7 Day Programmable
Room Thermostat
Model: TRT035N
Ins t allation & Oper ating Ins tructions
1. General Information
These instructions should be read carefully and retained for further reference
and maintenance.
2. Safety
• Before installation or maintenance, ensure the mains supply to the
programmable room thermostat is switched off and the circuit supply
fuses are removed or the circuit breaker turned off.
• It is recommended that a qualified electrician is consulted or used for
the installation of this programmable room thermostat and install in
accordance with the current IEE wiring and Building Regulations.
• Check that the total load on the circuit including when this programmable
room thermostat is fitted does not exceed the rating of the circuit cable,
fuse or circuit breaker.
• To clean use a clean dry cloth only. Do not use any liquid cleaners.
3. Technical Specifications
• 230V AC 50 Hz
• This thermostat is of Class ll Construction and must not be earthed
1
• Switch Rating: 3(1)A
• Switch Type: Single pole, voltage free
• Connection Type: 2 wire
• Installation Type: Surface mount with wall plate
• Micro Disconnection: Type 1.B control action
• Operating Temperature Range: 0°C to +40°C
• Set Temperature Range: 10°C to 35°C
• Temperature Swing Adjuster: +/- 0.5°C or 1.0°C set by DIP switch
• Optimum Start Time
(OST) Adjustment: ON or OFF set by DIP switch
• Frost Protection Mode: 5°C, Fixed
• Sleep Mode: Suspends all output, turns off display
changeover contacts
• Illumination: Blue LED illuminated on setting
for button surrounds and display
• Batteries: 2x 1.5V AA
• CE Compliant
• Dimensions (H x W x D): 90 x 135 x 30mm
TRT035N Front View
Digital room temperature/time
display (illuminated on setting)
10°C to 35°C
set temperature
range
2
The heating
symbol will show
when heat is
demanded
Battery
compartment
located on the
side, accessible
from rear of
transmitter
Light/Frost
protection button
+/- setting buttons
(illuminated on setting)
Flip down cover conceals
setting buttons
4. Siting
• The TRT035N must be sited where it will not be influenced by heat sources,
for example above a radiator or a television or a refrigerator/freezer or
in direct sunlight or subjected 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 1.5 metres above floor level.
5. Installation
5.1 Ensure the mains supply is switched off and the circuit supply fuses are
removed or the circuit breaker turned off.
5.2 Remove the wall plate from the receiver unit, by undoing the retaining
screws, and pivoting the bottom of the unit outwards.
The TRT035N body can then be lifted off.
5.3 Mark the position of the mounting holes on the wall using the wall
plate as a template. Drill out the mounting holes taking care to avoid
any joists, electrical cables or water/gas pipes that may be hidden
beneath the surface. Insert the rawl plugs into the holes.
5.4 Pass the 230V 50Hz mains supply and load cables through the opening
3
of the wall plate. Allow sufficient excess cable to wire up the unit, but
not too much to make it difficult to close the unit to the wall plate.
5.5 Fix the wall plate to the wall using the correct mounting screws for
the rawl plugs installed. The retaining screws which secure the unit
to the wall plate should be at the bottom.
5.6 Terminate the cables into the terminal block ensuring correct polarity
is observed and that all bare conductors are sleeved (See section 6.
Connection Diagram). Make sure that the curved washer grips
the conductor.
5.7 To insert batteries into the unit, access the battery compartment located
on the left side/rear of the unit. Use a small flat head screwdriver
and release the lug and lever out the battery compartment. Insert the
2x AA batteries (supplied) maintaining the correct polarity, as shown
in the base of the battery compartment. Push the battery compartment
back into place until clicks shut.
5.8 To reinstall the unit onto the wall plate, first ensure the wall plate
retaining screws are loosened enough to clear the TRT035N body,
then engage the top of the TRT035N onto the wall plate retaining tabs,
and push firmly downwards and then upwards. There will be some
resistance from the terminals.
5.9 Once in place, secure with the retaining screws making sure
not to over tighten.
TRT035N Wall Plate
4
Alternate mounting holes
Battery compartment lug
Release the lug and
lever out the battery
compartment to the right
Retaining tabs
Loop terminal
Mounting
holes
Wall plate retaining screws
6. Connection Diagram
Connect the 230V 50Hz mains supply and load cables to the terminal block
which are marked as follows;
• Note: Check boiler
instructions before
connecting.
5
230V AC
50Hz
MAINS
SUPPLY
NCNO
Switch Live from NO
(normally open contact
for heating) to bolier
BOILER
Supply
Neutral
230V 50Hz Mains Supply
Live Supply (Brown or Red) to L
A ‘Loop Terminal’ is provided should a 3 core cable
be used
Load (Boiler)
Switch Live (Brown or Red) to NO
COM
Supply
Live
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