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W180 ZONE CONTROL SYSTEM

W180 Zone Control System Overview

This manual presents application information and in-

stallation, checkout, and troubleshooting procedures for the
W180 Zone Control System (W180 System) (Fig. 1). The
W180 System is used to optimize comfort and energy
savings in a variety of residential and light commercial
applications.

The W180 System:
— Can operate with the Honeywell TotalHome

Sys-

tem (versions 1.14 and greater), providing remote
access and control for the homeowner. W180 Pro-
files and settings can change automatically with
TotalHome

Modes.

— Can control different types of HVAC equipment (for

example, radiant hydronic heating and air condition-
ing) as well as multiple sets of equipment (for ex-
ample, four air conditioning units and four furnaces).

— Allows central control with the easy-to-use S321A

Touchpad.

— Allows multiple S321A Touchpads to be located

throughout the house or building for convenient
operation.

— Supports a maximum of three Touchpads with the dc

power supply provided by the W180A Controller.

— Allows unique and personalized names to be defined

for each zone.

— Allows user to individually adjust settings in each zone.
— Has user-definable, system-wide Temperature Pro-

files for quick, easy control and adjustments.

— Permits separate temperature setpoints (for each zone)

for any Temperature Profile.

— Allows PC interface for configuration and monitoring.
— Supports a wide variety of sensors, modulating damp-

ers, 2-position valves, and HVAC equipment.

— Permits a maximum of 16 zones for heating only or

cooling only, or a maximum of 10 zones for heating
and cooling for each W180A Controller, depending
on the equipment used.

— Accommodates virtually any HVAC configuration

and provides the following zoned or individual room
temperature control:
• Damper zoning.
• Hydronic valve zoning.
• Equipment zoning.
• Combination of damper, hydronic valve, and equip-

ment zoning.

• Mixture of various HVAC systems.

— Does not require bypass dampers.

— Offers programmable HVAC equipment protection:

• Minimum air flow maintained via minimum duct

area(for dampered forced air systems with stan-
dard induction blower motors).

• Temperature setpoint limits (range boundaries).
• Damper position tracking (with optional end

switches and once-per-day position calibration).

• Minimum equipment off-time setting.
• Heat-to-cool switchover delay.
• Fan overrun periods.

The W180 System is customized for each specific appli-

cation using a Microsoft

Windows™-based PC setup

program.

NOTE: The W180 System air distribution algorithm adjusts

dampers to maintain a minimum airflow through each
piece of controlled equipment. This algorithm is de-
signed to work with all standard induction blower mo-
tors. If other blower motor types are used, alternate
bypass damper strategies must be used.

NOTE: When the W180 System is used in conventional

forced air systems, a return air temperature limit (for
example, T675A) is required as a backup for high tem-
perature limit.

See the Hardware Required section for a list of equip-

ment used in the W180 Zone Control System. For basic
information on HVAC systems, see Appendix C: HVAC
System Basics.

Fig. 1—W180 Zone Control System block
diagram.

W180A

CONTROLLER

S321

TOUCHPAD

PC FOR

CONFIGURATION

DAMPERS