SECURE CentaurPlus C27 Series 2 Two Channel Central Heating and Hot Water Programmer Instruction Manual

CentaurPlus C27 Series 2
User Operating Instructions

Two-Channel Central Heating
and Hot Water Programmer

The CentaurPlus C27 two-channel programmer gives independent control over hot water and heating with up to 3 ON / OFF settings for each day of the week. It also has a 1-hour manual boost button for the hot water and an advance button for the central heating.
There is also a programming switch allowing permanent selection of: OFF / ON / AUTO / ALL DAY.

The CentaurPlus C27 Programmer

The simple instructions contained in this user guide are designed to help with the programming and operation of the unit.

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) or ENTER button
8. Central Heating (CH) or COPY button| 9 Hot water ON indicator
10 Central heating ON indicator
11 SET positions
12 PROGRAMMEpositions
13 BOOST symbol
14 ADVANCE symbol
15 AM/PM symbol
16 Day of the week indicator
17 PROGRAMME indicators
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Fully Pumped or Gravity System

The installer will have set the programmer to suit the installed system. This is normally a Fully Pumped system which will allow independent control of the central heating and hot water, however on an old Gravity system the central heating and hot water are linked so 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 and will become apparent when setting the ON and OFF times as both will be indicated together.

Manual Overrides

Boost Function – 1 Hour Temporary Override (Hot Water Only)
The boost facility will allow the user to boost the hot water channel which is currently ‘OFF’ for 1 hour. To indicate the boost being activated BOOST will be shown on the display for the duration of the boost period. The hot water channel ON indicator will also be illuminated.

Advance Function – Brings Forward The Next On or Off Operation (Central Heating Only)
The advanced facility will allow the user to switch the central heating channel ‘ON’ which is currently ‘OFF’ or switch the central heating channel ‘OFF’ which is currently ‘ON’. To indicate the advance feature being activated ADVANCE will be shown on the display until the next program switching time. The central heating ON indicator will also be illuminated.

Program Override Facilities

With the CentaurPlus C27 operating in the normal running mode, it is possible to alter the functionality of the program on each individual channel by means of the CH and HW buttons.
The options include;
Auto – Channel follows all programmed ‘ON’ and ‘OFF’ times.
All-day – Channel operates from 1st ‘ON’ time until 3rd ’OFF’, ignoring all switching times in between.
24hrs – Channel will be constantly ‘ON’.
Off – Channel will be constantly ‘OFF’, there is the ability to turn off the heating during the summer without altering the program times. On the hot water channel, the boost is still available. As both channels are totally independent it is possible to have them set differently if necessary.

All of the settings above will be permanent, i.e. unaffected by program times, until alteration by the user.
The diagram below illustrates how to alter the setting, it assumes that the channel is in the AUTO mode to begin with.

Setting Time of Day and Date

The CentaurPlus C27 has a built-in clock and calendar. This will mean that you will need to enter the date as well as the time on the initial setup or if the factory reset has been used. Having done this, the clock will automatically adjust for BST/GMT time changes throughout the year.

Setting the On and Off Times

To alter these settings please proceed as follows:-

Default Time settings

The default time settings shown above are preset at the factory
NB. The factory default settings for the 2nd ON/OFF times are both set at 12:00 pm (midday) which cancels this ‘ON’ period giving 2 ON/OFF periods for the day. If a midday ‘ON’ period is required set the 2nd ON and OFF times accordingly. If not press ENTER twice.

Resetting the Programmer

Resetting the Programmer 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 reset by pressing the SET and CH buttons together as shown below.
After initial installation it is advisable, before programming the CentaurPlus C27 for the first time, to reset the unit. Resetting can only be achieved with the power ‘ON’ by pressing the SET and CH buttons together. This will return the programmer to the factory-set default times.

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

General Information

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 PROGRAMMER section of this user guide shown above. If this fails to resolve the problem please contact a local heating engineer or a qualified electrician.

Secure Meters (UK) Ltd
Secure House, Lulworth Close,
Chandler’s Ford,
Eastleigh, SO53 3TL, UK
t: +44 1962 840048 f: +44 1962 841046
www.securemeters.com

Part Number P84363 Issue 8

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