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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.
Cooling Norminal
Model(T)
Capacity
kBtu/h
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.
31-5000573 Rev. 2
Outdoor
Combination Type
single
single
single
single
combination(6+8)
combination(8+8)
combination(10+8)
combination(10+10)
combination(10+12)
combination(12+12)
combination(8+8+10)
combination(10+10+8)
combination(10+10+10)
combination(12+10+10)
combination(12+12+10)
combination(12+12+12)
Indoor
Maximum Number
Total indoor
of Connected Indoor
capacity
Units
kBtu/h
15
36~94
18
48~125
21
60~156
24
72~187
33
84~218
36
96~250
39
108~281
42
120~312
51
132~343
54
144~374
57
156~405
60
168~437
63
180~468
64
192~499
64
204~530
64
216~562
Combined
capacity range
50%~130%
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