EPH Controls E 15402 Mode d'emploi - Page 2

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CDT2-DS Room Thermostat

10. High and Low temperature limitation

An upper and lower temperature limit may be chosen.

Set

Press and hold the

and

"Limit OFF" will appear on the screen.

Press the

button to select "Limit ON" mode.

Set

Press the

button to con rm you wish to adjust the high limit temperature.

Press the

and

buttons to select the high limit temperature.

Press the

Set

button to select the low limit temperature mode.

Press the

and

buttons to select the low limit temperature.

Set

Press the

button and the thermostat is ready for operation.

"Limit" will appear on the screen.

To deactivate High and Low temperature limitation.

Set

Press and hold the

and

"Limit ON" will appear on the screen.

Press the

button to deactivate this function.

"Limit OFF" will appear on the screen.

Press the

Set

button and the thermostat is ready for operation.

11. Adjusting the switching di erential (Nor + DS)

Set

Press the

button once, Di set will appear on the screen.

The factory default switching di erential of 0.4 C will appear on the screen.

Press the

and

buttons to select the desired di erential from 0.2 - 1˚C.

Set

Press the

button to return to normal operation.

12. Adjusting the setpoint temperature

Press the

buttons to adjust the temperature setpoint.

13. Change the thermostat mode

a.) Nor - Normal On/O mode

b.) D.S. - Delay Start mode

c.) TPi - Time, Proportional, Integral mode

Slacken the fastening screw on the bottom of the thermostat with a

philips head screwdriver.

The thermostat is hinged and can be opened 180 degrees.

On the printed circuit board, you will see jumper, JP3 which has 4 pins.

The default position is the middle two pins which is Normal On/O mode.

Pull out the jumper and insert it in the top two pins for TPI control or insert

it in the bottom two pins for Delay Start control.

Close the thermostat and tighten the fastening screw.

Once the jumper has been changed the thermostat must be reset for

these changes to become e ective. (See section 8.)

buttons for 10 seconds.

EPH Controls Ireland

Sitecast Industrial Estate, Pouladu ,

Cork, T12 W665, Ireland

[email protected] www.ephcontrols.com

Hardwired

14. On/O control mode (Nor)

OFF

When the temperature falls below the setpoint temperature, the ame

symbol

When the temperature rises above the setpoint temperature, the ame

symbol

Temp

22˚C

21˚C

20˚C

19˚C

18˚C

17˚C

15. Delay start control mode (D.S.)

Delay start is an energy saving mode.

When the delay start function is active the ame symbol will continuously

ash on the screen. When in this mode the activation of the thermostat is

delayed by a variable time depending on the current temperature, setpoint

temperature and also the fall in temperature from when the delay start has

activated. See graph (15.1) Delay Start Control.

48.0

42.0

36.0

30.0

24.0

18.0

12.0

6.0

0.0

The ame symbol

When activated the thermostat will allow the heating system time to reach

the setpoint and delay start will remain inactive until it reaches this setpoint.

Delay start can be reactivated by:

Lowering the setpoint below the current temperature, pressing the set button

twice to set the temperature, then raising the setpoint above the zone

temperature.

The heating will be delayed as per the line on the graph.

If the di erence between the actual temperature and the setpoint is 1 C the

thermostat will delay starting for circa 40 minutes.

If the di erence between the actual temperature and the setpoint is 3 C the

thermostat will delay starting for circa 24 minutes.

If the di erence is 6 C or more, the heating will be switched on immediately.

The time delay will change if the temperature drops from the original

calculation.

To deactivate Delay Start, loosen the xing screw and change the position of

the jumper JP3. Change the position of the jumper to TPI or Nor.

EPH Controls UK

Unit E4, Welland Business Park, Valley Way, Market Harborough,

Leicestershire, LE16 7PS, United Kingdom

[email protected] www.ephcontrols.co.uk

Page 2 of 3

Operating Instructions

will appear and the thermostat will switch on.

will disappear and the thermostat will switch o .

Graph (14.1): On / O Control

Graph (15.1): Delay Start Control

Temperature below thermostat setting °C

will continue to ash until the thermostat activates.

Setpoint Temperature

Time Minutes

100