Hitachi UTOPIA R32 Series Technical Catalogue page 101

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