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ADVANCED FEATURES
B. TIMED PRE-HEAT
When Domestic Hot Water preheat is switched on at the boiler control the boiler will preheat during the timed
on central heating periods so as to provide more efcient water delivery. This function is disabled when the
preheat switch is set to off.
C. RTC (REAL TIME CLOCk) BACkuP
The electronic timer has a Real Time Clock which has a backup supply to maintain the date and time for when
power is removed from the boiler.
When power has been removed for more than 3 hours and is restored, it will be necessary to enter the date
and time again but the programmed periods will have been retained.
204773-3.indd 11 15/12/2011 14:32:39
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