Carrier TruVu VVTZC-E2 Installation And Startup Manual page 42

Wiring inputs and outputs
#33ZCT55CO2
Wire the sensor to the controller. See appropriate diagram below.
1
Install a field supplied 250 Ohm 1/4 watt 2% tolerance resistor across the controller's IN-01 and Gnd
2
terminals.
Wiring diagram for #33ZCT55CO2:
TruVu™ VVTZC-E2
Installation and Start-up Guide
36
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