White Rodgers NP110 User manual

Model # NP110
Made in China
Single-Stage Thermostat
37-7581
Install Guide

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GUIDE CONTENTS
Preparations ................................................. 3
Thermostat details........................................ 4
Removal of your old thermostat.................... 5
Mounting and wiring your new thermostat.. 10
Checking thermostat operation................... 12
Specifications ............................................. 20
Troubleshooting.......................................... 21
Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury
and/or property damage.
WARNING
!

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1. PREPARATIONS
1.1 Check package contents
This package should contain the following items:
• Thermostat
• Mounting screws and wall anchors (x2)
• 2 AAA batteries
• Terminal wire label stickers
• Installation instructions
1.2 Gather tools
Required tools:
□ Flat-head Screwdriver □ Small pliers (needle-nose) □ Drill with 3/16” (4 mm) bit
Optional tools:
□ Wire cutters/stripper □ Hammer

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2. THERMOSTAT DETAILS
The thermostat buttons and switches
(Up arrow) Raises temperature setting.
(Down arrow) Lowers temperature setting.
FAN switch (ON, AUTO).
SYSTEM switch (COOL, OFF, HEAT).
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Fan
On Auto Cool Off Heat
System

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3. REMOVING OLD THERMOSTAT
3.1 Turn off power
To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker box, or by flipping
a switch at the air handler. Do not restore power until installation is complete.
WARNING
!
To ensure the power to your heating and cooling system has been turned off, try to turn on heating or cooling by
changing the temperature on your old thermostat.
or

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3.2 Remove the old thermostat cover
Remove the old thermostat’s front cover from the wall base. Some covers pull off easily, while others may need to
be released by using a screwdriver.
3.3 Label wires
Tip: Taking a picture with a camera or smartphone can help you not only remember how wires are connected
to the terminals, but can also ensure that you label your wires correctly. Mislabeling the wires may result in a
high energy bill or damage to your heating and cooling system.
Your old thermostat may have a sealed glass tube containing mercury. Be careful not to damage the tube or dispose of the tube in your trash. For safe
disposal information, please see Mercury Notice on page 27.
CAUTION
!
Using your screwdriver, carefully unscrew one wire at a time from the terminal block and attach the corresponding
wire label sticker.
Please note that not all terminals may be used, and that there’s no standard color code for thermostat wires, so your
wire colors may vary. For your reference, we’ve included a terminal label reference chart to help you connect the
wires in your old thermostat to your new thermostat in case you get stuck.

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Terminal labeling reference chart
If your current terminal has
the following letter
Label the wires with the
following letters Terminal function
RH, R, R5, 5 RH 24V Power (Heating)
RC RC 24V Power (Cooling)
W, W1, 4 W Heating Relay
Y, Y1 Y Cooling Relay
G G Fan Relay
O O Reversing Valve (for heat pump applications
energized in Cool mode)
B B Reversing Valve (for heat pump applications
energized in Heat mode)

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3.4 Identify jumper wire
For terminal RC and RH:
On your old thermostat, if… Then, on your new thermostat…
Terminal RC and RH are connected
with a jumper wire Leave the jumper wire in its place
There’s only one R wire (RC, RH, R or R5)
coming out of the wall Leave the jumper wire in its place
Terminal RC and RH (or 5 or R5) are NOT
connected by a jumper wire Remove the jumper wire between RC and RH
For terminal Y and W:
If you have a heat pump with reversing valve, connect Y and W with a jumper wire on your new thermostat.
If you need help with labeling and wiring, please contact Customer Support at 877.654.9394 or email
wr[email protected] — we’re here to help!

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3.5 Remove old thermostat base
With all of your wires disconnected and properly labeled, you may now safely remove the thermostat base from
your wall.
Tip: Worried about having your wires falling into your wall? Keep the wires secure by wrapping the them
around a pencil.

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4. MOUNTING AND WIRING YOUR NEW THERMOSTAT
4.1 Install new thermostat base
Mount your new thermostat base using the supplied screws. Drill holes and insert wall anchors to secure the
thermostat base to the wall, if necessary.
4.2 Connect wires to corresponding terminal blocks
Match each labeled wire to it’s corresponding terminal on the mounted thermostat base. Insert each labeled wire into
the hole of it’s matching terminal, and using the screwdriver, tighten the screw on the terminal block securely.
Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage
may occur.
CAUTION
!

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4.3 Set switch and advanced wiring
If you have either a gas or oil furnace, set the switch to GAS. If you have an electric furnace, set the switch to ELEC.
Electric / Gas
switch
W904 Jumper

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4.4 Install the batteries and attach front cover
Install the included AAA alkaline batteries and push the front cover on to the thermostat base until it’s secure.
4.5 Turn on power
Turn on your power at the source.
Congratulations! You’ve completed the thermostat installation process
5. CHECK THERMOSTAT OPERATION
Tip: If at any time during testing your system does not operate properly, please contact Customer Support at
877.654.9394 or email wr[email protected]
If at any time during testing your system does not operate properly, contact a qualied service person.
Note: To prevent static discharge problems, touch side of thermostat to release static build-up before touching
any keys.

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5.1 Fan operation
If your system does not have a Gterminal connection, skip to Heating System.
1. Turn on the power system
2. Move FAN switch to ON position. The blower should begin to operate.
3. Move FAN switch to AUTO position. The blower should stop immediately.
5.2 Cooling system
This thermostat has a time delay between cooling cycles to allow the head pressure in the compressor to stabilize.
If the temperature is adjusted to call for cool within 5 minutes of the last cycle the snowflake icon will blink indicating
the thermostat is locked out. After 3 to 5 minutes, the compressor will start and the snowflake icon will stop flashing.
This helps prevent the compressor from cycling too quickly and is normal operation for the thermostat.
To prevent compressor and/or property damage, if the outdoor temperature is below 50°, DO NOT operate the cooling system
CAUTION
!

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1. Mose SYSTEM switch to COOL position.
2. Press to adjust thermostat setting below room temperature. The blower should come on immediately on high
speed, followed by bold air circulation
3. Press  to adjust temperature setting above room temperature. The cooling system should stop operating.
5.3 Heating system
1. Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.
2. Press to adjust thermostat setting room temperature. The heating system should begin to operate.
3. Press to adjust temperature setting below room temperature. The heating system should stop operating.
Before you begin using your thermostat, you should be familiar with its features and with the display and the location
and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base.
To remove the cover, gently pull it straight out from the base. To replace the cover, line up the cover with the base
and press gently until the cover snaps onto the base.

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5.4 The thermostat buttons and switches
(Up arrow) Raises temperature setting.
(Down arrow) Lowers temperature setting.
FAN switch (ON, AUTO).
SYSTEM switch (COOL, OFF, HEAT).
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Fan
On Auto Cool Off Heat
System

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5.5 The display
is displayed when the SYSTEM switch is in the HEAT position. is
displayed (non-ashing) when the SYSTEM switch is in the COOL position.
is displayed (ashing) when the compressor is in lockout mode.
Displays current temperature.
is displayed when the 2 “AAA” batteries are low and should
be replaced. Nothing else will be displayed.
Displays currently set temperature (this is blank when
SYSTEM switch is in the OFF position).
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5.6 Operating features
Now that you are familiar with the thermostat buttons and display, read the following information to learn about the
many features of the thermostat.
• SIMULTANEOUS HEATING/COOLING SETPOINT STORAGE — You can enter both your heating and cooling
setpoints at the same time. There is no need to re-enter the thermostat at the beginning of each season.
• TEMPERATURE SETTING — Press or until the display shows the temperature you want.
The thermostat will keep the room temperature at the selected temperature.
• °F/°C CONVERTIBILITY — The factory default setting is Fahrenheit. Clipping W904 jumper on the circuit board
will alter this feature to Celsius temperature setting. See diagram on page 11.
• LOW BATTERY INDICATOR — If the 2 “AAA” alkaline batteries are low and should be replaced, the display will
be blank except for . When the batteries are low, pressing any button will cause the display
to operate for ten seconds. After ten seconds, the display will be blank except for . After
has been displayed for 4 weeks, the thermostat will raise the temperature 10° above your
setpoint in COOL mode and drop the temperature 10° below your setpoint in HEAT mode. You cannot program
with low batteries, but you can override setpoint temperature.

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• TEMPERATURE DISPLAY ADJUSTMENT — Your new thermostat has been accurately set in our factory.
However, if you wish, you may adjust your new thermostat temperature display to match your old thermostat.
This can be accomplished (within a ±3° range) as follows:
1. Press or at the same time for two seconds with the SYSTEM switch in OFF position.
2. Press or to adjust the displayed temperature to your desired setting.
3. Move SYSTEM switch from OFF to exit the feature.
• DISPLAY BACKLIGHT — (Not available on earlier models.) The display backlight improves display contrast in
low lighting conditions. Selecting backlight ON will turn the light on for a short period of time after any button is
pressed. Selecting backlight OFF (default) will keep the light off. Turn the display backlight feature ON as follows:
1. Press and at the same time for two seconds with the SYSTEM switch in HEAT position.
The display will alternately show “-L” AND “FF” (off).
2. Press or to change “FF” to “ON”.
3. Move SYSTEM switch to OFF to exit the feature.

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6. THERMOSTAT SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
0 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)
THERMAL DATA
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature Range:
32°F to 105°F (0°C to 41°C)
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature Range:
-40°F to 150°F (-40°C to 66°C)