Emerson Process Management 1F95-1291 Operating Your Thermostat, Check Thermostat Operation

INSTALLER/CONFIGURATION MENU

“HM” terminal) if the actual humidity is below the humid- ity set point. The display indicates AH. Pressing the key will cycle the display from OFF to H (feature enabled in Heat mode) to C (feature enabled in Cool mode) to A (feature enabled to Auto mode) and back to OFF.

42.Cycle Humidifier (CH) – This feature provides an op- tion that reduces the water usage by up to 50% when a flow-through humidifier is controlled by the thermostat. It is recommended for use on flow-through humidifiers only.

The display indicates CH (Cycle Humidifier) with the de-

fault indicating OFF. Pressing the or keys will toggle the display from OFF to On and back to OFF. When CH is enabled, the humidifier will cycle to turn off for 10 minutes after it has run for 10 minutes. The blower and/or furnace will continue to run during the humidifier off period.

43.Programmable Dehumidification Optimal Comfort Mode (OC) or Optimal Dehumidification (Od) – This item can be selected to OC (Optimal Comfort mode), Od (Optimal Dehumidification), or OFF. When Optimal Com- fort (OC) is enabled, this feature automatically reduces indoor humidity with a call for Cooling if humidity is 2% above humidity setpoint. Humidity is set by pressing the Humidity key when in the appropriate mode, in this case Cooling, and pressing the or keys to set desired humidity (range 40% to 95%) level followed by pressing Humidity key again. This dehumidification feature uses less energy by maintaining temperature and dehumidify- ing only when a call for Cooling is required. Optimal De- humidification (Od) when enabled, this feature automati- cally reduces indoor humidity with a call for Cooling if humidity is 2% above setting. Humidity is set by pressing the HUMIDITY key when in the appropriate mode, in this case Cooling, and pressing the or keys to set desired humidity level followed by pressing Humidity key

again. This dehumidification feature may use more energy by making dehumidification a priority initiating a call for cooling if humidity is 2% above desired setting. This feature may also over-cool the condition space by up to 3 degrees to achieve the desired humidity level. (Note: Both dehumidification modes operate in Cooling mode only with a call for cooling)

44 & 45. Change UV Lamp – This feature allows the thermo- stat to display the words "Change UV Lamp" (Call for Service of UV bulb) after a set time of UV bulb operation. This is a reminder to maintain your UV system at opti- mum level of operation. When enabled, the factory set interval for "Change UV Lamp" to be displayed is 350 days of UV bulb operation and can be adjusted in 25 day increments. This should be adjusted with respect to the bulb’s recommended maintenance schedule.

When "Change UV Lamp" is displayed, you can clear it by pressing Clean Display.

46 & 47. Change Humidifier Pad – This feature allows the thermostat to display the words "Change Pad" after a set time of humidifier operation. This is a reminder to main- tain or clean your humidifier. The factory set interval for "Change Pad" to be displayed is 100 hours of humidifier operation. This should be adjusted with respect to the humidifier’s recommended maintenance schedule.

When "Change Pad" is displayed, you can clear it by pressing Clean Display.

48 & 49. Select Change Filter Run Time – This feature allows thermostat to display "Change Filter" after a set time of blower operation. This is a reminder to change or clean your air filter. This time can be set from 25 to 1975 hours in 25 hour increments. A selection of OFF will cancel this feature. When "Change Filter" is displayed, you can clear it by pressing Clean Display. In a typical ap- plication, 200 hours of run time is approximately 30 days.

OPERATING YOUR THERMOSTAT

Check Thermostat Operation

NOTE

To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys.

If at any time during testing your system does not operate properly, contact a qualified service person.

Fan Operation

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

Heating System.

1.Turn on power to system.

2.Press fan key to ON position. The blower should begin to operate.

3.Press fan key to AUTO position. The blower should stop immediately.

!CAUTION

Do not allow the compressor to run unless the compres- sor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.

Heating/Humidifier

1.Press SYSTEM key to select HEAT. If the auxiliary heating system has a standing pilot, be sure to light it.

2.Press to adjust thermostat setting to 1° above the room temperature. The heat pump system should begin to operate. The display should show "System On". How- ever, if the system configuration is set to HP1 or HP2 and setpoint temperature display is flashing, the 5 minute compressor lockout feature is operating (see Configura- tion menu, item 11).

3.Adjust temperature setting to 3° above room temperature. If your system configuration is set at MS2, HP1 or HP2, the auxiliary heat system 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.

To check the humidifier when System On appears and the heating system is running press the HUMIDITY* button once. Press to adjust the humidity 2% or more above the room humidity level setpoint range. (Humidity setpoint can be adjusted from 5 to 50%.) Hum On will appear indicating it is calling for the humidifier.

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

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