CAUTION!
Before commencing any work on the electrical
connections, you must first disconnect the thermostat
from the mains. None of the 230V 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.
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.)
Operating Instructions
Page 1 of 3
CDT2 Room Thermostat
with Delay Start
20221103_CDT2-230-DS-TPI_Opsins_PK
EPH Controls Ireland
[email protected] www.ephcontrols.com
EPH Controls UK
[email protected] www.ephcontrols.co.uk
4. Installation
1. Factory default settings
8. Resetting the thermostat
7. Button / Symbol description
6. Frost protection
9. Keypad lock and unlock
2. Specifications & wiring
Contacts:
Volt
Free
Temperature indicator:
°C
Switching differential:
0.4°C
In built frost protection:
5°C
High and Low temp. limitation: Off
Blue backlight activated :
for 10 secs after any button is pressed
Keypad lock:
Off
5°C
OFF
Reset button
Set point increase
Set point decrease
Set button
On / Standby button
Room temperature
Heating ON symbol
3. Mounting
Contents
1. Factory default settings
2. Specification & wiring
3. Mounting
4. Installation
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)
Prior to setting the thermostat, it is neccessary to complete all required settings described in this section.
5. Wiring diagram
Important: Keep this document
Power supply:
230Vac 50Hz
Power consumption:
8 VA
Temp. control range:
5 ... 35°C
Ambient temperature:
0 ... 50°C
Contact rating:
7A 230Vac
Dimensions:
84 x 84 x 30mm
Temperature sensor:
NTC 10K Ohm @ 25°C
Switching differential:
Adjustable from 0.2/0.4/0.6/0.8/1.0˚C
Frost protection:
Only operational in stand by 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.
Mount the unit as described in section 3.
Wire the thermostat according to the wiring diagram.
Close the thermostat and tighten the fastening screw.
The mounting height should be 1.5 meters above the floor level.
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.
The unit can be fitted to:
1. Recessed conduit boxes
2. Surface mounting boxes
3. Directly on walls.
If mains voltage output is required, terminals L & 2 must be electrically linked.
INTERNAL WIRING DIAGRAM CDT2
3 2 1 L N
MAINS
SUPPLY
ON
OFF
COM
Frost protection is built into this thermostat, it is pre fixed at 5°C and is not
adjustable.
It will only be activated when the thermostat is in the stand by mode and
the room temperature reaches 5°C.
It is necessary to reset the thermostat prior to initial use.
Press and hold the button for 5 seconds.
dEL will appear on the screen.
Press the button on the side of the thermostat.
RESET
Set
To lock the keypad, press and hold the and buttons for 5 seconds.
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.
