Supplied By www.heating spares.co Tel. 0161 620 6677
SECTION 7
SERVICING INSTRUCTIONS
7.2.2
7.1
SERVICING
Ravenheat are a member of the Benchmark
initiative and fully supports the aims of the
programme. Benchmark has been instruct-
ed to improve the standards of installation
and commissioning of central heating sys-
tems in the UK and to encourage the regu-
lar servicing of all central heating systems
to ensure safety and efficiency.
7.1.1
To ensure continued efficient operation of the
appliance it is necessary to carry out servic-
ing and cleaning at regular intervals. The fre-
quency of cleaning will depend upon the par-
ticular installation conditions and usage but
in general. once year should be adequate.
WARNING
B e f o r e
t h e s t a r t o f a n y s e r v i c i n g o r
replacement of components always iso-
late electricity supply to the appliance
and always turn off the appliance gas
supply at the gas service cock.
Data badge position - lower left hand sub
frame.
-
The following notes apply to the appli-
ance and its controls but it should be
remembered that attention must also be
paid to the heating and hot water cir-
cuits with special attention to radiator
valves, thermostats, clocks, leaking hot
water taps etc.
-
Where it is necessary to replace a gas-
ket that relies on adhesive for securing -
this adhesive will be supplied with the
gasket as a spare item.
- In all cases prior to servicing, remove
the outer case (sect. 5.4). Operate the
appliance by turning the hot water ser-
vices on to a high water flow, and
observe the main burner.
- Check that the flame covers all the
flame ports and is of a light blue colour.
Yellow flames and excessive lifting of
flames indicate poor combustion.
-
IMPORTANT: After completion any ser-
vicing or replacement of gas carrying
components it is essential that a test for
gas soundness is always carried along
with functional checks in operation.
7.2
TO INSPECT AND CLEAN THE
APPLIANCE
7.2.1
Before carrying out cleaning operation,
cover the electrical control panel with a
piece of waterproof material to protect it
from debris.
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
7.2.6
7.2.9
7.3
7.3.1
7.4
7.4.1
7.4.2
7.4.3
7.4.4
Inspect the heat exchanger for any block-
age. Deposits of any material should be
brushed always using a soft brush.
NOTE: Do not use brushes with metallic
bristles.
Examine internal pipe-work connections
and automatic air vent for any water leaks.
Rectify if necessary.
Examine the combustion chamber insulating
material and renew if damaged (sect. 7.9).
Remove and examine the main burner
injector clean or renew as necessary (sec.
7.12 & 7.14).
Inspect the main burner and remove any
deposit with a soft brush. Check the elec-
trodes for damage or deterioration, clean
or renew as necessary. Ensure that the
spark gaps are correct to dimensions spec-
ified in Fig. 52.
Examine the fan for any mechanical dam-
age, check to ensure free running of the
fan wheel. Clean the wheel if necessary
with a soft brush. Check sealing gasket
and renew if damaged (sect. 7.6).
Examine flue duct and flue hood and
ensure that there
IS
no obstruction. Exam-
ine the gasket at the entry into the flue
duct.
It is essential that a good seal
IS
made at
the outlet to the fan, renew this gasket if
there is any sign of damage or deterioration.
TO REMOVE/REPLACE THE FRONT
PANEL OF THE CASING (Fig. 19 & 20)
Unscrew the 2 screws that fasten the lower
grating on the casing and remove it from it
( F i g . 2 2 )
Remove the 4 screws that secure the top
and bottom of the casing. (Fig. 19). Careful-
Iv side forward to lift off. Make sure the cas-
ing and screws are put to one side in a
safe place.
TO REMOVE/REPLACE THE COMBUS-
TION CHAMBER COVER
Remove the casing panel (sect. 7.3).
Unscrew 6 the screws that fasten the cover
to the chamber body and put them into a
container so that they don’t get lost.
Pull the cover forward to lift off.
Reassemble in reverse order.
Ensure good seal of cover when replacing.
32
