Bosch 25/32kW - Manual (Page 38)

INSPECTION AND SERVICE
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389b (09/07)
37
INSPECTION AND SERVICE
CAUTION: ISOLATE THE WATER,
ELECTRICITY AND OIL MAINS SUPPLIES
BEFORE STARTING ANY WORK AND
OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS.
DO NOT USE PRESSURE WASHERS OR
STEAM CLEANERS ON THIS APPLIANCE
OR ITS CABINET.
WARNING: EXTERNAL EQUIPMENT
OPERATED AT 230 VOLTS SHOULD NOT
BE SERVICED OR REPAIRED UNDER
ADVERSE WEATHER CONDITIONS
Routine servicing:
To maintain efficient boiler operation, the
following should be carried out at least once a
year:
Carry out a pre-service check and note any
operational faults:
Pre-Service Check:
1 Unndo the screws at the base of the
front panel using the tool provided and pull
the panel down and out to remove.
Store safely away from the working area.
Operate the appliance and system and note any
faults which may need to be corrected during
the service.
Switch into service mode at switch (A).
2 Depress locking ears and unplug burner
lead (B) from control box (C).
• An adapter lead is available to allow mains
voltage service aids to be operated from
the service connection (G). (Service lead
Part No. 8 716 113 483 0).
3 Loosen clip (D) to detach air duct.
4 Unscrew burner retainers (E) to release
the burner combustion head (F).
Lift burner away, taking care not to over
strain the flexible oil hose/s or
connections.
See the following instructions for detail of some
of the service requirements listed
below:
Check and clean the burner.
Replace burner nozzle and flexible oil
hose/s.
Check and clean the baffle retainers.
Check and clean the baffles.
Check and clean the heat exchangers
surfaces.
Check the combustion chamber access
door insulation board.
Check that the flue system is unobstructed
and clean as necessary.
Clean or replace all oil filters.
Check that the condensate system is not
obstructed, clean and refill the condensate
trap as necessary.
Sealed systems only: The PRV is a safety
device and must be checked for correct
operation.
The expansion vessel pressure must be
checked and adjusted as required.
on
service
F
D
3
E
4
1
A
C
B
2
G
SER
V
IC
IN
G
&
SP
A
RES