Timeguard TRT033C User Manual

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Electronic Room

Thermostat

Cat. No. TRT033C

RESET

What is a room thermostat?

...an explanation for householders

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.

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 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 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 18ºC – and then

turn it up by one degree 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. But you can have
different temperatures in individual rooms by
installing thermostatic radiator valves (TRVs)
on individual radiators. If you don’t have TRVs,
you should choose a temperature that is
reasonable for the whole house. If you do have
TRVs, you can choose a slightly higher setting to
make sure that even the coldest room is
comfortable, then prevent any overheating in
other rooms by adjusting the TRVs.

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.

1. Introduction

RESET

TRT products are a cost effective
comprehensive range of thermostats
and timers designed for internal use only.

The TRT033C is a battery powered
electronic room thermostat, with night
set back and frost mode. It has optional
PID control (which can help to minimise
temperature overshoot), and adjustable
swing (difference between on and off
switching temperatures), from 1ºC
to 0.5ºC.

It is designed to be surface mounted
on the wall plate supplied.

The electrical supply must be isolated
before removing the thermostat from
the wall plate.

TRT033C Electronic Room Thermostat

Room temperature
display (control
temperature displayed
flashing during setting)

Shows
when heat
is demanded

Border illuminates

when finding out

or changing set

temperature

Flashing symbol,

battery change

required

Button to
find out or
change set

temperature

Button illuminates

during changes to

set back and frost

settings

Screen illuminates
during setting of
operating parameters

Thumbnail cut out to assist
battery holder removal

Frost/bed

button

Reset

button

RESET

Battery holder

(2 x AA batteries)

Fig. 1

Fig. 1a