andrews RFF 13/175, Installation And Service Manual

Page: 32 / 58

6.2 Burner Assembly
6.2.1 The burner assembly should be cleaned and
checked annually
1. Move the gas service cock to "OFF". Isolate from the
electrical supply. Unhook and remove the outer door.
2. Disconnect from the bottom of the gas control valve, the pilot
tube, gas control wiring loom.
3. Remove the 6 retaining screws from the burner plate and
withdraw the burner assembly from the heater complete with
blue ignition lead.
4. Remove the screw securing the pilot assembly to the main
burner supply tube.
5. Remove the gland nut connecting the pilot tube to the pilot
assembly. Withdraw the pilot tube and remove the pilot
restrictor from the end. Clean the pilot restrictor and blow
through the pilot burner with compressed air.
DO NOT ATTEMPT TO CLEAN ORIFICES OR MAIN
BURNER SURFACE WITH SHARP METALLIC OBJECTS.
6. Re-assemble in the reverse order of steps 2 to 5 but note:
i) Be sure to engage the flattened flange of the main burner
into the proper location in the bracket on the base pan of
the heater.
7. Re-light and carry out commissioning check.
See
See section 4 commissioning.
32 Issue 4 21042018