EPH Controls RDT Installation And Operation Manual
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EPH Controls RDT Installation And Operation Manual

Recessed room thermostat
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RDT
Recessed Room Thermostat
Installation and Operation Guide

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Summary of Contents for EPH Controls RDT

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

  • 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 Menu Function P0 1 Operating Mode Nor (Normal Mode) Delay Start Control (On/O ) Time Proportional Integral Mode (TPI) P0 2 Setting High and Low Limits...

  • Page 3: Installation Instructions

    Mains operated non-programmable Room Thermostat with Setback Installation Instructions...

  • Page 4: Factory Default Settings

    Factory Default Settings High and Low Temp. limitation: Keypad lock: Operating mode: Normal Temperature indicator: ˚C Frost protection: On (5˚C) Setback temperature: 0˚C HYS On: 0.4˚C HYS OFF: 0.0˚C...

  • Page 5: Speci Cations

    Dimensions: 95 x 95 x 40mm 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: Setback temperature: Adjustable 0 to 10˚C EPH Controls Ltd.

  • Page 6: Lcd Display

    LCD Display Displays when setting target temperature. Displays current room temperature. Displays current / target temperature. Displays when changing mode setting. Displays when setting TPI mode. Displays when keypad is locked. Displays when the thermostat is calling for heat. Displays when thermostat is in the OFF mode. Displays when setting HIGH and LOW temperature limit.

  • Page 7: Buttons

    Buttons Standby Button OK Button Down Button Up Button EPH Controls Ltd.

  • Page 8: Wiring

    Wiring 230V on Terminal 4: Thermostat works in Normal mode 0V on Terminal 4: Thermostat works in Setback mode * If mains output is required terminals L and 3 must be electrically linked. Terminal Connections Live In Neutral In Terminal 1 OFF - N/C Normally closed connection Terminal 2 ON - N/O Normally open connection...

  • Page 9: Mounting & Installation

    Prior to setting the thermostat, it is necessary to complete all required settings ƒ described in this section. Before commencing installation, the thermostat must be rst disconnected from ƒ the mains. This thermostat can be mounted 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 40.2 15.2 45 113 EPH Controls Ltd.

  • Page 12: Operating Instructions

    Mains operated non-programmable Room Thermostat with Setback 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.

  • Page 14: Locking The Keypad / Backlight

    Locking the Keypad To lock the thermostat, press and hold for 10 seconds. will appear on the screen. The buttons are now disabled. To unlock the thermostat, press and hold for 10 seconds. will disappear from the screen. The buttons are now enabled. Backlight AUTO There are three settings for selection.
  • Page 15 Press and hold together for 5 seconds. ‘PO1’ will appear 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. EPH Controls Ltd.
  • Page 16 P01 Operating Mode continued Nor (Normal Mode) When the temperature falls below the target temperature, will appear and the thermostat will activate the demand for heat. When the temperature rises above the target temperature, will disappear, and the thermostat will cancel the demand for heat. Graph (14.1): On / O Control Temp 22˚C...
  • Page 17 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 EPH Controls Ltd.
  • Page 18 P01 Operating Mode continued Delay Start Control (On/O ) Continued Delay start can be reactivated by: 1. Press to lower the target below the current temperature. 2. Press to con rm. 3. Press to increase the target temperature above the zone temperature within 6°C .
  • Page 19 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. EPH Controls Ltd.
  • Page 20 P01 Operating Mode continued Time Proportional Integral Mode (TPI) Continued Pb -Proportional Bandwith 2°C This value refers to the temperature below the target at which the thermostat will start to operate in TPI control. You can set this temperature from 1.5°C to 3.0°C in 0.1°C increments. Graph (18.1): TPI Control Temp 22˚C...
  • Page 21 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. EPH Controls Ltd.
  • Page 22 P02 Setting High & 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 ‘HOn’ temperature, press to con rm. ‘HYS’ & ‘ON’ will appear on the screen, press and ‘HYS’ & ‘OFF’ will appear on the screen. Press to con rm. ‘HOFF’ temperature will begin to ash. EPH Controls Ltd.

  • Page 24: P04 Calibrate

    P03 Hysteresis HOn & HOFF continued & to select the ‘HOFF’ temperature. Press to con rm. Press to return to normal operation. P04 Calibrate This menu allows the installer to calibrate the temperature of the thermostat. To access this setting press and hold &...

  • Page 25: P0 5 Setback Mode

    Setback temperature will begin to ash. Press to set the Setback temperature from 0 to 10˚C. Press to con rm. Press to return to normal operation. When Setback mode is operating ‘SB’ will appear on the screen. EPH Controls Ltd.

  • Page 26: Fp Frost Protection

    FP - Frost Protection On 5°C This menu allows the installer to enable or disable frost protection on the thermostat. When ‘ON’ the thermostat will automatically call for heat when the temperature drops to 5˚C. To access this setting press and hold &...

  • Page 27: Resetting The Thermostat

    ‘rSt’ appears on the screen. Press to select. ‘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 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...

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