9
simply withdrawn for cleaning by removing
the M6 bolts securing it and lifting it off the
heater. The reflector can be cleaned with a
soft cloth and detergent in water. A mild
non abrasive metal polish may be used in
cases of extreme discolouration. Dirty
reflectors will increase the heat radiation
upwards into the roof space by 3-4%.
Sweeping of flue
As a part of the annual service of type B
appliances the flue should be periodicly
swept inaccordance with the regulations of
the country that the appliance is installed.
For servicing of injector, electrode assembly,
refer to Section 14.
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Remove the 2 M6 bolts and 2 M5 screws
securing the rear burner cover.
Attach u-tube manometer.
Loosen M8 grub screw on damper assembly
and slide damper blade out fully for a VC20
and half way for a VC12
Commissioning
Refer to section 5 and follow the procedure
for commissioning the installation using the
relevant herringbone pressures shown in
figure 23.
Heater Type
Damper Setting when
hot (mbar)
VC12N
0.6
VC12P
0.6
VC20N
1.0
VC20P
1.0
Remove the cover from the burner box.
Locate pressure tee piece.
14 Herringbone adjustment
