Supplied By www.heating spares.co Tel. 0161 620 6677
23
Part No. 5000893
6.11
Automatic Valve and Burner
Manifold Complete
a. Gain general access - see 6.2.
b. Drain the appliance - see 6.8.
c. Remove the water governor - see 6.10.
d. Release the union above the flame safety
device. Do not lose the 'O' ring.
e. Release the retaining plate (2 screws)
and remove the burner supply pipe. Do
not lose the 'O' ring.
f. Prise the manifold location brackets apart
and carefully lift out the complete
assembly.
IMPORTANT: The automatic valve and
burner manifold are only available as a
combined assembly.
Retain all screws and
'O' rings from the old assembly or renew.
Note:
On re-assembly slide the pressure test
point extension tube through the grommet
before locating the manifold against the
location brackets.
g. Re-fit the water governor.
h. Re-connect the burner supply pipe.
j. Test for gas soundness as follows:-
- Ensure the water service cock is in the
OFF position, this will ensure that water
CANNOT flow and open the automatic
valve.
-Turn ON the gas, purge and light the
pilot, this will pressurise the burner supply
pipe.
-Test the burner supply pipe joints for gas
soundness using leak detection fluid.
k. Re-assemble remaining parts and ensure
the water service cock is in the ON
position.
IMPORTANT:
If the automatic valve and
burner manifold complete is dismantled, it
can only be tested for gas soundness under
pressure AFTER blanking off all the
injectors.
6.12 Water Governor Venturi
a. Gain general access - See 6.2.
b. Drain the appliance - See 6.8.
c. Release the union nut and clamping plate
then remove the feed pipe.
d. Using a large flat bladed screwdriver that
will engage both slots, remove the
venturi.
e. Clean and re-fit.
Replacement Of Parts
Fig. 39
Fig. 40
Fig. 41
