Panasonic WH-MHF09G3E8, Руководство по обслуживанию

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11.3 Piping Installation
WARNING
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.
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
connecting to the Mono bloc unit.

Cover the pipe end to prevent dirt and dust when inserting it through a wall. If an existing tank is to be connected
to this Mono bloc unit, ensure the pipes are clean before water pipe installation is carried out.

An external filter (30 mesh or more field supplied) must be installed before the water inlet of the Mono bloc unit.

Refer to Diagram 3.1 for pipe connection of Radiator, Floor Heater, Tank Unit, Solar Pump Station, 3-way Valve
Kit and etc. Fail to connect the pipes appropriately might cause the unit malfunction.
Diagram 3.1: Typical Water Piping Installation
Room Thermostat
(Field supply)
3-way Valve Kit
(Complete with Tank Unit)
Radiator /
Floor Heater
Water
Outlet
Water Inlet
Mono Bloc Unit
External Filter
(Field supply)
Tank Unit
3-way Valve
Kit (Field
supply)
Solar Pump
Station
(Field supply)

Choose proper sealer which can withstand the pressures and temperatures of the system.

Make 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 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 : 20 mm or more) to prevent condensation
during cooling operation (cooling model only) and 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).
H
< H
When water is idle inside the system, freezing up is very likely to happen which could damage the system.