Hitachi UTOPIA RAS-4 Series - Page 101

9 Piping work and refrigerant charge
Refrigerant charge amount
TCGB0136 rev.1 - 05/2021
93
9
! CAUTION
Donotexceedtheallowedmaximumadditionalcharge.

Step 2: Charging work
Charge refrigerant into the system according to the instructions in the Service Manual.

Step 3: Total refrigerant charge of the system (W
TOT
(kg))
The total refrigerant charge of this system is calculated by the following formula:
W
TOT
= W
0
+ W
1
System example (W
TOT
) = + = kg

Step 4: Record the refrigerant charge
Fill the “F-Gas Label” with the refrigerant charge quantity in order to facilitate maintenance and servicing activities:
4
4

Factory Charge

Additional Charge

Total Charge

t CO
2