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.
Contents
TRT037 thermostat
TRT037 wall plate
TRT037 instruction leaflet
4 x wall plugs
4 x screws
2 x AA batteries
TRT037 receiver
TRT037 receiver
wall plate
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
SP
AN
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
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
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
Lever battery holder outwards using
a large flat bladed screwdriver (shown)
or a large coin.
Left hand
side of TRT037
Battery holder
Fig. 6
Battery Holder Removal
Alternative
fixing holes
Alternative
fixing holes
Retaining tab
Terminal for
maintaining
continuity
of earth
Fig. 4
Receiver Back Plate Removed
Mount the wall plate in this configuration only
Alternative
fixing holes
Retaining tab
Fig. 5
Transmitter Back Plate Removed
Mount the wall plate in this configuration only
COM NC NO N
L
2. Siting
The TRT037 transmitter must be sited where
it would not be influenced by heat sources,
for example, above a radiator or television
or refrigerator/freezer, or in direct sunlight or
subject to draughts. The product requires air
circulation, so do not position above or below
shelving or other wall mounted obstacles.
It should be mounted approximately
1.5m above floor level.
The TRT037 receiver should be mounted close
to the items it will be controlling i.e. boiler,
control valves and pump. It should be mounted
in a position where its control buttons and
indicator lights can be easily accessed.
To reinstall the unit on the wall plate first ensure
the wall plate retaining screws are loosened
enough to clear the TRT037 transmitter body then
engage the top of the TRT037 transmitter onto
the wall plate retaining tabs (see Fig. 5), and
push firmly downwards and then inwards.
Once in place, secure with the retaining screws.
Receiver
Isolate 230VAC mains supply. Incoming and outgoing
wires should be 1.5 sq mm.
Remove wall plate from unit, by undoing retaining
screws (see Fig. 4), and pivoting the bottom of the
wall plate outwards. The TRT037 receiver can then
be lifted off.
Thread the incoming wires through the hole in the
wall plate, and fix wall plate securely to the wall,
using screws (and wall plugs if necessary) provided.
The screws which secure the TRT037 receiver to
the wall plate should point downwards.
Allow sufficient excess cable to wire up the unit,
but not too much to make it difficult to close the
unit onto the wall plate.
Connect the conductors to the relevant terminals,
according to the wiring diagram below (Fig. 7).
Ensure that the curved brass washers grip the
conductors.
The TRT037 transmitter and receiver are
designed to be surface mounted on their
supplied wall plates.
Always isolate the mains supply before
removing the receiver from its wall plate.
Read these instructions in conjunction
with boiler instructions
Transmitter
Lever the battery holder out using a large flat
blade screwdriver or large coin (see Fig. 6) and
then pull out fully.
Insert the 2 x AA alkaline batteries supplied into
the battery holder maintaining the correct polarity
as shown in the base of the battery holder.
Push the battery holder back into place until
it clicks shut.
Remove wall plate from unit, by undoing
retaining screws (see Fig. 5), and pivoting the
bottom of the wall plate outwards. The TRT037
transmitter can then be lifted off.
Fix wall plate securely to the wall, using screws
(and wall plugs if necessary) provided. The screws
which secure the TRT037 transmitter to the wall
plate should point downwards.
3. Installation
Product should be installed by a qualified installer
to current installation standards. If in any doubt
contact the Timeguard Helpline 020 8450 0515.
