Delta Controls DNT-T221 - User Manual

Document Edition 4.1 Page 1 of 41
A
PPLICATION
G
UIDE
Delta Network Thermostat: BACstat II
DNT-T103 & DNT-T221
Document Edition 4.1
Product Description
The DNT-T103 and the DNT-T221 are intelligent room thermostats with
custom 3-value, 96 segment, LCD displays. The DNT products can
communicate directly on a BACnet MS/TP network or Delta’s proprietary
LINKnet network.
They are 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-T103 and T221 function as independent BACnet
thermostats. When connected to a Controller on a LINKnet network they
provide programmable remote sensor and expanded I/O capabilities. This
version’s firmware can be flash loaded over the network, and have
termination resistors that are jumper selectable.
The DNT-T103 has 1 extra input, 3 binary outputs and a number of built-in application control strategies. The
DNT-T221 has 2 extra inputs, 2 analog and 1 binary output and built-in application control strategies. As a
result, these BACstats are capable of stand-alone control when directly connected on an MS/TP network.
Contents
OTHER RELEVANT DOCUMENTS .................................................................................................. 2
IMPORTANT
INFORMATION .......................................................................................................... 2
SETUP
& CONFIGURATION ............................................................................................................. 2
NETWORK COMMUNICATIONS ........................................................................................................... 2
D
EVICE CONFIGURATION (KEYPAD) .................................................................................................. 2
SERVICE TOOL MODE (KEYPAD) ....................................................................................................... 7
I
NPUT CALIBRATION .......................................................................................................................... 8
I
NPUT SCALE RANGES ...................................................................................................................... 8
SOFTWARE
& PROGRAMMING...................................................................................................... 9
OBJECTS............................................................................................................................................ 9
PROGRAMMING ............................................................................................................................... 12
CONTROL
FUNCTIONS ................................................................................................................... 12
O
VERVIEW ...................................................................................................................................... 12
SOFTWARE LOOP CONTROLLER ....................................................................................................... 15
SETPOINTS ...................................................................................................................................... 18
C
ONTROL DIAGRAM ........................................................................................................................ 19
CONTROL APPLICATIONS (MUX, VAV, VVT, HPU, FCU, RAD, HUM) ............................................ 20
O
UTP UT FUNCTIONS & TYPES ......................................................................................................... 28
OWS
FUNCTIONS .............................................................................................................................. 33
A
PPENDIX A: PROGRAMMING NOTES .................................................................................................... 31
A
PPENDIX B: LINKNET ......................................................................................................................... 32

Delta Controls DNT-T221 Specifications

General

Brand	Delta Controls
Model	DNT-T221
Category	Thermostat
Language	English

Summary

Product Description

Setup & Configuration

NETWORK COMMUNICATIONS

Details MS/TP network communication settings for BACstats.

DEVICE CONFIGURATION (KEYPAD)

Describes configuring BACstats via keypad, including menu access.

CONFIGURATION MENU USER ACCESS

Details user access and PIN entry for the Configuration Menu.

BUTTON & NAVIGATION FUNCTIONS

Explains button functions for navigating the Configuration Menu.

CONFIGURATION MENU OPTIONS

Lists and describes available options within the BACstat Configuration Menu.

SERVICE TOOL MODE (KEYPAD)

SERVICE TOOL MODE USER ACCESS & NAVIGATION

Explains how to access and navigate the Service Tool Mode.

SERVICE TOOL MENU OPTIONS

Details the options available within the Service Tool Mode menus.

INPUT CALIBRATION

MS;TP CONNECTION

Discusses input calibration for MS/TP connections.

INPUT SCALE RANGES

Software & Programming

OBJECTS

Lists predefined objects resident in BACstat II products accessible over the network.

Control Functions

OVERVIEW

CONTROL APPLICATIONS

Lists and describes the 7 possible application control strategies for BACstats.

ALGORITHM MODE

Algorithm Mode

BOX MODE (DNT-T103 AND DNT-T221 ONLY)

Box Mode

Software Controller Loop

GENERAL

CONTROLLER OPERATION

NORMAL CONTROLLER ACTION

RESET ACTION (RESET RATE IN REPEA TS PER HOUR)

SETPOINTS

Day Setpoint (AV6) - SEE

Explains the Day Setpoint and its adjustability via the keypad or OWS.

Day Minimum Setpoint (AV7) - LO

Day Maximum Setpoint (AV8) - H1

Day Differential (AV9) - d IF

CONTROL DIAGRAM

CONTROL APPLICATIONS

NONE (or MUX) - [Application (AV12) = 0]

VAV - [Application (AV12) = 1]

Details the VAV application for controlling VAV boxes with airflow measurement.

Setup Parameters

Sequence of Operation

VVT - [Application (AV12) = 2]

Details the VVT application for controlling VVT boxes with damper control.

HEAT PUMP UNIT (HPU) - [Application (AV12) = 3]

Describes the HPU application for single-stage heat pump control.

FAN COIL UNIT (FCU) - [Application (AV12) = 4]

Explains the FCU application for simple fan coil unit control.

Output Functions & Types

FUNCTIONS

Lists and describes output functions like MUX and Heating.

TYPES

Lists and describes various output types like Binary, PWM, Analog, Tri-State.

OWS Functions

DEVICE CONFIGURATION

Details essential configuration items for BACstats on an MS/TP network.

Configuration Settings

Control Settings

FAN CONTROL

Fan Control

APPENDIX A: Programming Notes

Programming Notes

Provides essential programming notes for GCL+ and BACstats.

CONFIGURATION VARIABLES (AV12 & AV21-23)

APPENDIX B: LINKnet

Configuration Menu Options

LINKnet Connection

Programming Notes (LINKnet)

COMMANDING VARIABLES