Nortek Reznor CRX2 Single Zone User manual

CRX2
Single Zone
Wireless Controller
WARNINGS
Nortek Global HVAC (UK) Limited equipment must be installed and maintained in accordance with the
requirements of the Codes of Practice or rules in force. All external wiring MUST comply with the codes of practice
or rules in force in the country of installation.
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.
Read instructions before installing or servicing this equipment.
Reznor® Is a registered trademark of Nortek Global HVAC, LLC.
INSTALLATION AND OPERATING MANUAL
ErP
2018 Part No. D301043 Issue A

Getting to know your CRX2 wireless controller
1. Pairing CRX2 with heaters
This must be done, otherwise the heaters will
not work.
Power up the CRXSL (see section ‘Power
options’ for details). There are 2 different
sequences used for pairing. The sequence
used will depend on the heater.
To find out which sequence to use, check the
heater rating label and identify the model
number.
If the heater is ‘RX’ and the last two digits are
lower than 10 use sequence 1.
If the heater is ‘RX’ and the last two digits are
10 or higher use sequence 2.
If the rating label is not visible, follow the
steps below:
• Ensure the heater is switched OFF.
• Switch the heater ON and observe the LED
status light.
• If the LED flashes red then goes green use
sequence 1.
• If the LED is solid green use sequence 2.
Sequence 1
Set heater into pairing mode as follows:
1. Locate the heater LED status light.
2. Turn power to the heater ON. Count 4
seconds, or count 5 red flashes of the status
light on the heater.
Turn power OFF.
3. Turn power back ON. The heater status
light should be flashing green. (If the light
is not flashing green, the 4 second timing
was incorrect. Repeat step 1.)
4. The heater is now ready for pairing with
CRXSL.
The next 3 steps must be done within 30
seconds. After 30 seconds the heater will
return to normal operating mode. Set the
CRXSL into pairing mode as follows:
1. Touch and hold P and M icons together
for 5 seconds.
2. The display will show CRXSL identification
code.
3. Touch the P button while the light on the
heater is flashing green.
If the pairing was successful, the light will stop
flashing and the heater is paired with CRXSL.
This has to be done within 30 seconds. After
30 seconds, the CRXSL will return to normal
operating mode.
Sequence 2
Set heater into pairing mode as follows:
1. Locate the heater status light.
2. Turn power to the heater ON. The light
should be solid green.
The next step must be done within 20 seconds.
After 20 seconds, the heater will return to
normal operating mode. Set the CRXSL into
pairing mode as follows:
1. Touch and hold and icons together for 5
seconds.
2. The display will show CRXSL identification
code.
3. Touch the P button and the CRXSL will
beep & flash 3 times.
If the pairing was successful, the light will
show red and the heat output will switch on
and stay on if the CRXSL is signalling the heat
output to be on. If the CRXSL is signalling the
heat output to be off, the heat output will
only switch on for a short period of time to
show pairing was successful.
An illustration of functions available on CRX2
2

2. Basic Operation
Before you can use CRX2, it has to be activated by
tapping any control icons. The LCD screen back-
light will turn on.
To operate any control icon, tap within 2 seconds
of CRX2 activation.
3. Time and day setting
• To enter time setting touch and hold for
5 seconds.
• The minutes will flash.
• Use or to set minutes.
• Tap , the hours will flash.
• Use or to set hours.
• Tap , the MON will flash.
• Use or to select day.
• Once you are happy with the settings, leave
the CRX2 for 20 seconds.
• The settings will be saved and CRX2 will
return to the main screen.
4. Selecting operating mode
CRX2 has four operating modes:
BOOST, MANUAL, SET BACK and PROGRAM.
Each mode can be selected by activating the CRX2
and tapping to cycle through the options. The
cycle sequence will always start with BOOST mode
followed by MANUAL , SET BACK and PROGRAM .
5. MAN - Manual Mode
In manual mode, the heater maintains the set
temperature.
• Tap or to set the temperature.
To amend the set temperature, tap any control
button once to activate, then tap or to
change the temperature. Once the temperature
is set, leave the thermostat and the settings will
be saved.
6. BOOST - 15 minutes
The boost feature temporarily increases the room
temperature. It can be used from any mode.
• Tap or to set the temperature.
To amend the set temperature, tap any control
button once to activate, then tap or to
change the temperature.
Once the temperature is set, you can leave the
thermostat and the settings will be saved. After
15 minutes, the CRX2 will return to previous oper-
ating mode.
7. PROG - Automatic time mode
In this mode, the CRX2 will follow the week’s time
/ temperature programme.
You can override the temperature in PROG mode
by simply activating the CRX2 and using the
or icon to set the new temperature. The new
set temperature will be then maintained until the
next program step.
• Tap to ADVANCE program, tap again to
go back.
8. SETB - ECONOMY automatic time
mode
In the setback (ECONOMY) mode, CRX2 lowers
all temperatures in the 7-day programme by a
set value.
06:00
10
20
08:00
19ºC
4ºC
ºC
12:00
22ºC
14:00 16:00
16ºC
22ºC
10ºC
22:00
PROGRAM 1 PROGRAM 2 PROGRAM
3 PROGRAM 4
PROGRAM 5 PROGRAM 6
An example of one day programme on CRX2
9. Set 7-day programme
3

-SET HOURS FOR PROGRAM
TIME SETTING PROGRAMME SETTING
-SET MIN UTE S
-SET DAY
-SET HO UR S
-SELECT D AY TO SET
-SET MIN UTE S FO R PR OGR A M
-SELECT PRO GR AM TO SE T
-SET TE MPERATURE FOR PROGRAM
1. Touch and hold for 5 seconds to enter the time setting.
2. The minutes will flash.
3. Tap or to set the minutes.
4. To set hour, tap and the hour will begin to flash.
5. Tap or to set the hour.
6. To set day, tap and the day will begin to flash.
7. Tap or to select the day.
8. Tap to access the 7-day programming mode.
9. Tap or to select the day you want to set.
10. Tap to set programme 1 for selected day (Indicated by the flashing number).
11. Tap to select minutes.
12. Tap or to set minutes.
13. Tap to select hour.
14. Tap or to set hour.
15. Tap to select temperature setting.
16. Tap or to set temperature.
Logic diagram for setting programme on CRX2
9. Set a 7-day programme (continued)
The CRX2 has a 7-day timer with up to 6 program-
ming steps available for each day. In the program-
ming you can set a start time and a temperature
for each programme.
Each programme has to be used or set inactive.
10. Set a programme inactive
To deactivate a programme, enter the program-
ming mode. Select the programme you want to
make inactive and tap . The time and temper-
ature will now be dashes to indicate that the
programme has been deactivated. In order to re-ac -
tivate the temperature setting, tap again.
11. Copy day function
The CRX2 allows you to copy a day’s heating
programme to save time re-entering the same
time and temperature settings for a day.
1. To use a copy day function, enter the
programming mode.
2. To skip time setting, tap to cycle through
hour and day.
3. On the next tap, the Programme mode is
activated and the day will flash.
4. Tap to activate the COPY DAY function.
5. Tap to select the day you want to copy
the temperature settings from.
6. Tap or to select the day you want to
copy the temperature settings to.
7. Tap to confirm the selection. The ‘to’
word will flash to indicate that the day
programme has been copied to the day
selected.
8. Tap to go back to the Programme mode.
12. Fan function (Only available for fan
heaters)
Tap any control icon to activate the CRX2. Tap
to activate or deactivate the fan function.
13. Advance mode
Tap from SETB or PROG mode to bring forward
next programme. To clear advance mode, tap
14. Keys locking
Tap and hold together for 5 seconds. The
display will show symbol. Repeat the step to
unlock.
15. Head symbol on the display
Every time there is a demand for heat, the display
will show the heat icon.
Reduced heat output when the room temper-
ature is close to the set temperature.
Full heat output
4

19. Batteries
Remove the CRX2’s battery cover and insert 4 new
high quality alkaline AAA batteries.
Warning: Nortek is not responsible for damage
due to corrosion. Battery leakage will cause perma-
nent damage. Do not use batteries when unit is
powered on with mains.
To help avoid battery leak:
• Replace the batteries annually, even if there
is not a low battery warning. Remove failing
or flat batteries immediately.
• Always fit a pair of new high quality alkaline
batteries from the same pack. Never mix
new and old batteries, or batteries of
different brands or types.
• Never attempt to revive alkaline batteries by
heating, crushing or recharging.
Note: The clock has to be set after replacing the
batteries, or if the USB power cable has been
removed from the CRX2.
20. Power adapter for fixed installation
The CRX2 controller is supplied with a power
adapter that will fit a 35mm or a 25mm metal or
dry lining back box. The power adapter should
only be connected to a wiring protected by a 6A
fuse or 6A circuit breaker.
Connect line and neutral conductors to the
terminal block. Please note that the adaptor
supplied with the controller must be installed
exactly as the figures show, otherwise the USB
connector will not fit correctly. The centre of the
back box must be kept clear to allow room for the
USB connector.
When fitting the wall bracket, ensure that the
adaptor is installed properly and feed the cable
through the centre of the bracket. Screw the
bracket to a back box taking care not to damage
the power adaptor or leads by long screws.
Connect the USB cable into the power port at
back of the controller as shown on the photo.
Check that the CRX2 is working. Attach top of
the CRX2 to the wall bracket and slowly tilt it to
place observing that the USB connector is moving
in to the opening freely. Once the controller is in
place secure the two screws on the bottom of
the controller.
Please note that the controller screen will take
up to one minute to display after powering up
for the FIRST time.
Light Colour Heater status
STAND-BY No heat input
Reduced heat input
Full power heat output
Heater is ready for pairing with CRX
FAULT - Overheating
FAULT - Connection CRX lost
FAULT - Connection lost
Power option, installation guide and setup menu
The CRX2 is a wireless thermostat giving high precision room temperature
control. It is also a 7 day programmer with up to 6 temperature settings per
day. Each CRX2 can control any number of heaters in the same room (zone).
17. Choosing a position in a room
The CRX2 should be fixed to the wall or used with the table top bracket. Avoid
areas with draft or direct sun.
Do not position CRX above or close to the heaters or other heat sources. Damp
areas or areas where CRX2 can be mechanically damaged should also be avoided.
18. Power options
The CRX2 controller can be powered either by a 5V power adapter with a micro
USB connector, supplied power adapter via USB port or 4 AAA batteries. There
are 2 available USB ports for power. One port is located on the bottom and
one at the back of the controller.
16. Status light on heater
5

21. Open window detection
Ensuring you don’t waste energy on heating the
outside world, the heater is equipped with optional
open / closed window detection.
The heater recognises sudden drops in temperature
when a window or a door is opened and turns the
heating off to save energy. When the window is
closed, the heater will automatically detect a temper-
ature rise, and switch itself back on.
Once enabled in the setup menu, the open window
detection is fully automatic and does not require any
human intervention to be activated.
22. Setting-up Open Window Detection
The system has been factory set to default time
and temperature values. If necessary, all values can
be adjusted.
When the heating is on, open window detection
sensor will automatically switch the heater off when
it detects a fall in temperature of 2°C in less than 10
minutes (this temperature can be changed in menu
7 and time in menu 6).
If a temperature rise of 2°C in less than 30 seconds
is detected, the heater will switch itself back on
(this temperature can be changed in menu 9 and
time in menu 8).
USB power ports
Temperature sensor
Locking screws
Wall fixing
Wall fixing
Power adapter for fixed installation
23. Setup menu
1. Touch and hold and icons together for 10 seconds.
2. The CRX2 will enter the setup menu.
3. Use and to change a value.
4. Use to scroll between the settings.
5. Temperature calibration
The temperature reading has been factory calibrated but if for any reason it
needs adjusting (better accuracy required, to suit different position in the room
etc.), the reading can be recalibrated in 0.5 degrees steps.
Please note that if the unit is powered by the power adapter, the temperature
reading REQUIRES recalibration. Lower the value by 1.5 degrees.
6. Change between degrees Celsius or Fahrenheit
7. Set minimum temperature (- - - = heating OFF, 4deg = frost protection)
8. Set maximum temperature
9. Information about the software version
10. 0 or 1 manual mode enable / disable
11. Open window detection 0 = off, 1 = on
12. 600 - open window detection time 600 seconds
13. 2 - temperature drop of 2°C in the detection time
14. 30 - closed window detection time of 30 seconds
15. 2 - temperature rise of 2°C in the detection time
The CRX2 is guaranteed for one year against faulty material or workmanship. This applies only if the appliance has been used for purposes in
accordance with the instructions provided and has not been misused, neglected, damaged, modified or repaired by any person not authorised by
us. This guarantee is offered to you as an extra benefit and does not affect your legal rights.
Reasonable care has been taken to ensure that this guide is accurate at the time of printing. In the interest of progress, the Company reserve the
right to vary specifications from time to time without notice.
Should you need any advice on the use of your new Nortek product, or should you require service or repair, please contact our Helpline:
6

Nortek Global HVAC (UK) LTD
Fens Pool Avenue, Brierley Hill
West Midlands, DY5 1QA
United Kingdom
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.reznor.eu/
Registered in England No˚ 1390934
Registered Office: The Colmore Building, 20 Colmore Circus Queensway, Birmingham, West Midlands, B4 6AT
AFFIX AGENTS DETAILS HERE
This document replaces the previous, Manual Part No: Reznor, CRX, EN, Mar, 18, D301043 Current full Part No. Reznor, CRX, EN, Jan, 19, D301043 Issue A