iWorx® VAV Series
8
502-011, Effective: March 16, 2011
© 2011 Taco Electronic Solutions, Inc.
Grounding the Device
The ground terminal (T10) must be securely connected to earth ground, and T9 must be connected to T10
using a jumper wire. Failure to properly ground this equipment may increase the risk of electrical shock
and the possibility of interference to radio/TV reception, and will decrease the reliability of the device’s sen-
sor readings.
Connecting the device commons (COM) to earth ground will also connect the power source to earth
ground.
WIRING INFORMATION
WARNING
: Terminals 9, 14, 17, and 20 are connected internally on all Terminal Unit Controller controllers.
Disconnect
ALL
power sources when installing or servicing this equipment to prevent electrical shock or
equipment damage.
Figure 2: VAV Series Terminal Connections
Connecting Input Devices
Thermostat (STAT)
Connect one wire of a TS300 Series sensor to the STAT (T15) terminal. Connect the other wire to the adjacent com-
mon (T14).
Discharge Air Temperature (DAT)
To connect the discharge air thermistor to the unit, attach one wire from the thermistor to DAT (T16) and the other wire
to the adjacent common (T17). The thermistor used must be 10K Precon Type III.
