EPH CRT2 Operating Instructions

CRT2 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
13. Changing the thermostat mode
14. Normal control mode (On / O )
15. Delay start control mode
16. Replacing the batteries
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
2. Speci cations & wiring
Power supply:
Power consumption:
Battery replacement:
Temp. control range:
Ambient temperature:
Contact rating:
Dimensions:
Temperature sensor:
Temperature indication:
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.
EPH Controls Ireland
technical@ephcontrols.com www.ephcontrols.com
Volt Free
°C
0.4°C
5°C
2xAA Alkaline Battery
2mW
Once per year
5 ... 35°C
0 ... 50°C
8A 250Vac
84 x 84 x 30mm
NTC 10K Ohm @ 25°C
˚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.
Battery Operated
5. Wiring diagram
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 programming.
Press and hold the
dEL will appear on the screen.
Press the
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
technical@ephcontrols.com www.ephcontrols.co.uk
Page 1 of 2
Operating Instructions
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.)
Important: Keep this document
INTERNAL WIRING DIAGRAM CRT2
3 2 1
ON COM
5°C
Set
button for 5 seconds.
button on the side of the thermostat.
OFF
and
and
Heating ON symbol
Reset button
Set point increase
Set point decrease
buttons for 10 seconds.
buttons for 10 seconds.
20221013_CRT2_OpIns_PK