Table of Contents
Advertisement
Supplied by HeatingSpares247.com
Fault Finding - Page 21
SYMPTOM
LOW WATER TEMPERATURE Continued..
NOISY HEATER
SMELL OF COMBUSTION
PRODUCTS
POSSIBLE CAUSE
3.
Faulty diaphragm. Will also cause
a high water rate.
4.
Automatic gas valve push rod
sticking. May also cause a high
water rate.
5.
Slow ignition screw incorrectly set.
Will also cause a high water rate.
6.
Frost damage to thermostat bulb.
Recognised as a crushed bulb.
7.
Thermostat throttle stuck in the
open position. Will also cause a
high water rate.
1.
Heat exchanger scaled. Ultimately
this will cause the heat exchanger
fins to discolour and buckle.
2.
Noisy ignition could be caused by
incorrect setting of the slow
ignition screw.
3.
Reduced pilot rate caused by dirt.
4.
Burner aeration ports and main
flame ports blocked.
1.
Faulty case or terminal seal.
2.
Failure to follow Instructions with
regards to openable windows and
doors.
SOLUTION
3.
Replace the diaphragm assembly
- Part No 10/17534.
4.
Dismantle clean and regrease
using Dow Corning 111 silicone
grease. Handle the push rod with
care, do not bend.
5.
See Fig. 16 for the position of the
screw. Turning the screw
clockwise delays the ignition, anti-
clockwise advances the ignition.
The screw should be set 2 full
turns out (anti clockwise) from the
fully in position. When correct the
burner ignition should be smooth
and quiet when a hot water outlet
is opened.
6.
Replace thermostat assembly -
Part No 10/13486.
7.
Descale, regrease and replace '0'
rings as necessary.
1.
Descale or replace - Part No
10/17667.
2.
See Fig. 16 for the position of the
screw. Turning the screw
clockwise delays the ignition, anti-
clockwise advances the ignition.
The screw should be set 2 full
turns out (anti clockwise) from the
fully in position. When correct the
burner ignition should be smooth
and quiet when a hot water outlet
is opened.
3.
Clear injector by blowing through
or replace with pilot injector Part
No 19/12690. Also clean the lint
filter located at the base of pilot
tube.
4.
Carefully clean the burners with a
vacuum cleaner.
1.
Check that the outer case seal -
Part No 10/17501 and terminal
seal - Part No 31/12299 are in
good condition, replace if
necessary. Ensure the outer case
is correctly positioned.
2.
Re-site the appliance.
Advertisement
Table of Contents
