Panasonic WH-MXF09D3E5, Service Manual

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11.3. Piping Installation
Please engage a licensed water circuit installer to install this
water circuit.
• The minimum requirement of water in the system is 50 litres.
If this value could not be achieved, please install additional
buffer tank (field supply).
• This water circuit must comply with relevant European and
national regulations (including EN61770), and local building
regulation codes.
• Ensure the components installed in the water circuit could
withstand water pressure during operation.
• Do not apply excessive force to piping that may damage the
pipes.
• Use Rp 1 ¼” nut for both water inlet and water outlet
connection and clean all piping with tap water before install.
• If existing tank is to be connected to this Mono bloc unit,
ensure the pipes are clean before water pipe installation is
carried out.
• Must install an external filter (30 mesh or more, field supply)
before water inlet of Mono bloc unit (with “WATER IN” indica-
tion).
• Choose proper sealer which can withstand the pressures
and temperatures of the system.
• Make sure to use two spanners to tighten the connection.
Further tighten the nuts with torque wrench in specified
torque as stated in the table.
• Refer to Diagram 3.1 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.
• If non-brass metallic piping is used for installation, make
sure to insulate the piping to prevent galvanic corrosion.
• Do not use pipes that are crushed or deformed. If these
inferior pipes are used, it may cause unit malfunction.
• Make sure to insulate the water circuit piping (insulator
thickness : 20mm or more) to prevent reduction of heating
capacity, as well as avoid freezing of the outdoor water
circuit piping during winter season.
• After installation, check the water leakage condition in
connection area during test run.
• In case of a power supply failure or pump operating failure,
drain the system (as suggested in the figure below).
When water is idle inside the system, freezing up is very
likely to happen which could damage the system.
Drainage piping installation
• Use a drain hose with inner diameter of 15 mm.
• The hose must be installed in a continuously downward
direction and left open to the frost-free atmosphere.
• If drain hose is long, use a metal support fixture along the
way to eliminate the wavy pattern of drain tube.
• The water may drip from this drain hose. Therefore must
guide the hose without close or block the outlet of the hose.
• Do not insert this hose into sewage hose or cleaning hose
that may generate ammonia gas, sulfuric gas, etc.
• If necessary, use a hose clamp to tighten the hose at drain
hose connector to prevent it from leaking.
This section is for authorized and licensed electrician / water system
installer only. Work behind the front plate secured by screws must only
be carried out under supervision of qualified contractor, installation
engineer or service person.
Model
Nut size (Torque)
Water
WH-MXF09D3E5
Rp 1 1/4" [117.6 N•m]
WH-MXF12D6E5