SERVICING AND SPARES
6 720 803 599 (2012/06) 39
B Fit new plastic sealing cover onto the max adjuster.
B Replace the brass screw over the min adjuster on the valve.
B Re-assemble and refit boiler case.
Fig. 51 Setting the Air/Gas ratio
6.3 REPLACEMENT OF PARTS
REMOVING OUTER CASE
1. Remove bottom panel by pulling it forward and off.
2. Loosen but do not remove the 2 screws (A) securing boiler casing at
the bottom of the appliance.
3. Pull upwards to release the clip (B) on top of the boiler.
4. Pull case forward and remove.
Fig. 52 Removing outer case
MOVING BOILER CONTROL TO SERVICE POSITION
1. Press in the centre of the white plastic clip securing the control panel
and slide down to release.
2. Pull the control panel forward into the service position.
Fig. 53 Controls to service position
CAUTION: TURN OFF THE GAS SUPPLY AND ISOLATE
THE MAINS SUPPLIES BEFORE STARTING ANY WORK
AND OBSERVE ALL RELEVANT SAFETY PRECAUTIONS.
NOTICE: After replacement of any components always
check for gas tightness where relevant and perform
functional checks as described in the Commissioning
section.
O-rings or gaskets must be replaced.
Inlet pressure
test point
Min
adjust
4mm
Max
adjust
6720647361-48.1Wo
A
B
4.
6720647361-27.4Wo
2.
3.
1.
6720647361-32.2Wo
2.
1.
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