Single-Stage Thermostat Install Guide Model # NP110 Made in China 37-7581B
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...........................................
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. THERMOSTAT DETAILS The thermostat buttons and switches 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 8 8 8 8 9 9 9 9 4 10 (Up arrow) Raises temperature setting. (Down arrow) Lowers temperature setting. 1 1 FAN switch (ON, AUTO). 2 2 SYSTEM switch (COOL, OFF, HEAT).
3. REMOVING OLD THERMOSTAT 3.1 Turn off power or ! WARNING 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. 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.
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. ! CAUTION 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. 3.
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) 7
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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.
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.
4.3 Set switch and advanced wiring W904 Jumper Electric / Gas switch 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.
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.techsupport@emerson.
5.1 Fan operation If your system does not have a G terminal 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.
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.
5.4 The thermostat buttons and switches 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 8 8 8 8 9 9 9 9 10 10 10 10 (Up arrow) Raises temperature setting. (Down arrow) Lowers temperature setting. 1 1 FAN switch (ON, AUTO). 2 2 SYSTEM switch (COOL, OFF, HEAT).
2 3 The display 5.5 1 4 1 2 1 5 2 3 2 6 3 4 3 7 4 5 4 8 5 6 is displayed when the SYSTEM switch is in the HEAT position. is displayed (non-flashing) when the SYSTEM switch is in the COOL position. is displayed (flashing) when the compressor is in lockout mode. Displays current temperature. 5 9 6 7 6 10 7 8 be replaced. Nothing else will be displayed.
3 1 4 2 5 3 6 4 7 5 1 6 2 7 3 1 8 4 2 9 5 3 10 6 4 11 7 5 12 8 6 13 9 7 8 9 10 11 12 13 14 15 17
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.
• 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.
6. THERMOSTAT SPECIFICATIONS ELECTRICAL DATA THERMAL DATA Electrical Rating: Setpoint Temperature Range: 45°F to 90°F (7°C to 32°C) 0 to 30 VAC 50/60 Hz. or D.C. 0.05 to 1.0 Amps (Load per terminal) 1.
7. TROUBLESHOOTING Reset Operation If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat by pressing and at the same time while moving the SYSTEM switch from OFF to HEAT. This also resets the factory defaults. If the thermostat has power, has been reset and still does not function correctly contact your heating/cooling service person or place of purchase.
Symptom Possible Cause Corrective Action No Heat/No Cool/No Fan (common problems) 1. Blown fuse or tripped circuit breaker. Replace fuse or reset breaker. 2. Furnace power switch to OFF. Turn switch to ON. 3. Furnace blower compartment door or panel loose or not properly installed. Replace door panel in proper position to engage safety interlock or door switch. 1. SYSTEM Switch not set to Cool. Set SYSTEM Switch to COOL and lower setpoint temperature below room temperature. No Cool 2.
Symptom Possible Cause Corrective Action No Heat 1. Pilot light not lit. Re-light pilot. 2. SYSTEM Switch not set to HEAT. Set SYSTEM Switch to HEAT and raise setpoint temperature above room temperature. 3. Loose connection to thermostat or system. 4. Furnace Lock-Out Condition. Heat may also be intermittent. 5. Heating system requires service or thermostat requires replacement.. Verify thermostat and system wires are securely attached.
Symptom Possible Cause Corrective Action Heat, Cool or Fan Runs Constantly. 1. Possible short in wiring. Check each wire connection to verify they are not shorted or touching together. No bare wire should stick out from under terminal screws. Try resetting the thermostat as described above. If the condition persists the manufacturer of your system or service person can instruct you on how to test the Heat/ Cool system for correct operation. If the system operates correctly, replace the thermostat. 2.
Symptom Possible Cause Corrective Action Cooling Cycles Too Fast or Too Slow (narrow or wide temperature swing) 1. The location of the thermostat and the size of the Cooling System can influence the cycle rate. The cycle rate for cooling is fixed and can not be adjusted. Contact a local service person for suggestions. Thermostat Setting and Thermostat Thermometer Disagree 1. Thermostat thermometer setting requires adjustment. The thermometer can be adjusted +/- 3 degrees.
CONTACT US Customer support: 877.654.9394 or wr.techsupport@emerson.
MERCURY NOTICE This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury must not be discarded in household trash. Refer to thermostat-recycle.org for location to send product containing mercury. FOR CALIFORNIA RESIDENTS Warning: This product contains a chemical known to the state of California to cause cancer and birth defects and other reproductive harm.
