White Rodgers BNP125 Wiring diagram

Line Voltage Non- Programmable Thermostat
Installation Instructions & User Guide
Congratulations on the purchase of your
White-Rodgers™thermostat!
Save these instructions for future use!
Questions? Contact White-Rodgers
TM
Customer Service at 1-877-654-9394
For BNP125, BNP150C, BNP125C, 1E65-140
37-7460A

WARNING WARNING
Before installing and operating this product, the owner and/or installer must read,
understand and follow these instructions and keep them handy for future reference.
If these instructions are not followed, the warranty will be considered null and void
and the manufacturer deems no further responsibility for this product. Moreover,
the following instructions must be adhered to in order to avoid personal injuries or
property damages, serious injuries and potentially fatal electric shocks. All electric
connections must be made by a qualied electrician, according to the electric and
building codes effective in your region. Do NOT connect this product to a supply
source other than 120 VAC or 240 VAC, and do not exceed the load limits specied.
Protect the heating system with the appropriate circuit breaker or fuse. You must
regularly clean dirt accumulations on the thermostat. Do NOT use uid to clean
thermostat air vent. Do not install thermostat in a wet place. However, installing it
in isolated walls is allowed.
Note:
When a part of the product specication must be changed to improve operability or
other functions, priority is given to the product specication itself. In such instances,
the instruction manual may not entirely match all the functions of the actual product.
Therefore, the actual product and packaging, as well as the name and illustration,
may differ from the manual.
The screen/LCD display shown as an example in this manual may be different from the
actual screen/LCD display.

1
1. Description
This thermostat can be used to control electric heating units such as electric
baseboards, convectors, or aeroconvectors. It keeps the temperature of a room at
the requested set point with a high degree of accuracy. This product is designed for
installations with electrical current - with a resistive load - ranging from 1.25 A to 12.5
A (120/240 VAC). It possesses a user-friendly interface. Furthermore, it gives you the
possibility to control the temperature of a room with great precision.
This thermostat is not compatible with the following installations:
• electrical current higher than 12.5 A with a resistive load (3000 W @ 240 VAC and
1500 W @ 120 VAC);
• electrical current lower than 1.25 A with a resistive load (300 W @ 240 VAC and 150
W @ 120 VAC); and
• central heating system.
Parts supplied:
• one (1) thermostat;
• wall mounting plate located at the back of the thermostat;
• two (2) mounting screws;
• two (2) solderless connectors suitable for copper wires.

2
2. Installation
Selection of the thermostat location The thermostat must be mounted on a
connection box on a wall facing the heating unit, at around 1.5 m (5 feet) above the
oor level, on a section of the wall exempt from pipes or air ducts.
Do not install the thermostat in a location where temperature measurements could
be altered. For example:
• close to a window, on an external wall, or close to a doorleading outside;
• exposed directly to the light or heat of the Sun, a lamp, a replace or any other heat
source;
• close or in front of an air outlet;
• close to concealed ducts or a chimney; and
• in a location with poor air ow (e.g. behind a door), or with frequent air drafts
conditions (e.g. head of stairs).
Thermostat mounting and connection
1. Cut off power supply on lead wires at the electrical
panel in order to avoid any risk of electric shock.
2. Ensure that the air vents of the thermostat are clean and clear of any obstruction.

3
3. Using a screwdriver, loosen the screw retaining the mounting base of the
thermostat until you feel a loose (do not completely remove the screw).
Then, remove the mounting base at the back of the thermostat by tilting it
downward, then towards you.
4. Align and secure the mounting base to the connection box using the two screws
supplied.

4
5. Take the wires from the wall through the hole at the base of the mounting base
and connect them using the supplied solderless connectors. When making
the connection with aluminum wire, make sure that you are using connectors
identied CO/ALR. Please note that the thermostat wires do not have polarity.
Therefore, the way they are connected is not important.
2-wire installation
4-wire installation

5
6. Place all the wires into the connection box.
7. Align the little slots located on the top of the thermostat
with those on the the mounting base and secure the
thermostat to the mounting base. Note that you can also
position the thermostat on the left or the right side of the
junction box (see the illustrations below). Then, tighten
the screw at the bottom of the unit.
8. Turn on the power.
9. Set the thermostat to the desired setting (see the
following section).

6
3. Operation
Powering on for the first time
When powering on for the rst time, the thermostat is initially set to Day mode .
The temperature is displayed in Celsius and is set at 21 degrees by default.
Temperature set points
The gures displayed above the pictogram indicate the temperature set point. It
can be displayed in degrees Celsius or Fahrenheit (see “Display in degrees Celsius/
Fahrenheit”).
ambient
temperature/
timer
heating power
used indicator
automatic mode
lock mode
fan mode
top button
pictograms
frost-free warning
day mode
night mode
bottom button

7
To adjust the set point, just press down the top button to increase the value, or the
bottom button to decrease it. Set points can be adjusted by increments of 0.5°C (1°F).
To quickly scroll through the set point values, press and hold down the button. The
minimum set point is 3°C (37°F), and the maximum set point is 30°C (86°F). In Day
mode, you can turn off the thermostat by lowering the set point below 3°C. The set
point value displayed will be OFF, and heating system
start up will be impossible.
Day mode and Night mode
The thermostat includes a Day mode and a Night mode , both of them having
their own independently adjustable and recorded set point. When switching from
one mode to the other, the system will automatically use the temperature set point
corresponding to the Day/Night mode selected. The standard factory set point
adjustment is 21°C (70°F) for the Day mode, and 18°C (64°F) for the Night mode.
The current Day/Night mode selection is indicated on the display by the Sun or Moon
icon. In order to manually switch from one mode to the other, simultaneously press
down the two buttons and release them immediately.

8
Night mode timer
The Night mode features a timer that automatically returns to the Day mode after
a selectable time period. This timer allows the temporary use of a temperature set
point. The standard factory adjustment of the timer is 8 hours. With this adjustment,
the thermostat automatically returns to Day mode 8 hours after being switched to
the Night mode. For example, if you want a night temperature lower than the day
temperature, both Day/Night mode set points will rst have to be set at the desired
temperatures. Before bedtime, the Night mode temperature set point will be
activated by switching manually to the Night mode. The timer is set for the duration
of the night. The thermostat will automatically return to the Day mode at the end
of the night, and the Day mode temperature set point, which is higher, will become
effective at this time.
Night mode timer adjustment procedure
1. If necessary, adjust the Day/Night mode set points at the desired temperatures. If
needed, switch from one mode to the other by simultaneously pressing down the
two buttons and releasing them immediately.
2. From the Night mode, simultaneously press down the two buttons for more than 3
seconds until the moon icon blinks.
3. If needed, adjust the timer by pressing down the top button to increase the value,
or the bottom button to decrease it. The adjustment range is from 1 hour to 999
hours. To quickly scroll through timer values, press and hold down the button.
4. When the adjustment is completed, release the buttons and wait for 5 seconds to
exit the adjustment function.

9
NOTE:
The Night mode timer will be automatically reinitialized to the latest recorded
value when switching from the Day mode to the Night mode. It is not necessary
to readjust the timer every time you switch to the Night mode. The timer is also
reinitialized when this value is adjusted. Once the timer has completed its cycle and
when the thermostat is in the Day mode, you must manually return to the Night
mode. If you want to automatically return to the Night mode, the Automatic mode
must be selected.
Automatic mode
The Automatic mode, which is associated to the Night mode timer, allows alternating
between the Day/Night modes and the two corresponding set points over a 24-hour
period. Once activated, this mode allows an automatic return to the Night mode after
24 hours. The Automatic mode allows you to dene two periods in a single day with
different set points.
For example, if the Automatic mode is activated and the Night mode timer is set at
8 hours, the thermostat will be operating in the Night mode for 8 hours at the night
temperature set point. Then, it will return to the Day mode for 16 hours operating at
the day temperature set point. At the end of the 24-hour cycle, the thermostat will
return to the Night mode, and the cycle will start over. The 24-hour cycle starts with
the Night mode as soon as the Automatic mode is activated. The Automatic mode
activation should be made when you want to return to the Night mode. The normal
course of a cycle in the Automatic mode is as follows:
1- Night mode: activated for the duration of the Night mode timer cycle. It returns to
the Day mode when the timer cycle is completed.
2- Day mode: activated for the remaining time of the 24-hour cycle. It returns to the
Night mode at the end of the 24- hour cycle.

10
Adjustment procedure of the Automatic mode
1. If necessary, adjust the Day/Night set point at the desired temperatures. If needed,
switch from one mode to the other by simultaneously pressing down the two
buttons and releasing them immediately.
2. From the Night mode, simultaneously press down the two buttons for more than
3 seconds. If needed, adjust the timer by pressing down the top button to increase
the value, or the bottom button to decrease it. The Night mode timer adjustment
range is from 1 hour to 23 hours in the Automatic mode. To quickly scroll through
the timer values, press and hold the bottom button.
NOTE:
If you set the timer to any value exceeding 23 hours, it will be impossible to
activate the Automatic mode and if it was activated, the Automatic mode will be
deactivated.
3. Activate the Automatic mode by simultaneously pressing down the two buttons
for at least 3 seconds. The Automatic mode icon will appear. If the Automatic
mode was already activated, the same procedure should be used to deactivate it.
4. When the adjustment is completed, release the buttons and wait for 5 seconds to
exit the adjustment function.

11
NOTE:
It is always possible to manually change the Day/ Night mode during a 24-hour
cycle. However, any manual return to the Night mode will re-initialize the Night
mode timer to the latest value recorded, which modies the cycle in progress. In
all cases, at the end of the 24-hour cycle, the thermostat will return to the Night
mode and start a new cycle. It is thus not necessary to readjust the Automatic
mode when a manual change is made to the Day/Night mode.
When turning back on after being powered off (because of a power failure, for
example), the automatization of the Day/Night modes is deactivated, and, if
previously activated, the pictogram that corresponds to this mode will blink. The
blinking will stop as soon as you press down a button.

12
Display in degrees Celsius/Fahrenheit
The thermostat can display the ambient temperature and the set point in degrees
Celsius (standard factory setting) or Fahrenheit.
Selection procedure for degree Celsius/Fahrenheit display (for model with backlight)
1. From the Day mode, simultaneously press down the two buttons for 8 seconds
(note that the backlight will blink after 3 seconds, but you must hold down the
buttons). The Celcius/Fahrenheit symbol will blink after 8 seconds. Release the
buttons.
2. Press down the top button to switch from the degrees Celsius to the degrees
Fahrenheit, and conversely. The degree Celsius or Fahrenheit symbol will be
displayed.
3. When the adjustment is completed, release the buttons and wait for 5 seconds to
exit the adjustment function.
Selection procedure for degree Celsius/Fahrenheit display (for model without backlight)
1. From the Day mode, simultaneously press down the two buttons for 3 seconds.
The Celsius/Fahrenheit symbol will blink after 3 seconds. Release the buttons.
2. Press down the top button to switch from the degrees Celsius to the degrees
Fahrenheit, and conversely. The degree Celsius or Fahrenheit symbol will be
displayed.
3. When the adjustment is completed, release the buttons and wait for 5 seconds to
exit the adjustment function.
Heating Power Indicator

13
The level of power used to maintain the temperature at the set point is expressed
as a percentage indicated by the number of bars in the thermometer displayed. The
heating power used is displayed as follows:
4 bars = 75% to 100%
3 bars = 50% to 75%
2 bars = 25% to 50%
1 bar = 1% to 25%
0 bar = no heat
Frost-free warning
The Snowake icon is displayed when the temperature set point is between 3°C (37°F)
and 5°C (41°F). A minimum temperature will be maintained to ensure frost control.
Lock option
It is possible to impose a maximum temperature set point by activating this mode.
Then, it becomes impossible to exceed this set point, regardless of the current mode
(Day/Night). However, it is still possible to lower the set point at your discretion.
Procedures to activate the Lock mode (for model with backlight)
1. To activate the Lock option, from the Day mode adjust the day set point to the
desired maximum temperature.

14
2. From the Day mode, simultaneously press down the two buttons for more than
13 seconds, until the Lock icon displays (note that the backlight will blink after 3
seconds and the °C or °F symbol will appear after 8 seconds, but continue to keep
both buttons pressed down).
3. Release the buttons. The thermostat is now locked.
Procedures to activate the Lock mode (for model without backlight)
1. To activate the Lock option, from the Day mode adjust the day set point to the
desired maximum temperature.
2. From the Day mode, simultaneously press down the two buttons for more than 13
seconds, until the Lock icon appears (note that the °C or °F symbol will blink after 3
seconds, but continue to keep both buttons pressed down).
3. Release the buttons. The thermostat is now locked.
Procedures to deactivate the Lock mode
1. To deactivate the Lock mode, start by cutting off the thermostat power at circuit
breaker and wait at least 20 seconds.
2. Turn the thermostat power back on and the Lock icon will blink for a maximum of
5 minutes.
3. Simultaneously press down both buttons for 13 seconds (note that the backlight
will blink after 3 seconds and the °C or °F symbol will appear after 8 seconds, but
continue to keep both buttons pressed down). After 13 seconds, the Lock icon will
disappear and the degrees symbol (C or F) will stop blinking, indicating that the
Lock mode is deactivated. Release the buttons.

15
Fan mode
The activation of the Fan mode is similar to the Celsius/ Fahrenheit adjustment.
Procedure to activate/deactivate the Fan mode (for model
with backlight)
To activate or deactivate the Fan mode, you must press down both buttons
simultaneously for 8 seconds while in Day mode.
Once the 8 seconds have passed, the Celsius/Fahrenheit symbol will blink. At this
point, release the buttons. You must then press down the bottom button to activate
or deactivate the Fan mode. The Fan symbol will turn on or off depending on the case.
Procedure to activate/deactivate the Fan mode (for model without backlight)
To activate or deactivate the Fan mode, you must press down both buttons
simultaneously for 3 seconds while in Day mode. Once the 3 seconds have passed,
the Celsius/ Fahrenheit symbol will blink. At this point, release the buttons.
You must then press down the bottom button to activate or deactivate the Fan mode.
The Fan pictogram will turn on or off depending on the case.

16
When the Fan mode is activated, the stop or minimum heating time (OFF/ON)
for a complete 10 minute cycle is established at 90 seconds (factory setting). You
can adjust it from 90 to 300 seconds. This is done to limit the amount of times the
thermostat will turn on or off. Also, if the thermostat reaches a differential superior
or inferior to the 2 degrees requested, it will shut off immediately. The deactivation
of the fan mode will cause the thermostat to go back to the heating cycle previously
programmed. Once the adjustment is nished, you can exit the adjustment mode by
not pressing any buttons for 5 seconds.
Ventilation intervals adjustment
You can adjust the minimum time between the fan startups and shutdowns. This
adjustment is similar to the fan activation procedure. First, you have to enter the fan
adjustment mode, as described in the previous section. Then, you must press down
the bottom button for 3 seconds, until the Fan icon blinks. A duration in seconds will
appear. You can adjust it from 90 (factory setting) to 300 seconds by increments of
30 seconds. Once the adjustment is done, you can exit the adjusment mode by not
pressing down any button during 5 seconds.
Parameters saving and power failures
The thermostat saves some parameters in a non-volatile memory to be able to
recover them after being shut off (a power failure, for example). These parameters
are the Day/ Night settings, the Automatic mode, the state of the Lock mode, the
maximum setting of the Lock mode, the Celsius/Fahrenheit mode, the Fan mode, the
number of minutes associated to a heating cycle, the number of hours of the night
time-switch, the number of hours remaining on the night time-switch and the current
Day/Night mode. These parameters are saved every minute if any changes are made,
except for the Day/Night mode and the remaining time left on the time-switch. These
are saved only if the automatization of the Day/Night mode had not been activated.

17
Please note that the automatization of the Day/Night modes is not automatically
reactivated when thermostat is turned on. The icon of the Automatic mode blinks
to warn the user that the mode was previously activated when thermostat was shut
off but is no longer active. Furthermore, when power is shut off, the existing Day/
Night mode is recovered only if the Automatic mode was previously deactivated. In
the opposite case, the Day mode is automatically reactivated. The Lock mode is also
reactivated if it was activated before being shut off. However, the icon will blink for
5 minutes, during which it is possible to deactivate the Lock mode by pressing down
both buttons simultaneously for 13 seconds. If this is not done, the Lock mode will
stay activated and the icon will stop blinking.
Night light (only for model with backlight)
You can activate the Night light option to permanently turn on the backlight. To
activate or deactivate this mode, the thermostat must rst be set in Day mode. Then,
simultaneously press down both buttons for 3 seconds until the backlight blinks.
Release the buttons. The night light mode will be activated (or deactivated if it was
previously activated).

18
4. Troubleshooting
NOTE:
If you are unable to resolve the problem after having veried these points, please contact our customer
service department at 1-888-725-9797.
Problem Solution
The thermostat is hot.
In normal operating conditions, the thermostat
housing can reach nearly 40°C at maximum load. That
is normal and will not affect the effective operation of
the thermostat.
Heating is always on. Check if the thermostat is properly connected. Refer
to the installation section.
Heating does not run even if the thermostat indicates
it is on.
Check if the thermostat is properly connected. Refer
to the installation section.
The display does not turn on.
Check if the thermostat is properly connected. Refer
to the installation section. Check the power supply
at the electrical panel. Check if the heating unit has a
switch. If so, ensure that this switch is turned on.
The display turns off a few minutes and then turns
on again.
The thermal protection of the heating unit has
opened due to overheating. Check if the heating
unit is in good condition of operation and that
clearance around the appliance is according to the
manufacturer’s specifications.
The display has low contrast when heating is on.
The load is lower than the minimum load. Install
a heating unit that is within the load limits of the
thermostat.
The displayed ambient temperature is incorrect. Check the presence of an air stream or a heat source
near the thermostat, and correct the situation.
The display indicates
E1 or E2. Faulty thermal sensor. Contact the customer service.
Weak luminosity of
the display.
Possibility of a bad contact. Check thermostat wirings.
Refer to the installation section.