PC8900 Control Panel Details-- (These are no longer available for sell/purchase.
Here is the link for the Honeywell replacement, VisionPRO IAQ).

The control panel for the Perfect Climate Comfort Center® Control System 
mounts in the living space and accurately measures and controls room temperature 
and humidity.  Use with the W8900 Remote Module.

CONSUMER BENEFITS
 
	-Automated, all-in-one comfort control.
	-Large, continuously lit liquid crystal display (LCD).
	-Seven-day (auto copy) programming.
	-Simultaneous display of heat and cool setpoints.
	-No batteries required; indefinite program retention.
	-Circulation fan setting improves indoor air quality.

INSTALLER BENEFITS

	-Compatible with 99 percent of residential heating and cooling equipment.
	-Requires only four wires for installation.
	-All system accessories wire to W8900 Remote Module.
	-Keyboard lockout (field-configurable) protection available.
	
The PC8900 Control Panel can be configured in the field for:

 	-Automatic or manual changeover.
 	-F or C display
 	-12- or 24-hour clock.
 	-Adaptive Intelligent Recovery® or conventional recovery.
 	-Humidity control in heating or cooling; frost control optional with outdoor sensor.
 	-Outdoor, remote , and discharge temperature sensor available.
 	-Fan overrun in cooling.
 	-Ventilation control.

 APPROVALS: 

 	-Federal Communications Commission Class B.
 	-National Electrical Manufacturers Association DC-3


TEMPERATURE RATINGS:

	-Operating Range: 40°F to 100°F (4°C to 43°C).
	-Setpoint Range:  45°F to 88°F (7°C to 31°C).

HUMIDITY RATINGS:

	-Operating Range:  5 to 90% RH, noncondensing.
	-Setting Range:  Cooling: 40 to 80% RH.
	-Heating:  10 to 80% RH.

DIMENSIONS, APPROXIMATE:

	-6-3/8 in. (162 mm) wide, 4 in. (102 mm) high, 1-5/8 in. (41 mm) deep.

MOUNTING:

	-Without remote sensor: mounts directly on the wall, in living space, using 
	mounting screws and anchors provided.
	-With remote sensor: mounts directly on the wall, in a closet or other 
    convenient location, using mounting screws and anchors provided.

For much more information about Honeywell's PC8900 see the Owner's Manual/Installation Guide