Panasonic WH-SHF09D3E5, Service Manual

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33
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Install external filter (30 mesh or more, field supply)
before water inlet of indoor unit (with “WATER IN”
indication).
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Refer to Diagram 4.1 for pipe connection of Panel
Heater, Floor Heater, Tank Unit, Solar Pump
Station, 3-way Valve Kit and etc. Fail to connect the
pipes appropriately might cause the unit malfunction.
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Be sure to use two spanners to tighten the
connection. Further tighten the nuts with torque
wrench in specified torque as stated in the table.
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If non-brass metallic piping is used for installation,
make sure to insulate the pipes to prevent galvanic
corrosion.
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Make sure to insulate the water circuit pipes to
prevent reduction of heating capacity.
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After installation, check the water leakage condition
in connection area during test run.
Nut size (Torque)
Model
Water
(SHF09D3E5/UH09DE5,
SHF12D6E5/UH12DE5)
Rp 1 1/4” [117.6 N•m]
CAUTION
Do not over tighten, over tightening cause gas leakage.
11.3.3.3 Indoor Unit Refrigerant Pipe
Installation
1 Please make flare after inserting flare nut
(located at joint portion of tube assembly) onto
the copper pipe. (In case of using long piping)
2 Do not use pipe wrench to open refrigerant
piping. Flare nut may be broken and cause
leakage. Use proper spanner or ring wrench.
3 Connect the piping:
o
Align the center of piping and sufficiently
tighten the flare nut with fingers.
o
Further tighten the flare nut with torque
wrench in specified torque as stated in the
table.
Piping size (Torque)
Model
Gas Liquid
SHF09D3E5/UH09DE5,
SHF12D6E5/UH12DE5
ø15.88mm (5/8”)
[65 N•m]
ø 9.52mm (3/8”)
[42 N•m]
CAUTION
Do not over tighten, over tightening cause gas leakage.
11.3.3.4 Drain Hose Installation
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Use inner diameter 15 mm drain hose in the market.
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This hose must to be installed in a continuously
downward direction and in a frost-free environment.
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Do not insert this hose into sewage hose or
cleaning hose that may generate ammonia gas,
sulfuric gas, etc.
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If necessary, use hose clamp to further tighten the
hose at drain hose connector to prevent leakage.
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The water may drip from drain hose. Therefore
must ensure the outlet of the hose is always not
closed or blocked.