Page 26 of 32
Fig. 19
5.3.5.4 Upon obtaining the correct burner setting pressure switch off the electricity supply to the appliance, remove
the screwdriver, replace the plug into the boss in the control box door and open the door. Remove the
manometer tube from the RIGHT (Gas OUT) Control Valve test nipple and screw in the test nipple sealing
screw. Close the control box door and secure it with the two toggle latches.
5.4
Flame Supervision
5.4.1
To check the operation of the flame supervision equipment, run the appliance normally, turn off the gas
supply at the gas isolation valve and observe that the amber neon indicator remains illuminated after the
burner flame is extinguished (2 seconds)
5.4.2
After a purge period of 10 seconds (minimum) the solenoid valves and the ignition spark electrode will be
re-energised and with the gas still turned off, the ignition control will go to "lockout" condition after a further
12 seconds (maximum). Observe that the amber neon indicator is extinguished.
5.4.3
Switch off the electricity supply to the appliance for a per iod of 10 seconds before attempting to re-ignite the
burner. (See section 5.1.10).
5.5
Air Proving Switch
5.5.1
With the appliance running normally, disconnect the DIN type socket from the electrical plug mounted on
the Terminal Box attached to the Fan Adaptor. The burner should extinguished within 3 seconds.
5.5.2
Leave the DIN type disconnected for 30 seconds to ensure that there is no attempt at re-ignition.
5.5.3
Switch off the electrical supply to the appliance and re-connect the DIN type socket to the electrical plug
mounted on the terminal box attached to the Fan Adaptor.
6.
SERVICING
It is essential that at least once a year, preferably before the heating season, a qualified person services
the appliance. In exceptionally dirty conditions, such as may occur in a foundry, more frequent servicing
may be desirable.
IMPORTANT:-
1.
Do not rest anything, especially ladders, against the appliance.
2.
Gas and Electricity supplies must be isolated before commencing servicing work or
replacement of components.
3.
Unless instructed to the contrary, re-assemble components in reverse order.
4.
Check all joints for gas soundness after carrying out any servicing of the appliance.
5.
On completion of a service/fault finding task which has required the breaking and remaking of
electrical corrections, the following checks, using a multimeter must be made.
5.1
Earth continuity check
5.2
Polarity check
5.3
Resistance to earth check
Pressure Governor Adjuster
Pressure Test Nipple
RIGHT (Gas Out)
Manometer Tube
Manometer
Test Nipple
Pressure Test Nipple
Left (Gas In)
