Design Technical Manual

Table Of Contents
z
Connection pipe size
Connection pipe selection for when 2 or more indoor units are connected.
Indoor unit Indoor unit
Suction gas pipe
Discharge gas pipe
Liquid pipe
RB unit
Liquid pipe
Gas pipe
1234
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)]
Total capacity of
indoor unit (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
8,000 ≤ x < 36,000 3/8" (9.52)
5/8" (15.88)
+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
36,000 ≤ x < 48,000 3/8" (9.52) 3/4" (19.05)
48,000 ≤ x < 72,000
1/2" (12.70)
+Reducer-M
5/8" (15.88)
+Reducer-L
7/8" (22.22)
+Reducer-K
48,000 ≤ x < 60,000
1/2" (12.70)
+Reducer-G
7/8" (22.22)
+Reducer-I
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)
- (06 - 87) -
SYSTEM
DESIGN
SYSTEM
DESIGN