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9. Refrigerant piping installation
9.1. Caution
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pipe thickness when selecting pipes.
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system.
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clean with a dry inert gas.
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piping during installation.
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bending radii as big as possible.
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Indoor twinning pipe kit model
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Line branch
Total indoor model
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Less than 30 in total
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Total heat source model
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Total heat source model
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branched sections are brazed.
Warning:
Do not use refrigerant other than the type indicated in the manuals
provided with the unit and on the nameplate.
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Always use extreme care to prevent the refrigerant gas from leaking while
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from any source, such as a gas stove, it breaks down and generates
a poisonous gas which can cause gas poisoning. Never weld in an
unventilated room. Always conduct an inspection for gas leakage after
installation of the refrigerant piping has been completed.
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Switch
No.
Operation
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Switch
No.
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Switch
No.
Operation
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The relay is closed while the compressor is in operation.
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The relay is closed when cooling or heating operation
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Switch
No.
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1
2
3
5
7
10
0
1
0
1
0
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1
0
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0
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heat source unit.
1. Power on the pump, motor valve, and unit.
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controller.
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allowable range.
Ensure that circulating water temperature is within the allowable range.
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in the system.
[Fig. 8.5.1] (P.4)
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A
Heat source unit
B
Motor valve
1
C
Tuning valve
1
D
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1
E
Flow switch
1
F
Water pipe
G
Power cable
H
Signal cable
I
Pump interlock
J
Operation ON signal
K
Opening command
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