VVT Zone Controller 21Wiring specificationsCable from sensor to controller: If <100 ft (30.5 meters) 22 AWG, unshieldedIf >100 ft (30.5 meters) 22 AWG, shieldedMaximum length: 500 feet (152 meters)Wiring equipment to outputsUse the following wiring diagrams to wire zone terminal equipment to the VVT Zone Controller's outputs.Single duct (page 22)Single duct 2-position hot water (page 23)Single duct modulating hot water (page 23)Single duct combination baseboard and ducted heat (page 24)Single duct 2-stage electric heat (page 24)Fan box 2-position hot water (page 25)Fan box modulating hot water (page 25)Fan box combination base board and ducted heat (page 26)Fan box 2-stage electric heat (page 26)Disconnect electrical power to the VVT Zone Controller before wiring it. Failure to follow this warning couldcause electrical shock, personal injury, or damage to the controller.Wiring specificationsTo size output wiring, consider the following:• Total loop distance from the power supply to the controller, and then to the controlled deviceNOTE 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
