AirStage AO54FJ, Service Manual

Page: 129 / 169

7. INSTALLATION
7-1 ADDITIONAL CHARGE
07-01
(1) Pipe length
Liquid pipe (mm) 9.52 6.35
Additional refrigerant
0.06 0.02
(kg/m)
ADDITIONAL CHARGE = (1)
Total length
of 9.52mm
liquid pipe
x 0.06
(kg/m)
m
kg
Total length
of 6.35mm
liquid pipe
x 0.02
(kg/m)
m
kg
The amount of additional charge C(kg)
+ C =
(1) - 1.8(kg) =
Example :
When the liquid pipe length 9.52mm = 35m, 6.35mm = 20m
" Additional charge of pipe length " is
35(m) x 0.06(kg/m) + 20(m) x 0.02(kg/m) - 1.8(kg) = 0.7(kg) .....(1)
When adding refrigerant, follow the formula below.
If the result of (1) is more than 0, add the refrigerant according to the result.
If less or equal, there is no need to add the refrigerant.