7. CAPACITY TABLES
7-4. Correction by refrigerant piping length
CITY MULTI indoor unit 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 7-4-1 and 7-4-2, capacity can be found.
7-4-3 shows how to obtain the equivalent piping length.
7-4-1. Cooling capacity correction
MXZ-SM36NAM2-U1, MXZ-SM36NAMHZ2-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0
50
100
150
200
250
Piping equivalent length (ft)
MXZ-SM48NAM2-U1, MXZ-SM48NAMHZ2-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0
50
100
150
200
250
Piping equivalent length (ft)
MXZ-SM72TAM-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0
50
100
150
200
Piping equivalent length (ft)
MXZ-SM120TAM-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0
50
100
150
200
Piping equivalent length (ft)
M-P0890
Total capacity of indoor unit
18 [kBtu/h]
27 [kBtu/h]
36 [kBtu/h]
46.8 [kBtu/h]
300
350
400
450
500
550
600
Total capacity of indoor unit
24 [kBtu/h]
36 [kBtu/h]
48 [kBtu/h]
62.4 [kBtu/h]
300
350
400
450
500
550
600
Total capacity of indoor unit [kBtu/h]
250
300
350
400
450
500
Total capacity of indoor unit [kBtu/h]
250
300
350
400
450
500
MXZ-SM42NAMHZ2-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0
50
100
150
200
MXZ-SM60NAM2-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0
20
40
60
80
MXZ-SM96TAM-U1
1.00
36
0.95
54
0.90
72
0.85
93.6
0.80
0.75
0.70
0
50
100
150
48
72
96
124.8
SMART MULTI
Total capacity of indoor unit
250
300
350
400
450
500
550
Piping equivalent length (ft)
Total capacity of indoor unit
100
120
140
160
180
200
220
240
Piping equivalent length (ft)
Total capacity of indoor unit [kBtu/h]
200
250
300
350
400
450
Piping equivalent length (ft)
21 [kBtu/h]
31.5 [kBtu/h]
42 [kBtu/h]
54.6 [kBtu/h]
600
30 [kBtu/h]
45 [kBtu/h]
60 [kBtu/h]
78 [kBtu/h]
260
48
72
96
124.8
500
42