Heatmiser DT Operating Instructions Manual
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Heatmiser DT Operating Instructions Manual

Heatmiser DT Operating Instructions Manual

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Operating Instructions

Model : DT / PRT
DT-N / PRT-N
This product should be installed by a qualified electrician.
Improper installation may result in injury, death or
property damage.

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  • Page 1: Operating Instructions

    Operating Instructions Model : DT / PRT DT-N / PRT-N This product should be installed by a qualified electrician. Improper installation may result in injury, death or property damage.

  • Page 2: Table Of Contents

    What is a programmable thermostat Installation Initial Setup Procedure 9-12 Symbols Explained Button Layout Temperature Display Setting the Clock Temperature Override Frost Mode Setting the Comfort Levels 17-18 Keylock Wiring DT & DT-N Wiring Diagrams 20-25 PRT & PRT-N Wiring Diagrams 26-31...

  • Page 3: What Is A Room Thermostat

    What is a room thermostat ? A room thermostat simply switches the heating system on and off as necessary. It works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached.
  • Page 4 each day until you are comfortable with the temperature. You won’t have to adjust the thermostat further. Any adjustment above this setting will waste energy and cost you more money. If your heating system is a boiler with radiators, there will usually be only one room thermostat to control the whole house.

  • Page 5: What Is A Programmable Room Thermostat

    What is a programmable room thermostat ? A programmable room thermostat is both a programmer and a room thermostat. A programmer allows you to set On and "Off time periods to suit your own lifestyle. A room thermostat works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached.
  • Page 6 The way to set and use your programmable room thermostat is to find the lowest temperature settings that you are comfortable with and the different times you have chosen and then leave it alone to do its job. The best way to do this is to set low temperatures first, say 18ºC, and then turn them up by one degree each day until you are comfortable with the temperatures.
  • Page 7 You may be able to temporarily adjust the heating programme, for example “Override”, “Advance” or “Boost” These are explained in the manufacturers instructions. Programmable room thermostats need a free flow of air to sense the temperature, so they must not be covered by curtains or blocked by furniture.

  • Page 8: Installation

    Installation Procedure DO’s 1.Do mount the thermostat at eye level. 2.Do read the instructions fully so that you get the best from our product. DON’Ts 1.Do not install near a direct heat source as this will effect the workings of the thermostat. 2.Do not push hard on the LCD otherwise you will damage the liquid crystal display and this is not repairable.
  • Page 9 Step 2 Carefully unplug the ribbon connector which is plugged in to the front half of the thermostat. Place the thermostat front half somewhere safe. Terminate the thermostat as shown in the diagrams at the back of this booklet. Screw the thermostat back plate on to the back box Step 3 Re-connect the thermostat ribbon cable and clip the two halves together.

  • Page 10: Initial Setup Procedure

    How To Setup Your Thermostat This thermostat has many options available to you. Once you have set these settings you can leave them. They will be stored in the thermostat memory and do not need to be adjusted later. You need to use the table opposite as a reference guide when initially setting up the thermostat.
  • Page 11 00=Disabled 01=Enabled (01 = Default) Frost Protection Temp 07-17°C (12°C Default) Output Delay Enter value 00 - 30 minutes (00 = default) Comms (DT-N PRT-N) Enter unique value Optimum Start 00 = Disabled (Default) PRT only 01 01hr 02-02hr 03=03hr...
  • Page 12 Understanding the Features The installer should read the following features and then setup the thermostat according to the features required. Temperature Format: Select between°C or °F Switching Differential: This is the number of degrees the heating switches back on below the set temperature. Temperature Calibrate: The thermostat is calibrated from the factory, but you can use this function to calibrate if required.
  • Page 13 Understanding the Features (Cont) Optimum Start: Optimum start will delay the start up of the heating system to the latest possible moment to avoid unnecessary heating, so that the dwelling is comfortably warm by the programmed time. The thermostat uses the rate of change (See below) setting to calculate how long the building needs to take to raise the building 1°C (With a rate of change of 20, the thermostat has calculated the building needs 20 minutes to raise the building 1°C).

  • Page 14: Symbols Explained

    LCD Symbols Clock Indicator Heat Active Indicator Frost Mode On Keylock On Flashing Optimum Start Mode Active...

  • Page 15: Button Layout

    3. Button Layout Infrared Receiver Clock Down On/Off Button Button Button Button Button Button...

  • Page 16: Temperature Display

    Temperature Display Room Temp = Current room temperature Floor Temp = Current floor temperature (Displayed in Mode 0) SET = Displayed when you are adjusting the temperature setting. Setting the Clock (PRT model Only) To set the clock within the PRT, follow the steps below. •...

  • Page 17: Temperature Override

    Temperature Override Using the Up/Down arrow keys you can adjust the current set temperature. On the screen, you will see SET and the new temperature displayed. This temperature will be maintained until the next programmed comfort level. Press A to accept and exit. Frost Mode By pressing the “H”...

  • Page 18: Setting The Comfort Levels

    Setting the Comfort Levels (PRT Model Only) The PRT has 4 comfort levels for the weekday and 4 for the weekend. This method of control is not to have on/off times but to allow the occupant to set varying temperatures throughout the day. For example;...
  • Page 19 • To begin programming the comfort levels, press clock once. You will see Mo - Fr displayed. • Use the Up/Down arrow keys to select the time for the 1st comfort level for the weekday. • Press H to accept •...

  • Page 20: Keylock

    Enabling Keylock The thermostat has a keylock facility. To enable this press the “A” and “Down” arrow key for 10 seconds. When the keylock function has been activated, you will see on screen. To cancel, repeat the steps above.

  • Page 21: Dt & Dt-N Wiring Diagrams

    MAINS SUPPLY IN DT 240V SWITCHING A1 A2 BOILER RECOMMENDATIONS MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM MAX LOAD 3 AMPS...
  • Page 22 MAINS SUPPLY IN DT VOLTFREE SWITCHING A1 A2 BOILER RECOMMENDATIONS Boiler thermostat or MAX CABLE SIZE 1.5MM timeclock connections BACK BOX DEPTH 35MM MAX LOAD 3 AMPS...
  • Page 23 DT HIGH POWER FUSED MAINS SUPPLY SPUR LOAD ( highly recommended ) MATTING RECOMENDATIONS MAX CABLE SIZE 1.5 mm2 MAX LOAD 13 AMPS BACK BOX DEPTH 35MM...
  • Page 24 DT 240V CHANGEOVER SWITCHING MAINS SUPPLY IN NC NO RECOMMENDATIONS MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM VALVE MAX LOAD 3 AMPS...
  • Page 25 RECOMMENDATIONS DT - N 240V SWITCHING MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM MAX LOAD 3 AMPS + A1 A2 - RT1 RT2 COMMS CABLE A2 B2 POWERED RELAY CARD C NC NO C NC NO MAINS IN TO BOILER...
  • Page 26 RECOMMENDATIONS DT - N VOLTFREE SWITCHING MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM MAX LOAD 3 AMPS + A1 A2 - RT1 RT2 COMMS CABLE A2 B2 POWERED RELAY CARD C NC NO C NC NO MAINS IN TO BOILER THERMOSTAT CONNECTIONS...

  • Page 27: Prt & Prt-N Wiring Diagrams

    MAINS SUPPLY IN PRT 240V SWITCHING A1 A2 BOILER RECOMMENDATIONS MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM MAX LOAD 3 AMPS...
  • Page 28 PRT HIGH POWER FUSED MAINS SUPPLY SPUR LOAD ( highly recommended ) MATTING RECOMENDATIONS MAX CABLE SIZE 1.5 mm2 MAX LOAD 13 AMPS BACK BOX DEPTH 35MM...
  • Page 29 PRT 240V CHANGEOVER SWITCHING MAINS SUPPLY IN NC NO RECOMMENDATIONS MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM VALVE MAX LOAD 3 AMPS...
  • Page 30 MAINS SUPPLY IN PRT VOLTFREE SWITCHING A1 A2 BOILER RECOMMENDATIONS Boiler thermostat or MAX CABLE SIZE 1.5MM timeclock connections BACK BOX DEPTH 35MM MAX LOAD 3 AMPS...
  • Page 31 RECOMMENDATIONS PRT-N 240V SWITCHING MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM MAX LOAD 3 AMPS + A1 A2 - RT1 RT2 COMMS CABLE A2 B2 POWERED RELAY CARD C NC NO C NC NO MAINS IN TO BOILER...
  • Page 32 RECOMMENDATIONS PRT-N VOLTFREE SWITCHING MAX CABLE SIZE 1.5MM BACK BOX DEPTH 35MM MAX LOAD 3 AMPS + A1 A2 - RT1 RT2 COMMS CABLE A2 B2 POWERED RELAY CARD C NC NO C NC NO TO BOILER THERMOSTAT CONNECTIONS MAINS IN...
  • Page 33 Support Tel: 0870 8032 372 Certification mark Revision 2 01/12 Ref. DT1...

This manual is also suitable for:

Dt-nPrt-nPrt

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