American Standard ACONT302 Touchscreen Thermostat Installation Guide

American Standard ACONT302 Touchscreen Thermostat 

Safety

WARNING
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.
This information is intended for use by individuals possessing adequate backgrounds of electrical, mechanical, HVAC and experience. Any attempt to repair an HVAC system may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and troubleshooting of this product, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.

CAUTION
To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit breaker box until installation is complete.
ATTENTION: 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. Do not touch any spilled mercury. Wearing nonabsorbent gloves, clean up any spilled mercury and place in a sealed container. For proper disposal of a product containing mercury or a sealed container of spilled mercury, place it in a suitable shipping container. Refer to www.thermostat-recycle.org for location to send the product containing mercury.
NOTE: Use 18-gauge color-coded thermostat cable for proper wiring. Shielded cable is not typically required.
Keep this wiring at least one foot away from large inductive loads such as Electronic Air Cleaners, motors, line starters, lighting ballasts and large distribution panels. Failure to follow these wiring practices may introduce electrical interference (noise) which can cause erratic system operation.
All unused thermostat wire to be grounded at indoor unit chassis ground only. Shielded cable may be required if the above wiring guidelines cannot be met. Ground only one end of the shield to the system chassis.

Product Specifications

SPECIFICATION	DESCRIPTION
Product Models	ACONT302 and 303
Products	302/303
Size	4-9/16” x 5-13/16” x 1-3/16” (HxWxD)
Configurations	Heat Pump, Heat/Cool, Dual Fuel, Heat Only, Cooling Only
Maximum Number of Stages	4 Stages Heat, 2 Stages Cooling
Operating Temperature	32°F to 105°F (0 to +41°C) / 90% RH Non Condensing
Shipping Temperature Range	-40 to 150°F (-90 to +65°C)
Input Power (DC)	Two 1.5V AA Alkaline
Input Power (AC)	20-30 VACm NEC Class 11m 50/60 HZ
Terminal Load	1.5A per Terminal, 2.5A Maximum, all Terminals Combined
Wire Usage	18 AWG
System Modes	Auto, Heating, Cooling, Off, Emergency Heat
Fan Modes	Auto, On, Program
Setpoint Temperature Range	45°F to 99°F, (7 to 37°C)
Humidification Setpoint Range	5 to 50% (303 only)
Dehumidification Setpoint Range	40 TO 95% (303 only)
Indoor Temperature Display Range	32°F to 99°F
Outdoor Temperature Display Range	-40°F to 140°F
Indoor Humidity Display Range	0°F to 100°F
RATED DIFFERENTIALS
	Fast	Slow
Heat (Single Stage/Multi-Stage)	0.6°F	1.5F
Cool (Single Stage/Multi-Stage)	1.2°F	1.7°F
Heat Pump	1.2°F	1.7°F
Emer Heat	0.6°F	1.7°F
THERMOSTAT APPLICATION GUIDE
Thermostat Configuration Options	Thermostat Applications	Maximum Stages Heat/Cool
Single Stage 1 No Heat Pump (SS1)	Gas, Oil, Electric, Heat Only, Cool Only or Heat/ Cool Systems, 2 or 3 wire Hydronic Zone (Hot Water or Steam) Systems, 24 Volt or Millivolt	1+1
Multi Stage 2 No Heat Pump (MS2)		2+2
Heat Pump 1 Single Stage Compressor Heat Pump (HP1)	Single Stage Compressor Heat Pump Systems – up to 2 Stages Aux./Emergency Heat	3+1
Heat Pump 2 Two Stage or Two Compressor Heat Pump (HP2)	Two Stage or Two Compressor Heat Pump systems – up to 2 Stages Aux./Emergency Heat	4+2

*On every application, 24VAC loads should be reviewed to be sure the indoor unit control power transformer is adequately sized.

General Information

Overview
The 302 and 303 are programmable thermostats with 5” diagnoal, blue backlit, touchscreen displays. The 303 features a builtin humidity sensor that may be used to control a whole house humidifier (HM) and cooling dehumidification (DHM).
Contents

1. 1-Thermostat
2. 1-Sub-base
3. 2-Phillips slotted head mounting screws
4. 2-Nylon Drywall Anchors
5. 1-Installation Guide / User Guide

Accessories

1. Wired Remote Indoor Sensor ZZSENSAL0300AAA
2. Wired Remote Outdoor Sensor BAYSEN30ATEMPAA
3. Wall Cover Plate BAYCOVR300AA

Installation

Location

The 302 and 303 is designed for installation in climate-controlled living spaces. Place the unit in a central location with good circulation.
For proper temperature sensing, avoid exposing the 302 and 303 to heat radiated from lamps, sunlight, fireplaces or any other radiant heat source.
Avoid locations close to windows, behind doors or alcoves with poor air circulation, adjoining outside walls, or doors that lead to the outside.
Select a location that prevents the 302 and 303 from being directly exposed to air currents from supply registers or ceiling fans. Mount the Control on a section of the interior wall that does not contain hot or cold water pipes or ductwork.

Mounting / Installation

Follow these steps to mount the 302 and 303 Control to the wall.

1. Turn OFF all power to heating and cooling equipment.
2. If an existing thermostat is being replaced:
   • Remove the existing thermostat from the wall.
   • Record color and terminal marking of each wire.
   • Disconnect the wires from the existing thermostat being careful not to allow them to fall back into the wall.
3. Pull the thermostat body off the thermostat base. Forcing or prying on the thermostat will cause damage to the unit.
4. Place base over hole in wall and mark mounting hole locations on wall using base as template. (See Fig. 1)
5. Move base out of the way. Drill mounting holes. If you are using existing mounting holes and the holes drilled are too large and do not allow you to tighten base snugly, use plastic screw anchors to secure the base.
6. Fasten base snugly to wall using the mounting holes shown in Figure 1 and two mounting screws. Leveling is for appearance only and will not affect thermostat operation.
   1. Connect wires to the terminal block on the base using the appropriate wiring diagram.
7. Push excess wire into wall and plug hole with a fire-resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.
8. Carefully line the thermostat up with the base and snap into place.

WARNING
Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.

Battery Location
Two “AA” alkaline batteries are included in the thermostat at the factory with a battery tag to prevent power drainage. Remove the battery tag to engage the batteries.
To replace batteries, set the system to OFF, remove the thermostat from the wall and install the batteries in the rear along the top of the thermostat (see Figure 2). For best results, use a premium brand “AA” alkaline battery such as Duracell® or Energizer®. If the home is going to be unoccupied for an extended period (over 3 months) and is displayed, the batteries should be replaced before leaving.

Power Stealing Switch
The power stealing switch is set to OFF. Placing the switch in the ON position may extend battery life. Power stealing is not compatible with every furnace. Cycle the furnace and verify the inducer and/or indoor blower do not run continuously or with no call for heat. If they do, return the switch to OFF position.

Figure 2. THERMOSTAT BASE PLATE 302 / 303

COOLING DEHUMIDIFICATION, HUMIDIFICATION, AND REMOTE TEMPERATURE SENSOR TERMINALS

Figure 3. – TERMINAL DESIGNATIONS SINGLE STAGE OR MULTI-STAGE SYSTEM: Heat / Cool Systems

System	RC	RH	C	Y	Y2	W/E	W2	G	O/B	6	L
Single Stage 1 (SS1)         Multi Stage 2 (MS2)	24 volt power for cooling	24 volt power for heating	24 volt common (optional for system operation, required for remote sensor)	Call for cool             Cool mode-1st stage	No Output             Cool mode-2nd stage	Call for heat             Heat mode-1st stage	No output             Heat mode-2nd stage	Blower/Circulator fan energized on a call for cool or Fan On (also energized in heating if configured for Electric Heat)	Installer Configuration Menu selects “O” or “B” for changeover function. Set to “O” terminal energized in Cool & Off mode. Set to “B” terminal energized in  Heat & mergency mode	Power closed connection for SPDT 3-wire zone valve	Fault or System Malfunction Indicator for Heat Pumps with “L” terminal connection.

Figure 4. – HEAT PUMP SYSTEMS

 

Wiring Diagrams

Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high-voltage wiring to avoid interference.

FOOTNOTES

1. A/TCONT302 {does not include humidifier(HM) and dehumidifier{DHM) terminals}
2. Remove the factory-installed BK jumper at the unit’s AFC board when enabling enhanced cooling dehumidification with the A/TCONT303 DHM terminal
3. Do not remove the factory-installed BK jumper at the indoor unit’s AFC Board when using the A/TCONT302 thermostat
4. Yl and YO connections must be made as shown for freeze protection and internally mounted condensate overflow circuits to function properly
5. Wire third-party condensate overflow switches between Y of the thermostat and Yl of the airflow control board
6. Factory-installed jumper

1 Stage AC with TEM3, TEM4, GAT2, GAM2

 

Caution: Do not run Outdoor/Remote sensor wires in the same bundle wit h HVAC wires. Also, keep away from high voltage wiring to avoid interferenceCaution: Do not run Outdoor/Remote sensor wires
in the same bundle wit h HVAC wires. Also, keep away from high-voltage wiring to avoid interference

FOOTNOTES

1. A/TCONT302 {does not include humidifier(HM) and dehumidifier(DHM) terminals}
2. Factory-installed jumper

1 or 2 Stage AC with TEM61 or 2 Stage AC with TEM6

Caution: Do not run Outdoor/Remote sensor wires in the same bundle with HVAC wires. Also, keep away from high-voltage wiring to avoid interference

FOOTNOTES

1. A/TCONT302 {does not include humidifier{HM) and dehumidifier(DHM) terminals)
2. Remove the factory-installed BK jumper at the unit’s AFC board when enabling enhanced cooling dehumidification with the A/TCONT303 OHM terminal
3. Do not remove the factory-installed BK jumper at the indoor unit’s AFC Board when using the A/TCONT302 thermostat
4. Wire third-party condensate overflow switches between Y of the thermostat andYl of the airflow control board Factory-installed jumper1) A/TCONT302 {does not include humidifier{HM) and dehumidifier(DHM) terminals)
5. Remove the factory-installed BK jumper at the unit’s AFC board when enabling enhanced cooling dehumidification with the A/TCONT303 OHM terminal Do not remove the factory-installed BK jumper at the indoor unit’s AFC Board when using the A/TCONT302 thermostat
6. Wire third-party condensate overflow switches between Y of the thermostat and Yl of the airflow control board Factory-installed jumper

1 or 2 Stage AC with GAMSB

FOOTNOTES

1. A/TCONT302 {does not include humidifier(HM) and dehumidifier(DHM) terminals)
2. Wire third-party condensate overflow switches between Y of the thermostat and Yl of the airflow control board
3. Factory installed jumper

AC/Cooling with GAF2-S

 

1 or 2 Stage Heat Pump with TAM9 orTAM7

 

 

Caution: Do not run Outdoor/Remote sensor wires in the same bundle as HVAC wires. Also, keep away from high-voltage wiring to avoid interference

FOOTNOTES

1. NTCONT302 {does not include humidifier(HM) and dehumidifier(DHM) terminals}
2. remove the factory-installed BK jumper at the unit’s AFC board when enablingenhanced cooling dehumidification with the NTCONT303 DHM terminal
3. Do not remove the factory-installed BK jumper at the indoor unit’s AFC Board when using the NTCONT302 thermostat
4. Yl and YO connections must be made as shown for freeze protection and internally mounted condensate overflow circuits to function properly
5. wire third-party condensate overflow switches between Y of the thermostat and Yl of the airflow control board
6. X2 is required to energize aux heat during defrost

2 Stage Heat Pump with GAMSB

1 or 2 Stage Heat Pump with Variable Speed Furnace

1 or 2 Stage Heat Pump with S9V2 Furnace

1 or 2 Stage Heat Pump with TAM4, GAMSA, GAF2-36M

Package Heat Cool Unit

FOOTNOTES

1. A/TCONT302 {does not include humidifier(HM) and dehumidifier(DHM) terminals}

1 or 2 Stage Heat/Cool Package Unit with Variable Speed Blower

HP Package Unit with Non-Variable Speed Blower

 

Thermostat Quick Reference

Indicates when the thermostat is calling for Heat or Cool Indicating the current power level of the 2 “AA” batteries. Full power remaining. Half power remaining. Change The batteries should be replaced at this time.

Note: If is displayed, the thermostat is battery-powered. When the battery power remaining is approximately half, will be displayed. If the home is going to be unoccupied for an extended period (over 3 months) and is displayed, the batteries should be replaced before leaving

Programming and Configuration Items

1. Displays and “Keypad Lockout” when in keypad lockout mode. Displays and “Temperature Limit” and “Keypad Lockout” when the limited range is activated and locked. Displays only “Temperature Limit” when limited range is activated.
2. Indicates period of day being programmed.
3. RUN SCHEDULE (run program) key.
4. SET TIME key or HOLD temperature key.
5. Displays “Change Filter”/ “Change Pad”/ “Change UV Lamp” when the system has run for the programmed filter/humidity pad/UV lamp time period as a reminder to change or clean your filter/humidity pad or to replace UV lamp.
6. COPY key or INSTALLER CONFIG key.
7. CLEAN DISPLAY key allows 30 seconds to wipe off the display or ADVANCE DAY key for programming.
8. Used in programming to set time and in configuration, menu to change selections.
9. “Hold Until” indicates the time when a temporary hold period will end.
10. “Hours” and “Days” displays during steps in installer configuration.
11. The words “Hold At” are displayed when the thermostat is in the HOLD mode. “Temporary Hold At” is displayed when the thermostat is in temporary HOLD mode.
12. “Humidity” indicates that the “Set At” display is Humidity setpoint.
13. “System On” indicates when heating or cooling stage is energized. “+2” indicates when a second stage is energized.
14. “Copy” indicates the copy program feature is being used during programming.
15. A steady “Cool Savings” display indicates the feature is enabled in the installer menu. A flashing “Cool Savings” display indicates the feature is active.
16. “Remote” indicates that the indoor remote temperature sensor, is being accessed. “Outdoor Remote” indicates the outdoor remote temperature sensor is being accessed.
17. Display time, remote temperature or humidity.
18. “Heat Pump” displays when the system configuration is set in HP1/HP2.
19. “Call for Service” indicates a fault in the heating/cooling systems. It does not indicate a fault in the thermostat.
20. Auto-Schedule key for Auto Schedule function or Humidity key to display current Humidity and Humidity setpoint.
21. In Configuration Menu, shows screen number.

Installer Configuration Menu

From the Home Screen: Press Menu, then the Installer Config touch key and hold for 5 seconds. The Screen Reference number appears in the top right corner of display. See reference numbers in the table below. Screen Reference numbers appear in top right corner of display. Press to advance to the next menu item or to return to a previous menu item. Press or to change a menu item option. Shaded items are not available if selected for Non-Programmable. Write the options selected in the “Option Selected” column of the menu.
Installer Note: To default the programming, clock and Configuration Menu to the Factory Default Settings, press the , and SYSTEM keys simultaneously. The thermostat display will go blank for a few seconds, and then all segments will display momentarily. For heat pump systems, Configuration Menu items 1 and 3 must be set to match the heat pump system.

 

1. This control can be configured for:
   • MS2 – Multi-Stage System (2 heat/2 cool)
   • HP1 – Heat Pump with one stage of compressor (2 heat/1 cool)
   • HP2 – Heat Pump with two stage compressor or two compressor system, Gas or Electric backup; (Dual Fuel see screen reference number 33) (4 heat/2 cool)
   • SS1 – Single Stage System (3 wire zone see wiring diagrams.
2. GAS or Electric (ELE) fan operation. If the heating system requires the thermostat to energize the fan, select ELE. Select GAS if the heating system energizes the fan on a call for heat.
   Note: Resetting the thermostat switches the option to GAS.
3. O/B Terminal selection – Selects the operation of the reversing valve (when item 1 is set to HP1 or HP2 only).  When set to “O” the changeover valve will be energized in COOL to accommodate the majority of heat applications. If the heat pump requires the changeover valve to energize in HEAT, select “B”.
4. Programs per week – This control can be configured for 7 independent day or 5+1+1 day programming or nonprogrammable modes. Default is 7-day mode. The display indicates “7 Days” as default. Other options “5  Days” or “0 Days” can be selected. If “0 Days” is selected for non-programmable mode, the step for EMR will be skipped, as this feature will not be available in this mode.
5. Program Steps per day – Not available if configured for non-programmable. This control can be configured for 4 or 2 program steps per day. Default is “4 PS” and can be toggled between 4 PS and 2 PS.
6. System Switch Configuration (MS2/SS1) – This thermostat is configured for Heat and Cool with Auto changeover default (Cool-Off-Heat-Auto). It can be configured as Heat & Cool (Cool-Off-Heat), or Heat Only (Off-Heat), or Cool Only (Cool-Off). When the control is in heat pump configuration (HP1/HP2), the system switch configuration will have an additional mode, Em for Emergency.
7. Energy Management Recovery (EMR) – (this step is skipped if configured as non-programmable). When set to “On” causes the thermostat to start heating or cooling early to make the building temperature reach the program setpoint at the time you specify. Example: The heating program is 65°F at night and 70° at 7 AM. If the building temperature is 65°F, the difference is 5°F. Allowing 5 minutes per °F rise, the thermostat setpoint will change to 70° at 6:35 AM. Cooling allows more time per °F, because it takes longer to reach temperature.
8. 8, 9 & 10 Cycle Rate Selection – Heat, Cool, EM The factory default setting is fast cycle (FA Cr) in all modes (Heat, Cool, Em). To change to slow cycling (SL, Cr), press touch keys or toggle between FA & SL. The cycle rates are below:
   • Mode Med Slow
   • Heat 0.6°F 1.5°F
   • Cool 1.2°F 1.7°F
   • Heat Pump 1.2°F 1.7°F
   • Emer Heat 0.6°F 1.7°F
9. Stage Cycle Completion (SC On) will cause the thermostat to complete heating and/or cooling cycles on the highest stage engaged during the cycle. Thermostat will not reduce heating or cooling stages before the heating or cooling cycle is satisfied and all stages are turned off.
10.  Select Compressor Lockout (CL) – Selecting the default (CL On) will cause the thermostat to wait 5 minutes between cooling cycles. This is intended to help protect the compressor from short cycling. Some of the newer compressors have a time delay built in and do not require this feature to be activated in the thermostat. Your compressor manufacturer can tell you if this lockout feature is already present in their system. When the thermostat compressor time delay is activated, it will flash the set point for up to five minutes.
11. Select Continuous Display Lighting (dL) – In low lighting conditions, display backlight improves the display contrast.
12. Select Temperature Display Adjustment 5 LO to 5 HI This allows you to adjust the room temperature display by -5°F to +5°F in 1° steps. Your thermostat was accurately calibrated at the factory, however you have the option to change the display temperature value to match the previous thermostat, if you so prefer.
13. Select °F or °C Readout – Changes the display readout to Celsius or Fahrenheit as required. Select Audio Prompting (Beeper) On or Off – Factory default setting is b, On. If you wish to turn off the beeper
    select OFF.
14. Select Daylight Saving Time Calculation – This feature will allow the thermostat to calculate the DST automatically and apply it to the Real Time Clock display. Default is On.
15. Select Automatic Schedule – Heat Mode –
16. Select Automatic Schedule – Cool Mode – Not available if configured for non-programmable. This feature allows programming a “Comfort Temperature” into all program periods with the Auto Schedule key. When Heat AS (for Heat mode) or Cool AS (for Cool mode) is selected On, the Auto Schedule feature is ready to be set. Off indicates that the feature is not ready to be used or a “Comfort Temperature” is already set. See Auto Schedule in the Programming section.
17. 20, 21 Select Cool Savings™ – Cool Savings™ provides an energy saving temperature offset (from 1-6 degrees) under peak cooling load conditions (high outdoor temperatures). If selected on, Cool Savings™ becomes active when the air-conditioner runs for periods of longer than 20 minutes.
    When active, Cool Savings™ gradually offsets the indoor temperature display downward. The first 1° of adjustment will take one hour of continuous air conditioner run time with subsequent 1° adjustments occurring with each additional half hour of run time (ex for a 2° offset, the air conditioner would need to run continuously for 1 ½ hours). The offset is limited to the number of degrees you select from 1 up to 6. When an offset starts or is active, “Coo  Savings” will flash on the display.
    The principle of this energy1 or 2 Stage AC with TEM61 or 2 Stage AC with TEM61 or 2 Stage AC with TEM61 or 2 Stage AC with TEM61 or 2 Stage AC with TEM6 saving feature takes advantage of the long air conditioning run times lowering the indoor humidity allowing a slightly higher temperature to feel comfortable. As the peak load subsides, this feature also takes advantage of the air conditioner’s increased capacity under more efficient conditions to gradually reduce the offset back to zero and return control to the selected setpoint temperature. If Cool Savings is selected off, no temperature offset will occur.
18. Compressor Optimization – (Not available on earlier models) CO provides a delay in circulator fan operation after the compressor turns on or off. With CO selected ON, when the compressor turns on (for a call for heat in heat pump or a call for cool) the fan will be delayed for five seconds before turning on to allow the air to be heated or cooled. After the compressor turns off for call for cool, the fan will continue to run for 20 seconds to capture additional cooling from the system. If CO is set to OFF, there will be no delay in fan operation.
19. Comfort Alert with Active Protection – (For systems that use Comfort Alert.) Turn this feature ON to enable active protection. This allows the thermostat to identify fault codes sent by the Comfort Alert module when compressor damage is possible and react to those codes by turning the compressor off. Fault codes from the Comfort Alert module will flash on the thermostat. If a Comfort Alert module is not connected, or to disable active protection, turn this feature OFF. If a Comfort Alert module is connected and this feature is turned OFF, the thermostat will still receive and flash the fault codes from the Comfort Alert module, but the active protection will not be enabled to protect the compressor.
20. Heat Temperature Limit Range – This feature adjusts the highest setpoint temperature for heat. The default setting is 99°F. It can be changed to a setting between 62°F and 98°F. The “temperature limit” icon will be displayed to the left of your setpoint temperature when using this feature. The “temperature limit” icon will flash if an attempt is made to adjust the temperature beyond the range selected.
21. Cool Temperature Limit Range – This feature adjusts the lowest setpoint temperature for cool. The default setting is 45°F. It can be changed to a setting between 46°F and 82°F. The “temperature limit” icon will be displayed to the left of your setpoint temperature when using this feature. The “temperature limit” icon will flash if an attempt is made to adjust the temperature beyond the range selected.
22. 26, 27. Keypad Lockout –
    This step allows you to select the type of lockout or limited-range security required. If no lockout or limited range security is required, press to advance the menu. Three security settings are available in this menu item. Use the or keys to select the lockout desired.
    Lockout selections are:
    “Keypad Lockout and L” = Total Lockout. Total Lockout locks all keys.
    “Keypad Lockout and P” = Partial Lockout. Partial Lockout allows only the or keys to operate within your set temperature limits
    “Temperature Limit/Keypad Lockout” prevents changing the temperature limits in the Configuration Menu.
    After the type of lockout is selected, press Keypad Lockout Combination Number Selection Display will read “000” “Keypad Lockout”.
    Skip this step and continue through the remainder of the configuration menu if you require an Air Filter Change out indicator or Humidifier Pad Change out indicator by pressing the key to advance.
    Return to this point when you are ready to start your selected lock-out and continue by:
    Pressing or keys to select your keypad lockout combination number. Note: “000” is not a valid combination choice.
    Record the number you select for future use. Press to exit the menu. The security feature you select will start in 10 seconds. The system key will remain active for 10 seconds to allow setting Heat, Off, Cool or Auto. To unlock the keypad, press Menu, then press Installer Config. Display will show “000” and keypad lock. Enter the code used to lock the keypad and press it.
23. 28, 29 Select Fast Second Stage, ON or OFF –
    Not available if configured for SS1. Selecting FA ON forces additional heat stages to come on quickly when is used to raise the temperature a few degrees above the room. Select this setting if you want the heat to increase quickly when you manually raise the temperature. Selecting FA OFF allows the thermostat to calculate an optimal time to bring on additional stages of heat. When the is used to raise the setting above the room temperature additional heat stages may come on very quickly or very slowly (up to 30 minutes later) depending on recent system performance. Select this setting if you do not require the additional heat stages to come on quickly when you manually raise the setting and want to allow the thermostat to stage based on recent system performance. The Fast Cool feature operates the cooling stages in the same manner as Fast Heat, On or Off when the temperature is lowered below the room setting.
24. Select Remote Temperature Sensor Enabled – ON enables a remote sensor connected to the thermostat and displays the sensor temperature in the clock digits. OFF (default) indicates no remote sensor connected or enabled.
25. Select Remote Sensor as Indoor or Outdoor – If 30 is enabled, select Indoor or Outdoor Remote. Default is Remote Indoor.
26. Select Local Sensor Disable – If 31 is selected Indoor, the thermostat Local Sensor can be disabled so the displayed temperature will be from the Remote Sensor. Default is On LS. To disable the Local Sensor, change selection to OFF LS.
27. Select Dual Fuel Feature (dF) – This feature is applicable only in heat pump modes (HP1, HP2). Enables (On) or disables (Off) dual fuel feature of thermostat.
28. Select Dual Fuel Temperature – With dF selected On and outdoor remote sensor available, select the outdoor temperature the thermostat will use to determine when to switch to gas heat and shut down the compressor. When the outdoor temperature falls below the selected temperature the gas heat will begin. Default is 35°, but can be set in the range of -5 to 50°. A lower setting will delay the start of gas heat allowing cooler temperatures in the home.
29. Select Dual Fuel Setting – With DF selected On and no outdoor sensor, select the dF setting from 01-09. Factory default is 05. The dF setting influences when second stage comes on. The factory default creates a separation of approximately 1°F between stages. Increasing the setting decreases the separation between stages. Decreasing the value increases stage separation. This adjustment allows a small change in the operation of your heat pump system versus your auxiliary system relative to the thermostat adjustment. The higher the number the sooner the auxiliary stage energizes for better comfort. The lower the number the longer period of time before auxiliary is energized for more economy.
    Note: This setting is not minutes or degrees. It is numeric setting that will influence the internal thermostat calculation for staging.
30. Select Compressor Delay (Cd) – For use with Dual Fuel System. After the auxiliary heat is turned on, the compressor(s) shut down is delayed for the time selected (in seconds). This delay is factory set to 60, but can be set in the range of 0 to 99.
31. Select Auxiliary Off (AO) – Applicable with HP1 or HP2 selected with outdoor sensor. Select the temperature that will inhibit the auxiliary heating stage. As long as the outdoor temperature is above the selected temperature, the auxiliary heat will not turn on. The default setting is 80°(disabled), but can be set in the range of -5 ° to 79°. Thermostat will
    not allow a setting at or below the (dF) dual fuel setting.
    If indoor temperature drops below 45° because of a possible heat pump malfunction, the thermostat will turn off the pump and switch to Auxiliary heat. “Call for Service” will display on screen.
    There are two ways the thermostat will return to normal heat pump operation:
    • Press any key to retry the pump and erase the “call for service icon.
    • When setpoint is achieved on Auxiliary, system will return to heat pump operation on next call for heat.
      From this point on screen reference numbers are specific to either the 302 or the 303 model
32. 38. (303 ONLY) Select Programmable Blower Balance Point (bP) – Applicable with HP1 or HP2 selected, dF On with outdoor sensor. Requires DHM connection from thermostat to heat pump system. This feature de-energizes the DHM terminal to operate the blower at a slower speed for first stage heat when the outdoor temperature is below the temperature selected. This circulates warmer air than the higher fan speed. The default is 80° (disabled), but can be set from 20° to 79°. Select an outdoor temperature where the air coming out of the ducts begins to feel cool and the thermostat will lower the fan speed to circulate warmer air.
33. 39. (303 ONLY) Humidity Display (Hd) – Selecting HD On enables the display to alternately show the current time and the humidity. If HD is selected OFF, the display will not show the humidity. (See page 10 for Humidity setpoint range)
34. (303 ONLY) Adjustable Humidity Display – The display will show the ambient humidity and 00 (default). The setting can be changed from -20 and LO to 20 and HI. The displayed humidity will change as the offset is changed. In Run mode, the displayed humidity will be the ambient humidity adjusted by the setting selected.
35. (303 ONLY) Auto Humidity Reduction (HR) – This feature automatically lowers humidity setting when the outside temperature drops to prevent the interior windows/walls from reaching the dew point where water condenses on surfaces. This feature default is OFF. It can be changed to select LO (low humidity reduction) or HI. To achieve automatic humidity reduction, the thermostat lowers the humidity when furnace cycles are long. When the outside temperature rises, it increases humidity. “LO” indicates a low amount of humidity reduction.
36. (303 ONLY) Automatic Humidification (AH) – This feature if enabled allows for humidification independent of a call for heating – useful in arid climates where addition humidification in heating and/or cooling is desired. If enabled, will energize the humidifier and circulator blower (“G” terminal and the “HM” terminal) if the actual humidity is below the humidity 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.
37. 303 ONLY) Cycle Humidifier (CH) – This feature provides an option 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 default 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.
38. (303 ONLY) 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 Comfort (OC) is enabled, this feature automatically reduces  indoor humidity with a call for Cooling if humidity is 2% above the 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 the Humidity key again. This dehumidification feature uses less energy by maintaining temperature and dehumidifying only when a call for Cooling is required. Optimal Dehumidification (Od) when enabled, this feature automatically 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 and 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)
39. 45, 46 on 303 (38/39 on 302)
    Change UV Lamp – This feature allows the thermostat 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 optimum 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.
40. 47, 48 (303 ONLY) 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 maintain or clean your humidifier. The factory set interval for the “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.
41. 49, 50 on 303 (40/41 on 302)
    Select Change Filter Run Time – This feature allows the 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 application, 200 hours of run time is approximately 30 days.

User Guide – Operating Your Thermostat

CAUTION
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. To Prevent compressor and/or property damage, if the outdoor temperature is below 55°F, do not operate the cooling system.
If at any time your system does not operate properly, contact a qualified service person.

Fan Operation

Check thermostat operation. If your system does not have an indoor fan, 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.

Heating

1. Press the SYSTEM key to select HEAT. If the heating system has a standing pilot, be sure to light it.
2. Press to adjust thermostat setting to 1° above the room temperature.
3. The heating system should begin to operate if the compressor lockout time (min. OFF time of 5 minutes is met.
   If the minimum time is not met the setpoint temperature will flash.
4. The display should show “System On”. However, 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 Configuration menu, item 11).
5. 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”.
6. Press to adjust the thermostat below room temperature.
   The heating system should stop operating.

Humidifier Optional
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.1
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 operation is

1. If Auto Schedule is displayed instead of Humidity, Auto Schedule must be turned off in the Configuration Menu not desired, or you prefer back-up heat only.
2. Press the SYSTEM key to select EM. “EM Heat Mode” will flash on the display.
3. Press to adjust the thermostat setting above room temperature. 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 system is operating.
4. Adjust the 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”.
5. Press to adjust the thermostat below room temperature.
   The heating system should stop operating.

Cooling

1. Press SYSTEM to select “Cool”.
2. Press to adjust the thermostat setting below room temperature. 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 12).
3. Adjust the 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.

Cooling Dehumidification2

1. 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 indicating it is calling for dehumidification.
2. If the room humidity is lower than the adjustment range, press to 40% and hold it for four seconds. This will force the DeHum On for one complete cooling cycle to test the dehumidification equipment.
3. After adjusting the humidity setting the display will return to temperature in approximately 10 seconds. To switch the display back to temperature immediately after adjusting humidity setting press HUMIDITY again.

Choose the Fan Setting (Auto or On or Prog)

1.  Fan Auto/On – Traditional Fan Settings
   Press Fan to select Auto or On. The most commonly used setting is Auto. Fan Auto runs the fan only when the heating or cooling system is operating. Selecting Fan Onruns the fan continuously for increased air circulation or to allow additional air cleaning if the system is equipped with an Electronic Air Cleaner.
2. FAN Prog – Comfort Circulating Fan Feature Pressing FAN until FAN Prog appears activates the Comfort Circulating Fan Option. This causes the thermostat to cycle the fan on for 10 minutes and off for 20 minutes if the thermostat has not called for heat or cool during the past 60 minutes.

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 configured 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 automatically 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 set point temperature and the thermostat will maintain the new set point temperature until Run Schedule is pressed to resume program operation.
Program Override (Temporary Override)
Press or keys to adjust the temperature. This will override the temperature setting for a (default) four-hour override period. The override period can be shortened by pressing or lengthened by pressing. The 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.

Programming

Set Current Time and Day

1. Press Menu key to enter installer menu. Then press Set
   Time once to indicate hour & AM or PM designation in clock display.
2. Press and hold either the or touch key until you reach the correct hour and AM or PM designation.
3. Press Set Time again to display minutes only in clock display.
4. Press and hold either the or touch keys until you reach the correct minutes.
5. Press Set Time once again to display year.
6. Press either the or touch key until you reach the correct year.
7. Press Set Time once again to display month.
8. Press either the or touch key until you reach the correct month.
9. Press Set Time once again to display date of the month along with day of the week at top row (which is automatic).
10. Press and hold either the or touch key until you reach the correct day of the month and day of the week displayed at the top row.
11. Press Run Schedule once or twice to remove the key.
    Now the display will show the correct time and room temperature.

Automatic Daylight Saving Calculation
The Real Time Clock will adjust automatically for daylight savings time, in the following manner: Increment one hour at 2 AM on the second Sunday of March and decrement one hour at 2 AM on the first Sunday of November. The daylight saving feature can be enabled or disabled in the installer configuration menu. Default is DS ON (enabled). After entering installer configuration mode, momentarily press touch key until the display indicates dS (in actual temperature digits) and on (default – in clock digits). and keys will toggle display and operation from on to OFF.

Programming Tip: Copy Program

1. When programming your thermostat, you may copy the program from one day to another day or group of days using the Copy key. In 7 day programming mode, a day can be copied to another day or all six other days. In 5+1+1 day programming mode the weekday (Mon – Fri) program can be copied into Sat and Sun or either Sat or Sun.
2. To copy a program from one day to another:
3. In Set Schedule mode, enter the program for the day or select the day you wish to copy by pressing Advance Day.
4. Press Copy. The display will show “Copy” next to the SYSTEM key and the day of the week that will be copied.
5. Press Advance Day. The day being copied will be indicated and the other days will be flashing.
6. If you wish to copy to all days skip to next step or press Advance Day until the day you wish to copy to is flashing.
7. Press Copy. “Copy” will disappear, the day you copied from will disappear and the day (s) you copied to will be on.
8. If you wish to copy this same program into other days, press Copy and repeat steps 3, 4 and 5.
9. Press Run Schedule to return to normal operation.
10. Fill in the blank schedule provided and then:

Enter the Heating Program

1. Press the Menu key and then press Set Schedule.
2. Press SYSTEM key to select “Heat” in the system switch area indicating the active mode being programmed. You can switch to the other mode by pressing the system switch at any time.
3. The top of the display will show the day(s) being programmed. The time and set at temperature are also displayed. “Morning” will also be displayed to indicate the period.
4. Press or key to change the temperature to your selected temperature for the 1st heating period (Morning).
5.  Press or key to adjust the start time for period. The time will change in 15-minute increments.
6. Press FAN to select Auto or Prog.
7. After you have set the time and the temperature for the period to begin, press Set Schedule to advance to the next program period.
8. Repeat steps 2 through 6 until all of the program times and temperatures are set for all program periods on that day.
9. Press “Advance Day” to change to the next day and repeat steps 2 through 8.
10. When programming is complete and all of the times and temperatures match your desired heating schedule, press
11. Run Schedule. The thermostat will now run your program

Enter the Cooling Program

1. Press the SYSTEM key until the “Cool” icon appears.
2. Follow Enter Heating Program instructions for Menteringcooling times and temperatures.

Automatic Schedule
Auto-Schedule Heat is a fast way to program all the heating temperatures during the day to a comfortable temperature and then lower the temperature 6° at night. Auto Schedule Cool will program all of the cooling time periods to the same temperature.
Note: Auto Schedule is available only when the thermostat is first powered on, after the thermostat has been reset, or anytime you turn AS on in the Configuration Menu (item 17 AS Heat or 18 AS Cool). After use in heating and cooling, Auto-Schedule on the display will change to Humidity.
Heating Example:

1. In Heat mode, press Auto Schedule once.
2. Press or to select a comfortable day time temperature (example 72°).
3. Press Auto Schedule again. Your thermostat is now programmed for 72° from 6:30 AM until 10:30 PM at 72°. At 10:30 PM, your thermostat will set back 6° to 66°.

Energy Saving Factory Pre-Program
The 302 and 303 thermostats are programmed with the energy saving settings shown in the table below for all days of the week. If this program suits your needs, simply set the thermostat clock and press the RUN key.
The table below shows the factory set heating and cooling schedule for all days of the week.

	* Wake Up (Morning)		Leave For Work (Day)		* Return Home (Evening)		Go To Bed (Night)
Heating Program	6:00 AM	70°F	8:00 AM	62°F	5:00 PM	70°F	10:00 PM	62°F
Cooling Program	6:00 AM	75°F	8:00 AM	83°F	5:00 PM	75°F	10:00 PM	78°F

You can eliminate these two program periods in the configuration menu (reference #5) if the building is occupied all day.
Day period will change to 6:00 AM and 70° and can be programmed as required.

Planning Your Program – Important

The Heating and Cooling Program schedules provided allow you to pencil in your own program times and temperatures.
The 302 and 303 Thermostats come configured for 7-day programming and can also be configured for 5+1+1 programming (see configuration section).
Factory settings are listed on Monday, Saturday, and Sunday. If you are re-programming a 5+1+1 day schedule, pencil in your own times and temperatures directly below the factory times and temperatures.
If you are re-programming a 7-day schedule, fill in all lines with the times and temperatures you want.
Keep the following guidelines in mind when planning your program.

1. In Heating, lower temperatures will save energy.
2. In Cooling, higher temperatures will save energy.
3. If you plan on using Auto Changeover, do not program the heating temperature higher than the cooling temperature.

Worksheet for Re-Programming 5+1+1 and 7 Day Program

Heating Program

Wake Up (Morning)

Fan

Leave For Work (Day)

Fan

Return Home (Evening)

Fan

Go To Bed (Night)

Fan

MON

6:00 AM

70°F

Auto

8:00 AM

62°F

Auto

5:00 PM

70°F

Auto

10:00 PM

62°F

Auto

TUE

WED

THU

FRI

SAT

6:00 AM

70°F

Auto

8:00 AM

62°F

Auto

5:00 PM

70°F

Auto

10:00 PM

62°F

Auto

SUN

6:00 AM

70°F

Auto

8:00 AM

62°F

Auto

5:00 PM

70°F

Auto

10:00 PM

62°F

Auto

Cooling Program

Wake Up (Morning)

Fan

Leave For Work (Day)

Fan

Return Home (Evening)

Fan

Go To Bed (Night)

Fan

MON

6:00 AM

75°F

Auto

8:00 AM

83°F

Auto

5:00 PM

75°F

Auto

10:00 PM

78°F

Auto

TUE

WED

THU

FRI

SAT

6:00 AM

75°F

Auto

8:00 AM

83°F

Auto

5:00 PM

75°F

Auto

10:00 PM

78°F

Auto

SUN

6:00 AM

75°F

Auto

8:00 AM

83°F

Auto

5:00 PM

75°F

Auto

10:00 PM

78°F

Auto

Wired Remote Temperature Sensing

One remote temperature sensor can be installed indoor or outdoor and connected to the thermostat by a maximum cable length of 100 meters (300 feet). Terminals +, S and – on the terminal block allow connection of the remote sensor. The thermostat must have 24 VAC Common connection to terminal C for the remote sensor to operate. The remote sensor can be enabled or disabled in the Installer/ Configuration menu, item 29.
When remote sensor, Remote, is selected Off (factory default), no remote sensor is enabled. When remote sensor is selected On, the next step is to select the remote as indoor, Remote In, or outdoor, Outdoor Remote. If the remote is selected as Remote In, an additional step will be to select if the temperature shown on the display will be from the thermostat, LS On, or the remote sensor LS Off. In normal operation, when a remote sensor is enabled the time digits of the display will alternate between the time and the remote temperature for three seconds each. Above the remote temperature will be Remote, for indoor sensor or Outdoor Remote, for outdoor sensor. If the remote sensor is an indoor sensor and the local display has been disabled, the temperature displayed as the room temperature will be the remote sensor temperature.
Sensing Range:

• Outdoor temperature range is -40oF to 140oF
• Indoor temperature range is 32oF to 99 oF

Averaging or Weighting Remote Sensors

The thermostat will weight or average the temperature of the indoor remote sensor with the local sensor in the thermostat for each program period. The averaging will be active only when the local sensor and the indoor remote sensor are both functional and enabled in the Installer/Configuration menu. When the thermostat is in the Set Schedule mode, the weight of the indoor sensor will be shown in the current temperature digits of the display. The weight will show as A2 (average and default), H4 (high) or L1 (low). Pressing the and keys at the same time will change the weight for the program period. The weight of the thermostat sensor is fixed.
In normal operation of the thermostat, the current temperature displayed will be the weighted average of the local sensor and the remote sensor using the formula (local sensor weight x local sensor temperature) + (remote sensor weight x remote sensor temperature) / (local sensor weight + remote sensor weight).
Example: Local sensor temperature is 80° and the remote sensor is 70°.

• If weight is selected H4, the averaged temperature of 72° will be displayed.
  (1 x 80) + (4 x 70) / 5 = 72°
• If the weight is selected A2, the average temperature of 73° will be displayed.
  (1 x 80) + (2 x 70) / 3 = 73.3°
• If weight is selected L1, the average temperature of 75° will be displayed.
  (1 x 80) + (1 x 70) / 2 = 75°

The example shows that the weight selected would prioritize the overall averaged temperature between the two sensors. The high weight selection caused the remote sensor to have a higher influence in the calculated temperature average than the local sensor and the low weight selection caused the remote sensor to have less influence.
Dual Fuel Temperature Setpoint
When the thermostat is configured for Heat Pump mode and the Dual Fuel feature is selected on, the thermostat can monitor the outside temperature using remote sensor F145-1378 or use software logic to determine when to switch to gas heat and shut down the compressor. This eliminates the need for a fossil fuel kit.
The user-selectable temperature is called the dual fuel temperature setpoint, dF and is set in the Installer/Configuration menu, items 33 or 34. With outdoor remote sensor installed and enabled, the dual fuel temperature setpoint (menu item 33) can be set to a temperature of -5° through 50°. When outdoor remote sensor is not installed, a software logic-based dual fuel number (menu item 34) from 01 to 09 can be selected. A higher temperature or dual fuel setting will provide a smaller stage separation between the heat pump and Aux to give more comfort. A lower temperature or number will provide a larger stage separation for more economy.
After the dual fuel temperature setpoint is set and is pressed, a delay, Cd, can be set for compressor shutdown after the auxiliary stage is energized. This delay can be set from 0 seconds to 99 seconds to minimize the time that the system may blow cooler air until the alternate source of heat comes on. Default setting for delay is 60. When setting the delay, if the or keys are held depressed, the setpoint will increase or decrease at the rate of one degree every half second for the first three seconds and double the speed after three seconds.

Blower Balance Point for Heating
Requires DHM connection from the thermostat to heat pump system. Air-to-air heat pumps use a fast fan speed to circulate warm air for first stage heating. As outdoor temperatures drop, the heat pump produces less heat and a high fan speed makes the air from the ducts feel cooler. Blower Balance Point allows you to select an outdoor temperature to slow the fan speed so the air from the duct feels warmer. Select an outdoor temperature where the air from the ducts starts to feel cool (Installer Configuration Menu item 37). When the outdoor temperature drops to the selected temperature, the thermostat will slow the fan speed so the outlet air feels warmer.

Troubleshooting

Reset Operation
Note: If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat by removing the thermostat from the wall plate and removing batteries for 2 minutes. After two minutes, replace the batteries and replace thermostat on wall plate. If the thermostat 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. 2. Furnace power switch to OFF. 3. Furnace blower compartment door or panel loose or not properly installed. 4. Loose connection to thermostat or system.	Replace fuse or reset breaker. Turn switch to ON. Replace door panel in proper position to engage safety interlock or door switch. Tighten connections.
No Heat	1. Pilot light not lit. 2. Furnace Lock-Out Condition. Heat may also be intermittent.   3. Heating system requires service or thermostat requires replacement.	Re-light pilot. Many furnaces have safety devices that shut down when a lock-out condition occurs. If the heat works intermittently contact the furnace manufacturer or local HVAC service person for assistance. Diagnostic: Set SYSTEM Switch to HEAT and raise the setpoint above room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. 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 HVAC service person to verify the heating is operating correctly.
No Cool	1. Cooling system requires service or thermostat requires replacement.	Same 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.
Heat, Cool or Fan Runs Constantly	1. Possible short in wiring. 2. Possible short in thermostat. 3. Possible short in heat/cool/fan system. 4. FAN Switch set to Fan ON.	Check each wire connection to verify they are not shorted or touching together. No bare wire should stick out from under terminal block. 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.
Thermostat Setting & Thermostat Thermometer Disagree	1. Thermostat thermometer setting requires adjustment.	The thermometer can be adjusted +/- 4 degrees. See Temperature Display Adjustment in the Configuration Menu section.
Furnace (Air Conditioner) Cycles Too Fast or Too Slow (narrow or wide temperature swing)	1. 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 so there is no increase in energy use. If you would like an increased cycle time, choose SL for slow cycle in the Configuration menu, step 7 (heat) or 8 (cool). If an acceptable cycle rate is not achieved, contact a local HVAC service person for additional suggestions.
Forgot Keypad Lockout Code		Press the menu key (key will disappear) and hold in for 20 seconds. This unlocks the thermostat.
Blank display any or keypad not responding	1. Voltage Spike or static discharge	Use the Reset Operation shown above.
Thermostat does not have Menu Screen Numbers	1. Earlier version of thermostat	To access the earlier version instruction sheet (37-6914E) go to www.white-rodgers.com, enter 1F95-1291 in Model Number Search

About American Standard Heating and Air Conditioning
American Standard has been creating comfortable and affordable living environments for more than a century. For more information, please visit www.americanstandardair.com.

Reference

Download Manual:

American Standard ACONT302 Touchscreen Thermostat Installation Guide

American Standard ACONT302 Touchscreen Thermostat Installation Guide