Document Edition 1.6
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INSTALLATION GUIDE
Delta Network Thermostat: BACstat II
DNT-T221 (Rev 2.2)
Document Edition 1.6
Product Description
The DNT-T221 is an intelligent room thermostat with a custom 3-
value, 96 segment, LCD display. The DNT-T221 has the ability to
communicate on Delta’s proprietary LINKnet network or directly on an
BACnet MS/TP network.
It is capable of displaying a wide range of digital or analog values,
including setpoints, temperature, air flow, heating and cooling status,
fan speed, valve and damper position, and more.
When connected on a BACnet MS/TP network the DNT-T221
functions as an independent BACnet thermostat. When connected to a
Delta Controller on a LINKnet network it provides programmable
remote sensor and expanded I/O capabilities.
Contents
MODEL NUMBERS & ACCESSORIES............................................................................ 2
PACKAGE CONTENTS ...................................................................................................... 2
OTHER RELEVANT DOCUMENTS................................................................................. 2
PRODUCT SPECIFICATIONS .......................................................................................... 2
BOARD LAYOUT................................................................................................................. 4
JUMPERS .............................................................................................................................. 5
MOUNTING .......................................................................................................................... 5
WIRING DIAGRAM ............................................................................................................ 6
POWER.................................................................................................................................. 7
NETWORK CABLING & REQUIREMENTS .................................................................. 7
NETWORK TOPOLOGY.................................................................................................... 8
CAUTIONS & WARNINGS ................................................................................................ 9
COMPLIANCE DECLARATIONS .................................................................................... 9
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