Description
The VAV Zone Controller system consists of an intelligent LCD thermostat, and a remote termination module for mounting onto the VAV/VVT unit. The thermostat has an LCD display with four pushbuttons for setpoint and occupancy override, and contains a variety of configurable VAV/VVT algorithms. Each termination module comes complete with a damper actuator, optional flow sensor and housing.

Application

The DZNT VAV product line is suitable for controlling

nearly all basic VAV, fan powered VAV or VVT

sequences with choices of 3-stage digital reheat, tri-

state with 2nd stage digital reheat, or analog with 2nd

stage digital reheat.

Some of the advanced features include auto heat/cool

changeover, digital time clock or motion sensor input,

timed overrides for occupancy handling, and config

urable reverse acting digital reheat stages.

Consult the application guide for complete list of algo

rithms.

Features

—Native BACnet™ firmware
—BACnet MS/TP communications —Microprocessor based LCD thermostat with setpoint

and occupancy override control
—Field configured VAV or VVT algorithms —Application database can be downloaded over the

network
—Controller firmware can be flash loaded over the

network
—Simple air balancing and commissioning with the

thermostat keypad
—Quick connection between termination board and

thermostat, and between termination boards

via standard CAT3 or higher (CAT5, CAT5e, CAT6)

cable with RJ45 termination
—Easy-to-mount housing with damper assembly —True differential pressure sensor for VAV models —Reliable, industry standard actuator
—Service port 

Specifications

BACnet Device Profile
BACnet Application Specific Controller (B-ASC)

Combined Power Requirements

24 VAC 47-63 Hz

15 VA not including output loading

Wiring Class Class 2

Technology
32-bit processor with internal A/D, Flash memory and RAM

LCD
3-value and various icons (96 total segments)

Push Buttons
4 stylized momentary push buttons

Inputs
Temperature Sensor: Thermostat ± 0.36 °F from 32 - 158°F
(± 0.2 °C from 0 - 70°C)

Differential pressure 0-1” H2O airflow sensor(VAV models)

10kΩ Dry contact input

Optional actuator feedback sensor

Outputs
2 - 24 VAC for tri-state damper 1 - 24 VAC for fan

DZTM-x104D
3 - 24 VAC for external powered reheat

DZTM-x104T
2 - 24 VAC for Tri-state reheat
1 - 24 VAC for internal powered reheat

DZTM-x112A
1 - 0-10 VDC for analog reheat
1 - 24 VAC for internal powered reheat