EPH Controls CP4M Operating Instructions Manual

CP4M Room Thermostat

Hardwired Open Therm®

Contents

1. LCD symbol / button description

2. Resetting the thermostat

3. Setting the date, time and operating mode

4. Factory program settings

5. Adjusting the program settings for 5/2d

6. Copy function

7. Temporary override

8. Permanent override

9. Boost function

10. Holiday function

11. Keypad lock and unlock

12. Backlight mode selection

13. Frost protection

14. Installer Menu (without OpenTherm® connected)

15. Installer Menu (with OpenTherm® connected)

Boiler Plus

Page 1 of 4

Operating Instructions

CAUTION!

Before commencing, disconnect the

device from the mains. There are parts that
carry mains voltage behind the cover. Never
leave unsupervised when it is open. (Prevent
non specialists and especially children from
gaining access to it.)

Never remove this product from the electrical
baseplate. Disconnect from mains supply in the
event of any damage to any buttons. Do not
use sharp tools to push any button.

How your programmable thermostat works

When the thermostat is in the AUTO mode, it will operate according to the
times and temperatures that have been programmed. The user can select
from 6 dierent programs per day - each with a time and a temperature.

There is no OFF time, only a higher and a lower temperature setpoint.

If the user wants the thermostat to be OFF at a certain time, set the
temperature for this time to be low. The thermostat will turn ON if the room
temperature is lower than the setpoint for the current period.

Example: If P1 is set to be 21˚C at 6am, and if P2 is set to be 10˚C at 8am, the
thermostat will look for the temperature to be 21˚C between 6am and 8am.

1. LCD Symbol / button description

1.1 LCD Symbol description

Current program

Day / Month

Current Time

(Boost to time)

1.2 Button description

Day of the week

Operating mode

Temperature

Heating on symbol

Keypad lock symbol

Prior to setting the thermostat, it is neccessary to
complete all required settings described in this section.

3. Setting the date, time and operating mode

Press the ‘TIME’ button once, the year will begin ashing.

Press the or buttons to adjust the year. Press the ‘OK’ button.

Press the or buttons to adjust the month. Press the ‘OK’ button.

Press the or buttons to adjust the day. Press the ‘OK’ button.

Press the or buttons to adjust the hour. Press the ‘OK’ button.

Press the or buttons to adjust the minute. Press the ‘OK’ button.

Press the or buttons to adjust from 5/2d to 7d or 24h mode.

Press the or buttons to turn DST (Day Light Saving Time) On or O.

Press the ‘AUTO’ button or wait 5 seconds and the thermostat will return to
normal operation.

4. Factory program settings 5/2d

Mon-Fri

Sat-Sun

P1 P2 P3 P4 P5 P6

06:30

21˚C 10˚C 10˚C 10˚C 21˚C 10˚C

08:00 10:00 12:00 14:00 17:30 23:00

21˚C 10˚C 10˚C 10˚C 21˚C 10˚C

08:00

12:00

5/2D

14:00

17:30

22:00

Automatic
mode

(Back)

Manual
mode

O mode

Program mode

AUTO MAN OFF PROG

HOL COPY

TIME

BOOST

2. Resetting the thermostat

Press the button on the side of the thermostat.

‘rst no’ will appear on the screen.

Press the button.

‘rst yes’ will appear on the screen.

Press the ‘OK’ button to reset the thermostat.

RESET

EPH Controls Ireland

[e-mail] www.ephcontrols.com

Set point increase

Set point decrease

Reset button

OK

OK conrm button

Boost mode

Copy function

Holiday mode

Time / date

Mon-Fri

Sat-Sun

Everyday

5. Adjusting the program settings for 5/2d

P1 P2 P3 P4 P5 P6

06:30

21˚C 10˚C 10˚C 10˚C 21˚C 10˚C

08:00 10:00 12:00 14:00 17:30 23:00

21˚C 10˚C 10˚C 10˚C 21˚C 10˚C

P1 P2 P3 P4 P5 P6

06:30

21˚C 10˚C 10˚C 10˚C 21˚C 10˚C

08:00

08:00

12:00

12:00

7D

24H

14:00

14:00

17:30

17:30

22:00

22:00

Press the ‘PROG’ button once.

Programming for Monday to Friday is now selected.

Press the or buttons to adjust the P1 time. Press the ‘OK’ button.

Press the or buttons to adjust the P1 temp. Press the ‘OK’ button.

Repeat this process to adjust P2 to P6 times and temperatures.

Press the ‘OK’ button.

EPH Controls UK

[e-mail] www.ephcontrols.co.uk

20190930_CP4M_OpIns_JW

CP4M Room Thermostat

Hardwired Open Therm®

Boiler Plus

Page 2 of 4

Operating Instructions

5. Adjusting the program settings for 5/2d

Programming for Saturday to Sunday is now selected.

Press the or buttons to adjust the P1 time. Press the ‘OK’ button.

Press the or buttons to adjust the P1 temp. Press the ‘OK’ button.

Repeat this process to adjust P2 to P6 times and temperatures.

Press the ‘AUTO’ button to return to automatic mode.

While in PROG Mode pressing the ‘PROG’ button will jump from P1-P2 etc
without changing the temperature.

While in PROG Mode pressing the ‘TIME’ button will jump to the next day
(block of days).

If 7 D mode is selected, you can program each day of the week with 6
individual times and temperatures.

If 24H mode is selected, you can only program each day of the week with
the same 6 times and temperatures.

(Continued)

6. Copy function

Copy function may only be used if the thermostat is in the 7d mode.

Set the times and temperatures for the day that you wish to copy from in
PROG Mode.

When still on the day press the ‘COPY’ button.

The day of the week that you have selected will be shown with ‘COPY’
below it.

The next day will begin to ash on the top of the screen.

Press the button to copy the times and temperatures to that day.

Press the button to skip a day.

You can copy to multiple days using the button.

Press the ‘OK’ button when copying has been completed.

7. Temporary override

9. Boost function

The thermostat can be boosted to a specic temperature for 1, 2 or 3 hours
while the thermostat is operating in all modes except for holiday mode.

Press the ‘BOOST’ button 1, 2 or 3 times, the time that the boost will be
activated to will ash on the screen.

If you do not press any other button the boost will activate to the
temperature displayed on the screen after 5 seconds.

If you press the ‘OK’ button the temperature will now ash. You can edit the
temperature if you press the or buttons.

Press the ‘OK’ button or wait for 5 seconds to enter BOOST Mode.

‘BOOST TO’ will now be displayed on the screen with the time that it is
activated to displayed above this text.

Press the ‘BOOST’ button again to deactivate the boost.

10. Holiday function

This will switch your heating system o between the start and end times
you select .

Press the ‘HOL’ button, ‘HOLIDAY FROM’ will appear on screen.

Press the or buttons to adjust the year. Press the ‘OK’ button.

Press the or buttons to adjust the month. Press the ‘OK’ button.

Press the or buttons to adjust the day. Press the ‘OK’ button.

Press the or buttons to adjust the hour. Press the ‘OK’ button.

‘HOLIDAY TO’ will appear on screen.

Press the or buttons to adjust the year. Press the ‘OK’ button.

Press the or buttons to adjust the month. Press the ‘OK’ button.

Press the or buttons to adjust the day. Press the ‘OK’ button.

Press the or buttons to adjust the hour. Press the ‘OK’ button.

The thermostat will now return to the mode it was in before the Holiday
settings were entered.

To cancel Holiday mode, press the ‘HOL’ button.

When in AUTO mode, press the or buttons to adjust the
temperature setpoint.

‘OvEr’ will appear on the screen.

Press ‘OK’ or after 5 seconds the thermostat will operate in this temporary
override, util the next switching time.

To cancel temporary override, press the ‘OFF’ buttton and then press the
‘AUTO’ button to return to the automatic mode.

8. Permanent override

Press the ‘MAN’ button to enter Manual Mode (Permanent Override).

‘MAN’ will appear on the screen.

Press the or buttons to adjust the temperature setpoint.

Press ‘OK’ to conrm the temperature selection or after 5 seconds the
thermostat will operate in this permanent override.

The thermostat will operate in MAN mode until the mode is changed.

To cancel permanent override, press the ‘OFF’ button and then press the

‘AUTO’ button to return to automatic mode.

11. Keypad lock and unlock

To lock the keypad, press and hold the and buttons for 10 seconds.

will appear on the screen. The keypad is now locked.

To unlock the keypad, press and hold the and buttons for 10 seconds.

will disappear from the screen. The keypad is now unlocked.

12. Backlight mode selection

There are two settings for selection. The factory default setting is AUTO.

OFF The backlight is permanently OFF.

AUTO On pressing any button the backlight stays on for 5 seconds.

ON The backlight is permanently ON.

To adjust the backlight setting, lower the cover on the front of the unit.

Press the ‘OK’ button for 5 seconds.

Press either the or buttons to select the OFF, AUTO or ON mode.

Press the‘OK’ button.

13. Frost protection

Frost protection is built into this thermostat.

It is pre xed at 5°C and is not adjustable.

It will only be activated when the thermostat is in the OFF mode and the
room temperature falls below 5°C.

OFF

AUTO

5°C

EPH Controls Ireland

[e-mail] www.ephcontrols.com

EPH Controls UK

[e-mail] www.ephcontrols.co.uk

20190930_CP4M_OpIns_JW