Servicing the Unit
(See 'BOILER SERVICING GUIDE' label on the boiler)
For economy and safety reasons, it is important to service the appliance regularly.
1) Turn off the electrical supply to the boiler.
2) Remove the front panel of the outer case by pulling forwards at the top and lifting upwards.
3) Lift trim on flue pipe connection clear of the top panel and remove the top panel of the outer
case by pulling upwards.
4) Turn off the gas supply at the service tap and disconnect the union (
).
5) Disconnect the electrical socket by pulling upwards (
).
6) Remove the four wing nuts and carefully withdraw the burner and controls assembly (
).
7) Release the two screws securing the front insulation assembly and remove the assembly (
8) Remove the four thumb screws securing the top inspection panel (
).
9) Clean the fins of the heat exchanger with a stiff bristle brush. Clean out any deposits that have
collected in the bottom of the combustion box ensuring that the two air openings in the base are
clear.
10) Remove any debris that may have collected under the combustion box.
11) Check all the insulation panels for damage, replace if necessary. Refit the front insulation
panel, the top inspection panel.
12) 80, 70 OF ONLY Clean the burner as follows:
a) Pull and release the lint arrester from the front of the combustion box panel held in position by
two spring clips. This can be cleaned by thoroughly washing and then allowed to dry.
b) Remove the two nuts securing the burner tie plate to the burners (
).
c) Remove the burners by removing the securing screws (2 per burner) (
).
d) Remove the split pin on each burner manifold and twist each burner in the direction shown (
) to release the bayonet fitting and withdraw the venturi unit. Clear away any lint or deposits
which may have accumulated inside the burners. Refit the venturi sections ensuring that the
gaskets are not damaged. Refit the split pins.
e) Remove the injectors from the inlet manifold, clean carefully and replace.
13) 60, 50, 40 OF ONLY Clean the burner as follows:
a) Pull and release the lint arrester from the front of the combustion box panel held in position by
two spring clips. This can be cleaned by thoroughly washing and then allowed to dry.
b) Disconnect the burner by removing the 3 securing screws (
).
c) Remove the end flange assembly of the burner which is secured in position by a single screw
together with 1 washer. Clear away any deposits which may have accumulated on the gauze or
inside the burner. Refit the end flange taking care that the gasket is not damaged and that the
washer is replaced (
).
Summary of Contents for BOSTON 40 OF
Page 9: ...fig 1 Pump in Casing Page 5 fig 2 Outer Case ...
Page 15: ...Page 8 Fig A One Zone Valve Fully Pumped System ...
Page 16: ...Fig B Sundial Gravity System ...
Page 17: ...Fig C 2 Zones Valve Fully Pumped System ...
Page 20: ...fig 7 Burner Controls fig 8 Boiler Thermostat Page 10 ...
Page 23: ...Fig 9 Insulation Combustion Box Door Fig 10 Baffle Securing Screws ...
Page 24: ...fig 11 Door Burner 60 50 40 fig 12 Door Burner 80 70 ...
Page 29: ...fig 16 Insulation Page 14 Short Parts List ...
Page 30: ......