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Mersey Super - Installation & Service Instructions
NOISY HEATER
Page 20
FAULT FINDING - Page 21
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3. Automatic gas valve push rod
sticking. May also cause a high
water rate
4. Slow ignition screw incorrectly
set. 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
byincorrect setting of the slow
ignition screw.
3. Reduced pilot rate caused by
dirt.
4. Burner aeration ports and main
flame ports blocked.
Page 32 of 35
3. Dismantle clean and
regrease using Dow Corning
111 silicone grease. Handle
the push rod with care, do
not bend.
4. 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
water outlet is opened.
1. Descale or replace - Part
No 10/17558.
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 (anticlockwise)
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.
09/12/2009
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