Wiring Equipment To The Vav Zone Ii's Outputs; Wiring Specifications - Carrier VAV Zone II Installation And Startup Manual

Wiring equipment to the VAV Zone II's outputs

Use the following wiring diagrams to wire zone terminal equipment to the VAV Zone II's outputs.
VAV Zone II Single Duct Controller or VAV Zone II Fan Terminal Controller
No heat - Single duct (page 28)
2-position hot water/steam heat - Single duct (ducted or baseboard) (page 29)
Modulating hot water/steam - Single duct (ducted or baseboard) (includes CV Modulating) (page 29)
Combination heat - Single duct (ducted electric heat with modulating baseboard heat) (page 30)
3-stage electric heat - Single duct (ducted or baseboard) (page 31)
SCR electric heat - Single duct (ducted or baseboard) (page 32)
VAV Zone II Fan Terminal Controller only
2-position hot water/steam - Fan box (ducted or baseboard) (page 33)
Modulating hot water/steam - Fan box (ducted or baseboard) (includes CV Modulating) (page 35)
Combination heat - Fan box (ducted electric heat with modulating baseboard heat) (page 36)
2-stage electric heat - Fan box (ducted or baseboard) (page 37)
SCR electric heat - Fan box (ducted or baseboard) (page 37)
Wiring a field-supplied high-torque actuator to the analog output (page 38)
WARNING Disconnect electrical power to the VAV Zone II before wiring it. Failure to follow this warning
could cause electrical shock, personal injury, or damage to the controller.

Wiring specifications

To size output wiring, consider the following:

Total loop distance from the power supply to the controller, and then to the controlled device
NOTE Include the total distance of actual wire. For 2-conductor wires, this is twice the cable length.

Acceptable voltage drop in the wire from the controller to the controlled device

Resistance (Ohms) of the chosen wire gauge

Maximum current (Amps) the controlled device requires to operate
VAV Zone II Controllers
Installation and Start-up Guide
27
Installing the VAV Zone II
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