Hitachi RAM-160FSPH Instruction Manual page 8

Piping Connection Example:
These figures show example of 6 indoor units
combined with 1 outdoor unit.
The refrigerant pipes are shown as single line in the
diagrams.
However, liquid line piping and gas piping are
required in the field piping work.
Total piping Length：Lt+ L0 + L1+ L2+ L3+ L4
Maximum Piping
Length (Actual Length):
Lt
Maximum lift between
Outdoor unit and Indoor
unit：H1
Maximum Lift between each indoor unit：H2
Maximum Lift between multi-kit and indoor unit：H3
Piping Length between
multi-kit and indoor unit
Selection of Multi-kit
Additional Refrigerant Charge
This Outdoor unit is filled with R410A refrigerant
Please calculate the amount of refrigerant as follows：
W(kg) = W +W
11 12
：Φ9.53Total Length of Liquid Pipe(m)0.05(kg)
W
11
：Φ6.35Total Length of Liquid Pipe (m)0.02(kg)
W
12
Additional maximum filling capacity：8.0(kg)
Common Considerations
From The outdoor unit to the
indoor unit's piping length
When the outdoor unit is
higher than the indoor unit
When the outdoor unit is lower
than the indoor unit
Between multi-kit and
farthest indoor unit：L
Between each multi-kit and
each indoor unit
：L0、L1、L2、L3、L4、L5
the
"a ~ e" UseE-NP282S
〈Calculation Example〉
The pipe diameter and length of each piping are as
follows:
Mark Lt-L5
Liquid
Φ
Diameter 9.53
Piping
Section
Length 21
W =210.05=1.05
11
=(5+3+5+3+5+3) 0.02=0.48
W
12
W=W +W =1.05+0.48=1.53(kg)
Total
11 12
1. The piping length and piping path of the liquid and gas
pipes should be the same.
2. The multi-kit should be constructed near the indoor unit.
8
Lt
Within 300m
190 (150) m
50m
40m
15m
5m
40m
15m
L0 L1 L2 L3 L4
Φ Φ Φ Φ Φ
6.35 6.35 6.35 6.35 6.35
5 3 5 3 5
L5
Φ
6.35
3