Piping Installation - Panasonic WH-MDC012H6E5 Service Manual

Disposal of Mono Bloc Unit Drain Water

When a Drain elbow is used, please ensure to follow below:
The unit should be placed on a stand which is taller than 50mm.
o
Cover the 8 holes (ø20mm) with Rubber cap (refer to illustration below)
o
Use a tray (field supply) when necessary to dispose the Mono bloc unit drain water.
o

If the unit is used in an area where temperature falls below 0°C for 2 or 3 consecutive days, it is recommended
not to use the Drain elbow and Rubber cap, for the drain water freezes and the fan will not rotate.

Piping Installation

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.

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 1¼" 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.

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 : 20mm or more) to prevent condensation
during cooling operation 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).
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.

Water will drip from this hose, therefore the outlet
of this hose must be installed in an area where the
outlet cannot become blocked.
Rubber cap
H
< H
Drain elbow 1
2 x 8
WARNING
Do not over tighten, over tightening cause water leakage.

Do not insert this hose into sewage or drain pipe
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.
CAUTION
Drain hose
connector
Drain hose
Illustration of how to fix
drain hose to Mono bloc unit