Correction By Refrigerant Piping Length; Operation Limit - Mitsubishi Electric PFD-P250VM-E Service Manual

2-4. Correction by refrigerant piping length

To obtain a decrease in cooling/heating capacity due to refrigerant piping extension, multiply by the capacity
correction factor based on the refrigerant piping equivalent length in the table below.
1
0.9
0.8
0.7
0 20 40 60
Piping equivalent length (m)
• How to obtain piping equivalent length
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.50

2-5. Operation limit

• Cooling
30
25
20
15
12
10
-15 -10 -5
* The height between the Outdoor PUHY-P-YGM-A and Indoor could make the running
temperature range narrow. For details refer to P19, 7-1 Refrigerant Piping System.
• Heating
30
25
20
15
10
5
-20 -15 -10
80 100 120 140 160
0 5 10 15 20
Outdoor temperature (˚CDB)
-5 0 5 10 15
Outdoor temperature (˚CWB)
180
number of bent on the piping)m
25 30 35 40 45
20 25 30 35 40
6
45 50