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+ 30mm
above elbow
5mm
5mm
600mm**
200mm
25mm*
GENERAL NOTES
4
To get the best from your boiler please
read these instructions carefully.
SEALED HEATING SYSTEMS
This boiler is fitted to a sealed heating
system which is pre-pressurised. Your
installer will advise you of the minimum
and maximum pressure which should be
indicated on the pressure gauge.
Check regularly that the pressure is
maintained and contact your installer or
maintenance engineer if a permanent
significant drop in pressure is indicated
on the pressure gauge. If the system
loses pressure it should be re-pressurised
and the cause of the fall investigated.
CENTRAL HEATING SYSTEMS
During the first few hours of operation of
the central heating system, check that all
radiators are being heated evenly. If the
top of a radiator is at a lower temperature
than the bottom then it should be vented
by releasing air through the venting screw
at the top of the radiator. Ask your
installer to show you how this is done.
This boiler is fitted to a sealed system;
repeated venting will reduce the quantity
of water in the system and this must be
replenished for safe and satisfactory
operation of the boiler.
Should water leaks be found in the
system or if excessive venting is required,
then a service engineer must be
contacted to inspect the installation and
rectify any fault.
Only additives that are compatible with
aluminium may be used in the system. Any
incompatible additive used will invalidate
the guarantee.
CONDENSATE DRAIN
This is a condensing boiler and the
terminal will, at times give out a plume of
water vapour. This is quite normal.
The boiler also produces quantities of
condensate which is discharged regularly
by a syphon within the boiler via a pipe to
drain. This pipe must not be blocked or
altered in any way.
CLEARANCES - VENTILATED
COMPARTMENT
Your installer will have provided adequate
space around the boiler for safety and
servicing access. Do not restrict this
space with the addition of cupboards,
shelves etc. next to the boiler.
GENERAL NOTES
ROOM THERMOSTAT
A room temperature controller and
programmer should be fitted to control the
central heating. Refer to the instructions
supplied with the thermostat for
information on siting and setting.
THERMOSTATIC RADIATOR VALVES
It is recommended that this type of valve is
fitted to all but one of the radiators (or at
least those in the sleeping
accommodation). The remaining radiator,
which must be where the room thermostat
is located, should be un-controlled and
must be left open. The thermostatic
radiator valves should conform to the
requirements of BS2767:10.
INTRODUCTION
*600mm service clearance required to a fixed surface
(**25mm from removable door or panel)
WORCESTER BOSCH GREENSTAR 25Si/30Si
8 716 115 169b (09/2008)