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Servicing Section
SERVICE SECTION
Maintenance
GENERAL
To ensure safe and efficient operation of the appliance, it is recommended that the servicing is carried out at
regular intervals, the frequency of which will vary depending on the condition of installation and usage: once every
year will be adequate.
Servicing must be undertaken by a competent person, such as a service engineer.
Refer to Short Parts List when ordering spares.
Before undertaking any work on the appliance - switch off the electrical supply at the external isolator.
BURNER TRAY REMOVAL & DISASSEMBLY
You may need to inspect and repair the parts of the heater that allows the gas to flow from the gas supply line into
the burners.
1. Turn off gas supply.
2. Isolate the electrical supply.
3. Remove the gas line, flanged onto the gas valve.
4. Remove gas valve holding bracket.
5. Remove gas valve wires.
6. Disconnect the ignition wiring.
7. Remove burner manifold fixing screws and draw out the burner tray.
8. Check the main burner orifices and check for any blockage.
9. Check thermocouple (Millivolt only) for deterioration and replace if necessary.
10. Remove the pilot orifice and clean it. (Do not use any sharp object! It will destroy the designed orifice size!)
11. After all control devices have been removed, clean manifold.
12. Reassemble in reverse. Reestablish gas, water and electrical supplies.
13. Check water tightness, gas soundness and electrical continuity.
If the heater has been off for the winter or has been installed, but not fired for an extended period of time,
insects will crawl into these orifices and the pilot orifice and prevent the heater from firing.
Installation of the high tension ignition wire is very important when reassembling the burner tray into the heater.
The ignition wire must be placed onto the assembly tightly and completely to assure proper spark at the electrode
during heater start-up.
If the ignition wire is not on to the assembly all the way, with a tight connection, the spark will be erratic and the
sequence and subsequent gas valve will be interrupted.
P/N 471438
NOTE
NOTE
19
Rev. A 2-4-2000
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