Heatmiser DS1-L User Manual

Wiring Diagram

DS1-L

DS1-L

230V Supply

To boiler enable

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To boiler enable

230V Switching ModeVolt Free Switching Mode

Introduction

The Heatmiser DS1-L dial type thermostat is suitable for conventional or
combi-boiler systems.

This thermostat incorporates the following functions;

• Adjustable Switching Dierential

• Digital LCD

• 230v AC, 3A Switching

230V Supply

PDF FAQ

Model: DS1-L

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Installation

IN ORDER TO AVOID ANY RISK OF ELECTRIC SHOCK, TURN OFF THE POWER TO THE

HEATING SYSTEM.

This dial thermostat is designed to be surface mounted.

1. Separate the front part of the thermostat by unscrewing securing screws on the

bottom face of the thermostat.

2. Mark 2 hole positions on the wall using the backplate as a positioning template. Drill at

the marked positions and insert a wall plug in to each hole.

3. Terminate the thermostat as per wiring diagram and screw the DS1-L back plate to the

back box.

4. Reconnect the thermostat front plate and insert the securing screws.

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Setting The TemperatureDisplay Icons

Heating ON Keypad Locked

Lock Facility

The Heatmiser DS1-L has a lock facility. To lock the thermostat, press and hold down the
dial for 10 seconds. You will see a lock symbol appear. To unlock, repeat the steps above.

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Switching Dierential

The Heatmiser DS1-L oers 1, 2 and 3°C switching dierential.

With a 1°C switching dierential the heating will switch on 1°C below the set
temperature and will turn o when the set temperature is reached.

In normal mode, the display shows the actual room temperature. To change the set point,

rotate the dial until the digital LCD displays the new set temperature.

A 2°C will turn the heating on 2°C below the set temperature.

3°C will switch the heating on 3°C below the set temperature.

To set the dierential, you should set the DIP switches according to the table below.
The DIP switch can be accessed from the back of the thermostat (shown opposite).

1 °C Switching

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3

2 °C Switching

3 °C Switching

Switch 1 & 2 OFF

Switch 1 ON and Switch 2 OFF

Switch 1 OFF and Switch 2 ON

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