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 2
CRT2 Room Thermostat
Battery Operated
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
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. Replacing the batteries
Prior to setting the thermostat, it is neccessary to
complete all required settings described in this section.
5. Wiring diagram
Important: Keep this document
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.
20170301_A
W1077_CR
T2_OpI
ns_JW
EPH Controls Ireland
Sitecast Industrial Estate, Pouladuff,
Cork, T12 W665, Ireland
[email protected] www.ephcontrols.com
EPH Controls UK
Unit E4, Welland Business Park, Valley Way, Market Harborough,
Leicestershire, LE16 7PS, United Kingdom
[email protected] www.ephcontrols.co.uk
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.
INTERNAL WIRING DIAGRAM CRT2
3 2 1
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 programming.
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.
Power supply:
2xAA Alkaline Battery
Power consumption:
2mW
Battery replacement:
Once per year
Temp. control range:
5 ... 35°C
Ambient temperature:
0 ... 50°C
Contact rating:
8A 250Vac
Dimensions:
84 x 84 x 30mm
Temperature sensor:
NTC 10K Ohm @ 25°C
Temperature indication:
˚C
Switching differential:
Adjustable from 0.2/0.4/0.6/0.8/1.0˚C
Frost protection:
Only operational in stand by mode
