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Worcester-Bosch Greenstar Highflow CDi 2016-2023 Manual

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Glossary
Greenstar Highflow CDi ErP – 6 720 818 076 (2015/12)
11 Glossary
Central heating systems
All radiators must be heated at an even rate. If the top of a
radiator is at a lower temperature than the bottom then it
should be bled by releasing air through the bleed 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. Should water leaks be
found or if excessive bleeding 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.
Pluming and condensate drain
This is a condensing boiler and the flue terminal will, at times
give out a plume of water vapour. This is quite normal.
The boiler produces condensate which is discharged regularly
from within the boiler via a plastic pipe to a drain point. This
pipe must not be blocked or altered in any way.
Room thermostat / programmer
A room thermostat and a twin channel programmer must be
fitted to control the central heating and hot water. This controls
the timing of the central heating and hot water, preventing the
boiler from firing unnecessarily. If pre-heat mode is used, then
this mode can be timed to be on during times of high demand.
Refer to the instructions supplied with the thermostat and twin
channel programmer for further information.
Thermostatic radiator valves
Thermostatic radiator valves must be fitted in sleeping
accommodation. It is recommended that this type of valve is
fitted to all but one of the radiators. The remaining radiator,
where the room thermostat is located, must be uncontrolled
and left open.
Pump over run function
After the boiler has finished a demand for central heating or hot
water, the pump may continue to run for a short while to
dissipate the heat from within the boiler.
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.
SEDBUK
Seasonal Efficiency of Domestic Boilers in the UK.
… 17 …


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