Capacity Reduction Ratio Due To Changes In Piping Length - Mitsubishi Electric PUH-P8MYA Technical & Service Manual

[4] Capacity Reduction Ratio due to Changes in Piping Length

(1) Cooling capacity
PUH-P8MYA
1
0.9
0.8
0 10 20
Equivalent piping length (m)
(2) Heating capacity
Model name
PUH-P8MYA
PUH-P10MYA
(3) Calculation formula of equivalent piping length
PUH-P8MYA
PUH-P10MYA
(4) Reduction ratio by frosting
Outdoor unit inlet wet bulb temperature
30 40 50 60
Equivalent piping length
- 30 m 30 - 50 m
1.0 0.995
Equivalent piping length (m) = Actual piping length (m) + (0.47 × Number of bend)
Equivalent piping length (m) = Actual piping length (m) + (0.5 × Number of bend)
(°CWB)
6
4
2
0
–2
–4
–6
–8
–10
1
0.9
0.8
70 0 10
50 - 70 m
0.99
Heating capacity reduction ratio
1.0
0.98
0.88
0.85
0.86
0.89
0.92
0.92
0.92
–15–
PUH-P10MYA
20 30 40 50
Equivalent piping length (m)
60 70