Hitachi FSG Series, Технический каталог

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REFRIGERANT PIPING AND REFRIGERANT CHARGE
13
/37
ITEM LINE BRANCH UNI-PIPING 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
£
100 m
Maximum Piping
Length
Equivalent Length
Lt
£
125 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
£
30 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
RAS-10FSG Use E-102ME1 at "a, b, c, d and e"
RAS-8FSG Use E-82ME1 at "a, b, c, d and e" Choice of each Multi-kit
RAS-5FSG Use E-52ME1 at "a, b, c, d and e"
Liquid Line
Example: In case of RAS-8FSG
W13 = 51 x 0.120 = 6.1
W15 = (5+3+5+3+5+3) X 0.026 = 0.6
Indoor unit
W2 = 1.4
Quantity of Additional Refrigerant Charge
The quantity is calculated by the following
equation:
W (kg) = W11+W12+W13+W14+W15+W2
1) W11 (kg): (Total Length (m) of Ø19.05
Liquid Piping) x 0.300
W12 (kg): (Total Length (m) of Ø15.88
Liquid Piping) x 0.195
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 = W11 + W12 + W13 + W14 + W15 + W2
= 6.1 + 0 + 0.6 + 1.4 = 8.1 kg
H1
£
50m (Position of outdoor unit is higher)
H1
£
40m (Position of outdoor unit is Lower)
Outdoor Unit
Provide oil trap to gas line at
every Ht meters lift
Actual Lt
£
100m
Equivalent Lt
£
125m
Mark
Lt+L-
(L2+L4)
L0 L1 L2 L3 L4 L5
Size Ø12.7 Ø6.35 Ø6.35 Ø6.35 Ø6.35 Ø6.35 Ø6.35
Length 71 5 3 5 3 5 3
Indoor Unit No 0 1 2 3 4 5
Corresponding
Power (HP)
1 1 2 2 2 2
Additional
Refrigerant
Quantity
Indoor Unit which do not require the
additional charge
1.4