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Summary of Contents for EPH Controls CDT2
- Page 1 CDT2 Room Thermostat Installation and Operation Guide...
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Page 2: Table Of Contents
Table of contents Installation Instructions Factory Default Settings Speci cations LCD Display Buttons Wiring Mounting & installation Operating Instructions On / O Function & Adjusting the Target Temperature Locking the Keypad / Backlight HYS Hysteresis HOn and HOFF Menu Calibrate Setting High and Low limits Operating Mode Normal Mode (Nor) -
Page 3: Installation Instructions
Mains operated non-programmable Room Thermostat Installation Instructions... -
Page 4: Factory Default Settings
Normal Temperature indicator: ˚C Frost protection: On (5˚C) HYS On: 0.4˚C HYS OFF: 0.0˚C Note: Frost protection is built into this thermostat. It will only be activated when the thermostat is in OFF position and the temperature reaches 5˚C. CDT2... -
Page 5: Speci Cations
7(3)A 230VAC Switch output: SPDT Volt Free Dimensions: 91 x 91 x 26mm Internal temperature sensor: NTC 100K Backlight: White IP rating: IP20 Pollution degree: Hysteresis Adjustable from 0 to 1°C (Switching di erential) 0.1°C increments Automatic action: EPH Controls Ltd. -
Page 6: Lcd Display
Displays when thermostat is in the OFF mode. Displays when setting HIGH and LOW temperature limit. [10] Displays during calibration mode. [11] Displays when setting hysteresis. set room temp mode cyc p band HYS calibrate high low limit off [12] [11] [10] CDT2... -
Page 7: Buttons
Buttons Reset Button OK Button Standby Button Down Button Up Button EPH Controls Ltd. -
Page 8: Wiring
Wiring Terminal Connections Neutral In Live In Terminal 1 OFF - N/C Normally closed connection Terminal 2 COM- Common connection Terminal 3 ON - N/O Normally open connection CDT2... -
Page 9: Mounting & Installation
Before commencing installation, the thermostat must be rst disconnected ƒ from the mains. This thermostat can be mounted in the following ways: 1) Directly mounted on wall 2) To a recessed conduit box 3) To a surface mounting box EPH Controls Ltd. - Page 10 Wire the thermostat according to the wiring diagram on page 6. Screw the backplate onto a back box or directly to the surface. Close the front housing and tighten the screw on the bottom of the thermostat. CDT2...
- Page 11 45 113...
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Page 12: Operating Instructions
Mains operated non-programmable Room Thermostat Operating Instructions... - Page 13 5-35˚C. Press or wait 5 seconds. The target temperature is now saved. Press to decrease the target temperature from 5-35˚C. Press or wait 5 seconds. The target temperature is now saved. EPH Controls Ltd.
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Page 14: Locking The Keypad / Backlight
The backlight is permanently on. To adjust the backlight setting, press and hold for 10 seconds. ‘AUt’ appears on the screen. to change the mode between AUTO, ON and OFF. Press to con rm selection and to return to normal operation. CDT2... -
Page 15: Menu
Use to select the ‘HOn’ temperature, press ‘HOFF’ appears on the screen. Press and the temperature will begin to ash. Use to select the ‘HOFF’ temperature, press . Press to return to normal operation. EPH Controls Ltd. -
Page 16: Calibrate
5 seconds. ‘HYS’ will appear on the screen. Press until ‘CALIBRATE’ ashes on the screen. Press to select. The actual temperature will ash on the screen. Press to calibrate the temperature. Press to con rm the temperature. Press to return to normal operation. CDT2... - Page 17 ‘LOW LIMIT’ will appear on the screen, the temperature will begin to ash. to select the low limit for the thermostat. Press to con rm. Press to return to normal operation. ‘LIMIT’ will appear on the screen. EPH Controls Ltd.
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Page 18: Operating Mode
5 seconds. ‘HYS’ will appear on the screen. Press until ‘MODE’ appears on the screen. Press to select. to select between: nOr (Normal mode) dS (delay start mode) tPi (Time proportional integral mode) Press to con rm the mode. CDT2... - Page 19 When the temperature rises above the target temperature, will disappear, and the thermostat will cancel the demand for heat. Graph (17.1): On / O Control Temp 22˚C Target Temperature 21˚C 20˚C 19˚C 18˚C 17˚C Time Minutes EPH Controls Ltd.
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Page 20: Delay Start Control (On/O )
E.g: If the temperature is 6˚C below the thermostat target, the thermostat will call for heat immediately. If the temperature is 2˚C below the target, the thermostat will not call for heat for 32 minutes. Temperature below thermostat setting °C CDT2... - Page 21 3°C the thermostat will delay starting for circa 24 minutes. If the di erence is 6°C or more then the thermostat will be switched on immediately. The time delay will change if the temperature drops from the original calculation. EPH Controls Ltd.
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Page 22: Time Proportional Integral Mode (Tpi)
2. The Proportional Bandwith CyC – Number of Heating Cycles per hour 6 Cycles This value will decide how often the thermostat will cycle the heating on and o when trying to achieve the target temperature. You can select 2/3/6 or 12. CDT2... - Page 23 TPI control. You can set this temperature from 1.5°C to 3.0°C in 0.1°C increments. Graph (21.1): TPI Control Temp 22˚C Target Temperature 21˚C 20˚C Proportional Bandwidth 19˚C 18˚C 17˚C Time Minutes Heating On Heating O EPH Controls Ltd.
- Page 24 Once TPI mode is selected, ‘CYC’ and ‘06’ will appear on the screen. to select from 2,3,6 or 12. Press to con rm. ‘P Band’ and ‘2.0’ will appear on the screen. to select from 1.5 to 3.0. Press to con rm. Press to return to normal operation. CDT2...
- Page 25 Press the reset button and release it. ‘NO’ will ash on the screen. Press ‘YES’ will ash on the screen. Press to con rm. The thermostat will restart and revert to its factory settings. EPH Controls Ltd.
- Page 26 Notes...
- Page 27 Notes...
- Page 28 EPH Controls IE technical@ephcontrols.com www.ephcontrols.com/contact-us +353 21 471 8440 Cork, T12 W665 EPH Controls UK technical@ephcontrols.co.uk www.ephcontrols.co.uk/contact-us +44 1933 322 072 Harrow, HA1 1BD...
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