Bosch Worcester GREENSTAR CDi Series - REPLACEMENT OF PARTS

CAUTION: TURN OFF THE GAS SUPPLY AND ISOLATE THE MAINS
SUPPLIES BEFORE STARTING ANY WORK AND OBSERVE ALL
RELEVANT
SAFETY PRECAUTIONS.
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~ORCESTER
Bosch Group
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 25CDV30CDV37CDci42CD•
6 720 613 700a (2006/11)
REPLACEMENT
OF PARTS
IMPORTANT: AFTER
REPLACEMENT OF
ANY COMPONENTS ALWAYS CHECK FOR
GAS SOUNDNESS WHERE RELEVANT
AND CARRY OUT FUNCTIONAL CHECKS
AS DESCRIBED IN COMMISSIONING.
ANY 0-RING OR GASKET THAT APPEARS
DAMAGED
MUST BE REPLACED.
1. Removing outer case
1. ~ Remove bottom panel by pulling it forward
and off.
1.1 ~ Loosen but do not remove the 2 screws
(A) securing boiler casing at the bottom of
the appliance.
1.2
~ Pull upwards to release the clip (B) on top
of the boiler.
1.3
~ Pull case forward and remove.
2. Moving boiler control to service
position
2.1 ~ Remove screw (X)securing control.
2.2~ Gently pull forward.
3. Primary sensor
~ Press retaining clip on plastic moulding
and pull
upwards until clear of pocket in
heat exchanger.
~ Separate sensor from connector, coat
new sensor with heat conductive paste and
replace.
4. Overheat thermostat
~ Remove two electrical connectors from
thermostat.
~ Unscrew the sensor.
5. Flue limit thermostat
~ Remove electrical connections .
~ Unscrew thermostat from flue.
6. Expansion Vessel
~ Drain the appliance.
6.1 ~Remove locking screw (D).
6.2~ Undo the union connection (E) at the bot·
tom
of the expansion vessel.
~ Remove expansion vessel from boiler.
~ Set the pressure of the new vessel to that
required by the system.
INSPECTION AND SERVICE