Panasonic WH-SDC12F6E5 Service Manual page 50


An external filter (30 mesh or more, field supplied)
must be installed before the water inlet of the indoor
unit (with "WATER IN" indication).

Refer to Diagram 4.1 for pipe connection of
Radiator, Floor Heater, Tank Unit, Solar Pump
Station, 3-way Valve Kit, 2-way Valve Kit and etc.
Fail to connect the pipes appropriately might cause
the unit malfunction.
Room Thermostat (Field Supply)
Panasonic
Air-to-Water
Heatpump
Indoor Unit
Water Inlet
Water
Outlet
External Filter
(Field Supply)
Solar Pump
Station
(Field supply)
Diagram 4.1: Typical Water Piping Installation

Be sure to use two spanners to tighten the
connection. Tighten the nuts with torque wrench:
117.6 N•m.

If non-brass metallic piping is used for installation,
make sure to insulate the pipes to prevent galvanic
corrosion.

Make sure to insulate the water circuit pipes to
prevent reduction of heating capacity.

After installation, check the water leakage condition
in connection area during test run.
Do not over tighten, over tightening cause water leakage.
12.3.3.3 Insulation

Mount the PS foam
inlet and outlet connectors, as shown in below illustration.
7
PS Foam
Water Connector
Long Banding Strap
Space cooling can be achieved
through the fan coil unit ONLY.
Make sure the fan coil unit is
installed in the cooling circuit.
3-Way Valve Kit
(Complete with
Tank Unit)
3-Way
Valve Kit
(Field
Do not install radiator /
supply)
fl oor heater in the
cooling circuit.
Fail to do so might
cause radiator / floor
heater malfunction.
Tank Unit
Water Outlet
Water Inlet
CAUTION
and long banding strap
7
PS Foam
Water Connector
8
12.3.3.4
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
o
Fan Coil Unit
Radiator/ Floor
Heater
WH-SDC14/16F6E5
WH-UD14/16FE5
Do not over tighten, over tightening cause gas leakage.
12.3.3.5

Use inner diameter 15 mm drain hose in the market.

This hose must to be installed in a continuously
downward direction and in a frost-free environment.

Guides this hose's outlet to outdoor only.

Do not insert this hose into sewage or drain pipe
that may generate ammonia gas, sulfuric gas, etc.

If necessary, use hose clamp to further tighten the
hose at drain hose connector to prevent leakage.

Water will drip from this hose, therefore the outlet of
this hose must be installed in an area where the
outlet cannot become blocked.
to water
50
Indoor Unit Refrigerant Pipe
Installation
Align the center of piping and sufficiently
tighten the flare nut with fingers.
Further tighten the flare nut with torque
wrench in specified torque as stated in the
table.
Piping size (Torque)
Model
Gas
ø15.88 mm
(5/8")
[65 N•m]
CAUTION
Liquid Refrigerant Pipe
Drain Hose Installation
Drain hose
connector
Drain hose
Drain water outlet
Liquid
ø9.52 mm
(3/8")
[42 N•m]
Gas Refrigerant
Pipe