Carrier RTU Open v3 User Manual

Installing the RTU Open
RTU Open v3 CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
34
Wiring a Humidistat
Locally Purchased
A humdistat may be used for zone humidity control (dehumidification) when applied to a Carrier rooftop unit
equipped with the Humidi-MiZer™ option. On units not equipped for dehumidification, the humidistat will indicate
a high humidity condition only.
NOTE
The humidistat is NOT an option for LC WeatherExpert™ units with gas heat. You must use the RH sensor
for humidity control.
Wiring specifications
Cable from sensor to controller: If <100 ft (30.5 meters) 22 AWG, unshielded
If >100 ft (30.5 meters) 22 AWG, shielded
Maximum length: 500 feet (152 meters)
To wire a humidistat to the controller
1 Strip the outer jacket from the cable for at least 4 inches (10.2 cm). Strip .25 inch (.6 cm) of insulation from
each wire
2 Wire the humidistat to the controller. See diagram below.
3 Apply power and verify sensor readings.
NOTE
Humidistat may be return duct or space mounted.

Carrier RTU Open v3 Specifications

General

Brand	Carrier
Model	RTU Open v3
Category	Controller
Language	English