Carnes HXAAF User 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 16818 16818-A

SPECIFICATIONS

This air flow switch is installed in the
duct to prevent humidifier operation
when air flow is not occurring. This
switch provides a positive and economi­cal method to detect loss of air flow
velocity. The switch may be installed on
the side, top, or bottom of a horizontal
duct. Installation can be made in a
vertical duct if the air flow is upward. A
horizontal flow velocity of 480 fpm or
upward vertical flow of 910 fpm is
required to operate the switch.

LOCATION

Wherever possible, the air flow switch should be installed in a
horizontal duct. Avoid downstream locations too close to
elbows, dampers, fans, or other areas of excessive turbulence.

Avoid running control wiring near high voltage primary wires.

ADJUSTMENT

The adjustment screw is factory set for minimum flow velocities.
To obtain higher velocities before the switch is actuated, turn
adjusting screw in clockwise direction.

Adjusting
Screw

3-13/16”

(97mm)

3-7/16”

(87mm)

1-19/32”

(40mm)

1-19/32”

(40mm)

7-23/32”

(196mm)

7-5/16”

(186mm)

3/16”

Dia.

Holes

(5mm)

SPECIFICATIONS AND INSTALLATION

MODEL HXAAF

AIR FLOW SWITCH, VELOCITY TYPE

IP [English] Dimensions

SI (Metric) In Parentheses

FLOW FLOW

CLOSES OPENS

COMMON CIRCUIT CIRCUIT

1

1

2

2

3

3

COMMON

NORMALLY

OPEN

NORMALLY

CLOSED

To J18 Pin 2

To J18 Pin 1

INSTALLATION

2-1/8”

(54mm)

4-3/8”

(111mm)

1-29/32”

(48mm)

1-29/32”

(48mm)

AIR FLOW SWITCH WIRING

J18