Baxi 100 He Installation And Servicing Instructions page 28

Injector Pipe
Injector Pipe
Retaining Screw
Protection
Sensor Leads
Fig. 42
Wing Nuts
Central Insulation Panel
Burner
Combustion
Box Base
Heat Exchanger
Support Bracket
Combustion Box Base
Securing Screws
Burner Securing
Screws
Fig. 44
28
H IG
LO
Securing Nut
Fan
Condensate
Trap
Electrical Supply
Sensor
Leads
Lock Nut
Condensate
Drain Pipe
Fig. 43
H
W
H IG
H
LO
W
12.0 Servicing the Boiler
12.1 Annual Servicing (Cont)
NOTE: General cleaning can be
undertaken using a vacuum. However
debris should only be gently blown off the
burner skin due to its fragile nature.
10. 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) Undo the condensate trap securing nut, lock
nut and the condensate drain pipe. Remove the
condensate trap and disconnect the sensor
leads (Fig. 43).
g) Remove the two screws securing the burner
and remove the burner. Visually inspect the
internal burner baffle for obstruction.
NOTE: The burner skin is fragile - handle
with care. Clean and if necessary replace the
burner (Fig. 44) (see note above).
h) Loosen the two screws retaining the heat
exchanger support bracket and slide to the left
to remove (Fig. 44).
i) Remove the four screws securing the heat
exchanger/combustion box base and withdraw
the base.
j) Lower the central insulation panel and check
condition (Fig. 44). Replace the lower insulation
pad if necessary.
k) Ensure the heat exchanger fins are clear of
any obstruction.
l) Check condition of all seals.
particular attention to the condition of the
combustion box door seals.
m) Reassemble in reverse order.
11. Complete the relevant section of the
"Benchmark" Installation, Commissioning and
Service Record Log Book and hand it back to
the user.
Important: Pay