Submittal Sheet

POWER
SOURCE
BLOWER
MOTOR
SEE WIRING (RIGHT)
FOR SPECIFIC
APPLICATIONS
Ensure power conductor to be monitored is disconnected and
locked out from the power source!
Install the removable mounting bracket to the back of the electrical
enclosure, if desired.
Snap the split core around the conductor to be monitored and
close until the core snaps shut.
NOTES:
To monitor current under .15 Amp see installation note.
Connect current switch output to switched load. (See diagrams to
the right).
Snap the APD back into the mounting bracket or allow the APD to
hang on the conductor.
Note: Contacts are solid state and work just like dry contacts.
When the switch is closed 1 Ohm is present. When the switch
is open more than 1 Megohm is present.
Reconnect power.
For currents less than .15 Amp:
To provide adequate current, wrap
the conductor through the center
hole and around the sensor body to
produce multiple passes and
increase measured current.
Measured current = Actual current
times the number of passes.
INSTALLATION
INSTALLATION NOTES
1.
2.
3.
4.
5.
6.
Model APD
Current Sensing Switch
SUBMITTAL SHEET
385 Hwy. 33 Englishtown, NJ 07726
Ph: 800-446-3110 - Fx: 732-446-5362
CONTROLS INC.
Excellence Without Compromise
P/N 090377A0122 REV. C Copyright © EWC Controls 2006 All Rights Reserved
E
W
C
WIRING
G1 R G2 H H
A
A
S2000 & S2020 Humidifier
Low Voltage Terminal Block
REMOVE
FACTORY
JUMPER
SEE S2000/S2020
INSTRUCTIONS
FOR WIRING
FOR AIR PROVING ON S2000/S2020
FOR FRESH AIR WITH ESR DAMPER
MODEL ND-ESR / URD-ESR
POWER OPEN / SPRING CLOSE
NO NC C M M
C
R
MODEL T40-VA
24 VAC
TRANSFORMER
FOR AIR PROVING ON BY-PASS
OR FLOW-THRU HUMIDIFIER
HUMIDISTAT
C
R
MODEL T40-VA
24 VAC
TRANSFORMER
HUMIDIFIER MOTOR
OR SOLENOID
SOURCE
LOAD
MODEL
APD
SOURCE
LOAD
MODEL
APD
SOURCE
LOAD
MODEL
APD
SOURCE
LOAD
Forced Air Zone Controls
P/N 090377A0122 REV. D 10/2011 Copyright © 2011, Field Controls Inc., All Rights Reserved
Field Controls Inc. 2630 Airport Road Kinston, NC 28504 PH: 252.522.3031 FAX: [phone]