Specifications

Stellar Service Instructions REV: D
Date of Issue: 14/09/2007
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5
PREVENTATIVE MAINTENANCE
TO BE DONE BY QUALIFIED PERSONS
It is suggested for peak performance that the water heater be serviced annually.
1. Check for discharge from the T&PR valve. Whilst the burner is off there should be no discharge of water. When
the burner is operating, a small discharge of water may be evident. Operate the valve-easing lever to ensure the
valve opens and resets properly. Always open and close the valve gently. The T&PR valve should be replaced at
5 yearly intervals.
2. Check that the pilot light is burning with a small blue flame. Remove and clean pilot burner if there is a tendency
for yellowing of the flame. Ensure the pilot ignites the main burner with no delayed ignition. Appliances operating
on LP gas may exhibit a slightly yellow pilot flame; this is a normal condition.
3. Check the main burner pressure is as stated on the Rating Plate. Pressure within 20% is acceptable. Remember
to replace test point screw.
4. Check main burner flame to ensure all parts ignite readily and that the flame is blue with little or no yellowing of
the tips. If necessary adjust primary air shutter to eliminate yellowing without inducing a harsh noisy blue flame.
5. Check operation of piezo igniter. The pilot should light after 2 or 3 operations of the piezo, if not, check for correct
spark gap, burnt electrode or cracked ceramic insulator.
6. Check operation of flame failure magnetic valve. The magnetic valve should be held open within one minute by
the electric current generated by the thermocouple. If not check the output of the thermocouple.
7. Check for signs of excessive corrosion on the jacket or inside combustion chamber.
8. Warn customer of the danger of using flammable materials or aerosol spray packs near the water heater.
Aerosols and harsh chemicals can cause premature failure of water heater components.
PRODUCT CHANGES
In June 2001 the entry for the gas supply pipe in the flue terminal was moved up to allow a straight connection to the
gas valve. The modified flue terminal will be the only type carried as a spare part. When replacing the flue terminal
with the old style gas connection it will be necessary to alter the pipe work to the gas valve before the replacement
flue terminal can be fitted. The replacement part number remains unchanged.
Thermocouple: The original T.S thermocouple had the thermal fuse mounted externally on the outer sheath of the
thermocouple encased in heat shrink (see diagram below). The current style of T.S. thermocouple has the thermal
fuse integrated inside the outer sheath of the thermocouple. A nickel coloured nut at the gas control end of the
thermocouple identifies this type of T.S. thermocouple. Non-T.S. thermocouples have a brass coloured nut.
Original T.S. thermocouple
Current T.S. thermocouple