Instruction manual

• This boiler is only suitable for installing
internally within a property at a suitable
location onto a fixed rigid vertical non
combustable surface of the same size as the
boiler and capable of supporting the boiler
weight.
• The boiler is not suitable for external
installation unless a suitable enclosure is
provided.
• Roof space installations must fully conform to
BS 5410 part 1 section 4.6.9.
Open flue model (CF):
• In order to ensure clean and efficient
combustion an adequate supply of air must
be delivered to the combustion chamber.
• To provide sufficient air a suitable inlet must
be provided into the room or space in which
the boiler is situated.
An air brick or other form of continuous air
supply may have to be built into the installation
in order to ensure an adequate supply of air.
• If the appliance is to be installed in a confined
space or compartment two air vents will be
required, one at high level and one at low
level.
• The minimum area of each vent is given in the
chart opposite and the size depends on
whether the air is taken from another room or
outside the building.
• Where air is taken from another room that
room must contain an air inlet as described
above.
Room sealed balanced flue option (RS):
• This option does not require a seperate vent
for combustion air.
• Installations in cupboards or compartments
require permanent vents for cooling purposes,
one at high level and one at low level, either
to outside air or to a room. Both vents must
pass to the same room or be on the same
wall to the outside air.
• The minimum air vent free area is given in the
chart opposite and the size depends on
whether the air is taken from another room or
outside the building.
Clearances:
• The diagram shows the minimum clearances
required around the boiler for servicing.
• At least 1300mm will be required in front of
the wall to install the boiler.
* Due to changes in BS 5410 and modern
building design, these figures no longer
incorporate the adventitious ventilation
allowance.
MINIMUM AIR VENT AREA (cm
2
) FOR APPLIANCES
INSTALLED IN A COMPARTMENT:
1
Internal air to and from a space/room inside the building.
2
External air to and from directly outside the building.
External
2
ventilation
High Low
Level Level
99 198
138 275
Conventional flue:*
Internal
1
ventilation
High Low
Model Level Level
12/18 198 297
18/25 275 413
Room Sealed flue:*
Internal
1
ventilation
High Low
Model Level Level
12/18 198 198
18/25 275 275
External
2
ventilation
High Low
Level Level
99 99
138 138
BOILER LOCATION &
CLEARANCES
12/18
CF minimum air inlet sizes*
99 138
18/25
Output
Size cm
2
300mm
10mm
10mm
200mm
1010mm
620mm
430mm
1380mm
20mm
to removable door
600mm
front clearance
for service
PRE -
INSTALLATION
BOILER LOCATION &
CLEARANCES
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
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