Horstmann C27 - Two Channel Programmer Manual

INTRODUCTION

Horstmann's C27 - Two Channel Programmer Offers up to three programmed operating periods per day, seven days a week, with Hot water Boost and Heating Advance control on a fully pumped system.

The following are some of the easy to operate features: -
Flexible 7 Day Control
1 Hour Boost on Hot Water
Independent timing on Hot Water and Heating
Central Heating Avance gives instant On/Off override
Up to 3 On/Off periods per channel in each 24Hr operation.
Programme options: Auto / All Day / 24 Hours / Off

FRONT VIEW OF THE DEVICE

1. SET indicator
2. Time of day
3. Switch Period symbol
4. SET Button
5. Hot water BOOST or adjust (-) button
6. Central heating ADVANCE or adjust (+) button
7. Hot water (HW) select or ENTER Button
8. Central heating (CH) select or COPY button
9. Hot water ON indicator
10. Central heating ON indicator
11. SET positions
12. PROGRAMME positions
13. BOOST symbol
14. ADVANCE symbol
15. AM/PM symbol
16. Day of week indicator
17. PROGRAMME indicators

RESETTING THE UNIT

Electronic equipment can in some circumstances be affected by electrical interference. If the programmer's display becomes frozen or scrambled; or if you wish to revert back to the default time settings please use the following procedure.

Press the SET and CH buttons together then release the buttons and the programmer will return to preset factory settings.

The simple instructions below are designed to help with the programming of the unit.

SETTING DAY AND TIME OF DAY

1. Press the SET button until the SET indicator is next to the CLOCK position.
2. Use PLUS and MINUS buttons to adjust day
3. Press ENTER
4. Use PLUS and MINUS buttons to adjust time
   
5. Press ENTER
6. Press the SET button until the SET indicator is next to the RUN position.

DEFAULT TIME SETTINGS

The default factory settings are shown, however if you wish to change these proceed as instructed below.

The default factory settings are shown, however if you wish to change these proceed as instructed below.

SETTING THE ON AND OFF TIMES

INFORMATION AND ADVICE

Programming ON/OFF times
If a Heating or Hot water period is not required it can be cancelled by setting the ON and OFF settings to the same time. Example ON 10:00am OFF 10:00am

FULLY PUMPED OR GRAVITY SYSTEM

The installer will have set the programmer to suit the installed system. If this is a Fully pumped system this will allow independent control of the Central heating and Hot water, however on a Gravity system the Central heating and Hot water are linked so that it is not possible to use the Central heating independently.
This will allow only one common time setting for both Hot Water and Central Heating.

SPECIAL FEATURES

The SET indicator must remain in the RUN position for the following instructions.
The following actions work independently on either Hot Water or Central Heating.

BOOST FUNCTION

1hour temporary override
Press BOOST button:
Your Hot Water will be Boosted for 1 hour

At any time during a BOOST period press BOOST again to return to normal programming

ADVANCE FUNCTION

Brings forward next ON or OFF operation

1. Press ADVANCE button to move to the next Heating ON/OFF time
2. To cancel the advance press the ADVANCE button again. This will return the unit to its normal programme
   

BATTERY

The programmer is fitted with a non-rechargeable, long life battery, which will maintain the programmed time settings for a minimum of ten months with the supply disconnected.
THIS SHOULD BE SUFFICIENT TO COVER POWER INTERRUPTIONS DURING THE LIFE OF THE UNIT.
During power interruptions the display will be blank, after 3 days the current time of day will be lost.
These measures are to prolong the battery life.

SERVICE AND REPAIR

This programmer is NOT user serviceable. Please do not dismantle the unit.
In the unlikely event of a fault developing please refer to the RESETTING THE UNIT section. If this fails to resolve the problem please contact a local heating engineer or a qualified electrician.

QUESTIONS AND ANSWERS

The unit display has become frozen	This could be due to local electrical interference Using the RESET procedure may rectify the fault.
The indicator neon fails to illuminate on Hot water or Central heating channel	Using the RESET procedure may rectify the fault. If the problem persists the programmer will need replacing.
The indicator neon will illuminate but the pump and/or boiler fails to operate	This may indicate a problem elsewhere in your system; E.g. A zone valve, etc. please contact a registered installer for advice.
There is no display on the unit	Try the RESET procedure, if this fails to rectify the problem please have the mains supply checked
How do I know if the programmer is still under warranty	The CentaurPlus range comes with a 2 year guarantee from the date of manufacture. This date is located on the rear of the unit, indicated by a month over a year
How is the unit removed from the wall	The CentaurPlus programmer must only be removed from it's backplate by either a qualified electrician or heating engineer; The programmer plugs in to a 6 pin backplate located on the rear of the unit and is secured using 2 screws located on the bottom surface of the unit. Undo these screws and pull forward and up in an arc motion

Email: sales@horstmann.co.uk
Website: www.horstmann.co.uk;

Horstmann Controls Limited
Bristol

Documents / Resources

References

• http://www.horstmann.co.uk

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