Mitsubishi Electric PURY-P350YJM-A [17/39] Additional refrigerant charge
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Mitsubishi Electric PURY-P350YJM-A [17/39] Additional refrigerant charge

Mitsubishi Electric PURY-P350YJM-A [17/39] Additional refrigerant charge
17
GB
10. Additional refrigerant charge
At the time of shipping, the outdoor unit is charged with refrigerant.
This charge does not include the amount needed for extended piping and
additional charging of each refrigerant line will be required on site. In order that
future servicing may be properly provided, always keep a record of the size and
length of each refrigerant line and the amount of additional charge by writing it in
the space provided on the outdoor unit.
10.1. Calculation of additional refrigerant
charge
Calculate the amount of additional charge based on the length of the piping
extension and the size of the refrigerant line.
Use the table below as a guide for calculating the amount of additional
charging and then charge the system accordingly.
If the calculation results in a fraction of less than 0.1 kg, round up to the next
0.1 kg. For example, if the result of the calculation was 30.73 kg, round the
result up to 30.8 kg.
•
•
•
<Additional charge>
Additional refrigerant
charge
=
High-pressure
pipe size
Total length of ø28.58
×0.36
+
High-pressure
pipe size
Total length of ø22.2
×0.23
+
High-pressure
pipe size
Total length of ø19.05
×0.16
+
High-pressure
pipe size
Total length of ø15.88
×0.11
+
Liquid Piping Size
Total length of ø15.88
×0.2
(kg) (m)×0.36(kg/m) (m)×0.23(kg/m) (m)×0.16(kg/m) (m)×0.11(kg/m) (m)×0.2(kg/m)
+
Liquid Piping Size
Total length of ø12.7
×0.12
+
Liquid Piping Size
Total length of ø9.52
×0.06
+
Liquid Piping Size
Total length of ø6.35
×0.024
(m)×0.12(kg/m) (m)×0.06(kg/m) (m)×0.024(kg/m)
+
Total Outdoor Unit
Model Name
BC controller
(Standard/Main)
Per Unit
+
BC controller
(Main) HA-type
+
BC controller
(Sub) Total Units
BC controller
(Sub) Per Unit
+
Total Capacity of
Connected Indoor Units
Per Indoor
Unit
~80
2.0kg
(E)P200 2.0kg
2.0 kg
1 1.0 kg
81~160 2.5kg
(E)P250~(E)P500 3.0kg 161~330 3.0kg
(E)P550~(E)P900 5.0kg
2 2.0 kg
331~390 3.5kg
391~480 4.5kg
481~630 5.0kg
631~710 6.0kg
711~800 8.0kg
801~890 9.0kg
891~1070 10.0kg
1071~1250 12.0kg
1251~
14.0kg
<Example>
Indoor 1: 80 A: ø28.58 40 m a: ø9.52 10 m
At the
conditions
below:
2: 250 B: ø9.52 10 m b: ø9.52 5 m
3: 32 C: ø9.52 20 m c: ø6.35 5 m
4: 40 D: ø9.52 5 m d: ø6.35 10 m
5: 32 E: ø9.52 5 m e: ø6.35 5 m
6: 63 F: ø22.2 3 m f: ø9.52 5 m
G: ø19.05 1 m
Outdoor P550
The total length of each liquid line is as follows:
ø28.58: A = 40 m
ø22.2: F = 3 m
ø19.05: G = 1 m
ø9.52: C + D + E + a + b + f = 50 m
ø6.35: c + d + e = 20 m
Therefore,
<Calculation example>
Additional refrigerant charge
= 40 × 0.36 + 3 × 0.23 + 1 × 0.16 + 50 × 0.06 + 20 × 0.024 + 5 + 2 + 5
= 30.8 kg
Limitation of the amount of refrigerant to be charged
The above calculation result of the amount of refrigerant to be charged must become below the value in the table below.
Outdoor unit model P200 P250 P300 P350 P400 P450 P500 P550 P600 P650 P700 P750 P800 P850 P900
Maximum amount of
refrigerant *1 kg
24.8kg 33.8kg 34.8kg 39.7kg 46.7kg 53.7kg 60.2kg 69.2kg 72.9kg 74.6kg 90.3kg 91.5kg 91.5kg 91.5kg 91.5kg
Outdoor unit model
EP200 EP250 EP300 EP350 EP400 EP450 EP500 EP550 EP600 EP650 EP700
Maximum amount of
refrigerant *1 kg
27.3kg 34.0kg 35.0kg 39.7kg 47.5kg 49.2kg 62.9kg 69.6kg 73.3kg 74.8kg 74.8kg
*1 Amount of additional refrigerant to be charged on site
•
WT05963X01_GB.indd 17WT05963X01_GB.indd 17 2010/08/26 20:39:462010/08/26 20:39:46

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