Servicing; Introduction; Burner Assembly; The Burner Assembly Should Be Cleaned And Checked Annually - andrews RSC 150 Installation And Service Manual

6

Servicing

6.1

Introduction

6.2

Burner assembly

E104 Issue 2 14/07/16
6.1.1 Servicing must be carried out by a properly
qualified person.
Whilst giving the following instructions for the care of the
Andrews Water Heater, we would recommend that an
arrangement is made with your local gas region or installer to
carry out periodic checks of the appliance to ensure trouble free
operation and continued satisfaction.
6.2.1 The burner assembly should be cleaned and
checked annually
1. Depress slightly the gas control knob and turn to "OFF".
Remove the outer burner cover and the inner door. Remove
the IO fixing screws to remove the inner cover.
2. Disconnect from the bottom of the control valve the 'pilot
tube, thermocouple and main burner supply tube. Withdraw
the burner assembly from the heater.
3. Remove the screw securing the pilot assembly to the main
burner.
4. 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 with acetone
and blow through the pilot burner with compressed air.
5. Remove the two screws securing the main burner supply
tube to the bottom of the burner to gain access to the main
jet. Remove the main jet and clean with acetone. Blow
through the main burner with compressed air.
DO NOT ATTEMPT TO CLEAN ORIFICES WITH SHARP
METALLIC OBJECTS, IF NECESSARY, USE A WOOD
SPLINTER TO CLEAR.
6. Re-assemble in the reverse order of steps 2 to 5 but note:
i) Be sure to engage the rear section of the main burner
supply pipe in its location bracket on the base pan of
the heater.
ii) DO NOT OVERTIGHTEN THE THERMOCOUPLE
CONNECTION, SCREW IN FINGER TIGHT AND
TIGHTEN A FURTHER 1/4 TURN USING A
SPANNER.
7. Turn the control knob to "PILOT" and depress. Using a leak
detection fluid check the joints at both ends of the pilot
supply tube. Seal if necessary.
8. Allow 3 minutes for any unburnt gas to disperse and light the
pilot flame, check that the flame is correct, see Fig. 10 and
turn the control knob to 'ON', the main burner will light.
9. Check the main burner tube connection at the control valve
with leak fluid and seal if necessary. Replace the outer cover.
Servicing 6
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