Hitachi RAM-10MQ, Инструкция по установке и обслуживанию

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(9) The Additional Refrigerant
Outdoor unit has been filled with refrigerant, but still need to add an appropriate amount of refrigerant based on the length
of the pipe.
Please follow the steps below to calculate the additional amount of refrigerant, and fill the outdoor unit with it.
Note:
‧
W
0
is outdoor unit ref. charge before shipment.
‧
In case of the combination of the base unit, calculate
the total ref. charge before shipment of the outdoor
units to be combined.
<Max. Additional Refrigerant Charge Quantity>
Outdoor Unit
RAM-8,10MQ(D) RAM-12MQ(D) RAM-14,16MQ(D)
RAM-18MQ(D),
20~24HP
26~54HP
Max. Additional Ref.
Charge Quantity
28.0 36.0 40.0 51.0 63.0
Model W
0
Outdoor Unit Ref. Charge(Kg)
RAM-8~10MQ(D) 6.5
RAM-12MQ(D) 7.5
RAM-14MQ(D)
9.0
RAM-16MQ(D)
RAM-18MQ(D) 10.5
＝
W
＋
Wo = 100 kg
1. Calculation of Additional Refrigerant W (kg)
No
.
kg
22.2
x1.0kg/unit =
1 W1
19.05
15.88
12.7
9.53
6.35
m
m
m
m
m
m
x0.39=
x0.28=
x0.19=
x0.12=
x0.06=
x0.03=
/ /
kg
W
kg
Refrigerant Content
Additional Refrigerant (kg)
Additional Amount of Refrigerant for Liquid Pipe W1(kg)
Pipe Size Pipe Length (m)
The Amount of
Refrigerant
Per Meter
Additional Amount
of Refrigerant W1(kg)
Total Amount of Additional Refrigerant for Liquid Pipe
Additional Amount of Refrigerant for Indoor Unit W2(kg)
8HP, 10HP each indoor unit needs addition 1 kg of refrigerant.
There is no addition of refrigerant for the unit less than 8HP.
The Total Number of 8HP, 10HP Indoor Unit Additional Amount of Refrigerant W2(kg)
Calculation of Indoor Unit Connection Capacity Ratio
(Indoor Unit Total Capacity / Outdoor Unit Capacity)
Condition Additional Amount of Refrigerant W3(kg)
Connection Capacity Ratio
≦
100% 0.0kg
Connection Capacity Ratio 100 ~ 115% 0.5kg
Connection Capacity Ratio 116 ~ 130% 1.0kg
Additional Amount of Refrigerant W(kg)
＝
(W1
＋
W2
＋
W3)
Ref. Charge Amount of O.U Before Shipment ( W
0
) kg
2. Additional Refrigerant Filling Amount Records
Please refer to the following formula to calculate the
total charges of system
Total charges of system
＝
W
＋
W
0
Note :
W
0
: Factory refrigerant charging weight.
Additional Refrigerant
:
System Refrigerant
:
Additional Refrigerant Date
:
W2
W3
W
2
3
4
kg
kg
kg