Carnes HXHAA User Manual

Humidifiers

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Humidifiers | Residential Humidifier Accessories

CARNES STEAM HUMIDIFIERS are available with a complete selection of

accessories to provide accurate humidity control.

WALL HUMIDISTAT, ON-OFF CONTROL

Mount this humidistat four or five feet above the floor in
freely circulating air of the temperature and humidity about
average for the entire space to be controlled. Avoid locations
near hot or cold air ducts and discharge air from the
humidifier. Scale range is from 10-90% RH. Differential is
5% non-adjustable. Case dimensions are 4-3/8” high, 2-7/8”
wide and 1-5/8” deep including control knob.

Model HXHAA

DUCT HUMIDISTAT, ON-OFF CONTROL

This duct mounted humidistat is installed in the return
air duct to sense the humidity level in the area being
served. Scale range is 15-50% RH. Differential is 4-6%
non-adjustable. Case dimensions are 3-3/4” high and 2-3/8”
wide. The humidistat projects 2-1/2” outside of the duct and
extends 7-1/2” into the duct.

Model HXHAB

WALL HUMIDISTAT, PROPORTIONAL CONTROL

The wall mounted HXHCG humidistat uses a special sensor
and electronic circuit to modulate the output of the
humidifier. The humidistat automatically adjusts the
humidifier output to match the humidity requirements. This
humidistat has a concealed set-point adjustment with a
locking cover. Set-point range is from 10-90% RH. Case
dimensions are 4-1/2” high, 2-13/16” wide and 1-1/4” deep.

Model HXHCG

Model HXHCH

The model HXHCH can be mounted in either the return
air duct when used to sense the humidity in the area being
served or in the supply duct a minimum of 10 feet
downstream of the steam distributor pipe when used as a
high limit control. Set-point range is 10-90% RH. Case
dimensions are 4-1/2” high and 2-13/16” wide. The
humidistat projects 3-1/2” outside of the duct and extends
5-3/4” into the duct.

DUCT HUMIDISTAT OR HIGH LIMIT,
PROPORTIONAL CONTROL

WALL HUMIDISTAT, PROPORTIONAL CONTROL

The Model HXHAM is a wall-mounted, microprocessor­controlled humidistat solution for cutting edge humidity
control. The HXHAM employs a backlit LCD module, which
displays both the ambient temperature and humidity of the
surrounding air. The embedded software allows user
navigation between temperature/humidity viewing mode and
set-point adjustment mode and also outdoor temperature
and humidity viewing mode. Set-point range is 0 to 100%.
An optional outdoor temperature compensation sensor can
be added (HXHAMT).

DUCT HUMIDISTAT, PROPORTIONAL CONTROL

The Model HXHAN is an intelligent humidistat solution used
exclusively for duct mounted installations. The humidistat
is capable of providing both humidity and temperature
measurements from inside the duct. The microprocessor
control takes the temperature into consideration when
calculating the humidity to provide an extra degree of
precision. 0 to 100% set-point range.

Model HXHAM

Model HXHAN

Humidifiers | Residential Humidifier Accessories

Humidifiers

G-32 www.carnes.com

AIR FLOW SWITCH, PRESSURE DIFFERENTIAL TYPE

Air flow in the duct may be sensed by using this pressure
differential switch. The differential in pressure between
the interior and exterior of the duct closes a switch
when air is moving. Air pressure differential as low as .07
w.g. may be sensed with this switch. Mounting plate
dimensions are 4-3/4” wide, 5-1/8 high. The switch
projects 4-3/8” outside the duct.

Model HXAAE

HIGH LIMIT HUMIDISTAT

The model HXHAD is available to reduce the potential of
condensation occurring in the supply duct. The control
must be mounted a minimum of 10 feet downstream of
the steam distributor pipe. Set-point range is 15-95% RH.
Differential is 5% non-adjustable. Mounting plate
dimensions are 6-1/2” wide, 4-3/4” high. The humidistat
projects 2-1/4” outside the duct and extends 1-1/4” into
the duct.

Model HXHAD

7/8”
(22)

3-1/4”

(83)

4-1/4”

(108)

OUTDOOR AIR TEMPERATURE COMPENSATED DIGITAL HUMIDISTAT, ON-OFF CONTROL

Model HXHAT

The HXHAT humidistat can be either wall or duct mounted and includes a remote outdoor temperature sensor for
exterior wall or intake duct mounting. The humidistat can automatically change the set-point in response to changes in
outdoor temperature or be set to maintain a set-point regardless of temperature changes. The LCD display shows
set-point RH%, actual RH% or outdoor temperature (from -9 to 98°F). Relay contacts provide an on/off signal to the
humidifier. Set-point range is from 30-65% RH. Default set-point is 40% RH.

The HXHAT will automatically reduce the RH set-point as the temperature drops below 35°F. The graph below shows
the RH setting of 35° RH and as the temperature drops the RH set-point is adjusted by the computer as shown. Below ­10° there is no adjustment.