Trane 52 Programmable Thermostat Manual

							
Set Clock/Day/Schedule

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Auto Changeover (Setup Function 12)
Auto Changeover is a feature used in  
climates where both air conditioning and 
heating are used on the same day. When the 
system is set to Auto, the Comfort Control 
automatically selects heating or cooling 
depending on the indoor temperature.
Heat and cool settings must be at least 3 
degrees apart. The Comfort Control will  
automatically adjust settings to maintain this 
3-degree separation (called “deadband”). 
The 3-degree separation between heating 
and cooling set temperatures is fixed, and 
cannot be changed.
Built-in compressor protection (Setup Function 15)
This feature helps prevent damage to the 
compressor in your air conditioning or heat 
pump system.
Damage can occur if the compressor is re-
started too soon after shutdown. This feature 
forces the compressor to wait for a few  
minutes before restarting.
During the wait time, the message Cool On 
or Heat On (heat pumps only) will flash on 
the display. When the safe wait time has 
elapsed, the message stops flashing and the 
compressor turns on.
Message flashes until safe restart time has elapsed
Adaptive Intelligent Recovery™ (Setup Function 13)
Adaptive Intelligent Recovery eliminates guesswork when setting your schedule. It 
allows the Comfort Control to “learn” how long your furnace and air conditioner 
take to reach the temperature you want.
Just set your program schedule to the time you want the house to reach your 
desired temperature. The Comfort Control then turns on the heating or cooling at 
just the right time to reach your scheduled temperature at your scheduled time.
For example: Set the Wake time to 6 am, and the temperature to 70°. The heat will 
come on before 6 am, so the temperature is 70° by the time you wake at 6. 
						

							
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Quick reference to controls
Digital display screenBattery holder 
Temperature buttons Press to adjust temperature  settings 
Hold button Press to override programmed temperature control 
Function buttons Press to select the function displayed just above each button. (Functions change depending on the task.)
Quick reference to display screen
Current inside temperature Low battery warning Current time/day 
Current program period Wake/Leave/Return/Sleep
Temperature setting
System status  On when “calling” for heating or cooling;  flashes when waiting for compressor restart.
System setting(Heat/Cool/Auto/Off)
Fan setting(Auto/On)Function buttons Press the button beneath each function to view or change settings. (Functions change depending on the task.)
Battery replacement
Press and pull to removeInsert fresh AA alkaline batteries, then reinstall  battery holder
Set Clock/Day/SchedulePress to set time, day or program schedules. 
						

							
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In case of difficulty
If you have difficulty with your Comfort Control, please try the suggestions below. 
Most problems can be corrected quickly and easily. 
Display is blank• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
Temperature  settings do not change
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat:  0° to 90°F (.5° to 32°C).
• Cool:  0° to 99°F (15.5° to 3°C).
Heating system does not respond (“Heat On” appears on screen)
• Check for 2 VAC at the equipment on the secondary side of the trans-former between power and common. If voltage is not present, check the heating equipment to find the cause of the problem.
•  Check for 2 VAC between the heat terminal (W) and the transformer  common. If 2 VAC is present, the Comfort Control is functional. Check  the heating equipment to find the cause of the problem.
•  Check for loose or broken wires between the Comfort Control and the  heating equipment.
Cooling system does not respond (“Cool On” appears on screen)
• Check for 2 VAC at the equipment on the secondary side of the trans-former between power and common. If voltage is not present, check the cooling equipment to find the cause of the problem
•  Check for 2 VAC between the cooling terminal (Y) and the transformer common. If 2 VAC is present, the Comfort Control is functional. Check  the cooling system to find the cause of the problem.
•  Check for loose or broken wires between the Comfort Control and the  cooling equipment.
Fan does not turn on in a call for heat
• Check Installer Setup, Function 3 (Fan Control), to make sure the fan con-trol is properly set to match the type of system (see page  ).
Heat/cool both on at same time, or heat does not turn off
• Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed heating/cooling equipment (see page  ).
• Check to make sure heating and cooling wires are not shorted together. 
						

							
In case of difficulty
“Cool On” or “Heat On”  is flashing
• Compressor protection timeout is engaged. Wait 5 minutes for the  system to restart safely, without damage to the compressor.
Heating equip-ment is running in cool mode
• Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed heating/cooling equipment (see page  ).
Cannot change  system setting to “Heat”
• Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed heating equipment (see page  ).
• Change Installer Setup, Function 12 (System Setting) to Manual or Auto Changeover (see page  ).
Cannot change  system setting to “Cool”
• Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed cooling equipment (see page  ).
• Change Installer Setup, Function 12 (System Setting) to Manual or Auto Changeover (see page  ).
“Heat On” is not displayed• Change the System Setting to Heat, and set the temperature level above the current room temperature.
“Cool On” is not displayed• Change the System Setting to Cool, and set the temperature level below the current room temperature.
 Accessories & replacement parts
Please contact your distributor to order replacement parts.
Battery holder ........................................................Part Number THT02506Cover plate assembly  ...........................................Part Number BAYCOVR700A(Use to cover marks left by old thermostats.)
Specifications
Temperature Ranges•  Heat:  0° to 90°F (.5° to 32°C)• Cool:  0° to 99°F (15.5° to 3°C)
Operating Ambient Temperature• 32° to 120°F (0° to  8.9°C)
Shipping Temperature• -20° to 120°F (-28.9° to  8.9°C)
Operating Relative Humidity• 5% to 90% (non-condensing)
Physical Dimensions• 3-9/1” H x 5-13/1” W x 1-1/2” D• 91 mm H x 1 mm W x 38 mm D
Electrical Ratings
Terminal  Voltage (50/60Hz)  Running Current
W (O) Heating 20-30 VAC  0.02-1.0 A
Y Cooling  20-30 VAC  0.02-1.0 A
G Fan  20-30 VAC  0.02-0.5 A
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Pub. No. 18-HD25D20-3  03/0
200 Troup HighwayTyler, TX 511-9010
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