29
14. Annual Servicing
A competent installer should carry out the following checks on an annual basis, ideally at the same
time as the annual boiler service.
1. The expansion relief valve on the inlet control set should be eased open allowing water to ow for 5 seconds. The valve should
then be closed making sure it resets correctly. Repeat this procedure with the pressure / temperature relief valve. Always ensure
that the discharge pipework is allowing the water to drain away adequately. If not check for blockages etc. and clear.
2. Ensure that the cylinder thermostat is working correctly and that it is controlling the water at a temperature of between 55°C and
65°C
3. Make sure the pressure in the Primary expansion vessel is charged to 3 bar. Turn off the water supply to the unit and open a
hot tap rst. The valve on the expansion vessel is a Schrader (standard car tyre) type. Air or CO2 can be used to pressurise the
expansion vessel.
4. Remove the head on the inlet control set by unscrewing, and clean the mesh lter within.
5. The benchmark service record supplied within this manual should be updated at each service.
6. Make sure the pressure in the Secondary expansion vessel is charged to 1.5 bar. De-pressurise the heating circuit before checking
& altering the pre-charge pressure.
7. Clean the central heating circuit magnetic lter by isolating and draining the boiler then removing the Hex-head cap.
8. Ensure the central heating circuit is lled to 1.5 bar.
SERVICING MUST BE CARRIED OUT ANNUALLY & SHOULD ONLY BE CARRIED
OUT BY COMPETENT INSTALLERS AND ANY SPARE PARTS USED MUST BE
PURCHASED FROM EHC. NEVER BYPASS ANY SAFETY DEVICES OR OPERATE
THE UNIT WITHOUT THEM FULLY OPERATIONAL.
YOUR GUARANTEE MAY BE VOID WITHOUT PROOF OF ANNUAL SERVICING.
THE COMMISSIONING CERTIFICATE SUPPLIED AT THE REAR OF THIS MANUAL
SHOULD ALSO BE COMPLETED BY THE INSTALLER.
To Next Page
Loading...
