Wireless 7 Day
Programmable
Room Thermostat
Cat. No. TRT037
Transmitter
Receiver
Operating & Installation Instructions
What is a programmable room thermostat?
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set
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S ET ROOM TEMP
AM PM
…an explanation for householders
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.
1. Introduction
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set
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S ET ROOM TEMP
AM PM
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.
TRT037 Wireless Programmable
Room Thermostat/Transmitter
Day of
week
Flashing
when frost
protection
is on
Fig. 1
Time of day
(programme
time during
setting)
Temperature
override
Shows when
heat is
demanded
Room temperature
display
(set temperature
displayed flashing
during setting)
Flashing symbol,
battery change
required
date, time and
Selects
current set
temperature
and changes
temperature
Operates
frost
protection
TRT037 Wireless Programmable
Room Thermostat/Transmitter
Button and
screen
illuminate
when pressed
and for 5 seconds
after release
AM PM
Initiates programme
setting sequence and in
conjunction with the select
button initiates time and
date setting sequence
Fig. 1a
Border
illuminates
when +/- buttons
are pressed
and for 5 seconds
after release
S ET ROOM TEMP
Selects time, temperature
or date to be changed and
is used with button to
enable communication
between the transmitter
set
reset
Reset
button
and receiver
select
Programme
access flap
TRT037 Receiver Front View
Learn/manual
light
Learn button
enabling
communication
between the
transmitter
and receiver
also controlling
output in
manual
Fig. 2
A/M
Learn
TRT037 Transmitter Rear View
Optimum start
jumper
Fig. 3
Wall plate retaining screws
(at bottom of TRT037)
Span
jumper
OFF ON
OST
Automatic/
PROGRAM
0.5 1.0
5-2 7
SPAN
Manual
mode
button
Output
on light
Program
jumper
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