EPH CDT2 User manual

CAUTION!
Before commencing any work on the electrical
connections, you must rst 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 qualied electricians or authorised
service sta 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 2
CDT2 Room Thermostat Hardwired
4. Installation
1. Factory default settings
8. Resetting the thermostat
7. Button / Symbol description
6. Frost protection
2. Specications & wiring
Contacts: Volt Free
Temperature indicator: °C
Switching dierential: 0.4°C
In built frost protection: 5°C
High and Low temp. limitation: O
Blue backlight activated : for 10 secs after any button is pressed
Keypad lock: O 5°C
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. Specication & wiring
3. Mounting
4. Installation
5. Wiring diagram
6. Frost protection
7. Button / symbol description
8. Resetting the thermostat
9. Adjusting the setpoint temperature
10. Keypad lock and unlock
11. High and Low temperature limitation
12. Adjusting the switching dierential
Prior to setting the thermostat, it is neccessary to
complete all required settings described in this section.
5. Wiring diagram
9. Adjusting the setpoint temperature
Press the or buttons to adjust the temperature setpoint.
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: 8A 230Vac
Dimensions: 84 x 84 x 30mm
Temperature sensor: NTC 10K Ohm @ 25°C
Switching dierential: 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 oor 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 tted 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 321LN
MAINS
SUPPLY
ON OFFCOM
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 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
EPH Controls Ireland
[e-mail] www.ephcontrols.com
EPH Controls UK
[e-mail] www.ephcontrols.co.uk
20180116__CDT2-Hardwired_OpIns_JW

Operating Instructions
Page 2 of 2
CDT2 Room Thermostat Hardwired
10. Keypad lock and unlock OFF
11. High and Low temperature limitation OFF
0.4˚C
12. Adjusting the switching dierential
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.
Press the button to return to normal operation.
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.
Set
An upper and lower temperature limit may be chosen.
Press and hold the and buttons for 10 seconds.
“Limit OFF”will appear on the screen.
Press the button to select“Limit ON” mode.
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 button to select the low limit temperature mode.
Press the and buttons to select the low limit temperature.
Press the button and the thermostat is ready for operation.
“Limit” will appear on the screen.
To deactivate High and Low temperature limitation.
Press and hold the and buttons for 10 seconds.
“Limit ON”will appear on the screen.
Press the button to deactivate this function.
“Limit OFF”will appear on the screen.
Press the button and the thermostat is ready for operation.
Set
Set
Set
EPH Controls Ireland
[e-mail] www.ephcontrols.com
EPH Controls UK
[e-mail] www.ephcontrols.co.uk
20180116__CDT2-Hardwired_OpIns_JW