Supplied By www.heating spares.co Tel. 0161 620 6677
21
UNICA BHE
6.14
FLUE FAN & MIXER (fig. 28)
Carry out component removal procedure as de-
scribed in 6.4. Unclip and remove the air chamber
front and the RH side covers. Slacken the gas
pipe
(A)
at the air box connection and swing/ro-
tate away from the fan assembly. Locate and re-
move the sense electrode. To remove the mixer
(B)
locate and remove the three screws
(C)
. To
remove the fan
(D)
, disconnect the electrical con-
nections attached to the fan, locate and remove
the four screws
(E)
. Gently ease the fan from its
location. Replace in the reverse order. Ensure all
seals are in good condition, taking care to ensure
they are replaced correctly.
fig. 28
fig. 30
A
B
E
C
D
E
F
B
A
D
C
fig. 29
C
A
B
D
E
A
C
D
fig. 27
6.13
ELECTRODES & CONDENSE SENSOR (fig. 27)
Carry out component removal procedure as de-
scribed in 6.4. Unclip and remove the air chamber
front and RH side covers. Disconnect the elec-
trode leads and ancillary wiring from their respec-
tive connectors. Remove the retaining screws
(A)
for electrode
and remove. Remove the retaining
nut
(C)
for condense sensor
(D)
and remove.
6.15
BURNER (fig. 30)
Carry out component removal procedure as
described in 6.4. Unclip and remove the air
chamber front and the RH side covers. Slacken
the gas pipe
(A)
at the air box connection and
swing/rotate of the fan assembly. Locate and
remove the 3 internal nuts
(B)
which secure the
fan assembly in position
(C)
to the heat exchanger
(D)
. Disconnect the electrode leads and ancillary
wiring from their respective connectors. Remove
the retaining screws
(A, fig. 29)
for sensing
electrode
and remove. Remove the retaining nut
(C, fig. 29)
for condense sensor
(D, fig. 29)
and
remove. Gently ease the fan assembly out of its
location. Once the assembly has been removed,
the burner
(E)
can be withdrawn from the heat
engine. Ensure the seal
(F)
is in good condition,
taking care to ensure it is replaced correctly.
Replace in the reverse order.
fig. 26
6.12.1 INJECTOR (fig. 26)
Carry out component removal procedure as de-
scribed in 6.4. Unscrew and remove gas pipe
connections
(A & E)
. Locate and remove the
injector
(F)
inside the pipe. Replace in the reverse
order. Check and adjust burner pressure settings.
WARNING, A GAS TIGHTNESS CHECK MUST
BE CARRIED OUT.