ESI ESRTM User Instructions

ESRTM

Mechanical Room
Thermostat

User Instructions

Thank you for choosing ESi Controls.

All our products are tested in the UK so we are
confident this product will reach you in perfect
condition and give you many years of service.
However, for additional peace of mind, we
recommend you register your product online at
www.esicontrols.co.uk/warranty for your
extended warranty.

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User Instructions

What is a Mechanical Room Thermostat?
An explanation for householders 4

An introduction to the ESRTM 5

Contents

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An explanation for householders

A room thermostat simply switches the heating system on
and off based on room temperature. 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.

Turning a room thermostat to a higher setting will not make
the room heat up any faster. How quickly the room heats up
depends on the design of the heating system, for example,
the size of the boiler and radiators. Neither does the setting
affect how quickly the room cools down.

Turning a room thermostat to a lower setting will result in
the room being controlled at a lower temperature, and saves
energy. The heating system will not work if a time switch or
programmer has switched it off. The house insulation quality
is a key factor in heating control. The way to set and use your
room thermostat is to find the lowest temperature setting that
you are comfortable with, and then leave it alone to do its
job. The best way to do this is to set the room thermostat to a
low temperature – say 18°C and then turn it up until you are
comfortable with the temperature (20°C is the usual preferred
set point). 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 thermsotat to control the whole
house (but building regulations Part L require houses above

What is a Mechanical Room
Thermostat?

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a certain size to have more than 1 heating zone). Room
thermostats need a free flow of air to sense the temperature,
so they must not be covered by curtains or blocked by
furniture. Nearby electric fires, televisions, wall or table lamps
may prevent the thermostat from working properly. Also keep
out of direct sunlight.

N.B. Some thermostats can be used for cooling as well as

heating (SPDT).

Introduction to the ESRTM

This mechanical room thermostat is an economical and
simple to use room thermostat. Simply turn the mechanical
control dial to your desired temperature to control your room
temperature.

This unit also produces an audible “click” when you turn the
dial past the current temperature so you know when the
system is being turned ON or OFF. This mechanical 2 wire
thermostat is very easy to install and having volt free contacts
is suitable for systems with either a combination or normal
boiler. If you have a three wire installation, simply cut back
and make safe the neutral and this two wire thermostat will
give you years of faithful service.

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We are continuously developing our products to
bring you the very latest in energy saving technology
and simplicity. However, should you have any questions
setting up your controls please email us at
[e-mail] or for technical queries call
us on our dedicated technical helpline 07539 117468.

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WARNING: Interference with sealed parts renders the
guarantee void.

In the interests of continuous product improvement we reserve
the right to alter designs, specifications and materials without
prior notice and cannot accept liability for errors.

Version 6.10.2

© ESi Controls Limited 2017