ETI ADH-2A COM User manual

INSTALLATION MANUAL
23033 Rev. A 04/10 http://www.networketi.com Environmental Technology, Inc. Page 1 of 4
ADH®–2A COM
Procedure for replacing obsolete pump with
maintenance free, extended life compressor
Part Number 23031
Document Part Number 23033
DESCRIPTION
A maintenance-free, long life Hargraves compressor has been instituted as an
across the board replacement for the obsolete KNF pump in ADH–2A COM
Dehydrators. The advantages of the new compressor are:
• Brushless motor for long life and zero maintenance.
• Hargraves’ proprietary diaphragm material for longer life.
• Higher airflow at pressures above 2 PSI, similar airflow below 2 PSI.
• Smaller, lighter unit.
• More efficient design requires less power to operate.
This procedure documents the steps required to perform a field upgrade from the
old pump to the new brushless unit.
PACKING LIST
23031 Hargraves Compressor Pump, small (Qty. 1)
12522 Hex nut (Qty. 4)
10378 Washer (Qty. 4)
16979 Spacer (Qty. 4)
17082 Cable Tie (Qty. 1)
17369 Tie Wrap Mount (Qty. 1)
23033 ADH–2A COM Pump Replacement Manual
Environmental Technology, Inc.
1850 N Sheridan Street • South Bend, IN 46628
www.networketi.com • [email protected]

INSTALLATION MANUAL
23033 Rev. A 04/10 http://www.networketi.com Environmental Technology, Inc. Page 2 of 4
Step 1: Turn off unit and remove plug.
Step 2: Remove top cover.
For rack mount units, remove 12 screws.
For wall mount units, remove 10 screws.
Step 3: Unscrew and remove the red and black
wires. If wires cannot easily be removed from
ferrite core, cut cable tie and open core to remove
wires. Retain ferrite core for re-installation later in
this procedure.
Step 4: Disconnect tubing from solenoid barbed
fitting.
Step 5: Disconnect ground wire.
Step 6: Remove 4 mounting screws from the back
of the unit (secure pump with other hand). Set 4
mounting screws and lock washers aside for use in
re-installation.
Step 7: Remove screws, lock washers, and nuts
from second mounting position and replace them in
the holes where the original pump was located.
Step 8: Position Hargraves compressor over
mounting holes and attach with screws, spacers,
locking washers, and nuts.
Step 9: Route the red and black wires through
ferrite core, secure core with cable tie, then re-
install the core in its original location as shown
using the tie wrap mount.

INSTALLATION MANUAL
23033 Rev. A 04/10 http://www.networketi.com Environmental Technology, Inc. Page 3 of 4
Step 10: Insert red wire into Pin 2 of terminal.
Insert black wire into Pin 1 of terminal.
Step 11: Connect air line tubing to solenoid barbed
fitting.
Step 12: Reinstall cover.
Step 13: Reconnect power cord and turn on unit.
The new DC brushless pump is polarized. Failing to wire as
shown will damage the pump motor and can cause additional
damage to the dehydrator.
(1)(3)(4) (2)
Front of machine
Pins 1 and 3 are Ground.
Pins 2 and 4 are Positive.
(+) (GR) (+) (GR)
White dot on circuit board
Connect Red wire to Pin 2;
Connect Black wire to Pin 1. Detail for Step 10
Terminal Block TB1
TB1
TB1 label on circuit board

INSTALLATION MANUAL
23033 Rev. A 04/10 http://www.networketi.com Environmental Technology, Inc. Page 4 of 4
QUESTIONS AND COMMENTS
For technical help, questions, or comments concerning this or any Environmental
Technology, Inc. product, contact the Customer Service Department between
8:00 a.m. and 5:00 p.m. EST.
E-mail: [email protected]
DISCLAIMER
Environmental Technology, Inc. makes no representations or warranties, either
expressed or implied, with respect to the contents of this publication or the
products that it describes, and specifically disclaims any implied warranties of
merchantability or fitness for any particular purpose. Environmental Technology,
Inc. reserves the right to revise this publication, and to make changes and
improvements to the products described in this publication, without the obligation
of Environmental Technology, Inc. to notify any person or organization of such
revisions, changes or improvements.
The ETI logo, We Manage Heat and ADH are registered trademarks of Environmental Technology, Inc.
Copyright © 2010 Environmental Technology, Inc. All rights reserved.
Printed in USA PN23033 Rev A 4/10