BN Thermic RT26 User manual

Thank you for purchasing a BN Thermic product. Manufactured to a high standard, this product will,
if used according to these instructions and properly maintained, give you years of trouble free
performance. Please ensure instructions remain with your customer for their reference.
SECTION A –USER INSTRUCTIONS.
For installation instructions go to page 4
1. INTRODUCTION & SPECIFICATION.
The RT26 Thermostat is an easy to install and use 7 Day, 6/1
Day or 5/2 Day Programmable Thermostat which offers four
time and temperature changes each day. It is designed to provide
automatic time and temperature control for heating applications
using air temperature or a remote-mounted temperature sensor.
All settings are stored in the controller with battery back-up.
RT26- Programmable Heater Controller
Programming
7 Day, 6+1 Day or 5+2 Day (Default 5+2 Day)
Power Supply
230V ac 50 Hz 16A Maximum Load (Battery back-up)
Remote Sensor (Optional)
NTC (10KΩ) +/- 0.5°C at 20°C
Temperature Range
1°C to 45°C (Default 5°C to 30°C)
Display
LCD + back light that comes on for short period when any button
pressed.
Number of Programs Per Day
4
Tamper Resistant
Facility for locking all buttons or just temperature adjustment
buttons.
Dimensions
125mm (H) x 125mm (W) x 90mm (D).
Electrical Protection
IP20
Complies with:
EN 301489-1, EMC Directive 2014/30/EU,
EN60950-1:2006+a11:2009+a1:2010+a12:2011+
a2:2013
IMPORTANT: PLEASE READ THESE INSTRUCTIONS, NOTE THE SAFE
OPERATIONAL REQUIREMENTS, WARNINGS, AND CAUTIONS. USE THIS
PRODUCT CORRECTLY,AND WITHCAREFORTHEPURPOSEFORWHICHIT
ISINTENDED.FAILURETODOSOMAY CAUSE DAMAGEAND/ORPERSONAL
INJURY AND WILL INVALIDATETHE WARRANTY.
INSTRUCTIONS FOR:-
PROGRAMMABLE CONTROLLER
Model:- RT26
REGISTER: PLEASE REGISTER THIS PRODUCT ONLINE TO ACTIVATE
YOUR GUARANTEE AT www.bnthermic.co.uk

2. OPERATING GUIDE.
To Set Time and Week Day Number
a) Turn thermostat on by pressing button.
b)Press the button and the minutes will start to flash. Adjust the minutesby pressing the or
buttons. When correct, press button and the hours will flash. Set these by pressing the or
buttons. When correct, press button and the day number will flash. Set this by pressing the or
buttons. When correct, press . Note that Monday is 1, Tuesday 2 etc. If you don’t press a button
for 5 seconds display returns to standard mode and you will need to repeat section b.
Programming -The controller is preset to the following times and temperatures:-
Period
Day
Number
Wake up
Outdoor
Back home
Sleep
1
06:00
20⁰C
08:00
15⁰C
17:00
20⁰C
22:00
15⁰C
2
06:00
20⁰C
08:00
15⁰C
17:00
20⁰C
22:00
15⁰C
3
06:00
20⁰C
08:00
15⁰C
17:00
20⁰C
22:00
15⁰C
4
06:00
20⁰C
08:00
15⁰C
17:00
20⁰C
22:00
15⁰C
5
06:00
20⁰C
08:00
15⁰C
17:00
20⁰C
22:00
15⁰C
6
08:00
20⁰C
10:00
15⁰C
16:00
20⁰C
23:00
15⁰C
7
08:00
20⁰C
10:00
15⁰C
16:00
20⁰C
23:00
15⁰C
2

By default the controller is set to 5+2 days this means when programming Monday –Friday settings
will all be the same and you can then program different settings for Saturday –Sunday. If you require
7 day or 6+1 day settings enter defeult settings and adjust paramenters first (See section 5).
To adjust or program the time & temperature periods
a) Make sure the thermostat is on, or turn on by pressing button.
b) Press and hold the button for 3-5 seconds until the time starts to flash, display will also show
“ 1 2 3 4 5 ” and the first period symbol will show. Adjust the hours by pressing the or
buttons. When correct, press button and the minutes will flash. Set these by pressing the
or buttons. When correct, press button and the temperature will flash. Set this by pressing
the or buttons. When correct, press and the second period symbol will show and the
hours will flash. Now repeat the above to set all 4 periods. Once set, the days will change to 6+7
and you repeat the above procedure to program Saturday and Sunday. Note “ 1 2 3 4 5 ” on the
display while programming means you are setting all 5 Weekdays “6+7” on the display while setting
means you are programming Saturday & Sunday. If you don’t press a button for appox 5 seconds
the controller will automatically store the settings and exit programming mode.
Run Modes
1 –Turn thermostat On or Off by pressing the button.
2 –When “ON” press to toggle between Auto mode and Manual mode .
3 –When in Auto mode you can override the set tempreture by pressing the or buttons.
This override will last until the next program period and is shown by both the and symbols.
4 –When in Manual mode you can override the set tempreture by pressing the or
buttons. Note:- The thermostat will stay in Manual mode with the same set temprature until you
switch it to Auto mode or turn the thermostat off.
At any time you can return to the auto temperature set point by pressing the button until only
the Auto mode shows.
Locking the controller
The controller has 2 lock settings selected in the default settings (see section 5). Half lock, when
set only allows the On/Off button to be pressed. Full lock disables all buttons except the unlock
sequence. Putting the controller in lock mode indicated by a symbol on the screen is done by
pressing and holding the button until the symbol appears. Unlocking is the reverse process.
Holiday Mode
Holiday days (count down) and temprature set point can be set so that the heating runs at a lower
temprature whilst you are away and reverts back to normal when you return. To access, make sure
controller is on and then press button for 3-5 seconds until the screen displays Off change to
On by using the or buttons. Then press button to set the number of days you are away.
Then press button to set the temperature required while you are away. Holiday mode is shown
by a symbol displayed on the screen. Once set, to exit holiday mode early press the button.
3

SECTION B –INSTALLATION AND MASTER SETTINGS.
3. INSTALLATION SAFETY INSTRUCTIONS.
3.1 ELECTRICAL SAFETY
WARNING! It is the responsibility of the owner and the installer to read, understand and
comply with the following:
You must check all electrical products, before use, to ensure that they are safe. You must
inspect power cables, plugs, sockets and any other connectors for wear or damage. You
must ensure that the risk of electric shock is minimised by the installation of appropriate
safety devices. A Residual Current Circuit Breaker (RCCB) should be incorporated in the
main distribution board. If in any doubt consult a qualified electrician.
You must also read and understand the following instructions concerning electrical safety.
▪The Health & Safety at Work Act 1974 makes owners of electrical appliances responsible
for the safe condition of those appliances and the safety of the appliance operators. If in any
doubt about electrical safety, contact a qualified electrician.
▪Installation should always be carried out by a qualified electrician or a competent person in
accordance with current electrical regulation.
▪Ensure that the cables are always protected against short circuit and overload.
▪The unit should be protected by a suitably rated isolator and fuse or MCB.
▪The aluminium case must be suitably earthed.
▪This controller is IP20 rated and is suitable for indoor or under cover use only.
3.2 GENERAL SAFETY INSTRUCTIONS
✓Remove all packaging and store it away from children, check the package and controller for
visible damage or tampering.
✓Familiarise yourself with the applications and limitations of the controller.
✓Only use recommended attachments and parts. To use unauthorised parts may be
dangerous and will invalidate your warranty.
XDO NOT use in areas where hazardous gasses or dusts may be present.
XDO NOT disassemble the controller for any reason. There are no user serviceable parts
inside.
XDO NOT use this controller to perform a task for which it has not been designed.
Please leave the user instructions with the end user where they should be kept in a safe
place for further reference.
4

4. INSTALLATION.
The RT26 thermostat can be used with its internal air sensor or if required with an optional remote air
sensor or optional remote black bulb sensor. A maximum load of 26A (6,000W) can be directly
controlled by the thermostat. Should you require a larger load addition relay boxes can be addedeach
givinganadditional26A (6000W)load. Upto6extrarelayboxesmaybeadded(Product code-RB26).
4.1 CHOOSING A LOCATION FOR YOUR RT26 OR REMOTE SENSORS
The RT26 controller or sensors should be mounted on an internal wall approximately 1.5 meters from
floor level and should be in a position away from draughts, direct heat and sunlight.
If you decide to use remote sensors you will need to change “A4” to “N2” on the master / default
settings. See page 7 for more information.
5
Optional Air Sensor
Part No. CXS
Optional BlackBulb Sensor
Part No. BBS
Optional IP RatedBlack
Bulb Sensor
Part No. BBSIP

4.2 INSTALLING THE RT26
Screw the RT26 in position using suitable
fixtures and fittings.
There are 4 holes in the corners of the case,
or you can drill additional holes in the back.
1) Wire the thermostat as per picture to the
right,makingsurealltheterminalsaredone
up tightly.
2) Ifyou are using a remote sensor connectto
terminals5and6(markedNTC).Theseare
positioned on the thermostat mounted on
the front cover. You can use any insulated
copperwire. Polarity of the sensor does not
matter. (you will also need to change the
default settings to activate the remote
sensor see page 7)
3) DoNOT exceedtotalloadof26A.Forloads
greater than this, use an additional relay
box (RB26) or contactor. If using a
contactor the thermostat must only control
the coil of the contactor.
4) To connect an additional relay box to the
thermostat connect brown wire (Live)
between P1 andterminal 1 oftherelay box.
Connect blue wire (Neutral) between P2
and terminal 2 of the relay box. Connect
yellow & green wire (Earth) between Earth
connection on the Thermostat and Earth
connection on the relay box. Use 0.75mm²
3 core cable. (See picture below)
Back view of thermostat
mounted on the lid

5. CHANGING THE MASTER / DEFAULT SETTINGS.
There are various master / default settings that can be changed by entering the default settings.
To enter these settings, turn off the thermostat by pressing the button. Then press and hold the
button for 3-5 seconds until the A1 appears on the screen. You are now in settings mode and if
you don’t press any button for 5 seconds the display reverts back to off mode.
Press button to switch to nextoption and press or buttons to adjust the data. If you wish
to exit the settings without waiting 5 seconds press the button.
No.
Setting Options
Data Setting Function
Default
A1
Temperature calibration
-9⁰C to +9⁰C in 0.5⁰C steps. (Can be used to
tune temperature reading so it matches another
thermostat)
0⁰C
A2
Differential between set point
and On and Off
0.5⁰C - 2.5⁰C in 0.5⁰C steps.
0.5⁰C
A3
Remote sensor differential
1⁰C - 9⁰C in 1⁰C steps.
2⁰C
A4
Temperature sensor used
N1= Built in temperature sensor.
N2= Remote temperature sensor.
N3= Do NOT use. Select either N1 or N2.
N3
See Note A
below
A5
lock settings
0 = half lock 1 = full lock
0
A6
Maximum set point of remote
sensor.
5⁰C - 45⁰C
27⁰C
A7
Minimum set point of remote
sensor.
1⁰C - 10⁰C or ( = Not active)
5⁰C
A8
Minimum set point of internal
sensor.
1⁰C - 10⁰C
5⁰C
A9
Maximum set point of internal
sensor.
20⁰C - 45⁰C
30⁰C
AA
Power Cut function.
0 = Power heating as per controller memory.
1 = Shut down controller after power cut.
2 = Shutdown heating but turn controller on
after power cut.
0
AB
Programming selection
0 = 5 + 2 (same settings Mon-Fri + Sat-Sun)
1 = 6 + 1 (same settings Mon-Sat + Sun)
2 = 7 (different settings each day Mon-Sun)
0
AC
Window Opening detection
= Not active
10 - 20⁰C = Sudden drop set point at which
heating turns off.
AD
Window Opening OFF period
5 - 40 minutes (only if AC above is set to a
temperature and not ).
10
AE
Factory Reset
Press & hold key until whole screen shows.
If you Factory Reset please ensure you set A4
above correctly otherwise the thermostat will
give you an error message.
NOTE A –Unit supplied with sensor set to N1 (internal sensor) BUT if you perform a “Factory reset” this will need to
be reset from N3 back to N1 or N2.
7

6. SENSOR FAULT CODES.
E1 or E2 fault codes are displayed if the temperature sensors are faulty or are not connected. The
thermostat will stop heating until the fault is corrected.
E1= Internal sensor faulty.
E2 = External sensor faulty or missing / not
present.
If in the master settings shown overleaf, you have
selected N3 for option A4 (Sensors used) you will
get a fault code and the thermostat will not work,
please select either N1 if you are using the
internal sensor or N2 if you are using an external
mounted sensor.
7. FUSE.
Before removing the cover to the thermostat make sure you have isolated all sources of power.
Please Note: There may be more than one power source entering the enclosure.
The thermostat is protected by a 1A fuse this is positioned underneath the clear plastic cover.
Fuse size is 5mm x 20mm long.
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and
component parts without prior notice.
REGISTER: Activate your warranty by registering online at www.bnthermic.co.uk
and retain this installation data for future reference.
IMPORTANT: No liability is accepted for incorrect use of this product.
WARRANTY: Your BN Thermic product is guaranteed for one year from date of
purchase. We will repair or replace at our discretion any part found to be defective. We
cannot assume any consequential liability. This guarantee in no way prejudices your
rights under common law and is offered as an addition to consumer liability rights. RT26INS-v01
This productconformstoEUDirective2002/96/EC.
Thisappliancebearsthesymbolofthecrossedwastebin.Thisindicatesthat,attheendofitsusefullife,itmustnotbedisposed
of as domestic waste, but must be taken to a collection centre for waste electrical and electronic equipment. It is the user's
responsibility to dispose of this appliance through the appropriate channels. Failure to do so may incur penalties established
bylawsgoverningwaste disposal.
BN ThermicLtd,
34Stephenson Way,
Crawley,RH101TN
Tel: [phone]
Email:[e-mail]
Web: www.bnthermic.co.uk