W180 Zone Control System Overview - Honeywell W180 User Manual

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
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.

W180 Zone Control System Overview

®
Sys-
— 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
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.
S321
HBUS
TOUCHPAD
S321
HBUS
TOUCHPAD
RS-232
PC FOR
CONFIGURATION
3
W180 ZONE CONTROL SYSTEM
®
Windows™-based PC setup
DAMPERS
VALVES
HIGH LIMIT
CONTROLLER
HVAC
W180A
EQUIPMENT
CONTROLLER
ROOM
SENSORS
OUTDOOR
SENSOR
HUMIDITY
SENSOR
M5536C
68-0139