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Table of Contents
Related Manuals for EPH HDT
Summary of Contents for EPH HDT
- Page 1 Room Thermostat Installation and Operation Guide...
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Page 2: Table Of Contents
Table of contents Factory default settings Specifications LCD Display Buttons Wiring Mounting & installation On / Off Function & Adjusting the target temperature Locking the Keypad / Backlight Menu Function PO 1 Operating Mode Nor (Normal Mode) Delay Start Control (On/Off ) Time Proportional Integral Mode (TPI) - Page 3 PO 2 Setting High and Low limits PO 3 Hysteresis HOn and HOff PO 4 Calibration PO 5 Frost Protection PO 6 Setback Mode PO 7 Resetting the Thermostat...
- Page 4 Mains operated non-programmable Room Thermostat Installation Instructions...
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Page 5: Factory Default Settings
Factory default settings Contacts: Volt Free High and Low Temp. limitation: Keypad lock: Backlight: Auto Setback: 0.0˚C (off ) Operating mode: Normal EPH Controls Ltd. -
Page 6: Specifications
Specifications Power supply / Input: 230Vac 50-60Hz Power consumption: Operating ≤ 1.5W Temperature range: 5 … 35˚C Ambient temperature: 0 … 45˚C Ambient admissible humidity: 5-95%RH Contact rating: 7A 230Vac Dimensions: 85 x 85 x 36mm Temperature sensor: NTC 100K Backlight: White IP rating:... -
Page 7: Lcd Display
If the keypad is locked, the lock symbol is displayed. When the thermostat is calling for heat, the flame symbol is displayed. When a high or low temperature limit is set, ‘LIM’ is displayed. Displayed when setback is enabled. Displayed when delay start is enabled. EPH Controls Ltd. -
Page 8: Buttons
Buttons Reset Handwheel Button Standby Button... -
Page 9: Wiring
Thermostat works in Setback mode * If mains output is required terminals L and 2 must be electrically linked. Terminal Connections Live In Neutral In Terminal 1 Setback Terminal 2 COM - Common connection Terminal 3 - N/O Normally open connection EPH Controls Ltd. -
Page 10: Mounting & Installation
Mounting & Installation Caution! Installation and connection should only be carried out by a qualified person. ƒ Only qualified electricians or authorised service staff are permitted to open the ƒ thermostat. If the thermostat is used in a way not specified by the manufacturer, its safety may be ƒ... - Page 11 Screw the backplate onto a back box or directly to the surface. Wire the thermostat according to the wiring diagram on page 7. Close the front housing and tighten the screw on the bottom of the thermostat. EPH Controls Ltd.
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- Page 13 Mains operated non-programmable Room Thermostat Operating Instructions...
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Page 14: On / Off Function & Adjusting The Target Temperature
On / Off Function Press to turn the thermostat On or Off. When in the ON mode the thermostat will display the current ambient temperature. When in the OFF mode the thermostat will display the current ambient temperature and the word ‘OFF’ . Adjusting the target temperature Rotate clockwise to increase the target temperature. -
Page 15: Locking The Keypad / Backlight
The backlight is permanently off. To adjust the backlight setting, press for 10 seconds. ‘AUt’ appears on the screen. Rotate to change the mode between AUTO, ON and OFF. Press to confirm selection and to return to normal operation. EPH Controls Ltd. -
Page 16: Menu Function
Menu Function This menu allows the user to adjust additional functions. PO 1 Operating Mode (Normal / Delay Start / TPI) There are three settings for selection, Normal, Delay Start or TPI mode. The default setting is Normal. Press and hold the together for 5 seconds, ‘P01 &... -
Page 17: Po 1 Operating Mode
When the temperature rises above the target temperature, will disappear, and the thermostat will cancel the demand for heat. Graph (15.1): On / O Control Temp 22˚C Target Temperature 21˚C 20˚C 19˚C 18˚C 17˚C Time Minutes EPH Controls Ltd. -
Page 18: Delay Start Control (On/Off)
PO 1 Operating Mode (Normal / Delay Start / TPI) Delay Start Control (On/Off) When the delay start mode is active, ‘dS’ will appear continuously on the screen. When in this mode the thermostat is delayed by a variable time depending on the current temperature, target temperature and also the fall in temperature from when the delay start has activated. - Page 19 If the difference between the actual temperature and the target is 3°C the thermostat will delay starting for circa 24 minutes. If the difference 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 20: Time Proportional Integral Mode (Tpi)
PO 1 Operating Mode (Normal / Delay Start / TPI) Time Proportional Integral Mode (TPI) When the thermostat is in TPI mode and the temperature is rising in the zone and falls into the Proportional Bandwidth section, TPI will start to affect the thermostats operation. - Page 21 TPI control. You can set this temperature from 1.5°C to 3.0°C in 0.1°C increments. Graph (19.1): TPI Control Temp 22˚C 21˚C Target Temperature 20˚C Proportional Bandwidth 19˚C 18˚C 17˚C Time Minutes Heating On Heating O EPH Controls Ltd.
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Page 22: Po 2 Setting High And Low Limits
PO 2 Setting High and Low limits Hi 35°C Lo 5°C This menu allows the installer to change the minimum and maximum temperatures that the thermostat can be set at. To access this setting press and hold together for 5 seconds. ‘P01 &... -
Page 23: Po 3 Hysteresis Hon And Hoff
‘HOff’ appears on the screen and the temperature will begin to flash. to select the ‘HOff’ temperature, press to confirm. Press to confirm. The settings will be saved and the user will be returned to the previous screen. EPH Controls Ltd. -
Page 24: Po 4 Calibration
P04 – Calibration This menu allows the installer to calibrate the temperature of the thermostat. To access this setting press and hold together for 5 seconds. ‘P01 & Nor’ will appear on the screen. Rotate clockwise until ‘P04 & CAL’ appears on the screen. Press to select. -
Page 25: Po 5 Frost Protection
‘P05 & Fr’ appears on the screen. Rotate Press to confirm. Rotate to switch between ‘On’ and ‘OFF’ . Press to confirm selection. The setting will be saved and the user will be returned to the previous screen. EPH Controls Ltd. -
Page 26: Po 6 Setback Mode
P06 – Setback Mode (0.0°C / Off) * To use the thermostat in Setback mode, please refer to page 7 of this guide. * Setback functionality can only be used in conjunction with a Programmer / Timeswitch. When the thermostat is operating in Setback mode, it will operate to a reduced temperature based on the input set by the installer in this menu. -
Page 27: Po 7 Resetting The Thermostat
‘rst’ will appear on the screen and ‘nO’ will flash. Rotate clockwise. ‘rst’ will remain and ‘YES’ will flash on the screen. Press to confirm. The thermostat will restart and revert to its factory defined settings. EPH Controls Ltd. - Page 28 EPH Controls IE technical@ephcontrols.com www.ephcontrols.com T +353 21 434 6238 F +353 21 454 5890 EPH Controls UK technical@ephcontrols.com www.ephcontrols.co.uk T +44 1933 626 396 F +44 1933 626 218...
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