Programming Guide

VAV-SVP01A-EN 25
VAV Start Up/Check Out Procedure
Auxiliary Duct Temperature Sensor
The typical mounting position of the auxiliary sensor is upstream of the VAV unit and connected
into the DDC controller at TB3-5 and TB3-6. Comm5 could be mounted downstream of the reheat
for improved diagnostics (Figure 8, p. 25). Refer to Controller Diagrams Figure 2, p. 17 and
Figure 3, p. 18 for the VAV VV550 Controller terminal locations.
Binary Input Wiring
Each VAV VV550 Controller provides one binary input. On the VV550 factory-installed controller, the
binary input configuration is set up at the factory. The binary input can be configured with Rover
service tool as occupancy or generic or not used. The input associates 0 Vac with open contacts and
24VAC with closed contacts. It is activated by a dry contact switch closure.
• Must be 14 to 18 AWG.
•Refer to Figure 2, p. 17 and Figure 3, p. 18 and the sensor instructions for terminal connections.
Occupancy Binary Input. The occupancy binary input can be configured as NO or NC. Occupied
is the normal state. It is also the initial state at power-up and after a reset. Unoccupied is the other
state. If the binary input is configured as generic, the default occupancy mode is occupied.
Generic Binary Input. The generic binary input can be configured as NO or NC. Normal state is
inactive and is also the initial state at power-up and after a reset. Active is the other state.
Not Used Input. When no device is connected to the input, configure the controller input as not
used.
Binary Outputs Wiring
Binary outputs that are required for unit operation are factory wired and commissioned.
Figure 8. Duct temperature sensors: upstream/downstream