Hitachi FSG Series, Технический каталог

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REFRIGERANT PIPING AND REFRIGERANT CHARGE
13
/41
ITEM LINE BRANCH DOWN-SIZE SYSTEM
Example of Systems
This figure shows examples of 6 indoor units combined
with one outdoor unit.
The refrigerant pipes are shown as single line in the
diagrams.
However, liquid line piping and gas line piping are required
in the field.
?
NOTE:
Provide oil trap to gas line at every H
t
meters lift.
(H
t
is indicated in chapter 13.1.1)
Actual Length Lt
£
120 m
Maximum Piping
Length
Equivalent Length Lt
£
150 m
In the case that the position of outdoor unit
is higher than that of indoor unit.
H1
£
50 m
Maximum Lift
between
Outdoor Unit
and Indoor Unit
In the case that the position of outdoor unit
is lower than that of indoor unit.
H1
£
40 m
Maximum Lift between Each Indoor Unit, or Multi-Kit and
indoor Unit
H2
£
15 m
Between Multi-Kit "a" and the Farthest
Indoor Unit
L
£
40 m
Maximum
Piping Length
between Multi-
Kit and Indoor
Unit
Between Each Multi-Kit and Each Indoor
Unit
L0, L1, L2, L3, L4
£
30 m
Choice of each Multi-kit
Refer to item 12.1.2 at Extended Uni-Piping Method for
selection of the piping size for the multi-kit.
Example: In case of RAS-30FSG1
Liquid
Line
Example: In case of RAS-30FSG1
Indoor unit
Example: In case of RAS-30FSG1
Quaintly of Additional Refrigerant Charge
The quantity is calculated by the following
equation:
W (kg) = W10 + W11+W12+W13+W14+W15+W2
1) W10 (kg): (Total Length (m) of Ø22.2
Liquid Piping) x 0.390
W11 (kg): (Total Length (m) of Ø19.05
Liquid Piping) x 0.280
W12 (kg): (Total Length (m) of Ø15.88
Liquid Piping) x 0.190
W13 (kg): (Total Length (m) of Ø12.7
Liquid Piping) x 0.120
W14 (kg): (Total Length (m) of Ø9.53
Liquid Piping) x 0.065
W15 (kg): (Total Length (m) of Ø6.35
Liquid Piping) x 0.026
2) W2 (kg)
Total quantity of Additional Refrigerant of
Each Indoor unit (kg)
Total
W (kg) = W10+W11+W12+W13+W14+W15+W2
= 3.9+2.8+1.9+0.6+2.08+0+0 = 11.28 kg
Mark a b,c d e
Multi-Kit
E-302S E-242S E-162M1 E-102ME1
Mark LM1 LM2 LM3 LM4 LM5 L0 L1 L2 L3 L4 L5
Size Ø22.2 Ø19.05 Ø15.88 Ø12.7 Ø9.53 Ø9.53 Ø12.7 Ø9.53 Ø9.53 Ø9.53 Ø9.53
Length 10 10 10 5 5 10 15 5 5 4 3
W10 = 10 x 0.390 = 3.9, W11 = 10 x 0.28 = 2.8, W12 = 10 x 0.190 = 1.9
W13 = 5 x 0.120 = 0.6, W14 = (5+10+5+5+4+3) x 0.065 = 2.08, W15 = 0
Indoor Unit No 0 1 2 3 4 5
Corresponding
Power (HP)
5 5 5 5 5 5
Additional
Refrigerant
Quantity
Indoor Unit which do not require the additional
charge
W2 = 0
H1
£
50m (Position of outdoor unit is higher)
H1
£
40m (Position of outdoor unit is Lower)
Provide oil trap to gas line at every Ht meters lift
Outdoor Unit
Actual Lt
£
120m
Equivalent Lt
£
150m