Bosch GREENSTAR HEATSLAVE EXTERNAL 18/25 Instruction Manual page 41

8 716 113 389d 30/3/10 14:01
K
A
B
H
C
I
or
H
I
C
M
L
1
3
4
2
Plan sectional view
12/18kW & 18/25kW
FRONT
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389d (03/2010)
All manuals and user guides at all-guides.com
Page 41
E
K
G
Plan sectional view
25/32kW
M
O
FRONT
INSPECTION AND SERVICE
External oil filter:
Remove the paper element from the external
oil filter and replace it. If the filter contains a
washable element, thoroughly clean in
kerosene and reassemble into the filter.
Clean the boiler:
Manifold access:
Release screws (A) to remove the flue
manifold access cover (B) and clear any debris.
Check the flue system and clean if necessary.
Remove the baffle retainer (H) and baffles ( I )
from the secondary heat exchanger.
Check and clean the secondary heat
exchanger surfaces.
F
NOTE: Do not use wire brushes and
cleaning agents to clean the stainless
steel secondary heat exchanger
components.
Check the condensate route (C) is clear.
D
The condensate trap (D) should be removed
and checked for debris.
Release the pipe locking tab (E) and disconnect
the flexible pipe (F) from the top of the trap and
move the flexible pipe up away from the trap.
Release the trap locking tab (G) and move the
trap up and back to remove from it mountings.
Clean the trap by flushing with water.
Check the O ring seals and replace if necessary,
grease the seals with a solvent free grease.
Refit the trap making sure that the locking
tabs are locked in place.
Pour 500ml of water into drain ( C ) to refill
the condensate trap.
Clean the secondary heat exchanger baffles
( I ) if necessary and refit correctly.
Refit the baffle retainer (H).
E
G Check the seal on the manifold access cover
(K) and replace if necessary.
Refit the flue manifold access cover (B)
and secure with screws (A).
Combustion chamber:
Release the M10 retaining nuts and washers
( L ) and remove combustion chamber access
door (M).
Check the fibreglass rope seal on the
combustion chamber access door (M) and
replace if necessary.
Remove and check the baffle retainer (N).
Remove the baffles (O), clean and check the
condition of the baffles and the acoustic
insulation. Replace any baffles or insulation
pads considered to be badly corroded/degraded.
Thoroughly clean all of the heat exchanger
surfaces using a suitable brush and clear all
M
loose debris from the combustion chamber.
Check the condition of the combustion
chamber access door insulation. If the
insulation is damaged the door assembly
must be replaced.
Refit the items in reverse order ensure the
baffles (O) and baffle retainers (N) are
correctly fitted for the boiler output as shown
in the plan view opposite.
Refit combustion chamber door (M).
O IMPORTANT: Secure with nuts and
washers ( L ) and tighten, using the
sequence shown in figure, until the
chamber door is firmly secured, do not
over tighten the nuts.
INSPECTION AND SERVICE
41