Maintenance Guide - Panasonic WH-UD05JE5 Service Manual

18. Maintenance Guide

In order to ensure safety and optimal performance of the Tank Unit, seasonal inspections on the Tank Unit, functional
check of RCCB/ELCB, field wiring and piping have to be carried out at regular intervals. This maintenance should be
carried out by authorized dealer. Contact dealer for scheduled inspection.
1 Charging and Discharging the Water
Make sure all the piping installations are properly done before carry out below steps.
Charge the Water

For domestic hot water tank
a. Set the Domestic Hot Water Tank Discharge (Drain Tap) to "CLOSE".
b. Set all Tap / Shower "OPEN".
c. Start filling water to the Domestic Hot Water Tank via Tube Connector. After 20~40min, water should
flow out from Tap / Shower. Else, please contact your local authorized dealer.
d. Check and make sure no water leaking at the tube connecting points.

For Space Heating / Cooling
a. Turn the plug on the Air Purge Valve outlet anticlockwise by one complete turn from fully closed
position.
b. Set the Pressure Relief Valve lever "DOWN".
c. Start filling water (with pressure more than 0.1 MPa (1 bar)) to the Space Heating / Cooling circuit via
Tube Connector. Stop filling water if the free water flow through Pressure Relief Valve Drainage.
d. Turn ON the Tank Unit and make sure Water Pump is running.
e. Check and make sure no water leaking at the tube connecting points.
Discharge the Water

For domestic hot water tank
a. Turn OFF power supply.
b. Set the Domestic Hot Water Tank Discharge (Drain Tap) to "OPEN".
c. Open Tap / Shower to allow air inlet.
d. After discharge, set Domestic Hot Water Tank Discharge (Drain Tap) to "CLOSE".
2 Check Water Pressure
Water pressure should not lower than 0.05 MPa (with inspects the Water Pressure Gauge). If necessary add
water into Tank Unit (via Tube Connector).
"CLOSE"
Domestic Hot Water Tank Discharge (Drain Tap)
Air purge valve
Pressure relief valve
Lever
Turn down
Pressure relief valve
*(0.1 MPa = 1 bar)
"OPEN"
Plug (turn
anticlockwise by
one complete turn)
Pressure relief valve
Lever
or
Turn down
Pressure relief valve
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