Fault Finding - Page 21
SYMPTOM
POSSIBLE CAUSE
SOLUTION
LOW WATER TEMPERATURE
Continued..
3.
Faulty diaphragm. Will also cause
a high water rate.
3.
Replace the diaphragm assembly
- Part No 10/17534.
4.
Automatic gas valve push rod
sticking. May also cause a high
water rate.
4.
Dismantle clean and regrease
using Dow Corning 111 silicone
grease. Handle the push rod with
care, do not bend.
5.
Slow ignition screw incorrectly set.
Will also cause a high water rate.
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.
Frost damage to thermostat bulb.
Recognised as a crushed bulb.
6.
Replace thermostat assembly -
Part No 10/13486.
7.
Thermostat throttle stuck in the
open position. Will also cause a
high water rate.
7.
Descale, regrease and replace ‘0’
rings as necessary.
NOISY HEATER
1.
Heat exchanger scaled. Ultimately
this will cause the heat exchanger
fins to discolour and buckle.
1.
Descale or replace - Part No
10/17667.
2.
Noisy ignition could be caused by
incorrect setting of the slow
ignition screw.
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.
Reduced pilot rate caused by dirt.
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.
Burner aeration ports and main
flame ports blocked.
4.
Carefully clean the burners with a
vacuum cleaner.
SMELL OF COMBUSTION
PRODUCTS
1.
Faulty case or terminal seal.
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.
Failure to follow Instructions with
regards to openable windows and
doors.
2.
Re-site the appliance.
Supplied by HeatingSpares247.com
