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Danfoss 811 Manual

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If an incorrect key is pressed then press the ‘Cancel’ key and recommence
the sequence.
If a programme event is repeated at the same time on diff erent days then
the keying may be simplifi ed as follows.
Key in the fi rst event using the normal entry sequence. Now simply key
in the new day number and then ‘Enter On’ or ‘Enter Off ’ as required.
The complete programme may be checked by the use of the ‘Verify’ key.
Each press of this key will advance the programme by one event allowing
a complete review in chronological sequence commencing from the day
and time on display. If a particular day’s programme is to be reviewed then
key the day number followed by
0 0 0 0 and Verify
when the fi rst programmed event for that day will be displayed then
proceed with repeated presses of the ‘Verify’ key.
When reprogramming one or more events, unwanted events must be
cleared by advancing to the event in question using the ‘Verify’ key as
explained above and then clearing it by a single press on the ‘Cancel’ key.
To clear the entire programme, press and hold down the ‘Cancel’ key for
approximately 3 seconds until the display shows
E EEEE
On completion of the programming return the key to Run and the selector
switch to Auto.
Extend Facility
The mains electricity supply must be ON and the keyswitch set to Run
before using the facilities detailed on this page.
The unit is supplied with an extend facility to allow additional periods of
operation without disturbing the set programme.
The extend period is set to 1 hour, but at the time of installation this can
easily be altered.
To alter the extend period:
Insert the key and turn to Set Programme
Press ‘Extend’ and the display will show the extend period.
Press any of the numerical keypads to alter the extend period to 1 to 8
hours or 0 to disable the function (display will show ‘nil’), or 9 for a constant
extend period (display will show ‘con’).
Once the required extend period is displayed, press ‘Enter On’ and the
new extend period will be stored.
Using the Extend Function:
With the keyswitch set to Run, pressing ‘Extend’ activates the additional
period of operation.
If the key is pressed when the output is ‘Off ’ it will switch on immediately
and will automatically switch off after the extend period has elapsed. The
associated red indicator light will be illuminated throughout the extend
period.
If the key is pressed when the output is ‘On’ the current ‘On’ period will be
extended by the length of the extend period. The red indicator light will
be illuminated until the output is switched off .
The Extend facility may be cancelled at any time by pressing the key
again, when the indicator light will go out and the unit will revert to the
set programme.
Crop Facility
This facility enables a current ‘On’ period to be cancelled without having
to disturb the set programme.
If the ‘Crop’ key is pressed when the output light is illuminated it will
switch the output off until the next programmed ‘On’ event. During
the remainder of the present ‘On’ period the associated red light will be
illuminated and the output light will be off . The programme event light
will remain unchanged.
Pressing the ‘Crop’ key again will cancel the Crop facility and restore the
unit to the set programme.
Note: Pressing the ‘Crop’ key when the output is already programmed to
be off will have no eff ect.
BATTERY RESERVE
The unit does not rely on the internal battery in order to work satisfactorily
providing the mains power supply is connected to the unit. The battery is
fi tted purely to memorise the Time of Day and selected Switching Times
in the event of a power failure or disconnection of supply.
When the unit is fi rst connected it will require a minimum of 24 hours to
become suffi ciently charged in order to perform this memory function.
Thereafter the battery is automatically recharged.
If the mains power supply is lost, for any reason, the display and lights on the
unit will go out and the output will be switched off . The battery will maintain
the memory for a period of up to 3 months during this condition. When
the power supply is restored, the unit will automatically switch on again
and resume the set programme without any resetting being necessary.
Danfoss Randall can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss Randall reserves
the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without
subsequent changes being necessary in specifi cations already agreed.
Danfoss Ltd
Ampthill Road,
Bedford MK42 9ER.
Tel: (01234) 364621 Fax: (01234) 219705
Email: ukheating@danfoss.com
Website: www.heating.danfoss.co.uk
Part No: 3044 Issue 7 12/05
Example Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Assigned Day No. 1 2 3 4 5 6 7
Event/Time ON 0830 ON 0929 ON 0436 OFF 0034 ON 0929 ON 0853
OFF 1342 OFF 2317 OFF 1129 ON 0708 OFF 2317 OFF 1342
ON 1916 OFF 1723
Record Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Assigned Day No.
Event/Time
2


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