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EPH CONTROLS CDT2-24 Room Thermostat Instruction Manual

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Operating Instructions

CDT2-24 Room Thermostat with Delay Start

Contents

1. Factory default settings

2. Speciﬁcation & wiring

3. Mounting

4. Installation

CAUTION!

Before commencing any work on the electrical

connections, you must ﬁrst disconnect the thermostat

from the mains. None of the 24V connections must be live

until the installation has been completed and the housing

is closed. Only qualiﬁed electricians or authorised service

staﬀ are permitted to open the thermostat.

5. Wiring diagram

6. Frost protection

7. Button / symbol description

8. Resetting the thermostat

9. Keypad lock and unlock

10. High and Low temperature limitation

11. Adjusting the switching diﬀerential

12. Adjusting the setpoint temperature

13. Changing the thermostat mode

14. Normal control mode (On / Oﬀ)

15. Delay start control mode

16. Time Proportional Integral Mode (TPI)

There are parts that may carry mains voltage behind the

cover. The thermostat must not be left unsupervised

when open. (Prevent non specialists and especially

children from gaining access to it.)

Important: Keep this document

Prior to setting the thermostat, it is neccessary to

complete all required settings described in this section.

5. Wiring diagram

1. Factory default settings

Contacts:

Volt Free

Temperature indicator:

Switching diﬀerential:

In built frost protection:

High and Low temp. limitation: Oﬀ

Blue backlight activated :

Keypad lock:

°C

0.4°C

5°C

INTERNAL WIRING DIAGRAM CDT2-24

3 2 1 L N

ON COM OFF

24Vac

SUPPLY

for 10 secs after any button is pressed

Oﬀ

If 24Vac output is required, terminals L & 2 must be electrically linked.

2. Speciﬁcations & wiring

5°C

6. Frost protection

Power supply:

24Vac 50Hz

8 VA

5 ... 35°C

0 ... 50°C

Frost protection is built into this thermostat, it is pre ﬁxed at 5°C and is not

adjustable.

Power consumption:

Temp. control range:

Ambient temperature:

Contact rating:

It will only be activated when the thermostat is in the stand by mode and

the room temperature reaches 5°C.

7A 24Vac

Dimensions:

84 x 84 x 30mm

Temperature sensor:

Switching diﬀerential:

Frost protection:

NTC 10K Ohm @ 25°C

Adjustable from 0.2/0.4/0.6/0.8/1.0˚C

Only operational in stand by mode

7. Button / Symbol description

Heating ON symbol

Room temperature

3. Mounting

The mounting height should be 1.5 meters above the ﬂoor level.

Reset button

Set point increase

Set point decrease

On / Standby button

Set button

The thermostat should be wall mounted in the room where the heating is to

be controlled.

The place of installation should be chosen so that the sensor can measure the

room temperature as accurately as possible.

Choose the mounting location to prevent direct exposure to sunlight or other

heating / cooling sources when mounted.

8. Resetting the thermostat

The unit can be ﬁtted to:

1. Recessed conduit boxes

2. Surface mounting boxes

3. Directly on walls.

It is necessary to reset the thermostat prior to initial use.

Set

Press and hold the

button for 5 seconds.

dEL will appear on the screen.

RESET

Press the

button on the side of the thermostat.

4. Installation

OFF

and

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

head screwdriver.

9. Keypad lock and unlock

To lock the keypad, press and hold the

buttons for 5 seconds.

The thermostat is hinged and can be opened 180 degrees.

Mount the unit as described in section 3.

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

To unlock the keypad, press and hold the and buttons for 5 seconds.

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

Wire the thermostat according to the wiring diagram.

Close the thermostat and tighten the fastening screw.

EPH Controls Ireland

EPH Controls UK

technical@ephcontrols.com www.ephcontrols.com

technical@ephcontrols.com www.ephcontrols.co.uk

20221006_CDT2-24-DS_Opins_PK

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General	Details
Name	EPH CONTROLS CDT2-24 Room Thermostat Instruction Manual
Make	EPH CONTROLS
Language	English
Filetype	PDF (Download)
File size	0.19 MB

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EPH Controls CDT2-24 Instruction Manual: Specifications

Power supply	24Vac 50Hz
Maximum load	7A 24Vac
Sensor	NTC 10K Ohm @ 25°C
Operating temperature	0 ... 50°C
Dimensions	84 x 84 x 30mm
Power consumption	8 VA

Full specifications, page 1

EPH Controls CDT2-24 compared with other EPH Controls thermostats

Specification	EPH Controls CDT2-24	EPH Controls CDTP2 Hardwired	EPH Controls CRTP2	EPH Controls CP4B
Power supply	24Vac 50Hz	230Vac 50Hz	2 x AA Alkaline Battery	2 x AA Alkaline Batteries
Maximum load	7A 24Vac	8A 230Vac	8A 230Vac	8A 230Vac
Sensor	NTC 10K Ohm @ 25°C	NTC 10K Ohm @ 25°C	NTC 10K Ohm @ 25°C	NTC 100K Ohm @ 25˚C
Operating temperature	0 ... 50°C	0 ... 50°C	0 ... 50°C	0 … 45˚C
Dimensions	84 x 84 x 30mm	84 x 84 x 30mm	84 x 84 x 30mm	130 x 99 x 25mm