Form
483S
Rev
Jan
09
Page 47 of 53
7.3.5.4 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 upper surface of 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.
7.4
Flame
Supervision
7.4.1
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.
7.4.2
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). Amber neon indicator extinguished.
7.4.3
Switch off the electricity supply to the appliance for a period of 10 seconds before attempting to re-ignite the
burner. (see section 7.1.10).
7.5
Air Proving Switch
7.5.1
With the appliance running normally, disconnect the 3 pin electrical plug on the fan leads from the electrical
socket (marked ) mounted in the side of the Control Box. The burner should extinguish within 3 seconds.
7.5.2
Leave the Fan disconnected for 30 seconds to ensure that there is no attempt at re-ignition.
7.5.3
Switch off the electricity supply to the appliance and re-connect the electrical plug on the fan leads to the socket
(marked ) mounted in the side of the Control Box.
8. SERVICING
It is essential that at least once a year, preferably before the heating season, a qualified person service 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
8.1
Fan
8.1.1
Disconnect the electrical plug on the fan leads from the socket (marked ) mounted in the side of the
Control
Box.
8.1.2
If a flued installation, disconnect the flue from the Fan.
8.1.3
Slacken the nuts of the Torctite Coupling securing the Fan Connector to the Radiant Tube and draw the Fan
Assembly off the Radiant Tube.
8.1.4
Inspect the main impeller and secondary cooling impeller and remove any dust by brushing with a soft brush.
Check that the impeller rotates freely and that there is no excessive play in the bearings. The bearings are pre-
lubricated and require no attention.
Summary of Contents for CBU09
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