® U.S. Registered Trademark
Copyright © 2020 Honeywell Inc. • All Rights Reserved 31-00362-01
Fig. 1. WEB-VA423B24N
TABLE OF CONTENTS
Trademark Information ........................................................ 1
Product description ............................................................... 1
Safety instructions ................................................................. 1
Dimensions ................................................................................ 2
Specifications ........................................................................... 3
Terminals .................................................................................... 4
Installation ................................................................................. 5
Piping ............................................................................................ 8
Power supply ............................................................................. 9
Wiring ............................................................................................ 9
Communication .................................................................... 10
Commissioning ..................................................................... 13
Operator interface LEDs ................................................... 14
Schematic Diagram ............................................................ 15
Typical VAV application – Example wiring ............... 16
Replacing actuator .............................................................. 17
Approvals, Certifications, etc. ......................................... 18
Related Technical Literature .......................................... 19
Appendix .................................................................................. 19
TRADEMARK INFORMATION
Sylk™ is a trademark of Honeywell International Inc.
BACnet®is a registered trademark of ASHRAE Inc.
PRODUCT DESCRIPTION
The WEB-VA423B24N controller is part of the
Honeywell WEBs Spyder Model 5 family. The
Honeywell Spyder Model 5 (WEB- VA423B24N)
family of unitary controllers provide flexible, freely
programmable, demand-led control that delivers
tangible benefits to reduce energy spends while
driving new levels of functionality and efficiency in
today’s buildings. These scalable and freely
programmable BACnet MS/TP-based unitary
controllers utilize smart engineering and
commissioning tools and Sylk™ bus technology.
Multiple flexible configurations can be achieved to
address specific applications.
WEB-VA423B24N and replacement parts are
described in Table 1 and Table 2 on pg.2.
SAFETY INSTRUCTIONS
• While performing any work (installation,
mounting, startup), all instructions given
by the manufacturer and the safety
instructions provided in this document
must be followed.
• The WEB-VA423B24N compact VAV
controller must be installed and mounted
only by authorized and trained personnel.
• If the unit is modified in any way, except by
the manufacturer, all warranties
concerning operation and safety become
invalid.
• Make sure that applicable local standards
and regulations are always observed.
• Use only Honeywell supplied or approved
accessories.
• Before the system is dismantled,
disconnect the power supply by either
removing the power terminal block from
the controller, or by means of local
isolation. Read the following caution note
carefully.
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