Hitachi EV-1.5N Installations- Und Betriebshandbuch Seite 17

Expansion Valve Kit EV-.5N
Installation & Operation Manual
1.3. Additional refrigerant charge calculation between expansion valve kit and I.U. (W
Additional refrigerant charge is 0.05kg/m (per unit) between expansion valve kit and I.U.
(Example: 5 units – Expansion valve kit))
3 units: 4m
This system
1.4. Calculation of additional charge (W kg)
Put weight W , weight W
 2
Total volume of additional charge
(Example)
This system
2. Record of additional charge
Record the refrigerant charging quantity in order to facilitate maintenance and servicing activities.
Total refrigerant charge of this system is calculated in the following formula.
Total refrigeranrt charge of this system
This system
*(see next table for W values)
0
Outdoor Unit
RAS- 8FXN
RAS-10FXN
RAS-12FXN
RAS-16FXN
RAS-18FXN
RAS-20FXN
RAS-22FXN
RAS-24FXN
RAS-26FXN
RAS-30FXN
RAS-32FXN
?
NOTES:
1. W is outdoor unit ref. charge before shipment.
0
2. E.V.K.: Expansion Valve Kit for wall type units.
3. *1: The total amount of the additional refrigerant charge must not exceed the value in the table.
Page 5
W = 3
3'
Total:
W =
3'
W =
3''
W =
3'''
Total:
and weight W calculated in items 1.1, 1.2 and 1.3 into the following formula.
3
W =
W =
W =
W +
+
W Outdoor Unit
0
ref. charge (kg)
8.5
9.5
0.0
9.0
9.0
9.0
9.0
26.0
26.0
26.0
26.0
PMML083A - 07/2008
kg)
3
units x 4 m x 0.05 kg/m =
W
units x m x 0.05 kg/m =
units x m x 0.05 kg/m =
units x m x 0.05 kg/m =
W = W3' + W3'' + W3''' =
3
W + W +
 2
7.87 + 0.0 +
+ +
W
0*
= kg
Max. ref. charge
(kg) *1
22
22
22
34
34
34
34
52
52
52
52
0.60 kg
= 0.60 kg
3
kg
kg
kg
kg
W =
3
0.60 = 8.47 kg
= kg
Max. E.V.K. to be
connected (unit)
3
6
6
20
20
20
20
27
29
32
32