Carnes HXHCH Installation Manual

CARNES COMPANY 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: [phone] Fax: [phone] www.carnes.com

COPYRIGHT © 2013 CARNES COMPANY

ALL RIGHTS RESERVED

SUPERSEDES 16820 16820-A

SPECIFICATIONS

INSTALLATION

The Model HXHCH is designed to be mounted in a duct to provide a means of sensing relative humidity. The humidistat uses a
monolithic sensor. The humidistat is designed to be mounted with the holes horizontal. Setpoint range is from 0 to 100% R. H.
Ambient operating conditions are from 0° to 85°C. The humidistat may be mounted in a return duct to provide a means of
sensing and controlling relative humidity. The humidistat may be mounted in a supply duct a minimum of 10 feet downstream
from the steam distributor pipe when used as a high limit humidistat.

Remove any excess insulation from the duct that would prevent the
probe from extending a minimim of 4” (106mm) into the air stream.

Make a 1-1/2” (38mm) hole in the duct for inserting the probe.
Use a gasket, sealer, or other means to seal the area between the

unit and the duct to ensure proper operation.
Make connections using No. 18 AWG wire.

All wiring connections must be made in accordance with the
National Electrical Code and all local regulations.

Avoid running control wiring near high voltage primary wires.

IP [English] Dimensions

Metric (SI) In Parentheses

SPECIFICATIONS AND INSTALLATION

MODEL HXHCH

DUCT HUMIDISTAT, PROPORTIONAL CONTROL

2-1/4”

(57mm)

5-3/4”

(146mm)

4-1/2”

(114mm)

2-13/16”
(71mm)

Snap-on
plastic
cover

Aluminum housing

DUCT

Allen screws

Use Allen wrench
to unlock cover

1-1/4” (32mm)

DUCT MOUNT WIRING DIAGRAM

WHEN USED AS HIGH LIMIT HUMIDISTAT

DUCT MOUNT WIRING DIAGRAM

WHEN USED AS ROOM HUMIDITY CONTROL

J16

J17