Honeywell Honeywell Thermostat perfect climate comfort center control system User's Manual

Honeywell Thermostats User's Manual - Honeywell Thermostat perfect climate comfort center control system.
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PRODUCT DATA

68-0173-3

® U.S. Registered Trademark
Copyright © 2001 Honeywell •  All Rights Reserved 

Perfect Climate Comfort Center™

Control System

GENERAL

This document contains information on the Perfect Climate 

Comfort Center™ Control System including components and 

accessories. Some components and accessories include the 

PC8900A Control Panel, W8900A-C Remote Module, 

C7189A Remote Indoor Sensor, C7089A Outdoor Sensor, 

C7100A Discharge Air Sensor, CO2 Monitor, CM8900A 

Communication Module, and W8735B Telephone Access 

Module.

The Comfort Center control system provides 24 Vac energy 

saving control for a heating and cooling system, while 

providing reliable and precise temperature, ventilation and 

humidity control.

FEATURES
The PC8900A mounts in the living space and accurately 

measures and controls room temperature and humidity.

• Only four wires required for installation.
• Large, continuously lit LCD.
• Seven-day (auto copy) programming.
• Simultaneous display of heat and cool setpoints.
• Keyboard lockout protection available.
• No batteries required, indefinite program retention.
• Circulation fan setting improves indoor air quality.
• Field configurable for:

— Automatic or manual changeover.

— °F or °C display.

— 12- or 24-hour clock.

— Adaptive Intelligent Recovery™ control or conven-

tional recovery.

— Humidity control in heating or cooling.

— Outdoor, remote, and discharge temperature sen-

sors available.

— Fan overrun in cooling.

— Ventilation control.

The W8900A-C mounts near the equipment. The 

PC8900A, heating, cooling, ventilation and 

dehumidification equipment and all additional sensors 

are wired to the W8900A-C.

• Compatible with most 24 Vac Systems.
• Remote sensor, discharge sensor, outdoor sensor and 

CO2 monitor available.

• Optional remote communications available.

PC8900A

W8900A-C

Contents

General .............................................................................

1

Features ...........................................................................

1

Specifications ....................................................................

2

Ordering Information  ........................................................

2

Installation ........................................................................

5

Wiring Diagrams  ...............................................................

9

   W8900A,C Hookup Diagrams  .......................................

9

   W8900B Hookup Diagrams  ........................................... 14

   W8900A,B,C Humidity Control Hookup Diagrams  ........ 18

Installer Setup ................................................................... 24

Programming PC8900A .................................................... 27

Checkout .......................................................................... 33

Operation .......................................................................... 34

Troubleshooting ................................................................ 40

Glossary ........................................................................... 44

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