Additional Refrigerant Charge - Hitachi HRNM Série Manuel D'installation

ADDITIONAL REFRIGERANT CHARGE

26
12.3. REFRIGERANT CHARGING QUANTITY
Outdoor Units has been charged with refrigerant for 30m of
actual piping length. An additional refrigerant charged is
required in systems with actual piping length longer than
30m.
1. Determine an additional refrigerant quantity according to
the following procedure, and charge it into the system.
2. Record the additional refrigerant quantity to facilitate
service activities thereafter.
Outdoor unit factory refrigerant charge before shipment:
13. ADDITIONAL REFRIGERANT CHARGE
Although refrigerant has been charged into this unit.
It is required that additional refrigerant be charged according to piping length
Additional refrigerant charge calculation
A. Determine the additional refrigerant quantity according to the following procedure, and charge it into the system.
W = W
W: Total additional refrigerant quantity (W)
W Outdoor unit factory refrigerant charge before shipment
0.:
W Refrigerant charge according to piping length (W
1:
P: Compensating rate.
B. Record the additional refrigerant quantity to facilitate service activities thereafter.
O/U MODEL
RAS-8
RAS-10
RAS-12
– P
1
CAUTION:
When charging refrigerant accurately measure
refrigerant to be charged.
Overcharging or undercharging of refrigerant can
cause compressor trouble
In case of actual piping length less than 5 m, consult
your distributor.
Wo (Kg)
7.3
7.8
8.5
).
1