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SAFETY PRECAUTIONS
5
GENERAL NOTES
INTRODUCTION
+ 30mm
above elbow
200mm*
200mm*
100mm**
600mm***
200mm
**
***
WORCESTER BOSCH GREENSTAR 25Si/30Si
8 716 115 169b (09/2008)
BOILER CLEARANCES -
UNVENTILATED COMPARTMENT
The diagram opposite shows the
minimum space required to install and
service the boiler inside an unventilated
compartment.
** Space required for unventilated areas
with a removable door or panel.
*** 600mm clearance required to a fixed
surface for servicing.
* The boiler must have more clearance in
the unventilated compartment compared
to the ventilated compartment.
Two examples are shown opposite, refer
to the “Installation, commissioning and
servicing instruction manual” for further
information.
Do not add cupboards, shelves etc. to
restrict the space around the boiler.
VENTILATION
This is a room sealed boiler and does not
require any air for combustion from inside
the property. If the boiler is fitted into a
cupboard or a compartment is built
around the boiler after installation, then
the compartment must be separated from
the boiler space by a perforated non-
combustible partition as described in BS
6798.
Notwithstanding the requirements of BS
6798 and BS 5440 there is no need for
ventilation openings to be provided in the
compartment because of the low heat
loss from the boiler casing, if the
clearances shown are maintained.
Do not operate the boiler if the flue
terminal fitted on the outside wall or roof
is obstructed or damaged.
PUMP ANTI-SEIZURE
If there has been no heating demand for
24 hours the boiler will run the system
pump for a few seconds to reduce the
possibility of pump seizure during long
periods of inactivity, which is usually more
frequent during the summer months.