Manual Overrides - Horstmann ChannelPlus H27ZXL Series 2 User Operating Instructions Manual

Two zone central heating programmer
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BOOST FUNCTION - 1 OR 2 HOUR TEMPORARY OVERRIDE
The boost facility will allow the user to either activate a channel which is currently 'OFF'
for 1 or 2 hours, or to extend a current 'ON' period by 1 or 2 hours. To indicate the boost
being activated the 'BOOST' button under the selected channel will stay illuminated for the
duration of the boost/extension period. The display will also indicate the extension to the
time visually on the screen.
Press the BOOST
button once for a
1 hour Boost
ADVANCE FUNCTION - BRINGS FORWARD THE NEXT ON OR OFF OPERATION
The advance facility will allow the user to either bring a channel 'ON' which is currently
'OFF' or switch a channel 'OFF' which is currently 'ON'. To indicate the advance feature
being activated the 'ADVANCE' button under the selected channel will stay illuminated
until the next programme switching time, the user display will change to also indicate the
status of the channel and the next switching time.
Press ADVANCE
button once to
move to the next
ON/OFF time
4

Manual Overrides

Press the BOOST
button twice for a
2 hour Boost
To cancel the advance
press the ADVANCE button
again. This will return
the unit to its normal
programme
Press BOOST button
a third time to
cancel the period
and return to the
normal programme

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