Humidifiers
www.carnes.com
G-21
Humidifiers | Accessories
DUCT HIGH LIMIT HUMIDISTAT, ON-OFF CONTROL
Model HXHAD
The Model HXHAD humidistat is available for use as a
safety precaution to prevent air in the duct from exceed-
ing a preset level. Do not use the humidistat in air that is
over 125°F or in locations where the unit could become
wet. The control must be mounted a minimum of 10
feet downstream of the distributor pipe. Scale range is
from 15%-95% RH Differential is 5% non-adjustable.
Mounting plate dimensions are 6-1/2” wide, 4-3/4” high.
Humidistat extends 1-1/4” into duct and projects 2-1/4”
outside the duct.
DUCT HUMIDISTAT OR HIGH LIMIT,
PROPORTIONAL CONTROL
DUCT HUMIDISTAT, ON-OFF CONTROL
Model HXHCH
The Model HXHCH is designed to be mounted in a duct
to provide a means of sensing relative humidity. Set-
point 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 mean of sensing
and controlling relative humidity. The humidistat may be
mounted in a supply duct a minimum of 10 feet down-
stream from the distributor pipe when used as a high
limit humidistat. Case dimensions are 2-13/16” x 4-1/2” x
2-1/4”. The probe extends 5-3/4” into the duct.
Model HXHAB
This duct mounted humidistat mounts in the return air
duct to provide control of the humidifier. The control
should be located in the duct where it will be affected
by normal air flow. The maximum temperature at the
nylon element must not exceed 125°F. The control can
be mounted in any position, but where possible locate it
on the side of the duct to make the set-point adjustment
easily accessible. Scale range is 15%-50% RH Differential
is 4%-6% non-adjustable. Humidistat is
UL
listed. Case
dimensions are 3-3/4” high, 2-3/8” wide. Humidistat
extends 7-1/2” into duct and projects 2-1/2” outside of
the duct.
