61
Mechanical Tasks
Frequency
Records / Notes
1. With the water supply turned off, remove the screen from the strainer in
the combination inlet valve and clean off any dirt
Major Visit
2.With the water supply turned off and the hot water taps open, check the
expansion vessel charge pressure and top up as necessary
Major Visit
3. With the water supply turned on, open the temperature relief valve and
then the expansion valve to check unrestricted discharge into tundish. Check
valves for freedom of movement and confirm that the water stops and both
valves reseat correctly. Check at a full bore discharge from either valve that
there is no back up or discharge over the tundish.
Major Visit
4. Check that the correct outlet pressure is being maintained by the pressure
reducing valve by recording the pressure at the terminal fitting or the tapping
provided on the combination inlet valve.
Major Visit
5. Clean flow regulators (or restrictor/aerators) on each terminal fitting tap//
shower as applicable. Check for correct flow rate at terminal fittings.
Major Visit
6.If necessary de-scale the heat exchangers immersion/heaters in hard water
areas.
Major Visit
7. Check and clean the Boiler Buddy.
Major Visit
8. Open the primary/heating system safety valve and check that it discharges
safely.
Major Visit
9. Drop the primary/heating system pressure to zero
³
check and if necessary
top up the air side of the expansion vessel.
Major Visit
10. Check and if necessary top up the concentration of the heating system
Inhibitor.
Major Visit
11. Re-establish the primary/heating system pressure and disconnect the filling
loop.
Major Visit
12. Check the primary/heating system pressure does not rise above 2.5 bar
and the safety valve does not drip when the system is at full temperature.
Major Visit
13. Check and release any air from the primary/heating systems.
Major Visit
Electrical Tasks
1. Visually inspect, checking for the presence of supplementary bonding and
that it is being maintained.
Major Visit
2. Check correct rating and type of fuse is fitted on the electrical supply.
Major Visit
Controller Tasks
1. Check for the correct operation and temperature setting of the
thermostats.
Major Visit
2. Check the operation of the motorised valves.
Major Visit
Contractors Name
Engineers Name
Site Name
Site Number
Cylinder Maintenance
Maintenance Sheet
ENGINEERS FORMS
Table 3.6
62
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