Emerson Process Management 1F95-1291 specifications Emergency Mode, Cooling/Dehumidifier

Emergency Mode

Applies only to Heat Pump Systems

Emergency Heat (System EM Position) bypasses the Heat Pump to use the heat source wired to terminal W/E, W2 on the thermostat. EM is typically used when compressor opera- tion is not desired, or you prefer back-up heat only.

1.Press SYSTEM key to select EM. “EM Heat Mode” will flash on the display.

2.Press to adjust thermostat setting above room tem- perature. The Emergency heating system will begin to operate. The display will show “System On” flashing “EM Heat Mode” and “Heat” to indicate that the Emergency sys- tem is operating.

3.Adjust temperature setting to 3° above room temperature. Any additional stages of auxiliary heat should begin to operate and the display will show "System On +2".

4.Press to adjust the thermostat below room tempera- ture. The heating system should stop operating.

!CAUTION

To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

Cooling/Dehumidifier

1.Press SYSTEM to select "Cool".

2.Press to adjust the thermostat setting below room tem- perature. The blower should come on immediately on high speed, followed by cold air circulation. The display should show "System On". If the setpoint temperature display is flashing, the compressor lockout feature is operating (see Configuration menu, item 11).

3.Adjust temperature setting to 3° below room temperature. The second stage cooling should begin to operate and the display should show "System On +2".

4.Press to adjust the temperature setting above room temperature. The cooling system should stop operating.

To check the dehumidifier when System On appears and the cooling system is running press HUMIDITY* button once. Press to adjust the humidity 2% or more below the room humidity level setpoint range. DeHum On will appear indicat- ing it is calling for the dehumidification.

If the room humidity is lower than the adjustment range, press

to 40% and hold it for four seconds. This will force the De- Hum On for one complete cooling cycle to test the dehumidi- fication equipment.

After adjusting the humidity setting the display will return to temperature in approximately 10 seconds. To switch the dis- play back to temperature immediately after adjusting humidity setting press HUMIDITY again.

*Note: If Auto Schedule is displayed instead of Humidity, Auto Schedule must be turned off in the Configuration Menu.

Choose the Fan Setting (Auto or On)

Fan Auto is the most commonly selected setting and runs the fan only when the heating or cooling system is on.

OPERATING YOUR THERMOSTAT

Fan On selection runs the fan continuously for increased air circulation or to allow additional air cleaning.

Tip: Running the fan more frequently will increase your energy consumption. Most systems use a 1/2 or 1/3 HP electric motor to power the fan.

Choose the System Setting

(Cool, Off, Heat, Em, Auto)

Press the SYSTEM key to select:

Cool: Thermostat controls only the cooling system.

Off: Heating and Cooling systems are off.

Heat: Thermostat controls only the heating system.

Em: Setting is available only when the thermostat is config- ured in HP1 or HP2 mode.

Auto: Auto Changeover is used in areas where both heating and cooling may be required on the same day. AUTO allows the thermostat to automatically select heating or cooling depending on the indoor temperature and the selected heat and cool temperatures. When using AUTO, be sure to set the Cooling temperatures more than 1° Fahrenheit higher than the heating temperature.

Manual Operation for

Non-Programmable Mode

Press the SYSTEM key to select "Heat" or "Cool" and use the keys to adjust the temperature to your desired setting. After selecting your desired settings you can also press the SYSTEM key to select AUTO to allow the thermostat to auto- matically change between "Heat" and "Cool".

Manual Operation (Bypassing the Program)

Programmable Mode

Manual operation will bypass the program and allow you to adjust the temperature as you desire. The temperature you set in Hold will be maintained indefinitely. Press or to adjust the temperature. The HOLD key will appear. Press the HOLD key. "Hold At" will appear next to the setpoint tem- perature and the thermostat will maintain the new setpoint temperature until Run Schedule is pressed to resume pro- gram operation.

Program Override (Temporary Override)

Press or keys to adjust the temperature. This will over- ride the temperature setting for a (default) four hour override period. The override period can be shortened by pressing or lengthened by pressing . Program Override period can range from 15 minutes to 7 days.

Example: If you turn up the heat during the morning program, it will be automatically lowered later, when the temporary hold period ends. To cancel the temporary setting at any time and return to the program, press Run Schedule.

If the SYSTEM key is pressed to select AUTO the thermostat will change to "Heat" or "Cool", whichever ran last. If it switches to "Heat", but you want "Cool", or it changes to "Cool", but you want "Heat", press both keys simultaneously to change to the other mode.

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