EPH Controls CDT2-24 Operating Instructions
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CDT2-24 Room Thermostat
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.
Keypad lock and unlock
10. High and Low temperature limitation
11. Adjusting the switching di erential
12. Adjusting the setpoint temperature
Prior to setting the thermostat, it is neccessary to
complete all required settings described in this section.
1. Factory default settings
Contacts:
Temperature indicator:
Switching di erential:
In built frost protection:
High and Low temp. limitation: O
Blue backlight activated :
Keypad lock:
2. Speci cations & wiring
Power supply:
Power consumption:
Temp. control range:
Ambient temperature:
Contact rating:
Dimensions:
Temperature sensor:
Switching di erential:
Frost protection:
3. Mounting
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:
4. Installation
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.
Volt Free
°C
0.4°C
5°C
for 10 secs after any button is pressed
O
24Vac 50Hz
8 VA
5 ... 35°C
0 ... 50°C
7A 24Vac
84 x 84 x 30mm
NTC 10K Ohm @ 25°C
Adjustable from 0.2/0.4/0.6/0.8/1.0˚C
Only operational in stand by mode
1. Recessed conduit boxes
2. Surface mounting boxes
3. Directly on walls.
EPH Controls Ireland
Sitecast Industrial Estate, Pouladu ,
Cork, T12 W665, Ireland
[email protected] www.ephcontrols.com
Page 1 of 2
Operating Instructions
Hardwired
5. Wiring diagram
INTERNAL WIRING DIAGRAM CDT2-24
If 24Vac output is required, terminals L & 2 must be electrically linked.
6. 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 stand by mode and
the room temperature reaches 5°C.
7. Button / Symbol description
Room temperature
On / Standby button
Set button
8. Resetting the thermostat
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.
Press the
button on the side of the thermostat.
RESET
9. Keypad lock and unlock
To lock the keypad, press and hold the
will appear on the screen. The keypad is now locked.
To unlock the keypad, press and hold the
will disappear from the screen. The keypad is now unlocked.
EPH Controls UK
Unit E4, Welland Business Park, Valley Way, Market Harborough,
Leicestershire, LE16 7PS, United Kingdom
[email protected] www.ephcontrols.co.uk
CAUTION!
Before commencing any work on the electrical
connections, you must rst 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 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.)
Important: Keep this document
3 2 1 L N
ON
COM
OFF
24Vac
SUPPLY
5°C
Heating ON symbol
Reset button
Set point increase
Set point decrease
OFF
and
buttons for 5 seconds.
and
buttons for 5 seconds.