Horstmann CentaurStat 7 Betriebsanleitung

Central Heating Programmable Room ThermoStat

The Centaurstat 7 is a programmable room thermostat that provides

precise temperature control from a single point with up to 6 different

temperature settings possible every 24 hours on a 7 day, weekly cycle.

Temporary temperature adjustments can be made by means of the

temperature override buttons on the front of the unit.

CentaurStat 7

User Operating Instructions

The CentaurStat 7 Programmable ThermoStat

The simple instructions contained in this user guide are designed to help with the

programming and operation of the unit.

1 SET indicator

2 SET positions

3 SET button

4 OVERRIDE (MINUS) button

5 OVERRIDE (PLUS) button

6 ENTER button

7 Time or current temperature display

8 Target temperature

9 System ON symbol

10 Day of week indicator

11 PM indicator (no display for AM)

12 Temperature lock symbol

1 10 7

Located under ap

Target Temperature Override

Where an override temperature has been set, this altered setting will remain until the next

time and temperature setting is reached.

Target Temperature Lock

The temperature lock facility allows you to ‘lock in’ the target or override

temperature of the current heating period.

With the SET indicator in the RUN position press the ENTER button. The temperature

lock symbol will appear on the right hand side of the display. All control buttons

other than the ENTER button will be inoperative.

The locked temperature will now override all other temperature settings until the

lock is cancelled.

To cancel the temperature lock, and return to normal settings, simply press the

ENTER button.

If an override temperature had been

set before the lock was activated, the

altered setting will remain until the next

switching period is reached.

Manual Overrides

Ensure the SET

indicator is in the

normal RUN position

Use the PLUS and

MINUS buttons

to increase or

decrease settings

The CentaurStat

will operate on

this new setting

until the next time

period

 

Setting the Time of Day

When setting the time or altering the temperature settings, if a period exceeding

65 seconds is allowed to elapse between button presses then the CentaurStat will

automatically return to the run position. Any alterations made since the last press of the

ENTER button will not be recognised.

Time and Temperature Settings

The CentaurStat 7 has

six temperature settings

per 24 hours.

These all have different

start times and temperature

settings. The default

factory settings are shown

opposite. Should you want

to alter these default times

and temperatures, proceed

as per the instructions on

page 5.

Display Features

The CentaurStat has two user displays, by pressing the PLUS and MINUS buttons

simultaneously, the user can toggle between either Display 1 or Display 2.

Press the

SET button

until SET

indicator is

next to clock

position on

the display

Use the

PLUS and

MINUS

buttons

to adjust

the day

Use the

PLUS and

MINUS

buttons

to adjust

the time

Press

ENTER

Press

ENTER

Press the

SET button

until SET

indicator

is returned

to the RUN

position

   

Monday - Friday

Period Times Temps.

1 6:00am 20ºC

2 8:30am 18ºC

3 11:30am 20ºC

4 1:30pm 18ºC

5 5:00pm 21ºC

6 10:00pm 15ºC

Saturday/Sunday

Period Times Temps.

1 7:00am 20ºC

2 10:00am 18ºC

3 11:30am 21ºC

4 1:30pm 18ºC

5 5:00pm 21ºC

6 11:00pm 15ºC

DEFAULT SETTINGS

Display 1 - Shows current time

and target temperature

Display 2 - Shows current and

target temperature

Changing the Times and Target Temperatures

Press the SET button

until the SET indicator is

next to PROG position

Use the PLUS button

to select a day to copy

the programme to

Repeat for remaining

5 time and

temperature periods

The day setting indicator

will now flash. Use the PLUS

and MINUS buttons to alter

the day to be programmed

Press the SET

button until the SET

indicator is returned

to the RUN position

The time setting for the

1st period will now flash.

Use the PLUS and MINUS

buttons to alter the start

time if required

Repeat for all days that

require this programme.

The day indicator will remain

illuminated for days which

have already been copied to

To programme the remaining

days if alteration to preset

times are required,

press ENTER and go to A

or go to C to finish

The copy indicator will now illuminate, this will

allow the complete programme to be duplicated

into any or all of the remaining days:

Go to B to continue or go to C to finish

If the copy feature is not required press ENTER

and go to A to programme the remaining days

or go to C to finish

The target temperature

setting for the 1st period

will now flash. Use the

PLUS and MINUS buttons

to alter the target

temperature if required

Press ENTER

Press ENTER Press ENTER

Press ENTER

 







 



Reducing the Number of Time and

Temperature Settings

To reduce the number of temperature settings available in a day from six to four, proceed

as follows:

Set the 3 and 4 period temperatures to the same temperature as set on period 2.

Periods 1 and 2 will now operate as normal.

For two settings per day, set the temperature on periods 2, 3, 4 and 5 to the same

temperature as set on period 1.

For one setting per day use the Target Temperature Lock procedure located on page 3

of this user guide.

Battery Replacement

Your CentaurStat is battery operated. The batteries

supplied with the unit should last for approximately

two years.

When the batteries are nearing the end of their life

a BATTERY LOW symbol will ash on the display (see

diagram opposite).

Isolate any external electricity supply to your CentaurStat

before replacing the batteries

Press the RELEASE BUTTON on the right hand side of the unit and swing the front cover

away from the mounting plate by gently pulling on the right.

Remove the old batteries (with the batteries removed your CentaurStat will retain its

programme for approximately ve minutes) and replace them with three new AA size

alkaline batteries, ensure they are tted correctly as shown on the label positioned

between the battery terminals (see diagram).

Once batteries have been tted, offer the left hand side of the unit up to the mounting

plate ensuring that the two guide lugs are tted into the corresponding slots in the side of

the mounting plate.

Now swing the right hand side of the CentaurStat up against the mounting plate until the

release button clicks into place. After a few seconds the display will automatically return to

your CentaurStat.

PLEASE NOTE:

If the battery tting time has exceeded ve minutes some time and temperature

adjustment may be necessary, please refer to the relevant sections located on page 4 and

5 of this user guide.

Resetting the CentaurStat

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.

Lower the ap and press the SET and ENTER buttons together,

release the buttons and the CentaurStat will return to preset

factory default time settings.

Service and Repair

This product is NOT user serviceable. Please do not dismantle the unit.

In the unlikely event of a fault developing please refer to the RESETTING THE CENTAURSTAT

section of this user guide located above. If this fails to resolve the problem please contact

a local heating engineer or a qualied electrician.

Battery Replacement Diagrams:

Email: [email protected].uk

Website: www.horstmann.co.uk

Horstmann Controls Limited, Bristol BS4 1UP

Leaflet number P82162 – Issue 3

... an explantion for householders.

A programmable room thermostat is both a programmer and a room thermostat.

A programmer allows you to set ‘ON and OFF’ time periods to suit your own lifestyle.

A room thermostat works by sensing the air temperature, switching on the heating when the air temperature

falls below the thermostat setting and switching it off once the set temperature has been reached.

So, a programmable room thermostat lets you choose what times you want the heating to be on, and what

temperature it should reach while it is on. It will allow you to select different temperatures in your home at

different times of the day (and days of the week) to meet your particular needs.

Turning a programmable room thermostat to a higher setting will not make the room heat up any faster. How

quickly the room heats up depends on the design of the heating system, for example, the size of the boiler and

radiators.

Neither does the setting affect how quickly the room cools down. Turning a programmable room thermostat to a

lower setting will result in the room being controlled at a lower temperature, and saves energy.

The way to set and use your programmable room thermostat is to find the lowest temperature settings that you

are comfortable with at the different times you have chosen, and then leave it alone to do its job. The best way

to do this is to set low temperatures first, say 18ºC and then turn them up by one degree each day until you are

comfortable with the temperatures. You won’t have to adjust the thermostat further. Any adjustments above

these settings will waste energy and cost you more money.

If your heating system is a boiler with radiators, there will usually be only one programmable room thermostat to

control the whole house. But you can have different temperatures in individual rooms by installing thermostatic

radiator valves (TRVs) on individual radiators. If you don’t have TRVs, you should choose a temperature that is

reasonable for the whole house. If you do have TRVs, you can chose a slightly higher setting to make sure that

even the coldest room is comfortable, then prevent any overheating in other rooms by adjusting the TRVs.

The time on the programmer must be correct. Some types have to be adjusted in spring and autumn at the

changes between Greenwich Mean Time and British Summer Time.

You may be able to temporarily adjust the heating programme, for example, ‘Override’, ‘Advance’ or ‘Boost’.

These are explained in the manufacturer’s instructions.

Programmable room thermostats need a free flow of air to sense the temperature, so they must not be covered

by curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent the

thermostat from working properly.

What is a programmable room thermostat?

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