ThermoTex CoziStat Installation Instructions & Operating Manual Download Page 6

Disclaimer: Any information given is believed to be reliable. However, users should treat this information as a guideline, and independently evaluate the suitability of the product for their particular 

application. Thermotex Engineering Limited makes no warranties as to the accuracy and completeness of the information and disclaims any liability regarding its use.

Thermotex Engineering Ltd

, 1a Broom Business Park, Broom Bank Road, Chesterfield S41 9QG 

T:

 +44 (0) 1246 453 769  

 

F:

 +44 (0) 1246 454 988   

E:

 [email protected]   

W:

 www.thermotex.co.uk

Revision 1.01

C O Z I S T A T   I N S T A L L A T I O N   I N S T R U C T I O N S   &   O P E R A T I N G   M A N U A L

10

.

Advanced Settings

1. Temperature Compensation in internal sensor

Ensure the Display reads '01 -1'

2. Deadzone Temperature

 / Switching Tolerance

Switch the CoziStat Display OFF. Press and hold both the         

and          buttons at the same time for approximately 3 

seconds to enter the Advanced Settings Menu. The display 

should read '01 -1'. Press          to change between the 

M

enu 

O

ption number on the left of the display, and use the up and 

down arrow keys to switch between the options on the right 

of the display.

 See below for explanations of the Menu 

Options.

Options: 01

, 02, 03, 04, 

05

'

01

'

 means that the tolerance will be set to 1

o

C (

'

02

'

 means that 

the tolerance will be set to 2

o

C, and so on).

A 1

o

C tolerance means that the thermostat will switch the heater 

ON when the Room Temperature falls 1

o

C or more below the Set 

Temperature. Similarly, the thermostat will switch the heater OFF 

when the Room Temperature rises 1

o

C or more above the Set 

Temperature.

A 2

o

C tolerance means that the thermostat will switch the heater 

ON when the Room Temperature falls 2

o

C or more below the Set 

Temperature. Similarly, the thermostat will switch the heater OFF 

when the Room Temperature rises 2

o

C or more above the Set 

Temperature.

We recommend setting the tolerance at 

'

01

'

. To do this e

nsure 

the Display reads '0

2

 

0

1'

.

3

.

Sensor Type

Options: 

In, Ou, AL

'

In' refers to the internal sensor in the thermostat. This measures 

the room (air) temperature only, not the floor temperature.

'Ou' refers to the external sensor installed in the floor. This 

measures the floor temperature only, not the air temperature.

'AL' refers to the internal sensor measuring the room (air) 

temperature and the external sensor used to limited the floor 

temperature.

Using CoziStat to control underfloor heating, we recommend 

you use the external sensor at all times. To do this ensure the 

Display reads '03 Ou'.

4

.

Low Temperature Protection

Options: 5, 6, 7, 8, 9, 10, - -

'5' means that low temperature protction is set to 5

o

C. If the 

Room Temperature drops below 5

o

C the thermostat will switch 

the heating ON to maintain a minimum of 5

o

C. This Low 

Temperature Protection Setting can be set to switch the 

thermostat ON between 5

o

C and 10

o

C. Select '- -' to cancel the 

Low Temperature Protection Setting.

5

.

High Temperature Protection

Options: 35-70*, - -

*DO NOT SET THE HIGH TEMPERATURE PROTECTION

SETTING HIGHER THAN 45 (45

O

C)

'35' means that high temperature protction is set to 35

o

C. If the 

Temperature reading rises above 35

o

C the thermostat will 

switch the heating OFF to maintain a maximum of 35

o

C. Use this 

High Temperature Protection Setting to switch the thermostat 

OFF between 35

o

C and 45

o

C.

6

.

Button Locking

Ensure the Display reads '0

6

 

0

'

7

.

Weekend Setting

Options: 2 day weekend, 1 day weekend, no weekend

'MON TUES WED THURS FRI' displayed across the top of the 

screen means a 2 day weekend is selected.

'MON TUES WED THURS FRI SAT' displayed across the top of 

the screen means a 1 day weekend is selected.

'MON TUES WED THURS FRI SAT SUN' displayed across the 

top of the screen means no weekend is selected (i.e. one 

heating programme which is the same every day)

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