How to use your Vaillant 24-hour central heating
time clock
Operating controls
1. Operation mode switch
The time is controlled as following:
Heating constantly off
Heating constantly on
Heating Controlled by timer
2. Time reference triangle
Indicates the time of day i.e.
‘10.00’ AM in fig opposite
3. Minute hand
For showing and setting the time
4.Slide in the tappets
Tappets in = heating on
5.Slide out the tappets
Tappets out = heating off
6.Time of day
The time of day can be read
opposite the time reference
triangle (4). Please note that the
time of day is given using a 24
hour clock.
.
1. Time Setting
Turn the minute hand clockwise until the time reference
triangle coincides with correct time of day.
2. Mode Setting
Set the tappets (4 & 5) at the required position for the
selected time periods. Each tappet represents a time
interval of 15 minutes.
Tappets in (4) heating on. Tappets out (5) heating off.
Turn the mode operation switch (1) to the clock position.
This will allow the central heating to be controlled ‘ON’ or
‘OFF’ according to the periods you have selected on the
tappets.
1
2
3
4
5
6
3. To override selected time periods
If you require the central heating ‘ON’ continuously,
turn the operating mode switch (1) to the ON
position. If you require the central heating ‘OFF’
continuously, turn the operating mode switch (1) to
the OFF position.
Note: The ‘OFF’ position should not be selected
for extended periods during frost conditions, select
‘Auto’ for normal timed operation to maintain the
building and heating system above freezing.
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