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Horstmann 425 Coronet User Operating Instructions Manual
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Horstmann 425 Coronet User Operating Instructions Manual

Electro-mechanical timeswitch
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User Operating Instructions
Horstmann 425 Coronet
Electro-mechanical Timeswitch
The Horstmann 425 Coronet timeswitch is a single circuit central heating
timeswitch able to switch ON and OFF twice every 24 hours. An advance
switch is provided to make temporary overrides to the ON or OFF periods
and a selector switch gives a further choice of programmes.
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Summary of Contents for Horstmann 425 Coronet

  • Page 1 Horstmann 425 Coronet Electro-mechanical Timeswitch The Horstmann 425 Coronet timeswitch is a single circuit central heating timeswitch able to switch ON and OFF twice every 24 hours. An advance switch is provided to make temporary overrides to the ON or OFF periods...

  • Page 2: Product Overview

    The 425 Coronet Timeswitch The simple instructions contained in this user guide are designed to help with the programming and operation of these units. DIAL PROGRAMME TAPPETS SELECTOR TIME POINTER ADVANCE CONTROL...

  • Page 3: Setting The On/Off Times

    SETTING THE TIME OF DAY The dial rotates clockwise and makes one complete revolution every 24 hours. To set the correct time turn the dial clockwise by hand (using the levers on the clock face) until the correct time of day is against the line marked TIME.

  • Page 4: Advance Control

    Manual Overrides ADVANCE CONTROL The advance control allows you to start an ON or OFF period early without altering the tappet, time or programme selection settings. Moving the advance control to the extreme right brings forward the operation of the next tappet. The switch state indicator then changes to the appropriate number. When the next tappet passes the time line, normal operation returns.

  • Page 5: Programme Override Facilities

    PROGRAMME OVERRIDE FACILITIES The following programme options are available: 24 Hrs - The system will be permanently ON All Day - The system will switch ON from tappet 1 (red) and OFF at tappet 4 (blue) Tappets 2 and 3 are ignored Twice - The system switches ON at tappet 1 (red), OFF at tappet 2 (blue), ON at tappet 3 (red) and OFF at tappet 4 (blue)

  • Page 6: What Is A Programmer

    This programmer is NOT user serviceable. Please do not dismantle the unit. In the event of a fault developing please contact a local heating engineer or a qualified electrician Horstmann Controls Limited South Bristol Business Park, Roman Farm Road, Bristol BS4 1UP E-mail: sales@horstmann.co.uk...