Carrier VVT Zone II Installation And Startup Manual page 26

Installing the VVT Zone II
Wiring diagram for #33ZCSPTCO2:
#33ZCT55CO2
1
Wire the sensor to the controller. See appropriate diagram below.
2
Install a field supplied 250 Ohm 1/4 watt 2% tolerance resistor across the controller's RH/CO2 and Gnd
terminals.
3
Verify that the RH/CO2 jumper is set to 0-5Vdc on the VVT Zone II.
VVT Zone II Controller
Installation and Start-up Guide
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