Gree GMV5 Compact Series - Page 117

0 115 MAINTENACE
GMV5 COMPACT MULTI VRF UNIT
SERVICE MANUAL
d
c
b
a
室内机
① ② ③
④
B
A
C
室外机
D
Indoor Unit：
No.
Model
Indoor Unit①
Cassette type GMV-ND71T/A-T
Indoor Unit②
Wall-mounted type GMV-N36G/A3A-K
Indoor Unit③
Duct type GMV-ND50PLS/A-T
Indoor Unit④
Duct type GMV-ND25PLS/A-T
Liquid Pipe：
No.
A
B
C
D
Diameter
of pipe
φ9.52
φ9.52
φ9.52
φ6.35
Length
20m
10m
5m
5m
No.
a
b
c
d
Diameter
of pipe
φ9.52
φ6.35
φ6.35
φ6.35
Length
10m
10m
10m
10m
Length of Liquid Pine：
φ9.52：A+B+C+a=20+10+5+10=45m
φ6.35：D+b+c+d=5+10+10+10=35m
L= (9.52Length of liquid pipe)×1+(6.4 Length of liquid pipe) ×0.4
= 45×1+35×0.4=59m
LA=L-50=59-50=9 m
Additional volume of refrigerant R=LA×54 =9×54=486 g
b. Operation procedure for adding refrigerant
b1. Put the charging tank on the weightometer, record the reading and then calculate the data after charging
refrigerant;
b2. Use charging conduct pipe to connect the double-ended manometer with governing valve and liquid-charging
tank to the detection head of gas valve and liquid valve. Before connection, please release some refrigerant and
then drain out the air inside the charging conduct pipe;
Outdoor unit
Indoor unit