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Worcester Manuals
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Installation instructions manual
Protection Function - Worcester Gas boiler Installation Instructions Manual
Wall hung rsf gas fired condensing boiler greenstar i system optional integral diverter valve for central heating systems and indirect fed domestic hot water
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BOILER FUNCTION
7.3
PROTECTION FUNCTION
AUTOMATIC INTERNAL FROST FUNCTION
Boiler automatic
frost function
(monitors internal boiler
primary temperature)
PUMP OVERRUN FUNCTION
End of boiler demand
(central heating or
domestic hot water)
PUMP ANTISEIZE FUNCTION
No central heating
demand after
a 24hr period
Fig. 22 Protection function
18
Internal boiler
temperature
between
8°C & 5°C
Internal boiler
temperature
below 5°C
Pump runs for 3 minutes
to dissipate heat from
the boiler into the system
Pump runs 5 seconds
A central heating demand
every 24hrs from
last time pump ran
Internal boiler
Pump runs
temperature
rises above 9°C
Internal boiler
Central heating
demand is activated
rises above 12°C
activated, pump runs
normally
6 720 645 222a (2012/05)
Pump switches off
after a 3 minute
overrun period
Central heating
demand switches
temperature
Pump switches off
after a 3 minute
overrun period
6720643895-111.1Wo
off
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