andrews L24/31, Installation Manual, Operation And Service Manual

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Magnesium sacrificial anode(s) is (are) fitted to the top of the storage vessel.
The anode(s) will prevent corrosion of the storage vessel. Anode condition should be
checked annually and replaced if excessive wear is present.
1. Withdraw each anode using a 11/16in AF socket spanner. A new anode measures
21mm diameter.
2. An anode should be replaced, if, at any point along it's length, the diameter is reduced
to half, or less of original. Particular attention should be paid to the ends.
3. If the anode is encrusted with limescale, it should be either wire brushed to reveal
bright metal or replaced.
Where Correx TM anodes are fitted, no maintenance is necessary.
Check the condition and operation of the safety valve as described below.
During Servicing
Examine the safety valve for deposits or let-by. Clean or replace as necessary.
When Re-Commissioning
Operate the safety valve, ensuring no let-by when the valve is reset and reseated.
NOTE! For adjustable valves, reduce the rating until the valve operates and gives full flow.
Reset the valve and check for let-by. For lever operation valves, operate lever and check
for let-by when reseated.
Re-light and carry out commissioning checks as detailed in Section 4, Commissioning.
Set the thermostat control to the required user setting.
MAGNESIUM
ANODE(S)
ALL MODELS
SAFETY
VALVE
HI-FLO RANGE
RESTART
ALL MODELS
SERVICING SECTION 6
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