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V. Installation
8. Charge/recovery of refrigerant
V
36
8-2. Additional refrigerant amount calculation method
(1) The amount of refrigerant filled in the outdoor when the product is
delivered (on the base of piping 10 m)
(2) Additional amount of refrigerant as per the pipe diameter and length
(liquid pipe based)
Pipe diameter (mm)
Additional amount of
refrigerant(g/m)
6.35
50
9.52
80
12.70(
✻✻
040
✻✻
~
✻✻
075
✻✻
)
120
12.70(
✻✻
08
✻✻
~
✻✻
100
✻✻
)
140
(3) Additional refrigerant amount calculation method
Additional refrigerant amount = 12.70 (liquid pipe /high pressure pipe diameter) x 120g/m
+ 9.52 (liquid pipe /high pressure pipe diameter ) x 80g/m
+ 6.35 (liquid pipe /high pressure pipe diameter ) x 50g/m
(4) Example of additional refrigerant amount calculation
●
Additional amount of refrigerant = additional amount of refrigerant as per the total pipe length
●
Arrangement: liquid pipe diameter -gas pipe diameter - pipe length
Additional amount of refrigerant =(ø12.70 liquid pipe lengthX120g/m)+(ø9.52 liquid pipe lengthX80g/m)+
(ø6.35 liquid pipe lengthX50g/m)
=(20mX120g/m)+(25mX80g/m)+(25mX50g/m)
=5650g-
α
A B C D E
1
23456
7200W
10400W
14400W
21600W
7200W 4000W 3200W 3200W 2000W 2000W
DVM E-D/B(chapter5)-E<03759 3/21/02 7:40 PM Page 36