–15–
[4] Capacity Reduction Ratio due to Changes in Piping Length
(1) Cooling capacity
(2) Heating capacity
(3) Calculation formula of equivalent piping length
PUH-P8YE
PUH-P10YE
Model name
Equivalent piping length
- 30 m
30 - 50 m
50 - 70 m
1.0
0.995
0.99
PUH-P8YE
Equivalent piping length (m) = Actual piping length (m) + (0.47
×
Number of bend)
PUH-P10YE
Equivalent piping length (m) = Actual piping length (m) + (0.5
×
Number of bend)
6
1.0
4
0.98
2
0.88
0
0.85
–2
0.86
–4
0.89
–6
0.92
–8
0.92
–10
0.92
(4) Reduction ratio by frosting
Outdoor unit inlet wet bulb temperature
Heating capacity reduction ratio
(
°
CWB)
Capacity r
atio
Equivalent piping length (m)
0
10
20
30
40
50
60
70
0.8
0.9
1
PUH-P8YE
Capacity r
atio
Equivalent piping length (m)
0
10
20
30
40
50
60
70
0.8
0.9
1
PUH-P10YE
