Seven Day Pulsed Electronic Timeswitch Model 841 - Single Channel Model 842 - Two Channel User Instructions CAUTION: The unit operates at mains voltage and should only be opened by a qualified engineer after disconnection from the mains supply. Day of Week Display Day of Week Display Output Status Output Status Day of Week Display Indicator Light Day of Week Display Indicator Light Day Time Day Time 841 842 3 09i5 3 0928 Auto Off Manual Auto Off Manual Output 78 9 78 9 Output Set Ch.1 Enter Enter 45 6 45 6 Set Time Run Set Time Set Ch.2 12 3 12 3 Run Output Verify Cancel Set Verify Cancel Auto Off Manual 0 0 Programme 10 3 Function 3 Position 3 Position 10 3 Function 3 Position 4 Position Numeric Keypads Keyswitch Selector Numeric Keypads Keyswitch Selector Keypads Keypads Switch Switch DESCRIPTION TIME OF DAY Model 841 is a single channel unit. The mains electricity supply must be ON, the key inserted and turned Model 842 us a two channel unit. The two channels operate totally to Set Time position before carrying out the operations detailed below. independently of each other and can have different programmes set. When the timeswitch is first connected, or when the battery has been Both the models have a number of common features as described allowed to discharge fully, and the mains electricity supply is switched below: ON a dash (-) will be displayed in each of the five digit positions. The Day and Time are displayed as five digits on the liquid crystal Decide which day of the week you wish to assign as Day 1. display (LCD) Press the number key representing the current day of the week (listen The first digit in its separate window marked Day will ne numerical for the bleep). from 1 to 7 which may be allocated in sequence to the days of the Key in the time using four keypads e.g. 8:30 a.m. must be keyed as week at the users discretion. The normal convention is Monday = 1, Tuesday = 2 ......... Sunday = 7. The remaining four digits in the window marked Time will display the 08 3 0 time to a resolution of one minute from 0000 to 2359. A short bleep will be heard a keypad is pressed. In addition when a numeric keypad is pressed the associated digit on the LCD will either blink or change. and 6:15 p.m. as The 3 position selector switch (one for each channel on Model 842) may be set to Off to override the programmes or may be set to Auto to follow the programme which has been set, the third position marked 18 1 5 Manual is a continuous ON but only as long as the switch is held down. The output status indicator light will be illuminated when the selector The unit will not allow the entry of a spurious day or time e.g. day 8 switch is at Auto and a programme event occurs, or when the selector will not be accepted nor will a time entry of 3600. Depression of an switch is held in the Manual position. out of range key will not register on the display the LCD digit will blink The unit can be set at time of installation to provide either an On but remain unchanged until an acceptable number is keyed. duration from 1 to 15 seconds in half second pulses, or a continuous pulse from 1 to 15 seconds. (In the case of Model 842 each channel can be set to different pulse types but of the same duration). DO NOT PRESS ANY FUNCTION KEYPADS. It is recommended that the key be removed from the keyswitch to prevent unauthorised or accidental changes to the settings. The key Returning the key to the Run position will enter the time shown on the can only be removed when in Run position. display. 1SETTING SWITCHING TIMES The mains electricity supply must be ON, the key inserted and turned For Model 842 only: Having completed the programme setting for to either the Set Programme position (Model 841) or Set Channel 1 Channel 1, turn the key to Set Channel 2 and enter the programme position (Model 842) before carrying out any operations detailed below. required for this channel in the same manner. Initially the display will show Note: The 200 switching operations are able to be freely spread over both channels. If a common event time is required on both channels this represents only on switching operation. E E E E E The complete programme may be checked by the use of the Verify key. Each press of this key will advance the programme by indicating that the memory is empty. one event allowing a complete review in chronological sequence Since the timeswitch is capable of automatically carrying out up to commencing from the day and time on display. If a particular days 200 switching operations it is recommended that the required programme is to be reviewed then key the day number followed by programme be tabulated before setting is commenced, noting that the day number on display is the current day of the week. A table is 000 0 & Verify provided for this purpose. In addition, facilities are provided to record the programme(s) entered on the enclosed card, which can be located adjacent to the unit if required. when the first programmed event for that day will be displayed then It is not essential to key in the programme in sequence since it will proceed with repeated presses of the Verify key. automatically be sorted into chronological order. When re-programming one or more events, unwanted events must be cleared by advancing to the event in question using the To set a programme event: Verify key as explained above and then clearing it by a single press on the Cancel key. First press the number key representing the day of the week to be programmed. In the case of Model 842 both the Verify and Cancel functions apply only to the channel selected by the keyswitch at that time. Secondly, key in the time using four numeric keypads in the range 0000 to 2359. To clear the entire programme on both channels, press and hold down the Cancel key for approx. 3 seconds until the display shows Finally press Enter 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 E E E E E out of range key will not register on the display the LCD digit will blink but remain unchanged until an acceptable number is keyed. On completion of programming return the key to Run and the selector Proceed with the programming of every event using the same entry switch(es) to Auto. sequence. If an attempt is made to exceed 200 programme events then the BATTERY RESERVE display will show The unit does not rely on the internal battery in order to work F F F F F satisfactorily providing the mains power supply is connected to the unit. The battery is fitted purely to memorise the Time of Day and indicating that the memory is full. selected Switching Times in the event of a power failure or disconnection of supply. If an incorrect key is pressed then press the Cancel key and re- commence the sequence. When the unit is first connected it will require a minimum of 24 hours to become sufficiently charged in order to perform this memory If a programme event is repeated at the same time on different days function. Thereafter the battery is automatically recharged. then the keyring may be simplified as follows. If the mains power supply is lost, for any reason, the display on the Key in the first event using the normal entry sequence. Now simply unit will go out. The battery will maintain the memory for a period of key in the new day number and then Enter . 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. Example Monday Tuesday Wednesday Thursday Friday Saturday Sunday Assigned Day No. 1 2 3 4 5 6 7 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 Event Time 0845 0845 0845 0845 0845 0845 0845 etc. etc. etc. etc. etc. etc. etc. 0910 0910 0900 0900 0900 0900 0925 0915 0915 1230 1300 1230 1300 1230 1330 1530 1530 1530 1530 Example Monday Tuesday Wednesday Thursday Friday Saturday Sunday Assigned Day No. CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 CH1 CH2 Event Time 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 specifications already agreed. Danfoss Randall Ltd, Ampthill Road, Bedford MK42 9ER. Tel: (01234) 364621 Fax: (01234) 219705 Email: danfossrandall danfoss.com Website: www.danfoss-randall.co.uk 2 Part No: 3282 Issue 7 10/99