-12

6

Table.4-3
HP SIZE
A B C D

Unit: mm

8,10, 12 14,16,18, 20, 22 24,26,28, 30, 32

740

1090

990

1340

723

723

790

790

1480 1730 723 790

4.5 Installation space requirements
Ensure enough space for maintenance. The units in the same system must be at the same height, refer to Fig.4-13.

(Air-in)

(Air-out )

(Air-out )

If obstacles are around the outdoor unit, they must be 800mm below the top of the outdoor unit. Otherwise, an mechanical exhaust device must be added.
D A
C B

Front view

Side view

(one outdoor unit) (one outdoor unit)

A >45°

B >300 mm

Fig.4-16

If the particular circumstances of an installation require a unit to be placed closer to a wall. Depending on the height of adjacent walls relative to the height of the units, ducting may be required to ensure proper air discharge. In the situation depicted in Figure 4-17, the vertical section of ducting should be at least H-h high. If the outdoor unit needs ducting and the static pressure is more than 20Pa, the units should be customized for the corresponding static pressure.

(Air-in)

(Air-in)

(Air-in)

Fig.4-13

Outdoor units must be spaced such that sufficient air may flow through each unit. Sufficient airflow across heat exchangers is essential for outdoor units to function properly. Figures 4-14 to 4-15 show spacing requirements in different scenarios.

For single row installation

>1m

Front

Front 200-500mm

For multi-row installation

>1m Front

Front

Front

Front

Front

Front 200-500mm

Fig.4-14 Fig.4-15

Fig.4-17

4.6 Outdoor unit ducting
Outdoor unit ducting design should take account of the following:
Before installing outdoor unit ducting, be sure to remove the unit's steel mesh cover, otherwise airflow will be adversely affected.

Each duct should contain no more than one bend.

Vibration isolation should be added to the connection between the unit and the ducting to avoid vibration/noise.

Installing louvers is required as doing for safey, they should be installed at an angle no greater than 15° to the horizontal, to minimize the impact on airflow.

If more than one outdoor units need ducting, each outdoor unit should has independent ducting, it cannot share one ducting for more than one outdoor units.

Ducting for 8-12HP

Option A ­ Transverse ducting

Support

750

C

Radius E

A
Radius

90

B

731

Air outlet louver

7

D D

8 ST3.9 self-threading screws

A A300

B

B250

C C3000

D 731D770

E E=A+731



15°

Remove the steel mesh first

Fig.4-18

Option B ­ Longitudinal ducting
Support C

Radius E

A Radius

90

B

750

Air outlet louver

704

8 × ST3.9

self-threading screws

Remove the steel mesh first

Fig.4-19

A A300 B B250 C C3000
D D750 E E=A+750
 15°

Static pressure Remark

0 Pa 0-20 Pa Above 20 Pa

Factory default
Remove steel mesh and connect to duct < 3m long
Customization option

Ducting for 14-18HP Option A ­ Transverse ducting
800
90

Support C
B 740 

Radius E
A Radius

Air outlet louver

770 8 × ST3.9 self-threading screws

Remove the steel mesh first

A

A300

B

B250

C C3000

D 770D800

E E=A+770

 15°

Fig.4-20

Option B ­ Longitudinal ducting
Support C

Radius E

A Radius

90

B

1290

Air outlet louver

8

8 × ST3.9 self-threading screws
Remove the steel mesh first

Option B ­ Longitudinal ducting
Support C

Radius E

D

A Radius

90

B

1290

Fig.4-21

A A300

B

B250

C C3000

D D1290

E E=A+1290

 15°

Static pressure Remark

0 Pa 0-20 Pa Above 20 Pa

Factory default
Remove steel mesh and connect to duct < 3m long
Customization option

Ducting for 20-22HP Option A ­ Transverse ducting
1290
90

Support C
B

E Radius
A Radius 630



Air outlet louver

Air outlet louver 630

12 × ST3.9 self-threading screws
Remove the steel meshes first

A

A300

B

B250

C C3000

D D1290

E E=A+1290
 15°

Fig.4-23

Static pressure Remark

0 Pa 0-20 Pa Above 20 Pa

Factory default
Remove steel mesh and connect to duct < 3m long
Customization option

12 × ST3.9 self-threading screws

Remove the steel meshes first

A

A300

B

B250

C C3000

D 630D660

E E=A+630
 15°

Fig.4-22

9

Ducting for 24-32HP Transverse ducting only
1653

Support C

90

B

Radius E
A Radius 740



Air outlet louver

14-18HP units fan performance 20

15

10

5

0 12000
20

12200 12400 12600 12800 Air flow (m3/h)
20-22HP units fan performance

13000 13200 Fig.4-26

15

10

12 × ST3.9

self-threading screws

5

Remove the steel meshes first

0 15800
20

16000 16200 16400 16600 16800 Air flow (m3/h)
24-28HP units fan performance

17000 17200 Fig.4-27

15

Fig.4-24

A

A300

B

B250

C C3000

D 740D770

E E=A+740
 15°

Static pressure Remark

0 Pa 0-20 Pa Above 20 Pa

Factory default
Remove steel mesh and connect to duct < 3m long
Customization option

Fan performance
The default external static pressure of outdoor units' air outlets is zero. With the steel mesh cover removed the external static pressure is 20Pa.

8-12HP units fan performance 20
15

10

5

0

23600 23800 24000 24200 24400 24600 24800 25000 25200

Air flow (m3/h)

Fig.4-28

30-32HP units fan performance 20

15

10

5

0 22600 22800 23000 23200 23400 23600 23800 24000 24200
Air flow (m3/h)
Fig.4-29
4.7 Snow shielding
In areas of high snowfall, snow shields should be installed on air inlets and outlets to prevent snow from entering the units. Additionally, the height of the base structures should be increased so as to raise the units further off the ground.

Snow shield for air inlet

Snow shield for air outlet

10

5

0 9800

10000

10200

10400 10600 Air flow (m3/h)

10800

11000 11200 Fig.4-25

Snow shield for air inlet

Fig.4-30

10

4.8 Panel dismantling
1. 8HP-22HP: Dismantle the left and right pillars: Remove the 4 screws from the left and right pillars. (Fig.4-31). Rotate both and then lift them 2 mm (Fig. 4-32) to remove them; 24HP-32HP: Dismantle the left, right, and middle pillars: Remove the 6 screws from the left and right pillars. (Fig. 4-31). (Fig. 4-32) to remove them; 24HP-32HP: Dismantle the left, right, and middle pillars: Remove the 6 screws from the left and right pillars. (Fig. 4-31).
2. Dismantle the upper panel: Remove 4 screws (8HP-22HP) or 6 screws (24HP-32HP) from the upper panel on left and right sides (Fig. 4-31 and Fig.4-32). Then lift the panel 3mm to remove it.
3. Dismantle the lower panel: Remove 4 screws (8HP-22HP) or 6 screws (24HP-32HP) from the lower panel on left and right sides (Fig. 4-31 and Fig.4-32) and then lift the panel 3 mm to remove it.
middle pillar

left pillar

right pillar

left pillar

right pillar

8-22HP

24-32HP

Fig.4-31

(left and right pillar clasp)

(middle pillar clasp)

(lower panel hook)

5~10°

Fig.4-32

11

4.9 Disassembly of electric control box
1. Remove the cover of electric control box: (1) Loosen the two screws (by turning counter-clockwise for 1 to 3 turns) from the cover of the electric control box; (2) lift the cover up for 7 to 8 mm, and then turn it outward for 10 to 20 mm; (3) slide down the cover to remove it.
2. Open and rotate the partition plate in between: (1) Loosen the two screws (by turning counter-clockwise for 1 to 3 turns) from the partition plate in between; (2) lift the partition plate up for 4 to 6 mm, and then turn it outward to open the partition plate; (3) slide the hinge (which can slide up and down along a sliding slot) at the bottom of the partition plate to the uppermost position, to fully rotate the partition plate.

1

2

3

4

9

10

5

6

7

8

Connect to refrigerant radiator

Small rotation angle

Maximum rotation angle

1Main PCB 2Power supply filter board 3Power supply terminals 4Communication terminals block 5Compressor inverter module A 6Compressor inverter module B 7Fan module A 8Fan module B 9Reactor A 10Reactor B

CAUTION
1. Disconnect power from the electric control box before performing installation or maintenance on it! 2. To remove the entire electric control box, firstly discharge the refrigerant from the system, disconnect the pipe connecting the refrigerant radiator at the bottom of the electric control box, and remove all cables connecting the electric control box and the internal components of air conditioner. 3. Product images are for illustrative purposes only and may differ from the actual product due to the model and upgrade.

12

5. REFRIGERANT PIPE

5.1 Length and drop height permitted of the refrigerant piping

Table.5-1

Permitted value

Piping(refer to Fig.5-1)

Total pipe length (Total extended length)

1000m

L1+(L2+L3+L4+L5+L6+L7+L8+L9)×2

(Please refer to the caution 5

of conditions 2)

+a+b+c+d+e+f+g+h+i+j

Maximum piping (L)

Actual length

175m

Equivalent length

200m (Please refer to

caution

1)

L1+L5+L8+L9+j
(Pipe diameter requirements,please refers to table. 5-4 or 5-5)

Pipe(between the farthest indoor unit and first branch joint) length

40/90*m (Please refer to caution 5)

L5+L8+L9+j

Indoor unit-outdoor unit drop height

Outdoor unit up Outdoor unit down

90m 110m

(Please refer to caution 3) (Please refer to caution 4)

Indoor unit to indoor unit drop height

30m

Outdoor unit

Drop height between indoor unit and outdoor unit H90m
Indoor unit to intdoor unit drop height h30m

L1

A

The first branch joint
L5

N1 (56)

N2 (56)

a

b

C

L2

L3 B

D

L4

c

N3

(56)

Indoor unit
d
N4 (56)

Pipe ( between the farthest indoor unit and outdoor unit) equivalent length L200m

Pipe ( between the farthest indoor unit and first branch joint) length L40m

L6 E
L8

N5

e

(56) f

F

L7

G g

L9 H
h

I i
N8

(56)

N6 (28)
N7 (28)

j

N9

(28)

N10

(28)

*1. Level differences cannot be above 90 m unless customization is requested (if the outdoor unit is above the indoor unit).

Fig.5-1

300mm

300mm
Fig.5-2

13

CAUTION

Conditions:
a) Each indoor auxiliary pipe (from each indoor unit to its nearest branch joint) does not exceed 20 m in length (a to j each  20m).

1. The equivalent length of each branch join is 0.5m. 2. The indoor units should be as equal as possible for installing on
both sides of the U-shape branch joint. 3. If the outdoor unit is above and the level difference is greater
than 20m, it is recommended that an oil return bend with dimensions as specified in Figure 5-2 is set every 10m in the gas pipe of the main pipe. 4. If the outdoor unit is below and the level difference is more than 40m, the liquid pipe of the main pipe (L1) should be increased one size. 5. The piping between the farthest indoor unit and first indoor branch joint should not exceed 40m in length unless the following conditions are met, in which case the permitted length is up to 90m.
The piping length and level difference requirements that apply are summarized in Table 5-1 and are fully described as follows (refer to Figure 5-1):
1. Requirement 1: The total length of piping in one refrigerant system should not exceed 1000m. When calculating the total length of piping, the actual length of the indoor main pipes (the piping between the first indoor branch joint and all other indoor branch joints, L2 to L9) should be doubled.
2. Requirement 2: The piping between the farthest indoor unit (N10) and the outdoor unit should not exceed 175m (actual length) and 200m (equivalent length). (The equivalent length of each branch joint is 0.5m.)

b) The difference in length between {the piping from first indoor branch joint (A) to the farthest indoor unit (N10)} and {the piping from the first indoor branch joint (A) to the nearest indoor unit (N1)} does not exceed 40m. That is: (L5+L8+L9 +j ) - ({L2 to L3} + a)  40m.
Measures: a) Increase the diameter of the indoor main pipes (the piping
between the first indoor branch joint and all other indoor branch joints, L2 to L9) as follows, except for indoor main pipes which are already the same size as the main pipe (L1), for which no diameter increases are required.
9.5312.7 12.715.9 15.919.1 19.122.2 22.225.4 25.428.6 28.631.8 31.838.1 38.141.3 41.344.5 44.554.0
4 Requirement 4: The largest level difference between indoor unit and outdoor unit should not exceed 90m (if the outdoor unit is above) or 110m (if the outdoor unit is below). Additionally: (i) If the outdoor unit is above and the level difference is greater than 20m, it is recommended that an oil return bend with dimensions as specified in Figure 5-2 is set every 10m in the gas pipe of the main pipe; and (ii) if the outdoor unit is below and the level difference is more than 40m, the liquid pipe of the main pipe (L1) should be increased one size.
5 Requirement 5: The largest level difference between indoor units should not exceed 30m.

3. Requirement 3: The piping between the farthest indoor unit (N10) and outdoor unit should not exceed 40m in length (L5+L8+L9+j40m) unless the following conditions are met and the following measures are taken, in which case the permitted length is up to 90m:

5.2 Selecting piping diameters

Outdoor Unit
L2 L1 A
L5 L6
E L8

L3 B
L4

a C
D c

N1
(56)
b
N3
(56)

e F
L7
L9 H
h

N5
(56)
f
G g
I i
N8
(56)

N6
(28)
N7
(28)
N9
(28)

N2
(56)
d N4
(56)
j N10
(28)

Fig.5-3

14

5.2.1 Piping name definition

Table.5-2 Piping name definition

Pipe name

Code(refer to Fig.5-1)

Main pipe

L1

Indoor unit main pipe

L2~ L9

Indoor unit aux. pipe

a, b, c, d,...j

Indoor unit branch joint assembly A, B, C, D, E, F, G, H, I,

5.2.2 Main pipe (L1), indoor main pipes (L2 to L9) and indoor branch joint kits selection

Table 5-3 Main pipe (L1), indoor main pipes (L2 to L9)

Capacity of indoor unit A(×100W)
A<168 168A<224

Size of main pipe(mm)

Gas side 15.9

Liquid side

Available branch joint

9.53 BJF-224-CM(i)

19.1

9.53 BJF-224-CM(i)

224A<330

22.2

9.53 BJF-330-CM(i)

330A<470

28.6

12.7 BJF-710-CM(i)

470A<710

28.6

15.9 BJF-710-CM(i)

710A<1040 31.8

19.1 BJF-710-CM(i)

1040A<1540 38.1

19.1 BJF-1344-CM(i)

1540A<1800 41.3

19.1 BJF-E1344-CM(i)

5.2.3 Main pipe (L1) and first indoor branch joint (A) selection
The main pipe (L1) and first indoor branch joint (A) should be sized according to whichever of Tables 5-3 and 5-4 / 5-5 indicates the larger size.

Example: The main pipe L1 with the outdoor units 16HP, provided that the equivalent length of all liquid pipes are 90m, according to the Table.5-5 the main pipe diameter are  31.8/15.9; in according to all indoor unit capacity 448, we could find out main pipe diameter is 28.612.7 base on Table.5-3. Take the large one for the selection, we final confirm the main pipe diameter is 31.8/15.9.

Table.5-4 Main pipe (L1) and first indoor branch joint (A) selection

Model
8HP 10HP 12~14HP 16HP 18~24HP 26-32HP

When the equivalent length of all liquid pipes < 90m, the size of main pipe(mm)

Gas side

Liquid side The 1st branch joint

19.1

9.53

BJF-330-CM(i)

22.2

9.53

BJF-330-CM(i)

25.4

12.7

BJF-330-CM(i)

28.6

12.7

BJF-710-CM(i)

28.6

15.9

BJF-710-CM(i)

31.8

19.1

BJF-710-CM(i)

Table.5-5 Main pipe (L1) and first indoor branch joint (A) selection

Model

When the equivalent length of all liquid pipes  90m, the size of main pipe(mm)

Gas side

Liquid side The 1st branch joint

8HP

22.2

12.7

BJF-330-CM(i)

10HP

25.4

12.7

BJF-330-CM(i)

12~14HP

28.6

15.9

BJF-710-CM(i)

16HP

31.8

15.9

BJF-710-CM(i)

18~24HP

31.8

19.1

BJF-710-CM(i)

26~32HP

38.1

22.2

BJF-1344-CM(i)

5.2.4 Indoor auxiliary pipes selection (a to j)

Table 5-6

Indoor unit capacity
A(×100W)

When branch joint's length  10m

Gas side Liquid side

(mm)

(mm)

When the branch's joint's is length 10 m

Gas side Liquid side

(mm)

(mm)

A45

12.7

6.4

15.9

9.5

A56

15.9

9.5

19.1

12.7

5.3 Refrigerant piping selection example
The example below illustrates the piping selection procedure for the outdoor(16HP) and 10 indoor units. The system's equivalent total liquid piping length is in excess of 90m; the piping between the farthest indoor unit and the first indoor branch joint is less than 40m in length;and each indoor auxiliary pipe (from each indoor unit to its nearest branch joint) is less than 10m in length, refert to Fig. 5-3.
Select indoor auxiliary pipes Refer to Table 5-8 to select indoor auxiliary pipes (a-j)
Select indoor main pipes and indoor branch joints B to I The indoor units (N3 and N4) downstream of indoor branch joint D have total capacity of 5.6 + 5.6= 11.2kW. Refer to Table 5-3. Indoor main pipe L4 is 15.9/9.53. Indoor branch joint D is BJF-224-CM(i).
The indoor units (N1 to N4) downstream of indoor branch joint B have total capacity of 5.6 x 4 = 22.4kW. Refer to Table 5-3. Indoor main pipe L4 is 22.2/9.53. Indoor branch joint B is BJF-330-CM(i).
The other indoor main pipes and indoor branch joints are selected in the same fashion.
Select main pipe and indoor branch joint A The indoor units (N1 to N10) downstream of indoor branch joint A have total capacity of 5.6 x 6 + 2.8 x 4 = 44.8kWThe system's eq-uivalent total piping length is in excess of 90m. The total capacity of the outdoor units is 16HP Refer to Tables 5-3 and 5-5. Main pipe L1 is the larger of 28.6 / 12.7 and 31.8 / 15.9, hence 31.8 / 15.9 Indoor branch joint A is BJF-710-CM(i).

15

5.4 Branch joints installation
Indoor branch joints may be installed either horizontally or vertically. Horizontal branch joints must be installed at an angle to the horizontal not exceeding 10° in order to avoid uneven distribution of refrigerant and possible malfunction. Refer to Figure 5-4.

U-shaped branch joint
A

Directional view Incorrect

Correct
10° 10°

6. Allow time for nitrogen to flow as far as the opening at indoor unit A.
7. Flush the first opening: a) Using suitable material, such as a bag or cloth, press firmly against the opening at indoor unit A.
b) When the pressure becomes too high to block with your hand, suddenly remove your hand allowing gas to rush out.
7) Repeatedly flush in this manner until no further dirt or moisture is emitted from the piping. Use a clean cloth to check for dirt or moisture being emitted. Seal the opening once it has been flushed.
8. Flush the other openings in the same manner, working in sequence from indoor unit A towards the outdoor units. Refer to Figure 5-14.
9. Once flushing is complete, seal all openings to prevent dust and moisture from entering.

Horizontal surface

Fig.5-4

liquid pipe gas pipe

Outdoor unit

5.5 Piping flushing
To remove dust, other particles and moisture, which could cause compressor malfunction if not flushed out before the system is run, the refrigerant piping should be flushed using nitrogen. Pipe flushing should be performed once the piping connections have been completed with the exception of the final connections to the indoor units. That is, flushing should be performed once the outdoor units have been connected but before the indoor units are connected.

Indoor unit A

Indoor unit B

Fig.5-5

CAUTION
Only use nitrogen for flushing. Using carbon dioxide risks leaving condensation in the piping. Oxygen, air, refrigerant, flammable gases and toxic gases must not be used for flushing. Use of such gases may result in fire or explosion.
The liquid and gas sides can be flushed simultaneously; alternatively, one side can be flushed first and then Steps 1 to 8 repeated, for the other side. The flushing procedure is as follows: 1. Cover the inlets and outlets of the indoor units to prevent dirt
getting blown in during pipe flushing. (Pipe flushing should be carried out before connecting the indoor units to the piping system.)
2. Attach a pressure reducing valve to a nitrogen cylinder.
3. Connect the pressure reducing valve outlet to the inlet on the liquid (or gas) side of the outdoor unit.
4. Use blind plugs to block all liquid (gas) side openings, except for the opening at the indoor unit which is furthest from the outdoor units ("Indoor unit A" in Figure 5-13).
5. Start to open the nitrogen cylinder valve and gradually increase the pressure to 0.5MPa.

5.6 Gastightness test
To prevent faults caused by refrigerant leakage, a gastightness test should be performed before system commissioning.
CAUTION
Only dry nitrogen should be used for gastightness testing. Oxygen, air, flammable gases and toxic gases must not be used for gastightness testing. Use of such gases may result in fire or explosion.
Make sure that all the outdoor unit stop valves are firmly closed
The gastightness test procedure is as follows: 1. Once the piping system is complete and the indoor and outdoor
units have been connected, vacuum the piping to -0.1MPa.
2. Charge the indoor piping with nitrogen at 0.3MPa through the needle valves on the liquid and gas stop valves and leave for at least 3 minutes (do not open the liquid or gas stop valves). Observe the pressure gauge to check for large leakages. If there is a large leakage, the pressure gauge will drop quickly.
3. If there are no large leakages, charge the piping with nitrogen at 1.5MPa and leave for at least 3 minutes. Observe the pressure gauge to check for small leakages. If there is a small leakage, the pressure gauge will drop distinctly.

16

4. If there are no small leakages, charge the piping with nitrogen at 4MPa and leave for at least 24 hours to check for micro leakages. Micro leakages are difficult to detect. To check for micro leakages, allow for any change in ambient temperature over the test period by adjusting the reference pressure by 0.01MPa per 1°C of temperature difference. Adjusted reference pressure = Pressure at pressurization + (temperature at observation ­ temperature at pressurization) x 0.01MPa. Compare the observed pressure with the adjusted reference pressure. If they are the same, the piping has passed the gastightness test. If the observed pressure is lower than the adjusted reference pressure, the piping has a micro leakage.
5. If the leakage is detected, refer to following part "Leak detection". Once the leak has been found and fixed, the gastightness test should be repeated.
6. If not continuing straight to vacuum drying once the gastightness test is complete, reduce the system pressure to 0.5-0.8MPa and leave the system pressurized until ready to carry out the vacuum drying procedure
Outdoor unit

Liquid side stop valve Nitrogen

Gas side of stop valve

Gas pipe Liquid pipe

Indoor unit

Fig.5-6 Leak detection
The general methods for identifying the source of a leak are as follows:
1. Audio detection: relatively large leaks are audible. 2. Touch detection: place your hand at joints to feel for escaping gas.
3. Soapy water detection: small leaks can be detected by the formation of bubbles when soapy water is applied to a joint.
5.7 Vacuum drying
Vacuum drying should be performed in order to remove moisture and non-condensable gases from the system. Removing moisture prevents ice formation and oxidization of copper piping or other internal components. The presence of ice particles in the system would cause abnormal operation, whilst particles of oxidized copper can cause compressor damage. The presence of non-condensable gases in the system would lead to pressure fluctuations and poor heat exchange performance.
Vacuum drying also provides additional leak detection (in addition to the gastightness test).

CAUTION
Before performing vacuum drying, make sure that all the outdoor unit stop valves are firmly closed.
Once the vacuum drying is complete and the vacuum pump is stopped, the low pressure in the piping could suck vacuum pump lubricant into the air conditioning system. The same could happen if the vacuum pump stops unexpectedly during the vacuum drying procedure. Mixing of pump lubricant with compressor oil could cause compressor malfunction and a one-way valve should therefore be used to prevent vacuum pump lubricant seeping into the piping system.

During vacuum drying, a vacuum pump is used to lower the pressure in the piping to the extent that any moisture present evaporates. At 5mmHg (755mmHg below typical atmospheric pressure) the boiling point of water is 0°C. Therefore a vacuum pump capable of maintaining a pressure of -756mmHg or lower should be used. Using a vacuum pump with a discharge in excess of 4L/s and a precision level of 0.02mmHg is recommended.The vacuum drying procedure is as follows: 1. Connect the blue (low pressure side) hose of a pressure gauge to
the master unit gas pipe stop valve, the red (high pressure side) hose to the master unit liquid pipe stop valve and the yellow hose to the vacuum pump.
2. Start the vacuum pump and then open the pressure gauge valves to start vacuum the system.
3. After 30 minutes, close the pressure gauge valves.
4. After a further 5 to 10 minutes check the pressure gauge. If the gauge has returned to zero, check for leakages in the refrigerant piping.

5. Re-open the pressure gauge valves and continue vacuum drying for at least 2 hours and until a pressure difference of 0.1Mpa or more has been achieved. Once the pressure difference of at least 0.1Mpa has been achieved, continue vacuum drying for 2 hours.
6. Close the pressure gauge valves and then stop the vacuum pump.
7. After 1 hour, check the pressure gauge. If the pressure in the piping has not increased, the procedure is finished. If the pressure has increased, check for leakages.
8. After vacuum drying, keep the blue and red hoses connected to the pressure gauge and to the master unit stop valves, in preparation for refrigerant charging.

Pressure gauge

Yellow hose

Outdoor unit
  

Vacuum pump

Blue hose

Red hose  Gas pipe stop valve  Liquid pipe stop valve  Service port

Fig.5-7

5.8 Charging refrigerant

CAUTION
Only charge refrigerant after performing a gastightness test and vacuum drying.
Never charge more refrigerant than required as doing so can lead to liquid hammering.
Only use refrigerant R410A - charging with an unsuitable substance may cause explosions or accidents.
Use tools and equipment designed for use with R410A to ensure required pressure resistance and to prevent foreign materials from entering the system.
Refrigerant must be treated in accordance with applicable legislation.

17

Always use protective gloves and protect your eyes when charging refrigerant.
Open refrigerant containers slowly.

Calculating additional refrigerant charge The additional refrigerant charge required depends on the lengths and diameters of the outdoor and indoor liquid pipes. Table 5-7 shows the additional refrigerant charge required per meter of equivalent pipe length for different diameters of pipe. The total additional refrigerant charge is obtained by summing the additional charge requirements for each of the outdoor and indoor liquid pipes, as in the following formula, where T1 to T8 represent the equivalent lengths of the pipes of different diameters. Assume 0.5m for the equivalent pipe length of each branch joint.
Table. 5-7

Liquid side piping (mm)
6.4 9.5 12.7 15.9 19.1 22.2 25.4 28.6

Additional refrigerant charge per meter of equivalent length of piping (kg) 0.022kg 0.057kg 0.110kg 0.170kg 0.260kg 0.360kg 0.520kg 0.680kg

Additional refrigerant charge R (kg) = ([email protected]) × 0.022 + ([email protected]) × 0.057 + ([email protected]) × 0.110 + ([email protected]) × 0.170 + ([email protected]) × 0.260 + ([email protected]) × 0.360 + (T7@ 25.4) × 0.520 + ([email protected]) × 0.680
Leak detection The procedure for adding refrigerant is as follows: 1. Calculate additional refrigerant charge R (kg) .
2. Place a tank of R410A refrigerant on a weighing scale. Turn the tank upside down to ensure refrigerant is charged in a liquid state. (R410A is a blend of two different chemicals compounds. Charging gaseous R410A into the system could mean that the refrigerant charged is not of the correct composition).
3. After vacuum drying, the blue and red pressure gauge hoses should still be connected to the pressure gauge and to the master unit stop valves.
4. Connect the yellow hose from the pressure gauge to the R410A refrigerant tank.
5.Open the valve where the yellow hose meets the pressure gauge, and open the refrigerant tank slightly to let the refrigerant eliminate the air. Caution: open the tank slowly to avoid freezing your hand.
6. Avoid freezing your hand.
7. Open the three valves on the pressure gauge to begin charging refrigerant.
8.When the amount charged reaches R (kg), close the three valves. If the amount charged has not reached R (kg) but no additional refrigerant can be charged, close the three valves on the pressure gauge,open all stop values, and run the outdoor units in cooling mode, and then open the yellow and blue valves. Continue charging until the full R (kg) of refrigerant has been charged, then close the yellow and blue valves.
Note: Before running the system, be sure to complete all the pre-commissioning checks and be sure to open all stop valves as running the system with the stop valves closed would damage the compressor.

Pressure gauge

Yellow hose

Master unit 
 

R410A refrigerant tank

Weighing scale

Blue hose Red hose

 Gas pipe stop valve  Liquid pipe stop valve
 Service port

Fig.5-8
6. ELECTRICAL WIRING

6.1 General

CAUTION

All installation and wiring must be carried out by competent and suitably qualified, certified and accredited professionals and in accordance with all applicable legislation.
Electrical systems should be grounded in accordance with all applicable legislation.
Overcurrent circuit breakers and residual-current circuit breakers (ground fault circuit interrupters) should be used in accordance with all applicable legislation.
Wiring patterns shown in this manual are general connection guides only and are not intended for, or to include all details for, any specific installation.
The refrigerant piping, power wiring and communication wiring are typically run in parallel. However the communication wiring should not be bound together with the refrigerant piping or power wiring. To prevent signal interference, the power wiring and communication wiring should not be run in the same conduit. If the power supply is less than 10 A, a not be run in the same conduit. If the power supply is less than 10 A, a wiring conduits should be maintained; if the power supply is in the range 10 A to 50 A then a separation of at least 500 mm should be maintained.

This equipment complies with:
EN/IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equal to the minimum Ssc value where the user's supply and public system interface.

EN/IEC 61000-3-12 = European/International Technical Standard sets the limits for harmonic currents produced by equipment connected to public low-voltage systems with input current > 16A and  75A per phase.
The installer or user of the equipment must ensure, by consulting with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc greater than or equal to the minimum Ssc value.
European/International Technical Standard setting the limits for voltage changes, voltage fluctuations and flicker in public lowvoltage supply systems for equipment with a rated current of  75A.
The European/International Technical Standard sets the limits for harmonic currents produced by equipment connected to public low-voltage systems with an input current of > 16A and  75A per phase.

18

Table. 6-1
8HP 10HP 12HP 14HP 16HP 18HP

Minimum Ssc value(KVA)
5207
5447 5687 5863 6023 6183

NOTE
Select a power cord for these models separately according to relevant standard.
The wiring diameter and the length in the table indicate the condition that the voltage drop range is within 2%. If the length exceeds the above figure, please select the wire diameter according to the relevant standard.
6.2 Power supply wiring
Power supply wiring design and installation should adhere to the following requirements:
Separate power supplies should be provided for the indoor units and outdoor units.
All the indoor units in a system (i.e. all the indoor units connected to the same set of outdoor units) should be tied into the same power circuit with the same power supply, overcurrent and residual current protection (leakage protection) and manual switch, as shown in Figure 6-1. Do not install separate protectors or manual switches for each indoor unit. Powering on and shutting down all indoor units in a system should be done simultaneously. The reason for this is that if an indoor unit that is running were to suddenly power off whilst the other indoor units continued running, the evaporator of the powered-off unit would freeze since refrigerant would continue flowing to that unit (its expansion valve would still be open) but its fan would have stopped. The indoor units that remain running would not get sufficient refrigerant so their performance remain running would not get sufficient refrigerant so their performance would suffer. Additionally, liquid refrigerant returning directly to the compressor from the powered-off unit would cause liquid hammering, potentially damaging the compressor.
For outdoor unit power wire sizing and circuit breaker sizing, refer to Table 6-2 "Electrical Characteristics".
Outdoor unit power supply wiring

CAUTION
All the indoor units in a system should be tied into the same power circuit with the same power supply. Power wiring and communication wiring should not be run in the same conduit. If the power supply is less than 10A, a separation of at least 300mm between power wiring and communication wiring conduits should be maintained; if the power supply is in the range 10A to 50A then a separation of at least 500mm should be maintained. Make sure to set address to each outdoor unit for the combination outdoor units.
6.2.1 Outdoor unit 3-phase power supply terminals wiring connection
To 380-415V 3N~ 50HZ
ABCN
A BC N

Outdoor unit power supply

Leakage protector

Manual switch

Indoor unit power supply wiring Indoor power supply

Leakage protector

Manual switch

Branch box

Fig.6-1

ABCN A BC N

1

2

3

4

5

6

7

8

Indoor unit

9

10

11

12

13

14

15

16

Fig.6-2

Fig.6-3

19

6.2.2 Power supply cable clips installation
CAUTION
First, connect the power wires and the terminals, and then groove the wires or it's hard to install. When installing the main power wire, strip the appropriate length of the insulation layer according to the grooving method and position of the cable clip. When installing the three fixed screws, the twisting length should ensure displacement is less than 2 mm when applying 100 N force onto the wires. Twisting to the end too hard may damage the power wire protective cover.
The attached cable clip includes 2 parts: the base part and the upper cover part. The base has been installed in the electric control box, located under the terminals. The upper cover is put together with the other accessories as an attachment. Both the front and back side of the cable clip can be used to groove the wire. Choose the appropriate way to groove the wire according to different sizes of power wire. The upper cover of the cable clip must be fixed with three M4*30mm screws. When the cross-section area of the power wire is less than 10 mm2, groove the power wires as a whole. When stripping the outermost insulation layer, ensure the sum of the stripped length and terminal length are less than 70 mm. Shown as figure 6-4:
Fig.6-4 When the cross-section area of the power wire is more than 10 mm2, groove the power wires separately. When stripping the outermost, ensure the sum of stripped length and terminal length is between 100 mm and 200 mm, as shown in figure 6-5:
Fig.6-5
20

Safety device requirements
1. Select the wire diameters( minimum value) individually for each unit based on the table 4.11 and table 4.12 where the rated current in table 4.11 means MCA in table 4.12. In case the MCA exceeds 63A, the wire diameters should be selected according to the national wiring regulation.
2. Maximum allowable voltage range variation between phases is 2%.
3. Select circuit breaker that having a contact separation in all poles not less than 3 mm providing full disconnection where MFA is used to select the current circuit breakers and residual current operation breakers:

Table 6.2
Rated current of appliance A
3 >3 and 6 >6 and 10 >10 and 16 >16 and 25 >25 and 32 >32 and 50 >50 and 63

Nominal cross-sectional area (mm2)

Flexible cords 0.5 and 0.75 0.75 and 1 1 and 1.5 1.5 and 2.5 2.5 and 4 4 and 6 6 and 10 10 and 16

Cable for fixed wiring 1 and 2.5

1

and 2.5

1

and 2.5

1.5 and

4

2.5 and

6

4

and 10

6

and 16

10 and 25

Table 6.2.1

System

Outdoor Unit

Voltage Hz Min.

(V)

(V)

Max. (V)

Power Current

MCA TOCA MFA

(A)

(A)

(A)

1

8HP

380-415 50 342 440

24

30.9 32

Compressor

MSC (A)

RLA (A)

-

10

OFM

KW

FLA

(A)

0.56

6.3

1

10HP

380-415 50 342 440 25.2 30.9 32

-

10.6

0.56

6.3

1

12HP

380-415 50 342 440 26.4 31.5 32

-

15.4

0.56

6.9

1

14HP

380-415 50 342 440 33.1 40.3 40

-

25.8

0.92

7.3

1

16HP

380-415 50 342 440 33.1 40.3 40

-

25.8

0.92

7.3

2

18HP

380-415 50 342 440 40.8 59.3 50

-

14+13

0.56+0.56

10.1

2

20HP

380-415 50 342 440 43.9 60.1 50

-

17+16

0.56+0.56

10.9

2

22HP

380-415 50 342 440 47.9 60.1 63

-

19+18

0.56+0.56

10.9

2

24HP

380-415 50 342 440 48.4 62.3

63

-

17.4+16.6 0.92+0.92

13.1

2

26HP

380-415 50 342 440 52.9 62.3 63

-

20+19.8 0.92+0.92

13.1

28HP

380-415 50 342 440

58.7 64.1

63

-

22+21.8 0.92+0.92

14.9

3

30HP

380-415 50 342 440 64.9 72.5

80

-

20+30

0.92+0.92

14.9

32HP

380-415 50 342 440 66.9 72.5

80

-

22+30

0.92+0.92

14.9

Information
Phase and frequency of power supply system: 3N~50 Hz Voltage: 380-415 V

21

6.3 Communication wiring
Communication wiring design and installation should adhere to the following requirements:
0.75mm2 three-core shielded cable should be used for communication wiring. Using other types of cable can lead to interference and malfunction. Indoor communication wiring:
The P Q E communication wires should be connected one unit after another in a daisy chain from the outdoor unit to the final indoor unit as shown in Figure 6-6. At the final indoor unit, a 120  resistor should be connected between the P and Q terminals. After the final indoor unit, the communication wiring should NOT be continued back to the outdoor unit ­ that is, do not attempt to form a closed loop.
The P and Q communication wires and should NOT be grounded.
The shielding nets of the communication wires should be connected together and grounded. Grounding can be achieved by connecting to the metal casing adjacent to the P Q E terminals of the outdoor unit electrical control box.

Outdoor unit

P Q E

P Q E P Q E

Master outdoor unit communication terminals

Fig.6-6

K1 K2 E O A E X Y E P Q E H1 H2 E

Communication wiring configurations ­ correct and incorrect examples

Outdoor unit

Fig.6-7

Table. 6-3 communication cnnections

P Q E

P Q E

P Q E

P Q E

Terminals

Connection

Connect to outdoor unit centralized monitor K1 K2 E (Suitable for some models)

O A E Connect to digital energy meter

X Y E Connect to indoor unit centralized controller

P Q E Connect between indoor units and master outdoor unit

H1 H2 E Connect between outdoor units

Outdoor unit

P Q E

P Q E

P Q E

22

6.4 Wiring example
Power(380-415V 3N~ 50HZ)
L1 L2 L3 N
L1 L2 L3 N

Outdoor unit

ABCN

H1 H2 E P Q E

Indoor unit

Signal wire between indoor/outdoor units Indoor unit

Indoor unit

LN

PQ E A BCDE

LN

PQ E ABCDE

LN

PQ E ABCDE

Branch Box
Signal wire between indoor units

Branch Box
ABCDE Wire controller

Branch Box Signal wire between indoor unit and wire controller

ABCDE Wire controller

ABCDE Wire controller
Fig.6-8

6.5 Outdoor unit field settings

DSP1

DSP2

SW5

SW4

SW3

SW6

6.5.2 Dial switch settings

Dial code definitions:

able 6-4

000 Standard static pressure (default)

001 Low static pressure mode (reserved)

ON
S4

010 Medium static pressure mode (reserved)

1 2 3 011 High static pressure mode (reserved)

100 Super high static pressure mode (reserved)

000 Auto priority (default)

001 Cooling priority

ON

010 VIP priority or voting priority

S5

1 2 3 011 Heating only

100 Cooling only

111 Set priority mode via centralized controller

ON
S6-1
123
ON
S6-2
123
ON
S6-3
123
ON
S8-1
123
ON
S8-2
123
S8-3 ON
123
S7 ON
1

0 Reserved
0 No action (default) 1 Clear indoor unit addresses 0 Auto addressing (default) 1 Manual addressing
0 Reserved
0 Start-up time is 12 minutes (default) 1 Start-up time is 7 minutes 0 Reserved
0 Reserved

MENU

DOWN

UP

OK

Fig.6-9

6.5.1 Button switch function
1) MENU Long press 5 seconds to enter menu function mode, short press return to the previous menu
2) OK Short press to enter the next level menu or confirm the selection
3) UP/DOWN a) Select different menus in menu function mode. b) System check when it is not menu function mode.

Note
 Operate the switches and push buttons with an insulated stick (such as a closed ball-point pen) to avoid touching of live parts.

23

Table 6-5

ENC1 ENC2 ENC4

ON 123

ENC3 ON

&S12

123

ON 123

ON 123

ENC5

Outdoor unit address setting, Only 0, 1,

0-2

2 should be selected(default is 0) 0 is for master unit; 1, 2 are for slave

units.

Outdoor unit capacity setting, Only 0 to 0-C C should be selected 0 to C are for 8HP
to 32HP.

Outdoor unit network address setting,

0-7

Only 0 to 7 should be selected (default is 0).

0-F

The number of indoor units is in the range 0-15

000

0-9 on ENC3 indicate 0-9 indoor units; A-F on ENC3 indicate 10-15 indoor units

0-F The number of indoor units is in the range 16-31

001

0-9 on ENC3 indicate 16-25 indoor units; A-F on ENC3 indicate 26-31 indoor units

0-F

The number of indoor units is in the range 32-47

010

0-9 on ENC3 indicate 32-41 indoor units; A-F on ENC3 indicate 42-47 indoor units

0-F The number of indoor units is in the range 48-63

011

0-9 on ENC3 indicate 48-57 indoor units; A-F on ENC3 indicate 58-63 indoor units

0 Night silent time is 6h/10h (default) 1 Night silent time is 6h/12h 2 Night silent time is 8h/10h 3 Night silent time is 8h/12h 4 No silent mode 5 Silent mode 1(only limit max. fan speed) 6 Silent mode 2(only limit max. fan speed)

7 Silent mode 3(only limit max. fan speed)

8

Super silent mode 1(limit max. fan speed and compressor frequency)

9

Super silent mode 2(limit max. fan speed and compressor frequency)

A

Super silent mode 3(limit max. fan speed and compressor frequency)

Super silent mode 4(limit max. fan speed B and compressor frequency)

F Set silent mode via centralized controller

Note:

means 0 , means 1 .

24

6.5.3 System check table
Press UP/DOWN button to enter system check mode when it is not in menu function mode.

DSP1 content

Parameters displayed on DSP2

0

Unit address

1

Unit capacity

2

Number of outdoor units

3

Number of indoor units as set on PCB

4

Total capacity of outdoor unit

5

Total capacity requirement of indoor units

6

Total capacity requirement correction of master unit

7

Operating mode

8

Outdoor unit actual operating capacity

9

Fan A speed index

10

Fan B speed index

11

T2/T2B average Temp (°C)

12

Main heat exchanger pipe(T3) temperature (°C)

13

Outdoor ambient(T4) temperature (°C)

14

Plate heat exchanger cooling refrigerant inlet (T6A) temperature (°C)

15

Plate heat exchanger cooling refrigerant outlet (T6B) temperature (°C)

16

Discharge Temp. of compressor A (°C)

17

Discharge Temp. of compressor B (°C)

18

Inverter-module heatsink Temp. A (°C)

19

Inverter-module heatsink Temp. B (°C)

20

Plate exchanger degree of superheat (°C)

21

Discharge superheat degree

22

Inverter compressor A current (A)

23

Inverter compressor B current (A)

24

EXVA position

25

EXVB position

26

EXVC position

27

Compressor discharge pressure (MPa)

28

Reserved

29

Number of indoor units currently in communication with master unit

30

Number of indoor units currently operating

31

Priority mode

32

Silent mode

33

Static pressure mode

34

Reserved

35

Reserved

36

DC bus voltage A

37

DC bus voltage B

38

Reserved

39

Address of VIP indoor unit

40

Reserved

41

Reserved

42

Refrigerant state

43

Reserved

44

Power mode

45

Most recent error or protection code

--

--

Table 6-6 Remarks
0-2 8-32HP
3
4 4 5 6
Reserved
7 8 9 10 10
11 12
Check end

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1 Available for master unit 2 Only available for master unit, displayed on slave units has no
sense; 3 Operation mode: 0-OFF; 2-Cooling; 3-Heating;4-Forced cooling 4 Opening angle of EEV: Actual value=Display value*4(480P) or
Actual value=Display value*24(3000P) 5 Opening angle of EEV: Actual value=Display value*4(480P) 6 High pressure: Actual value=Display value*0.1MPa 7 Priority mode: 0-Auto priority, 1-cooling priority, 2-VIP priority or
voting priority, 3-Heating only, 4-Cooling only 8 Silent mode: 0-Night silent time is 6h/8h, 1-Night silent time is
6h/12h, 2-Night silent time is 8h/10h, 3-Night silent time is 8h/12h, 7-Silent mode 3,8-Super silent mode 1, 9-Super silent mode 2, 10-Super silent mode 3, 11-Super silent mode 4; 9 Static pressure mode: 0-Standard static pressure, 1-Low Static pressure, 2-Medium static pressure, 3-High static pressure, 4-Super high static pressure; 10 DC bus voltage: Actual value=Display value*10 V 11 Refrigerant quantity: 0-Normal, 1-Slightly excessive, 2-Significantly excessive, 11-Slightly insufficient, 12-Significantly insufficient, 13-Critically insufficient. 12 0-100% capacity output, 1-90% capacity output, 2-80% capacity output, 3-70% capacity output, 4- 60% capacity output, 5-50% capacity output, 6- 40% capacity output. 10-Auto power save mode, 100% capacity output. 11-Auto power save mode, 90% capacity output, 12-Auto power save mode, 80% capacity output, 13-Auto power save mode, 70% capacity output, 14-Auto power save mode, 60% capacity output, 15-Auto power save mode, 50% capacity output, 16-Auto power save mode, 40% capacity output.
6.5.4 Menu function mode
Only master unit has the full menu functions, slaves units only have error codes check and cleaning menu functions.
1. Long press "MENU" button 5 seconds, then display "n1", and enter the menu function mode. a) Use "UP" and "DOWN" to select a different level 1 menu (for example,n3) b) Press "OK" to enter a level 2 menu (for example,n31)
2. At level 2 menu status a) Use "UP" and "DOWN" to select different level 2 menu (for example,n32) b) Use "OK" to confirm the specified level 2 menu

Table 6-7

MENU

Description

Note

n14 Debug mode 1

1

n15 Debug mode 2

2

n16 Maintenance mode

3

n24 Reserved

n25 Reserved

n26 Backup run

4

n27 Vacuum mode

Display"R006"

n31 History codes

n32 Cleaning history error n33 Reserved

n34 Restore factory settings

5

n41 Power limitation mode 1

6

n42 Power limitation mode 2

7

n43 Power limitation mode 3

8

n44 Power limitation mode 4

9

n45 Power limitation mode 5

10

n46 Power limitation mode 6

11

n47 Power limitation mode 7

12

nb1 Fahrenheit degree (°F) nb2 Celsius degree (°C)

Only available for master unit Only available for master unit

nb3 Exit auto power save mode Only available for master unit

nb4 Enter auto power save mode Only available for master unit

nb5 Auto snow-blowing mode 1

nb6 Auto snow-blowing mode 2

nb7 Exit auto snow-blowing mode

nb8 VIP address setting

nF1 Reserved nF2 Reserved

1 Only available for master unit(all indoor units running in cooling mode)
2 Only available for master unit(if all the indoor unit in the system are the 2nd generation indoor units, all the indoor units will run in heating mode. Once there is one or more old indoor unit in the system, all the indoor units will run in force cooling mode)
3 Only available for the master unit, the system does not check the indoor units' number.
4 Only available for outdoor unit with two compressors. If one of the two compressors is fail, the other compressor will keep running for up to 4 days and then stop automatically.
5 Only available for the master unit
6 Only available for the master unit, 100% capacity output
7 Only available for the master unit, 90% capacity output
8 Only available for the master unit, 80% capacity output 9 Only available for the master unit, 70% capacity output 10 Only available for the master unit, 60% capacity output 11 Only available for the master unit, 50% capacity output 12 Only available for the master unit, 40% capacity output

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