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conditioner.
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To the heat source unit
CAP
To the heat source
unit
9
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When servicing, always
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0
Charge the system using liquid refrigerant.
a
Never use refrigerant to air purge.
Always evacuate using a vacuum
pump.
b
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d
Braze only with non-oxided material. Failure to do so may damage the
compressor. Braze using nitrogen purge.
Do not use any commercially available anti-oxidizing agent, because it
may cause pipe corrosion and degrade the refrigerant oil.
Contact Mitsubishi Electric for more details.
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Never perform piping connections when raining.
Warning:
When installing and relocating the unit, do not charge the system with any
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Caution:
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Do not use the tools shown below used with conventional refrigerant.
(Gauge manifold, charge hose, gas leak detector, check valve,
refrigerant charge base, vacuum gauge, refrigerant recovery
equipment)
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Manage tools used for R410A carefully.
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deteriorate.
Never use existing refrigerant piping.
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Store the piping to be used during installation indoors and keep both
ends of the piping sealed until just before brazing.
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Do not use a charging cylinder.
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Do not use special detergents to wash the piping.
9.2. Refrigerant piping system
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[Fig. 9.2.1]
(P.4, P.6 - 7)
Heat source model
Liquid side
Gas side
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Liquid pipe
Gas pipe
Model number
Downstream unit model total
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The 1st
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Heat source twinning kit
A
Heat source unit
B
1st branch
C
Indoor unit
D
Cap
E
Heat source twinning kit
F
Header
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[Fig. 9.2.2]
(P.5 - 7)
Heat source model
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Gas pipe
Model number
Downstream unit model total
Heat source twinning kit
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