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
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 ther-
mostat 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
18oC, and then turn them up by one degree each day
until you are com-
fortable 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
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
