unvented hot water cylinders
installation and maintenance instructions
Page 10 / 17
SERVICING
GENERAL
Servicing should only be carried out by competent installers and any spare parts used must be purchased from JOULE.
NEVER bypass any safety devices or operate the unit without them being fully operational.
DRAINING
Switch the electrical power off (important to avoid damage to element). Isolate boiler from the unit. Turn off the cold water
supply valve. Open hot water tap. Open the drain valve. The unit will drain.
WARNING: WATER DRAINED OFF MAY BE VERY HOT!
ANNUAL MAINTENANCE
The water heaters require annual servicing in order to ensure safe working and optimum performance. It is essential that the
following checks are performed by a competent installer on an annual basis. This is commonly done at the same time as the
annual boiler service.
1) Twist the cap of the expansion relief valve on the inlet control set and allow water to flow for 5 seconds. Release and
make sure it resets correctly. Repeat with the pressure / temperature relief valve. In both cases check that the
discharge pipework is carrying the water away adequately. If not, check for blockages etc. and clear.
WARNING: THE WATER DISCHARGED MAY BE VERY HOT!
2) Check that any immersion heaters fitted are working correctly and that they are controlling the water at a
temperature between 55°C and 65°C.
3) Check the pressure in the expansion vessel is charged to 3 bar. Turn off the water supply to the unit and open a hot
tap first. The air valve on expansion vessel is a Schrader (car tyre) type. Air or CO2 may be used to charge the expansion
vessel.
4) Unscrew the head on the inlet control set and clean the mesh filter within.
5) The Service Log Book supplied with this unit should be updated at each service.
YOUR GUARANTEE MAY BE VOID WITHOUT PROOF OF SERVICE AFTER FIRST YEAR.
SPARE PARTS
A full range of spare parts is available.
To Next Page
Loading...