Adding refrigerant
After finishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of
refrigerant.
Calculation of additional refrigerant charge amount
Refrigerant charge amount at shipment from the factory does not include the refrigerant for pipes at the local site.
For refrigerant to be charged in pipes at the local site, calculate the amount and charge it additionally.
NOTE
If the additional refrigerant amount indicates minus as the result of calculation, use the air conditioner without
additional refrigerant.
Additional refrigerant charge amount at site = [1] + [2] + [3]
[1]. Compensation by system HP (Table 1)
[2]. Corrective amount of refrigerant depending on the indoor units (Table 2)
[3]. Real length of liquid pipe × Additional refrigerant charge amount per liquid pipe 1 m (Table 3)
Table 1
System
HP
Charged refrigerant
(kg)
Compensation
by System HP
(kg)
8
5.7
+0.0
10
5.7
+0.4
12
5.7
+0.8
Table 3
Pipe dia. at liquid side
mm
ø6.4
ø9.5
ø12.7
ø15.9
Additional refrigerant amount/1m
kg/m
0.025
0.055
0.105
0.160
Indoor unit Capacity rank
005 007 008 009 010 012 014 015 017 018 020 024 027 030 036 048 056 072 096
Capacity code (Equivalent to HP)
0.6
0.8
0.9
1
1.1
1.3
1.4
1.7
1.8
2
2.3
2.5
3
3.2
5
4
8
6
10
Corrective amount of refrigerant (kg)
Table
2
Corrective amount of refrigerant varies according to indoor unit capacity rank.
0.4
0.6
1.0
0.2
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