Installation manual

[ II Restrictions ]
- 53 -
HWE10050 GB
1. Refrigerant pipe size
(1) Between outdoor unit and BC controller (Part A)
(2) Between BC controller and indoor units (Sections a, b, c, d, e, and f)
(3) Between the main and sub BC controllers (Section C)
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.
Unit : mm [inch]
Outdoor units High-pressure pipe Low-pressure pipe
(E)P200 ø15.88 [5/8"] ø19.05 [3/4"]
(E)P250 ø19.05 [3/4"] ø22.2 [7/8"]
(E)P300 ø19.05 [3/4"] ø22.2 [7/8"]
(E)P350 ø19.05 [3/4"] ø28.58 [1-1/8"]
(E)P400 ø22.2 [7/8"] ø28.58 [1-1/8"]
(E)P450 ø22.2 [7/8"] ø28.58 [1-1/8"]
(E)P500 ø22.2 [7/8"] ø28.58 [1-1/8"]
(E)P550 ø28.58 [1-1/8"] ø28.58 [1-1/8"]
(E)P600 ø28.58 [1-1/8"] ø28.58 [1-1/8"]
(E)P650 ø28.58 [1-1/8"] ø28.58 [1-1/8"]
(E)P700 ø28.58 [1-1/8"] ø34.93 [1-3/8"]
P750 ø28.58 [1-1/8"] ø34.93 [1-3/8"]
P800 ø28.58 [1-1/8"] ø34.93 [1-3/8"]
P850 ø28.58 [1-1/8"] ø41.28 [1-5/8"]
P900 ø28.58 [1-1/8"] ø41.28 [1-5/8"]
Unit : mm [inch]
Indoor unit Liquid pipe Gas pipe
P15 - P50 ø6.35 [1/4"] ø12.7 [1/2"]
P63 - P140 ø9.52 [3/8"] ø15.88 [5/8"]
P200 ø9.52 [3/8"] ø19.05 [3/4"]
P250 ø9.52 [3/8"] ø22.2 [7/8"]
Unit : mm [inch]
Total capacity of downstream indoor
units
Liquid pipe High-pressure gas pipe Low-pressure gas pipe
- P200 ø9.52 [3/8"] ø15.88 [5/8"] ø19.05 [3/4"]
P201 - P300 ø9.52 [3/8"] ø19.05 [3/4"] ø22.2 [7/8"]
P301 - P350 ø12.7 [1/2"] ø19.05 [3/4"] ø28.58 [1-1/8"]
P351 - P400 ø12.7 [1/2"] ø22.2 [7/8"] ø28.58 [1-1/8"]
P401 - P500 ø15.88 [5/8"] ø22.2 [7/8"] ø28.58 [1-1/8"]