Table of Contents
[ II Restrictions ]
1. Refrigerant pipe size
(1) Between outdoor unit and the first twinning pipe (Part A)
Outdoor units
200
250
300
350
400
450
500
550
600
650
700
750
800
(2) Between BC controller and indoor unit (Sections a, b, c, d, e, and f )
Indoor unit
P15, P20, P25, P32, P40
P50, P63, P71, P80
P100, P125, P140
P200
P250
P400
P500
(3) Between the main and sub BC controllers (Section C)
Indoor unit
- P200
P201 - P300
P301 - P350
P351 - P400
P401 - P450
Select the proper size pipes for the main unit based on the total capacity of the indoor units that are connected to both sub
BC controllers. Select the proper size pipes for the sub controller side based on the total capacity of the indoor units that are
connected to the sub controller.
HWE07130
Refrigerant pipe size
Low-pressure pipe
High-pressure pipe
ø19.05 [3/4"]
ø15.88 [5/8"]
ø22.2 [7/8"]
ø19.05 [3/4"]
ø22.2[7/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø34.93 [1-3/8"]
Refrigerant pipe size
Liquid pipe
ø6.35 [1/4"]
ø9.52 [3/8"]
ø12.7 [1/2"]
ø15.88 [5/8"]
Refrigerant pipe size (Brazed connection on all models )
Liquid pipe
ø9.52 [3/8"]
ø12.7 [1/2"]
ø15.88 [5/8"]
- 49 -
Connection to outdoor unit and BC controller
Low-pressure pipe
ø19.05 [3/4"]
ø22.2 [7/8"]
ø28.58 [1-1/8"]
ø34.93 [1-3/8"]
(Flare connection for all models)
Gas pipe
Liquid pipe
ø12.7 [1/2"]
ø6.35 [1/4"]
ø15.88 [5/8"]
ø9.52 [3/8"]
ø19.05 [3/4"]
ø12.7 [1/2"]
ø28.58
[1-1/8"]
ø34.93
[1-3/8"]
ø15.88 [5/8"]
ø38.1 [1-1/2"]
High-pressure gas pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
Unit : mm [inch]
High-pressure pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
ø28.58 [1-1/8"]
Unit : mm [inch]
Indoor unit connection
Gas pipe
ø12.7 [1/2"]
ø15.88 [5/8"]
ø19.05 [3/4"]
ø28.58
[1-1/8"]
ø34.93
[1-3/8"]
ø38.1 [1-1/2"]
Unit : mm [inch]
Low-pressure gas pipe
ø19.05 [3/4"]
ø22.2 [7/8"]
ø28.58 [1-1/8"]
GB
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