Emerson 1F75P-21NP Non-Programmable Thermostat Installation and Operating Instruction

Emerson 1F75P-21NP Non-Programmable Thermostat

INDEX

Thermostat Installation	2-4
Wiring	2
Installer Menu	3-4
Using the Thermostat	5
Thermostat Overview	5
Troubleshooting	6-7
Homeowner Help Line	8

Thermostat Applications	Maximum Stages Heat /Cool
Single Stage Compressor, Heat Pump Systems (air source or geothermal) – 1 Stage Aux/Emergency Heat	2/1

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 www.thermostat-recycle.org for information on disposing of products containing mercury.

SPECIFICATIONS

Electrical Rating:

• Battery Power……………………………….. 20 to 30 VAC, NEC Class II, 50/60 Hz
• Input-Hardwire………………………………. 20 to 30 VAC, NEC Class II, 50/60 Hz
• Terminal Load……………………………………. 1.5 A per terminal, 2.5A maximum all terminals combined
• Setpoint Range………………………………….. 45° to 99° F (7° to 37° C)

Rated Differentials (@ 6°F/ Hr):Fast Med Slow

• Heat Pump (Heat)………………………….. 0.9°F 1.2°F 1.7°F
• Heat Pump (Cool)…………………………… 0.9°F 1.2°F 1.7°F
• Auxiliary Heat………………………………… 0.5°F 0.75°F 1.9°F
• Operating Ambient…………………………….. 32°F to +105°F (0° to +41°C)
• Display Temperature Range…………………… 32°F to +99°F (0 to 37°C)
• Operating Humidity……………………………. 90% non-condensing maximum
• Shipping Temperature Range……………….. -20°F to + 150°F (-29° to +65°C)
• Thermostat Dimensions………………………. 3-3/4” H x 6” W x 1-1/8” D

THERMOSTAT INSTALLATION

WIRING
Refer to the equipment manufacturer’s instructions for specific system wiring information. After wiring, see INSTALLER MENU for proper thermostat configuration. Wiring table shown are for typical systems and describe the thermostat terminal functions.

Terminal Designations	Terminal Function
GL	Low Speed Fan Relay
R	Power (24V)
O/B	Changeover Terminal-Energized in Cool (O) or Heat (B) for Heat Pump.
Y	Heat and Cool Mode 1st Stage Compressor
GH	High Speed Fan Relay
W	Heat Mode – 2nd stage (Electric)
C	Common wire for 24V

When both RC and RH wires are present, cut RC/RH jumper (see next page).

• For heat pump systems, add a jumper wire to connect terminals Y and W

Precautions

• Do not exceed the specification ratings.
• All wiring must conform to local and national electrical codes and ordinances.
• This control is a precision instrument, and should be handled carefully. Rough handing or distorting components could cause the control to malfunction.

WARNING

• Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard.
• Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will burn out thermostat and could cause personal injury and/or property damage.

CAUTION 
To prevent electrical shock and/or equipment damage, disconnect electrical power to system, at main fuse or circuit breaker box,until installation is complete.

1. W2/E Jumper Wire
   This thermostat electrically connect the W2 and E terminals so that you do not need to do this with a jumper wire. If your system has separate W2 and E wires, clip the W2/E jumper located on the back of the thermostat. This will isolate both terminals so they can be used independently.
2. O/B Terminal Switch
   The O/B switch on this thermostat is factory set to the O position. This will accommodate the majority of heat pump applications, which require the changeover relay to be energized in Cool. If the heat pump being installed requires a B terminal to energize the changeover relay in Heat, the O/B switch must be moved to the B position.

INSTALLER MENU

To access the INSTALLER’S MENU set the system switch to the OFF position and then press and hold the temperature  buttons for 3 seconds. The display will show item 30 in the table below. Use the temperature  buttons by pressing them simultaneously to navigate through menu items. Press or to change a menu setting.

TEST EQUIPMENT

Turn on power to the system.

Fan Operation
If your system does not have a G terminal connection, skip to Heating System.

1. Move fan switch to On position. The blower should begin to operate.
2. Move fan switch to Auto position. The blower should stop immediately.

Heating System

1. Move System Switch to Heat position.
2. Press to adjust thermostat setting to 1° above room temperature. The system should begin to operate and the thermostat will indicate Heat On.
3. Pressto adjust thermostat setting 1° below room temperature. The heating system should stop operating and the thermostat should indicate Heat.

Cooling System

1. Move System Switch to Cool position.
2. Press to adjust thermostat setting 1° below room temperature. The blower should come on immediately on high speed, followed by cold air circulation. The thermostat will indicate Cool On. There can be up to a 5 minute delay. (see INSTALLER MENU, item 50) 3.)
3. Press to adjust thermostat setting to 1° above room temperature. The cooling system should stop operating and the thermostat will indicate Cool.
   Note: If Starting Soon is shown on the display, the compressor lockout feature is operating. There will be up to a 5 minute delay before the compressor turns on.(see INSTALLER MENU, item 50)

CAUTION

• To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
• Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.

USING THE THERMOSTAT

THERMOSTAT OVERVIEW
Before you begin using your thermostat, you should be familiar with its features, display and the location/operation of the thermostat buttons and switches.

THERMOSTAT BUTTONS AND SWITCHES	THE DISPLAY
1.) Fan Switch	5.) Thermostat is protecting the equipment from short cycling (5-minute delay)
2.) System Switch	6.) Indicates that the system is running in cool, heat or auxiliary mode (The auxiliary will run in Heat mode when the heat pump cannot maintain the set temperature.)
3.) Raises Temperature Setting	7.) Temperature setpoint
4.) Lowers Temperature Setting	8.) Displays when the thermostat setpoint has reached the maximum or minimum setting.
	9.) Room Temperature
	10.) SEE TROUBLESHOOTING

Whenever “ Replace ” appears in the display, new premium brand AA alkaline batteries should be installed. If the house will be unoccupied for an extended period and either “” or “  Replace ” is displayed, install new batteries before leaving.

TROUBLESHOOTING

Symptom	Possible Cause	Corrective Action
No Heat/ No Cool/ No Fan (common problem)	1.) Blown fuse or tripped circuit breaker 2.) Furnace power switch to OFF 3.) Furnace blower compartment door panel loose or not properly installed 4.) Loose connection to thermostat or system	1.) Replace fuse or reset breaker   2.) Turn switch to ON 3.) Replace door panel in proper position to engage safety interlock or door switch   4.) Tighten Connections
No Heat / No First Stage Heat	1.) System Switch not set to Heat 2.) Loose connection to thermostat or system 3.) Heating System requires service or thermostat requires replacement 4.) Misconfiguration between menu item 20 and jumper wire 5.) O/B Switch set incorrectly	Verify thermostat and system wires are securely attached. Diagnostic: Set System Switch to Heat and raise the setpoint above room temperature. Within five minutes the thermostat should make a soft click sound and “Heat On” should appear on display. This sound indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed after this charting. If the thermostat does not click after being reset, contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating system is operating correctly. Make sure that menu item 20 and the jumper wire match.
No Cool	1.) System Switch not set to Cool 2.) Loose connection to thermostat or system 3.) Cooling System requires service or thermostat requires replacement 4.) O/B Switch set incorrectly	Verify thermostat and system wires are securely attached. Diagnostic: Set System Switch to Cool and lower setpoint below room temperature. Same procedures as diagnostic for “No Heat” condition except set the thermostat to Cool and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling if the compressor lock-out option is selected in the installer menu. (see INSTALLER MENU, item 50)
Heat, Cool or Fan Runs Constantly	Possible short in wiring, thermostat, heat, cool or fan system	Check each wire connection to verify they are not shorted or touching other wires. Try resetting the thermostat. If the condition persists contact your HVAC service person.
Thermostat Display & Thermometer Disagree	Thermostat display requires adjustment	Display can be adjusted +/-5°. See User Menu item 04

Symptom	Possible Cause	Corrective Action
Furnace (Air Conditioner) Cycles Too Fast or Slow (narrow or wide temperature swing) / No First Stage Heat	The location of the thermostat and/or the size of the Heating System may be influencing the cycle rate	Digital thermostats provide precise control and cycle faster than older mechanical models. The system turns on and off more frequently, but runs for a shorter time. If you would like to increase cycle time, choose SLO for slow cycle in the Installer menu. (Reference menu items 30 & 35) If an acceptable cycle rate is not achieved, contact your HVAC service person.
“Call for Service” icon appears on displayed	1.) Heating system is not able to heat the space to within 10 degrees of the setpoint within 2 hours 2.) Cooling system is not able to cool the space to within 10 degrees of the setpoint within 2 hours 3.) If “–” is displayed for the Room Temperature, a replacement thermostat is needed 4.) None of the buttons operate on the thermostat 5.) If “Call for Service” is flashing, compressor self diagnostic is detecting an issue with the outdoor unit	1.) See corrective action for “No Heat” 2.) See corrective action for “No Cool” 3.) Replace thermostat 4.) Check for a stuck button   5.) Contact a service person to verify the equipment is operating correctly

Resetting the Thermostat or Thermostat Settings
To conveniently reset only the user settings back to factory defaults, press the temperature and buttons and move the system switch from OFF to HEAT at the same time and hold until the display goes blank and resets.

WARNING: This product contains a chemical known to the state of California to cause cancer and birth defects and other reproductive harm.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, under part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used following the instructions, may cause harmful interference to radio communications. However, there is no gurantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
• Consult the dealer or an experienced radio/TV technician for help
  CAN ICES-003 (B) / NMB-003 (B)

TECHNICAL SUPPORT: 1-888-725-9797

Reference

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Emerson 1F75P-21NP Non-Programmable Thermostat Installation and Operating Instruction

Emerson 1F75P-21NP Non-Programmable Thermostat Installation and Operating Instruction