7. CAPACITY TABLES
DATA G10
OUTDOOR UNITS
2 - 24
S
7-3. Correction by refrigerant piping length
CITY MULTI systems can have extended piping lengths if certain limitations are followed, but cooling/heating capacity could be
reduced. Using following correction factor by equivalent piping length shown at 7-3-1 and 7-3-2, capacity can be found. 7-3-3
shows how to obtain the equivalent piping length.
7-3-1. Cooling capacity correction
7-3-2. Heating capacity correction
7-3-3. How to obtain the equivalent piping length
1. PUMY-P100, 125, 140YHMB, VHMB
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.30 x number of bends on the piping) m
1
0.90
0.80
0.95
0.85
0.75
0.65
0.70
10
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
Cooling capacity correction factor
Piping equivalent length (m)
PUMY
-P100YHMB,VHMB
T
otal capacity of indoor unit
10
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
1
0.90
0.80
0.95
0.85
0.75
0.65
0.70
Cooling capacity correction factor
Piping equivalent length (m)
PUMY-P140YHMB,VHMB
T
otal capacity of indoor unit
10
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
1
0.90
0.80
0.95
0.85
0.75
0.65
0.70
Cooling capacity correction factor
Piping equivalent length (m)
PUMY
-P125YHMB,VHMB
T
otal capacity of indoor unit
PUMY
-P100,125,140YHMB,VHMB
1
0.90
0.80
0.95
0.85
0.75
0.65
0.70
10
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
Heating capacity correction factor
Piping equivalent length (m)
