EPH Controls CDT2-24 Manuals

CAUTION! Before commencing any work on the electrical connections, you must frst 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 qualifed electricians or authorised service staf 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 CDT2-24 Room Thermostat Hardwired 4. Installation 1. Factory default settings 8. Resetting the thermostat 7. Button / Symbol description 6. Frost protection 9. Keypad lock and unlock 2. Specifcations & wiring Contacts: Volt Free Temperature indicator: °C Switching diferential: 0.4°C In built frost protection: 5°C High and Low temp. limitation: Of Blue backlight activated : for 10 secs after any button is pressed Keypad lock: Of 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. Specifcation & 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 diferential 12. Adjusting the setpoint temperature 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: 24Vac 50Hz Power consumption: 8 VA Temp. control range: 5 ... 35°C Ambient temperature: 0 ... 50°C Contact rating: 7A 24Vac Dimensions: 84 x 84 x 30mm Temperature sensor: NTC 10K Ohm @ 25°C Switching diferential: 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. 20170308_AW1077_CDT2-24_OpIns_JW EPH Controls Ireland Sitecast Industrial Estate, Pouladuf, 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 foor 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 ftted to: 1. Recessed conduit boxes 2. Surface mounting boxes 3. Directly on walls. If 24Vac output is required, terminals L & 2 must be electrically linked. INTERNAL WIRING DIAGRAM CDT2-24 3 2 1 L N 24Vac SUPPLY ON OFF COM Frost protection is built into this thermostat, it is pre fxed 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.