Design Technical Manual

Table Of Contents
PIPE SELECTION
z
RB unit pipe size
Indoor unit side
Outdoor unit sideOutdoor unit side
Gas pipeLiquid pipe
Liquid pipeLiquid pipe
Suction gas pipeSuction gas pipe
Discharge gas pipeDischarge gas pipe
L-side R-side
Outdoor unit side [in. (mm)] Indoor unit side [in. (mm)]
Liquid pipe Discharge Gas pipe Suction Gas pipe Liquid pipe Gas pipe
5/8" (15.88) 7/8" (22.22) 1-1/8" (28.58) 3/8" (9.52) 3/4" (19.05)
z
Connection pipe size
Connection pipe selection for when only 1 indoor unit is connected.
Suction gas pipe
Discharge gas pipe
Liquid pipe
Indoor unit
1234
Liquid pipeGas pipe
RB unit
Note: Be sure to connect indoor unit to furthest port (position 1) from outdoor unit.
Total capacity of
indoor unit (Btu/h)
Outdoor unit side [in. (mm)]
Indoor unit
capacity (Btu/h)
Indoor unit side [in. (mm)]
Liquid pipe
Discharge Gas
pipe
Suction Gas
pipe
Liquid pipe Gas pipe
4,000 ≤ x < 36,000
3/8" (9.52)
+Reducer-M
1/2" (12.70)
+Reducer-L
5/8" (15.88)
+Reducer-K
4,000 7,500
9,000 12,000
14,000
1/4" (6.35)
+Reducer-H
1/2" (12.70)
+Reducer-J
36,000 ≤ x < 48,000
3/8" (9.52)
+Reducer-M
1/2" (12.70)
+Reducer-L
3/4" (19.05)
+Reducer-K
18,000 24,000
30,000 34,000
3/8" (9.52)
5/8" (15.88)
+Reducer-J
48,000 ≤ x < 72,000
1/2" (12.70)
+Reducer-M
5/8" (15.88)
+Reducer-L
7/8" (22.22)
+Reducer-K
36,000 48,000
60,000
3/8" (9.52) 3/4" (19.05)
72,000 ≤ x < 96,500
1/2" (12.70)
+Reducer-M
3/4" (19.05)
+Reducer-L
7/8" (22.22)
+Reducer-K
96,500 ≤ x < 153,000
1/2" (12.70)
+Reducer-M
3/4" (19.05)
+Reducer-L
1-1/8" (28.58)
153,000 ≤ x < 161,000 5/8" (15.88)
3/4" (19.05)
+Reducer-L
1-1/8" (28.58)
161,000 ≤ x < 193,000 5/8" (15.88) 7/8" (22.22) 1-1/8" (28.58)
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SYSTEM
DESIGN
SYSTEM
DESIGN