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Danfoss 851 Handleiding

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Output
DESCRIPTION
Models 811 and 851 are identical in appearance except for the model
number shown on the facia.
The Day and Time are displayed as fi ve digits on the liquid crystal display
(LCD).
The fi rst digit in its separate window marked Day will be a numerical from
1 to 7 which may be allocated in sequence to the days of the week at the
user’s discretion. The normal convention is Monday = 1, Tuesday = 2 .........
Sunday = 7.
The remaining four digits in the window marked Time will display the time
to a resolution of one minute from 0000 to 2359.
A short ‘bleep’ will be heard when a keypad is pressed. In addition when
a numeric keypad is pressed the associated digit on the LCD will either
blink or change.
There are fi ve red indicator lights. Four are associated with the keypads
‘Extend’, ‘Enter on’, ‘Enter Off ’ and ‘Crop’, and one labelled ‘Output’.
The 2 position selector switch may be set to Off to override the programmes
or it may be set to Auto to follow the programme which has been set.
The programme indicator lights will switch on and off to follow the set
programme events in both the selector switch positions but the output
status indicator light will only be on if the selector switch is at Auto and
either the Enter On or Extend indicator lights are on.
If the Enter On and Crop indicator lights are On the output status indicator
light will be off .
It is recommended that the key be removed from the keyswitch to prevent
unauthorised or accidental changes to the settings. The key can only be
removed when in Run position.
TIME OF DAY
The mains electricity supply must be ON, the key inserted and turned
to Set Time position before carrying out the operations detailed below.
When the timeswitch is fi rst connected, or when the battery has been
allowed to discharge fully, and the mains electricity supply is switched ON
a dash (-) will be displayed in each of the fi ve digit positions.
Decide which day of the week you wish to assign as Day 1.
Press the number key representing the current day of the week (listen for
the ‘bleep’).
The remaining days will be automatically numbered in sequence.
Key in the time using four keypads e.g. 8:30 a.m. must be keyed as
0 8 3 0
and 6:15 p.m. as
1 8 1 5
The unit will not allow the entry of a spurious day or time e.g. day 8 will not
be accepted nor will a time entry of 3600. Depression of an out of range
key will not register on the display; the LCD digit will blink but remain
unchanged until an acceptable number is keyed.
DO NOT PRESS ANY FUNCTION KEYPADS.
Returning the key to the Run position will enter the time shown on the
display.
Seven Day Single Channel Electronic Timeswitch
Models 811 and 851
User Instructions
SETTING SWITCHING TIMES
The mains electricity supply must be ON, the key inserted and turned to
the Set Programme position before carrying out any of the operations
detailed below.
Initially the display will show
E E E E E
indicating that the memory is empty.
Since the timeswitch is capable of automatically carrying out up to 200
switching operations it is recommended that the required programme be
tabulated before setting is commenced, noting that the day number on
display is the current day of the week. A table is provided for this purpose.
It is not essential to key in the programme in sequence since it will
automatically be sorted into chronological order.
To set a programme event:
First press the number key representing the day of the week to be
programmed.
Secondly, key in the time using four numeric keypads in the range 0000
to 2359.
Finally press ‘Enter On’ or ‘Enter Off ’ to enter the required event into
the memory.
The unit will not allow the entry of a spurious day or time e.g. day 8 will not
be accepted nor will a time entry of 3600. Depression of an out of range
key will not register on the display; the LCD digit will blink but remain
unchanged until an acceptable number is keyed.
Proceed with the programming of every event using the same entry
sequence.
If an attempt is made to exceed 200 programme events then the display
will show
F F F F F
indicating that the memory is full.
78
9
45
6
12
3
Verify
0
Cancel
Enter On
2I084
Auto Off
Set
Programme
Run
Day Time
Day of Week Display
Time of Day Display
10
Numeric
Keypads
6 Function
Keypads
3 Position
Keyswitch
Output Status
Indicator Light
CAUTION: The unit operates at mains voltage and should only be opened by a
qualifi ed engineer after disconnection from the mains supply.
851
Programme
Indicator Lights
Set Time
Extend
Enter Off
Crop
2 Position
Selector
Switch
Model
811 or 851
2
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
1

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