Emerson 1F75H-21NP - Non-Programmable Heat Pump Thermostat Manual

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

THERMOSTAT INSTALLATION

WIRING

Refer to 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.

*Cut W2/E jumper when separate heat sources are used for W2 and E.

For Dual Fuel Heat Pump applications, be sure to turn on the Duel Fuel Logic option (found in the Installer's Menu)

Precautions

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.

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.

Installer's Menu # (Hold Menu 3 Seconds)	Description	Default Setting (flashing icons)	Settings (Press or )
30	Heat Cycle Rate (how often the heat will turn on)	MEd	SLO – slow MEd – medium FAS – fast
32	Aux Cycle Rate (how often the auxiliary heat will turn on)	MEd	SLO – slow MEd – medium FAS – fast
35	Cool Cycle Rate (how often the cooling will turn on)	MEd	SLO – slow MEd – medium FAS – fast
50	Compressor Lockout (protects the compressor from short cycling)	OFF	On – 5 minute delay OFF – no delay
60	Duel Fuel Logic (turn On when using gas as the auxiliary heat source)	OFF	On- gas auxiliary heat OFF- electric auxiliary heat
65	Maximum Heat Limit (maximum set point for heat mode)	99	47 to 99
66	Minimum Cool Limit (minimum set point for cool mode)	45	45 to 97
Installer's Menu # (Hold Menu 8 Seconds)	Description	Default Setting (flashing icons)	Settings (Press or )
79	Fahrenheit or Celsius	°F	°F – Fahrenheit °C – Celsius
81	Temperature Display Adjustment (adjust the displayed "Room Temperature")	0	-5 to +5
83	Continuous Display Light (keep the backlight always on – "C" wire required)	OFF	On – always on OFF – momentarily

TEST EQUIPMENT

Turn on power to the system.

Fan Operation

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

Heating System

1. Move System Switch to Heat position. If the auxiliary heating system has a standing pilot, be sure to light it.
2. Press to adjust thermostat setting to 1° above room temperature. The heat pump system should begin to operate and the thermostat will indicate Heat On.
3. Press to adjust thermostat setting to 3° above room temperature. The auxiliary heat should begin to operate and the thermostat will indicate Heat On Auxiliary.
4. Press to adjust thermostat setting 1° below room temperature. The heating system should stop operating and the thermostat should indicate Heat.

Auxiliary System

1. Move System Switch to Aux position. If the auxiliary heating system has a standing pilot, be sure to light it.
2. Press to adjust thermostat setting to 1° above room temperature. The auxiliary heating system should begin to operate and the thermostat will indicate Heat On Auxiliary.
3. Press to adjust thermostat setting 1° below room temperature. The auxiliary heating system should stop operating and the thermostat should indicate Heat Auxiliary.

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. 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)

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.

Whenever " " 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 " " is displayed, install new batteries before leaving.

TROUBLESHOOTING

Resetting the Thermostat or Thermostat Settings

If the thermostat has good batteries, but has a blank display or does not respond to key presses, the thermostat should be reset by removing the batteries for 2 minutes. This reset will not change the menu settings. If the condition persists after reinstalling the batteries, replace the thermostat.

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 timeand hold until the display goes blank and resets.

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

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