Connecting A Dat Sensor; Connecting A Dat Sensor; Connecting Power; Connecting Power - Nailor 35SW Manual

Connecting a DAT Sensor
The Discharge Air Temperature sensor is required for automatic changeover and for VAV terminal units with reheat.
Figure 2-5 Discharge air temperature sensor location
Connect a 10 kΩ, Type 3 thermistor temperature probe to the discharge air temperature input. The input includes the internal
pull-up resistor. An STE-1401 sensor is suitable for this application. Follow the instructions supplied with the sensor for installation,
or refer to pages 11-12 for this information.
• For DAT limiting and reheat, install the sensor in the airflow after the reheat section. See the topic, Advanced options on
page 21 to enable discharge air temperature control.
• When the DAT sensor is used only to detect primary air temperature, the sensor can be placed in either location shown in
the Figure Discharge air temperature sensor location.
Figure 2-6 Discharge air temperature input details
Connecting Power
The controllers require a 24 volt, AC power source. Use the following guidelines when choosing and wiring transformers to the
controller.
• A Class – 2 transformer is supplied with each unit.
Connect the 24 volt AC power supply to the power terminal block on the lower right side of the controller. Connect the ground
side of the transformer to the ground terminal and the AC phase to the phase terminal. Power is applied to the controller when
the transformer is connected to power.
Figure 2-7 Controller power terminals

Maintenance

Nailor EZvav controllers require no routine maintenance. If necessary, clean with a damp cloth and mild soap.
Date: 10-2016 Supersedes: 7-2016
Nailor reserves the right to change any information concerning product or specification without notice or obligation.
Installation and Operation Manual
DAT sensor
Changeover only
T
COMM
READY
AI1
GND
AO3
AO4
AI5
AI6
GND
AI7
SC
BO5
BO6
24 VAC
BO7
Class 2
SC
BO8
24VAC
Page 10 of 48
EZvav Digital Controls
●
DAT sensor
Preferred location
COMM
READY
AI1
GND
AO3
AO4
ON CTS
1 2
BACnet MS/TP
IOM-EZVAVINST