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EPH Controls HRT Installation And Operation Manual
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EPH Controls HRT Installation And Operation Manual

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HRT
Room Thermostat
Installation and Operation Guide

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Summary of Contents for EPH Controls HRT

  • Page 1 Room Thermostat Installation and Operation Guide...

  • Page 2: Table Of Contents

    Table of contents Installation Instructions Factory default settings Wiring Speci cations Mounting & installation LCD Display Replacing the batteries Buttons Operating Instructions On / O Function & Adjusting the target temperature Locking the Keypad / Backlight Menu Function PO 1 Operating Mode Nor (Normal Mode) Delay Start Control (On/O ) Time Proportional Integral Mode (TPI)

  • Page 3: Installation Instructions

    Battery operated non-programmable Room Thermostat Installation Instructions...

  • Page 4: Factory Default Settings

    Factory default settings Contacts: Volt Free High and Low Temp. limitation: Keypad lock: Backlight: Auto Setback: 0.0˚C (o ) Operating mode: Normal...

  • Page 5: Speci Cations

    Ambient admissible humidity: 5-95%RH Contact rating: 8A 230Vac Dimensions: 85 x 85 x 36mm Temperature sensor: NTC 100K Backlight: White IP rating: IP20 Pollution degree: Switching di erential: Adjustable from 0.0 – 1.0°C 0.1°C increments Automatic action: EPH Controls Ltd.

  • Page 6: Lcd Display

    LCD Display Shows the current / target temperature. Displayed when batteries need to be replaced. If the keypad is locked, the lock symbol is displayed. When the thermostat is calling for heat, the ame symbol is displayed. When a high or low temperature limit is set, ‘LIM’ is displayed. Displayed when setback is enabled.

  • Page 7: Buttons

    Buttons Reset Handwheel Button Standby Button EPH Controls Ltd.

  • Page 8: Wiring

    Wiring 230V on Terminal 1: Thermostat works in Normal mode 0V on Terminal 1: Thermostat works in Setback mode Terminal Connections Terminal 1 Setback Terminal 2 Common Terminal 3...

  • Page 9: Mounting & Installation

    Before commencing installation, the thermostat must be rst disconnected from the ƒ mains. This thermostat can be mounted in the following ways: 1) Directly mounted on wall 2) To a recessed conduit box EPH Controls Ltd.
  • Page 10 Mounting & Installation Continued Remove the thermostat from its packaging. Choose a mounting location so that the thermostat can measure the room temperature as accurately as possible. - Mount the thermostat 1.5 metres above the oor level. - Prevent direct exposure to sunlight or other heating / cooling sources.
  • Page 11 45 113 EPH Controls Ltd.

  • Page 12: Replacing The Batteries

    Replacing the batteries is displayed when the batteries need to be replaced. Push in the battery compartment to release it. Replace the batteries with 2 x AA Alkaline batteries. Re-insert the battery compartment. Push it until it clicks into place.
  • Page 13 Battery operated non-programmable Room Thermostat Operating Instructions...
  • Page 14 On / O Function Press to turn the thermostat On or O . 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 The backlight is permanently o . To adjust the backlight setting, press for 10 seconds. ‘bL AUtO’ appears on the screen. Rotate to change the mode between AUTO, ON and OFF. Press to con rm selection and to return to normal operation. EPH Controls Ltd.
  • Page 16 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 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 PO 1 Operating Mode (Normal / Delay Start / TPI) Delay Start Control (On/O ) 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 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.
  • Page 20 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 Bandwith section, TPI will start to a ect 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.
  • Page 22 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 ‘HO ’ appears on the screen and the temperature will begin to ash. to select the ‘HO ’ temperature, press to con rm. Press to con rm. The settings will be saved and the user will be returned to the previous screen. EPH Controls Ltd.
  • Page 24 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 & CALI’ appears on the screen. Press to select.
  • Page 25 Setback temperature will ash on the screen. Rotate to set the Setback temperature. Press to con rm. The setback temperature will be saved and the user will be returned to the previous screen. When in Setback mode ‘SB’ will appear on the screen. EPH Controls Ltd.
  • Page 26 P06 – Frost Protection Frost protection is built into this thermostat, it is pre xed to 5°C and is not adjustable. It will only be activated when the thermostat is in the standby mode and the temperature drops below 5°C. To access this setting, press and hold together for 5 seconds.
  • Page 27 ‘rst’ will appear on the screen and ‘nO’ will ash. Rotate clockwise. ‘rst’ will remain and ‘YES’ will ash on the screen. Press to con rm. The thermostat will restart and revert to its factory de ned settings. EPH Controls Ltd.
  • Page 28 EPH Controls IE sales@ephcontrols.com www.ephcontrols.com T +353 21 434 6238 F +353 21 454 5890 EPH Controls UK sales@ephcontrols.co.uk www.ephcontrols.co.uk T +44 1933 626 396 F +44 1933 626 218...