Baxi Potterton Gold FSB 30 HE To it Fig, Remove the gas injector pipe from the gas valve, Base

Flue Sampling Point

Fig. 41a

Injector Pipe

Injector Pipe Retaining

Screw

14.0Servicing the Boiler

14.2Annual Servicing - Inspection (Cont)

7.To clean the heat exchanger and burner proceed as follows:

a)Disconnect the electrical leads to the fan component protection sensor (Fig. 42).

b)Loosen the screw retaining the gas injector pipe at the venturi (Fig. 42).

c)Undo the two wing nuts to disconnect the fan

(Fig. 42).

d) Remove the fan and disconnect the electrical supply

to it (Fig. 42).

e) Remove the gas injector pipe from the gas valve

(push-fit) (Fig. 42).

f) Remove the condensate trap drain plug and place a

vessel underneath to catch the condensate (care should

be taken as this could be hot). The condensate drain

pipe may be removed to increase access.

Protection

Sensor Leads

Securing Nut

Fan

Sensor

Leads

Electrical Supply

g) Undo the condensate trap securing nut, lock nut and

the condensate drain pipe. Remove the condensate trap

and disconnect the sensor leads (Fig. 43). Clean the trap

and refit the drain plug.

h) Remove the two screws securing the burner and

remove the burner. Visually inspect the internal burner

baffle for obstruction, check seal around baffle for

cracks/damage. Clean with a soft brush.

		Condensate
Fig. 42	Wing Nuts	Trap

Lock Nut

Service Drain

Plug

Central Insulation Panel	Trap to Condensate
	Pump Inlet Pipe

Fig. 43

Burner

Combustion

Box Base

Heat Exchanger

Support Bracket

Combustion Box Base

i) Loosen the two screws retaining the heat exchanger

support bracket and slide to the left to remove

(Fig. 44).

j) Remove the four screws securing the heat

exchanger/combustion box base and withdraw the

base.

k) Lower the central insulation panel and check

condition (Fig. 44). Replace the lower insulation pad if

necessary.

l) Ensure the heat exchanger fins are clear of any

obstruction.

m) Check condition of all seals. Important: Pay

particular attention to the condition of the

combustion box door seals.

n) Reassemble in reverse order and check for leaks.

8.	Check the operation of the condensate pump and
drain pipework (see Section 10.1)
9.	Check CO/CO2 ratio at flue sampling point (Fig.41a).
See section 4.0.

Burner Securing

Screws

Securing Screws

Fig. 44

10. Complete the relevant Service Interval Record

section of the Benchmark Commissioning Checklist at

the rear of this publication and then hand it back to the

© Baxi Heating UK Ltd 2011

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