Haier AU482FIBHA - Page 10

9
( x10
2
W )/(x10
3
BTU/h)
32/12
25/9
18/7
40/14
Capacity
12
09
07
14
Model Model
( x10
2
W )/(x10
3
BTU/h)
Capacity
Model and capacity of indoor unit
21 60/21
24 71/24
18 50/18
The piping should consist to the diameter of indoor unit
piping. But during the first branch pipe, if the pipe length
is longer than 30m,a larger scale of gas pipe diameter
should be chosen.
Outdoor unit
First branch
Table1 Diameter of main piping [Inside ( ) is connecting way of outdoor unit]
Length of the longest piping after the first
branch piping L 30m
g
L4
h
i
Length of the longest piping L 70m
L2
L1
h 10m
f
L3
a b
c
d
e
Outdoor unit
First branch piping
Indoor unit
Drop height between indoor and outdoor units
Drop height between indoor units
Table2 Diameter of branch piping
*111/*38
111* ~ *182/38* ~ *62
*182/*62
22.22
19.05
15.88 9.52
9.52
12.7
Total capacity of indoor units
(x10
2
W)/(x10
3
BTU/h)
Gas piping Liquid piping
Piping operating precautions
1. When Using braze welding to connect the half union, inflate nitrogen to avoid pipe oxidation.
2. Use new clean piping as refrigerant piping. Be careful not to let water or foreign matters enter the pipe when operating.
3. When tightening and loosening connecting nuts, make sure to use two spanners simultaneously. Nuts cannot be tight
enough with only one spanner.
Selection of piping materials and dimension
Selection of the diameter of refrigerant piping
(following *** refer to the illustrations)
*Piping from outdoor unit to the first branch piping
(for short main piping hereinafter) Main piping should
consist to the piping dimension of outdoor unit.
*Piping between branch pipes (for short branch piping hereinafter):
Choosing of the diameter of branch pipe is according to the total capacity of all indoor units. But if exceeding the
capacity of outdoor unit, choosing is according the capacity of outdoor unit.
Tightening moment of connecting nuts
11.8(1.2kgf
.
m)
13.7(1.4kgf
.
m)
24.5(2.5kgf
.
m)
29.4(3.0kgf
.
m)
49.0(5.0kgf
.
m)
53.9(5.5kgf
.
m)
78.4(8.0kgf
.
m)
98.0(10.0kgf
.
m)
98.0(10.0kgf
.
m)
117.7(12.0kgf
.
m)
12.70mm
6.35mm
9.52mm
15.88mm
19.05mm
Connecting piping
diameter
Installation moment
Tightening
moment
Total capacity of all indoor units 9500W,
Adopt FQG-B120 for Y type branch pipe.
Total capacity of all indoor units 9500W*~ 17900W, Adopt FQG-B180 for Y type branch pipe.
Total capacity of all indoor units 17900W,Adopt FQG-B370 for Y type branch pipe.
9.52 (Screw thread)
AU242~282 type
Other type units
9.52 (Screw thread)
15.88 (Screw thread)
AU60N type
12.7(Screw thread)
22.22 (Soft soldering) 19.05(Screw thread)
Gas piping
Liquid piping
Gas piping
Liquid piping
Gas piping
Liquid piping
Installation Procedures
Connecting piping
*Piping between branch pipes and indoor units (for short indoor pipe hereinbefore):