Danfoss 841 instruction manual

Timer Danfoss Installation And User Manual Electro-mechanical 24 hour timeswitch for controlling hot water and heating 16 pages. Electronic timeswitch for heating and hot water 16 pages.

The mains electricity supply must be ON, the key inserted and turned to Set Time position before carrying out the operations detailed below. The two channels operate totally independently of each other and can have different programmes set. Page 2 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 manual is also suitable for: Print page 1 Print document 2 pages. Rename the bookmark. Delete bookmark? Cancel Delete. Seven Da y Pulsed Electronic Timeswitch. Model - T wo Channel. The mains electricity supply must be ON, the k ey inserted and turned to Set.

Time position before carrying out the operations detailed below. Decide which day of the week you wish to assign as Da y 1. Press the number key representing the curr ent day of the week listen for.

In addition when a numeric keypad is pressed the associated digit on the LCD will either blink or change. The 3 position selector switch one for each channel on Model 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 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 switch is at Auto and a programme event occurs, or when the selector switch is held in the Manual position. The unit can be set at time of installation to provide either an On duration from 1 to 15 seconds in half second pulses, or a continuous pulse from 1 to 15 seconds.

In the case of Model each channel can be set to different pulse types but of the same duration. 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. When the timeswitch is first 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 five digit positions.

Decide which day of the week you wish to assign as Day 1. 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. Returning the key to the Run position will enter the time shown on the display. Since the timeswitch is capable of automatically carrying out up to 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. 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. 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 to Finally press Enter to enter the required event into the memory. Proceed with the programming of every event using the same entry sequence.

When re-programming 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. In the case of Model both the Verify and Cancel functions apply only to the channel selected by the keyswitch at that time. To clear the entire programme on both channels, press and hold down the Cancel key for approx.

If an incorrect key is pressed then press the Cancel key and re-commence the sequence. If a programme event is repeated at the same time on different days then the keying may be simplified as follows.

Key in the first event using the normal entry sequence. T he battery is. Thereafter the battery is automatically recharged. If the mains power supply is lost, for any r eason, the display on the unit.

T he battery will maintain the memor y for a period of up t o 3. When the po wer supply is restored , the unit. Danfoss Randall can accept no responsibility for possible errors in catalogues, brochures and other printed material.

Danfoss R andall reserves. This also applies to pr oducts already on order provided that such alterations c an be made without. T el: F ax: Email: [email protected].

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