15
14.0 SERVICING
Important Notes:
The appliance area must be kept clear and free from combustible materials, flammable vapour and liquids.
The flow of combustion and ventilation air must not be obstructed.
Servicing the heater is recommended once a year. Servicing consists of removing dust from the heater generally,
cleaning the burner, examination of the flueing system, checking for gas soundness, and checking the operation of the
heater.
Turn off the gas supply before commencing any servicing. Always test for gas soundness after servicing or exchanging
any component, with the gas shut off tap in the ON position.
Only use official Robinson Willey spare parts.
14.1
Removing Outer Case (Fig 15.)
(a) Remove the outer case by lifting it up and away from the locating hooks.
(b) Ensure that the control knob is at its OFF position.
(c) Remove the two control knob securing screws and remove the control knob.
(d) Remove the four infill frame securing screws and remove the infill frame.
(e) Remove the lower air guide (Fig 4.).
(f) Remove the Right hand side air guide.
(g) Refitting is the reverse procedure of removal.
14.2
Removing The Control Assembly
(a) Remove the outer case as previously described in Section 14.1.
(b) Remove the thermocouple as described in Section 14.8.
(b) Disconnect the following nuts (see Fig 16):-
(i) Both the main injector supply pipe connections.
(ii) The thermocouple connection.
(iii) The ignition electrode securing nut.
(iv) Pilot supply tube connection (taking care not to lose the
injector which is hooked onto the olive crimped onto the
gas supply pipe, see Fig 14).
(v) Inlet elbow connection.
(c) Disconnect the red and blue wires from the ignition unit.
(d) Remove the three mounting screws (see Fig 17).
(e) Remove the control assembly.
(f) Refitting is the reverse procedure of removal.
Fig 15.
Outer Case
Infill Frame
Fig 14.
Pilot Injector
Olive
Pilot Body
Pilot Gasket
Pilot Gas
Supply Pipe
Pilot Tube Nut
(v)
(i)
(iv)
(iii)
Fig 16.
(ii)
