Supplied By www.heating spares.co Tel. 0161 620 6677
25
Part No. 5000893
Descale/Regrease & Recalibrate
h. Remove the 2 screws securing the r
etaining plate to the throttle body.
i. Strip down the throttle assembly, descale
and regrease using a silicone grease
such as Dow Corning 111. Replace 'O'
rings as necessary.
NOTE:
Removal of the internal parts may
be difficult due to scaling etc, if
necessary, remove the grub screw from
the rear of the throttle body and screw in
one of the long thermostat screws. This
will force the internal parts out. KEEP
AWAY FROM FACE AND EYES.
j. On re-assembly, recalibrate the
thermostat as follows:-
Re-fit the grub screw.
Turn temperature selector to '5'.
Open a hot water outlet.
Adjust the grub screw until water
temperature is between 55
°
- 58
°
C.
WARNING: Keep the throttle body pointing away from your face
and body when you turn the screw. The spring adjuster, spring
and gland housing will eject from the body with a lot of force.
TAKE GREAT CARE.
6.15 Heating Unit - Thames
a. Gain general access - see 6.2.
b. Drain the appliance - see 6.8.
c. Remove the 2 screws securing the energy
cut-off device to the heating unit (located
top front left).
d. Remove the thermostat phial from its
pocket - See 6.13.c.
e. Disconnect the 2 unions.
f. Remove 4 screws securing the unit to the
chassis.
g. Carefully pull the unit from the top and lift.
DO NOT lose the 'O' rings and washers.
h. Remove the primary flue, secured by 4
screws (2 front, 2 rear).
Note:
On re-assembly, ensure that the 'O'
ring is carefully seated within the thermostat
phial housing and that the thermostat phial is
inserted carefully to avoid disturbing the 'O'
ring.
Replacement Of Parts
Fig. 45
Fig. 46
