DZNT-x112A

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, tristate 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 configurable reverse acting digital reheat stages.

Consult the application guide for complete list of algorithms.

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

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

Actuator

Siemens

44 in-lb. (nominal torque)

Belimo

35 in-lb. (nominal torque)

Device Type

Subnet

Communications

BACnet MS/TP @ 9600, 19200, 38400 or 76800 bps (default)

Note: maximum of 50 devices per BACnet MS/TP segment without a repeater or up to 99 devices, with a DZNR-768 repeater

Device Addressing

Set via keypad

Connectors

Removable screw-type terminal connectors for I/O

RJ45 quick connect between thermostat and termination board, and between termination boards Tubing (VAV Models)

Flow sensor tubing must be 3/16” (5 mm) inside diameter

Ambient

32° to 131°F (0° to 55°C)

10 - 90% RH (non-condensing)

Dimensions

Thermostat

5 x 3.25 x 1.25 in. (11.4 x 7 x 2.5 cm)

0.1 lb. (50 g)

Termination Board

9.37 x 4.71 x 1 in (12.7 x 8.3 x 2.5 cm)

0.55 lb. (250 g.) with housing

Compliance

CE

FCC

Listings

UL 916

Tags:
Categories:
  • VAV/VVT Network Thermostats (DZNT)