Timeguard ProgramaStat TRT037 Operating & Installation Instructions Manual

Wireless 7 Day

Programmable

Room Thermostat

Cat. No. TRT037

Operating & Installation Instructions

Receiver

Transmitter

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.

So, a programmable room thermostat lets you choose what
times you want the heating to be on, and what temperature
it should reach while it is on. It will allow you to select different
temperatures in your home at different times of the day
(and days of the week) to meet your particular needs.

Turning a programmable 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 programmable room thermostat to a lower
setting will result in the room being controlled at a lower
temperature, and saves energy.

The way to set and use your programmable room
thermostat is to find the lowest temperature settings
that you are comfortable with at 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 18°C, and then turn them up by one degree each day until
you are comfortable with the temperatures. You won’t have to
adjust the thermostat further. Any adjustments above these
settings will waste energy and cost you more money.

If your heating system is a boiler with radiators, there will
usually be only one programmable 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.

The time on the programmer must be correct. Some types have
to be adjusted in spring and autumn at the changes between
Greenwich Mean Time and British Summer Time.

You may be able to temporarily adjust the heating programme,

for example, ‘Override’, ‘Advance’ or ‘Boost’. These are

explained in the manufacturer’s 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. Nearby
electric fires, televisions, wall or table lamps may

prevent the thermostat from working properly.

®

What is a programmable room thermostat?

…an explanation for householders

select

set

reset

S ET ROOM TEMP

AM PM

1. Introduction

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

The TRT037 is a battery powered wireless
electronic programmable room thermostat,
with 6 different temperature periods per day,
automatic summer/winter time changeover,
5 day plus 2 or individual (7) day programming,
and a frost mode. There is also the option
of optimum start and adjustable span,
from 1ºC to 0.5ºC.

The TRT037 comes in two parts – a thermostat/
transmitter which is battery powered and
totally wire-free as well as a receiver which
connects into the heating system. This eases
the installation in two ways – there is no
need to bury cable runs to the thermostat/
transmitter and the receiver can be mounted
close to the boiler and other system components.

The two parts are designed to be surface
mounted on their supplied wall plates.

The electrical supply must be isolated before
attempting to install the receiver unit.

select

set

reset

SET ROOM TEMP

AM PM

Programme

access flap

Selects time, temperature

or date to be changed and

is used with button to

enable communication

between the transmitter

and receiver

Reset

button

Button and
screen
illuminate
when pressed
and for 5 seconds
after release

Initiates programme
setting sequence and in
conjunction with the select
button initiates time and
date setting sequence

Border

illuminates

when +/- buttons

are pressed

and for 5 seconds

after release

Fig. 1a

TRT037 Wireless Programmable
Room Thermostat/Transmitter

Learn

A/M

OFF ON

OST

0.5 1.0
SPAN

5-2 7

PROGRAM

Optimum start
jumper

Learn button
enabling
communication
between the
transmitter
and receiver
also controlling
output in
manual

Learn/manual
light

Wall plate retaining screws

(at bottom of TRT037)

Span

jumper

Program

jumper

Automatic/

Manual

mode

button

Output

on light

Fig. 3

Fig. 2

TRT037 Receiver Front View

TRT037 Transmitter Rear View

select

set

reset

SET ROOM TEMP

AM PM

Day of
week

Operates

frost

protection

Time of day
(programme
time during

setting)

Shows when

heat is

demanded

Flashing
when frost
protection
is on

Temperature

override

Flashing symbol,

battery change

required

Selects

current set
temperature
and changes

date, time and

temperature

Room temperature

display

(set temperature

displayed flashing

during setting)

Fig. 1

TRT037 Wireless Programmable
Room Thermostat/Transmitter