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INSTALLATION INSTRUCTIONS
Installation Requirements Checklist
•
Is the total indoor unit capacity within the allowable capacity ratio?
•
Does the refrigerant line size and length fall into the allowable range per the design software?
•
Are the refrigerant lines installed according to this installation guide? Are the branch fittings laying flat and have proper
clearance between them?
•
Are all branch fittings installed on horizontal runs?
•
Was additional refrigerant added per the design software?
•
Was the system properly leak tested?
•
Are the indoor units on a common circuit breaker?
•
Is the power supply voltage within the acceptable range per the equipment name plates?
•
Have all indoor and outdoor unit dip switches been properly set with the correct address?
Combinations and Options
1. Before installation, check if the model, power supply, pipe, wires, and parts purchased are correct.
2. Check to see if the indoor and outdoor units are properly matched according to the following table.
Outdoor
Model(T)
Cooling Norminal Capacity
6
72
8
96
10
120
12
144
14
168
16
192
18
216
20
240
22
264
24
288
26
312
28
336
30
360
32
384
34
408
36
432
NOTES:
• The total indoor unit capacity should be less than or equal to the total outdoor unit capacity if all indoor units are
operating at the same time. The allowable ratio is 50 to 130%. Please consult the manufacturer if your needs exceed this
limitation.
• The total indoor unit capacity should be less than the total outdoor capacity if system operating conditions are below
23°F or above 105°F.
• All electrical conductors should be sized according to the load they will carry.
• Only for 2 unit ODU combination (X+Y), use piping kit: HZG-R20B
49-5000878 Rev. 0
Indoor
Maximum Number of
Combination Type
Connected Indoor Units
Single
15
Single
18
Single
21
Single
24
Single
33
Single
36
Single
39
Single
42
Combination (10+12)
51
Combination (12+12)
54
Combination (12+14)
57
Combination (12+16)
60
Combination (14+16)
63
Combination (16+16)
64
Combination (16+18)
64
Combination (18+18)
64
Total indoor capacity
Combined
kBtu/h
range
36-94
48-125
60-156
72-187
84-218
96-250
108-281
120-312
50%-130%
132-343
144-374
156-405
168-437
180-468
192-499
204-530
216-562
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