Correction By Refrigerant Piping Length - Mitsubishi Electric CITY MULTI PEFY-P22VMS-E-S Data Book

6. CAPACITY TABLES

6-3. Correction by refrigerant piping length

CITY MULTI system can extend the piping flexibly within its limitation for the actual situation. Yet, a decrease of cooling/heating
capacity could happen correspondently. Using following correction factor according to the equivalent length of the piping shown at
6-3-1 and 6-3-2, the capacity can be observed. 6-3-3 shows how to obtain the equivalent length of piping.
6-3-1. Cooling capacity correction
PUHY-P300YRJC-A
1
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0 20 40 60
Piping equivalent length (m)
PUHY-P350YRJC-A
1
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0 20 40 60
Piping equivalent length (m)
6-3-2. Heating capacity correction
PUHY-P300,350,400,450YRJC-A
1.00
0.95
0.90
0 20 40 60
Piping equivalent length (m)
6-3-3. How to obtain the equivalent piping length
1. PUHY-P300YRJC
Equivalent length = (Actual piping length to the farthest indoor unit ) + (0.42 x number of bent on the piping) [m]
2. PUHY-P350YRJC
Equivalent length = (Actual piping length to the farthest indoor unit ) + (0.47 x number of bent on the piping) [m]
3. PUHY-P400, 450YRJC
Equivalent length = (Actual piping length to the farthest indoor unit ) + (0.50 x number of bent on the piping) [m]
Total capacity of indoor unit
150
225
300
390
80 100 120 140
Total capacity of indoor unit
175
263
350
455
80 100 120 140
80 100 120 140
OUTDOOR UNITS
PUHY-P400YRJC-A
1
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0 20 40 60
Piping equivalent length (m)
PUHY-P450YRJC-A
1
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0 20 40 60
Piping equivalent length (m)
C7-R Rev.
Total capacity of indoor unit
200
300
400
520
80 100 120 140
Total capacity of indoor unit
225
338
450
585
80 100 120 140
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