Panasonic WH-ADF0309J3E5CM Service Manual page 63

Model
Tank Unit Outdoor Unit
WH- CU-
ADF0309J3E5CM 2WZ71YBE5
(B) Domestic Hot Water Tank Pipework

It's strongly recommended to install an expansion
vessel (field supply) in the Domestic Hot Water
Tank circuit. Refer Typical Piping Installation
section to locate the expansion vessel.
Recommended pre-charge pressure of the
o
expansion vessel (field supply) = 0.35MPa
(3.5 bars)

In high water pressure or water supply is above
500kPa, please install the Pressure Reducing
Valve for water supply. If the pressure higher than
that, it might damage the Tank Unit.

A Pressure Reducing Valve (field supply) with
below specification is strongly advised to be
installed along the line of the tube connector
of Tank Unit. Refer Typical Piping Installation
section to locate both of these valves.
Recommended Pressure Reducing Valve
specifications:
Set pressure: 0.35 MPa (3.5 bars)
-

Must connect a faucet to Tank Unit Tube
○
Connector d and main water supply, in order to
supply water with appropriate temperature for
shower or tap usage. Failure to do so might cause
scalding.

Failure to connect the tube appropriately might
causing the Tank Unit malfunction.
(C) Drain Elbow and Hose Installation

Fix the Drain Elbow
bottom of Drain Water Hole
Packing 3
Drain Elbow 2

Use inner diameter 17 mm drain hose in the
market, fix to Drain Elbow

This hose must to be installed in a continuously
downward direction and in a frost-free
environment. Improper drain piping may cause
water leakage hence damage the furnitures.

If drain hose is long, use a metal support fixture
along the way to eliminate the wavy pattern of
drain tube.

Guide the drain hose to outdoor as illustrated.
Rated Flow Rate (l/min)
Heat
22.9
□ □
2 and Packing 3 to the
○
h .
□
2 & Drain Elbow

Do not insert this hose into sewage or drain pipe
that may generate ammonia gas, sulphuric 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.
○
c
(D) Domestic Hot Water Tank Discharge (Drain
Tap) and Safety Relief Valve Pipework

Safety Relief Valve 0.8MPa (8 bars) incorporated
in Domestic Hot Water Tank.

Drain Tap and Safety Relief Valve discharge
fittings share the same drainage outlet.

Use R½" male connector for this drainage outlet
connection (Tube connector

Piping must always be installed in a continuously
downward direction. It must not be longer than 2m,
with no more than 2 elbows, and must not allow
condensation to build up or freezing to occur.

The pipe from this drainage outlet fitting must not
be shut off. The discharge must be freed.

The end of this pipework must be in such a way
so that the outlet is visible and can not cause any
damage. Keep away from electrical components.

It is recommended to fit a tundish into this
pipework. Tundish should be visible and
positioned away from frost environment and
electrical components.
○
i .
63
Discharge below
fixed grating
Fixed grating
Trapped gulley
Possible wall
Illustration of guide
drain hose to outdoor
○
g ).
○
g