BGH BV-V28W/DHN1 Manual page 79

VRF 50/60Hz
3.5 Selecting Piping Diameters
Tables 3-3.4 to 3-3.6 below, specify the required pipe diameters for the indoor and outdoor piping. The main pipe (L
first indoor branch joint (A) should be sized according to whichever of Tables 3-3.4 and 3-3.5 indicates the larger size.
Figure 3-3.4: Selecting piping diameters
Legend
L Main pipe
1
L to L Indoor main pipes
2 5
a to f Indoor auxiliary pipes
A to E Indoor branch joints
Table 3-3.4: Main pipe
Capacity of indoor unit (A×10W)
Notes:
1. The main pipe (L
indicates the larger size.
Table 3-3.5: Main pipe (L
1
Capacity of
Equivalent length of all liquid pipes and gas pipes < 90m
outdoor unit
Gas pipe (mm)
(A×10W)
A<155 Φ15.9
155≤A<230 Φ19.1
Notes:
1. The main pipe (L ) and first indoor branch joint (A) should be sized according to whichever of Tables 3-3.4 and 3-3.5 indicates the larger size.
1
The straight distance between copper pipe turning and the contiguous branch pipe is at least 0.5 m.
2.
The straight distance between the contiguous branch pipes is at least 0.5 m.
3.
The straight distance which the branch pipes connected to the IDU is at least 0.5 m.
4.
78
(L ) indoor main pipes (L
1
1
A<160
160≤ A<230
) and first indoor branch joint (A) should be sized according to whichever of Tables 3-3.4 and 3-3.5
1
) and first indoor branch joint (A)
1
Liquid pipe (mm)
Φ9.53
Φ9.53
Table 3-3.6: Indoor auxiliary pipes (a to f)
Capacity of indoor unit (A×100W)
A≤45
A≥56
Table 3-3.7: Pipe diameter of the outdoor unit
Outdoor unit model
BV-V28W/DHN1(At)
BV-V36W/DHN1(At)
BV-V42W/DHN1(At)
BV-V48W/DHN1(At)
BV-V56W/DHN1(At)
Figures in parentheses
indicate indoor unit
capacity indexes.
to L ) and indoor branch joint kits
2 5
Gas pipe (mm) Liquid pipe (mm)
Φ15.9
Φ19.1
Equivalent length of all liquid pipes and gas pipes ≥ 90m
Branch joint kit Gas pipe (mm)
FQZHN-01D
FQZHN-01D
Gas pipe (mm)
Φ12.7
Φ15.9
Gas pipe (mm)
Φ15.9
Φ19.1
Branch joint kit
Φ9.53 FQZHN-01D
Φ9.53 FQZHN-01D
Liquid pipe (mm)
Φ19.1 Φ9.53
Φ22.2 Φ9.53
Liquid pipe (mm)
Φ6.35
Φ9.53
Liquid pipe (mm)
Φ9.53
Φ9.53
) and
1
Branch joint kit
FQZHN-01D
FQZHN-02D