ETI NETCOM ADH User manual

South Bend, Indiana USA | networketi.com ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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NETCOM
®MODEL ADH
AUTOMATIC AIR DEHYDRATOR WITH ETHERNET
ADH® NETCOM™ AUTOMATIC AIR DEHYDRATOR
DISCHARGE MANIFOLD WITH SAFETY RELIEF VALVE
REPLACEMENT PROCEDURE
Replacement Kit Part Number 24088
(for use in AC or Redundant DC Units)
Replacement Kit Part Number 24751
(for use in AC NEMA Units)
Document Part Number 24101

SAFETY INFORMATION AND WARNINGS
Abnormal Odor or Smoke
In the event of smoke or a burning or
abnormal odor, immediately interrupt
power to the ADH NETCOM with the
POWER switch at the rear of the unit,
unplug the unit, or turn off the circuit
breaker controlling the outlet. Note
that only the AC model of the ADH
NETCOM has an ON / OFF switch.
Lethal Voltages Present
Lethal voltages are present inside the
ADH NETCOM. Service should be
performed by qualified personnel
only. There are no user serviceable
components inside the chassis.
Pneumatics
Each of the air pumps inside the ADH
NETCOM automatic air dehydrator is
capable of generating as much as 24
psig (1,655mbar). Other attached dry
air sources may be capable of
generating even higher pressures.
Proper safety practice requires
treating all pneumatic components
with care. Always vent the system to
atmospheric pressure before servicing
pneumatic components.
Rack Mounting
Before and after rack mounting the
ADH NETCOM, ensure that the rack
is stable. Mounting of the ADH
NETCOM into a rack should be such
that a hazardous condition is not
created due to uneven mechanical
loading. Verify that adequate air
flow and power source capacity is
available to the unit. Ensure that the
ADH NETCOM maximum operating
temperature of 130°F (55°C) will not
be compromised by other
components in the rack. Ensure
reliable earthing of the ADH
NETCOM.
South Bend, Indiana USA | networketi.com ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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South Bend, Indiana USA | networketi.com ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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ADH NETCOM DISCHARGE MANIFOLD
WITH SAFETY RELIEF VALVE
REPLACEMENT PROCEDURE
This procedure addresses the removal and
replacement of the Discharge Manifold with
Safety Relief Valve in an ADH NETCOM
Automatic Air Dehydrator. The first section
addresses the replacement of the Discharge
Manifold in ADH NETCOM AC and DC units.
The second section, starting on page 7,
addresses the replacement of the Discharge
Manifold in an ADH NETCOM AC NEMA
unit.NE It is recommended to read the entire
procedure prior to beginning work.
INVENTORY LIST
Identify the following items in this kit prior to
beginning work.
TOOLS REQUIRED
The following tools are needed to perform
this procedure:
•Straight slot screwdriver
•1/2” / 9/16” open-end wrench
•Tubing wrench or vacuum tube pliers
•Pipe sealing tape or RTV
•Adjustable wrench
•Long screwdriver
Item
Number
Part
Number
Item
Quantity
Item
Description
1
23173
(AC/DC)
----- 23549
(AC NEMA)
1
Discharge Manifold with Safety Relief Valve
(for use in AC / Redundant DC units)
-----
Discharge Manifold with Safety Relief Valve
(for use in AC NEMA units)
2 2410 1 Instruction Manual (this document)

South Bend, Indiana USA | networketi.com ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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DISCHARGE MANIFOLD WITH SAFETY
RELIEF VALVE
REMOVAL AND REPLACEMENT
To replace a Discharge Manifold with Safety
Relief Valve (23173) in either an ADH
NETCOM Automatic Air Dehydrator with
AC power or an ADH NETCOM with
Redundant DC power, perform the steps
below. Refer to Figure 1. To replace a
Discharge Manifold (23549) in an ADH
NETCOM AC NEMA unit, proceed to page
7.
Figure 1. ADH NETCOM AUTOMATIC AIR
DEHYDRATOR DISCHARGE MANIFOLD
WITH SAFETY RELIEF VALVE.
Back wall of chassis.
Discharge Manifold
1. Shut off AC machine power by placing
power switch in the OFF (O) position,
then unplugging the power cord.
Shut off DC machine power by
shutting off the external power supply.
If possible, move the dehydrator to a
work table.
2. Remove the rear top machine panel.
Retain mounting hardware.
3. Using a tubing wrench or vacuum
tubing pliers, carefully remove from
the discharge manifold the upper air
hose to the pressure transducer. Refer
to Figure 2.
4. Using a tubing wrench or vacuum
tubing pliers, carefully disconnect
from the discharge manifold the lower
air hose coming from the humidity
sensor. Refer to Figure 2.
Figure 2. DISCHARGE MANIFOLD AIR
HOSES.
Hose to pressure
transducer. (step 3)
Hose from
humidity sensor.
(step 4)
SafetyS afety Relief

South Bend, Indiana USA | networketi.com ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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5. Remove and retain the external outlet
fitting. Refer to Figure 3. Make sure
to save the fitting for re-use during
installation.
6. Remove and retain the screws and
lock washers from above and below
the outlet fitting on the back of the
chassis. Refer to Figure 3.
Figure 3. DISCHARGE MANIFOLD
EXTERNAL COMPONENTS.
Remove
Fitting (step 5)
Remove
screws and
lock washers.
(step 6)
7. With the two air hoses disconnected
and the rear fitting and mounting
hardware removed, remove the
discharge manifold from the machine.
8. Two fittings are included as part of the
replacement kit. These should already
be assembled onto the new manifold.
If not, install the fittings onto the new
manifold as on the original assembly
and apply pipe sealing tape or RTV on
the threads for a more secure fit.
9. Insert the new discharge manifold into
the machine. While holding the
discharge manifold up against the
back wall of the chassis from inside the
machine, from the outside of the
chassis, install the screws and lock
washers from above and below the
fitting which were removed in step 6
and torque to 5 1/2 in/lb. Insert the
fitting receptacle through the back
hole of the chassis as on the original
manifold.
10. Connect the two air hoses removed in
steps 3 and 4 to the new discharge
manifold. Be sure to connect them the
same way they were connected to the
original manifold, with the lower hose
connecting to the pressure transducer
and the upper hose connecting from
the humidity sensor.
11. Reinstall the rear top panel using the
hardware removed in step 2.
12. Restore machine power.

South Bend, Indiana USA | networketi.com ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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To replace the Discharge Manifold (23549) in
an ADH NETCOM AC NEMA, perform the
steps below.
1. Shut off machine power by
unplugging the unit.
2. Open the two front door latches,
loosen the two captive screws in the
corners of the housing opposite the
hinges, then open the NEMA box.
Place an object underneath the door
once open to help support it during
this procedure.
3. Remove the orange ethernet cable on
the left by disconnecting both ends,
then removing it. Set aside for re-use.
Remove the power cable connector on
the right by loosening the captive
screw on each end of the green
connector, then unplugging the
connector. Disconnect the ground
wire by loosening the ground wire
retaining screw, then carefully
removing the ground wire. Refer to
Figure 1.
Figure 1. DISCONNECTING THE
ETHERNET CABLE,
THE POWER CABLE CONNECTOR, AND
THE GROUND WIRE.
Disconnect
both ends,
then remove
orange
ethernet cable.
Loosen both captive screws,
then disconnect connector.
Loosen
screw,
then
remove
ground
wire.
4. Remove and retain the four
mounting screws from the four
corners of the protective front cover,
then slowly lift the front cover,
carefully flip it over, then set it down,
upside down, to rest on the inside of
the enclosure door. Be careful as
there are still many wires connected
between the enclosure and the front
cover and there isn’t a lot of slack.
Note that the two upper front cover
mounting screws are located in plain
sight in the top corners of the front
cover, while the two lower front
cover corner mounting screws are
located down in the front “well” of
the unit. Use a long screwdriver to
remove them.
5. Note how the three air hoses are
connected to the existing discharge
manifold, then carefully disconnect
the hoses from the existing manifold.
Refer to Figure 2. The hose in the
middle of the back or top side of the
manifold runs from the humidity
sensor. The hose on the left side of
the manifold runs to the pressure
transducer. The hose on the front or
bottom of the manifold runs to the air
out fitting. These three hoses will be
connected to the new discharge
manifold in this same arrangement.

South Bend, Indiana USA | networketi.com ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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Figure 2. ADH NETCOM AC NEMA
DISCHARGE MANIFOLD.
6. Remove and retain the two screws and
lock washers securing the discharge
manifold to the chassis. With the three
air hoses disconnected and the
mounting hardware removed, take the
existing discharge manifold out of the
machine.
7. Two fittings are included as part of the
replacement kit. These should already
be assembled onto the new manifold.
If not, install the fittings onto the new
manifold as on the original assembly.
To pressure
transducer
From humidity
sensor
To air out
fitting
Safety
Relief Valve
Carefully connect the air hoses to the
new discharge manifold as they had
been connected to the original
manifold. Refer back to Figure 2 on the
previous page. Connect the hose from
the humidity sensor to the fitting in the
middle of the back or top side of the
new discharge manifold. Connect the
hose to the pressure transducer to the
fitting on the left side of the new
discharge manifold. Connect the hose
to the air out fitting to the front or
bottom fitting of the new discharge
manifold. Make sure all hoses
connections are tight.
Reinstall the front cover removed in
step 4 of this section. If it was placed
upside down on the lid of the unit
during this procedure, carefully turn the
cover back over and work it back into
position, past the wires and other
components in the enclosure. Reinstall
the four corner screws securing the
front cover to the chassis.
Reconnect the ground wire by inserting
it behind the retaining screw from
which it was removed, then tighten the
ground wire retaining screw. Reconnect
the green power connector by holding
it in place then tightening the two
captive screws removed in step 3 of this
section. Reconnect both ends of the
orange ethernet cable removed in step
3 of this section. It does not matter
which end of the ethernet cable goes
into which receptacle.
With the ground wire, power connector
and ethernet cable reconnected, close
the lid of the NEMA enclosure and
secure the two latches opposite the
hinges. Secure the lid in place by
reinstalling the two captive screws in
the two outer corners of the lid.
Restore machine power by plugging
the unit back in.
Align the mounting holes of the new
discharge manifold with the Pem®
nuts in the floor of the chassis to which
the original discharge manifold had
been installed. Using the two screws
and lock washers retained in step 6 of
this section, install the new discharge
manifold where the original one had
been, securing the two screws into the
Pem® nuts embedded in the floor of
the chassis. Torque to 8 in/lb.
8.
9.
10.
11.
12.
13.

ADH INSTRUCTION MANUAL | PART NO.24101 REV B
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QUESTIONS AND COMMENTS
For technical help, questions, or
comments concerning this or any
ETI, Inc., product, contact the
Customer Service Department
between 8:00 a.m. and 5:00 p.m. EST.
DISCLAIMER
ETI, 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. ETI,
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 ETI, Inc. to notify any
person or organization of such
revisions, changes or improvements.
No part of this manual may be
reproduced or translated in any form or
by any means, electronic or mechanical
including photocopying and recording,
for any purpose without the express
written consent of ETI, Inc.
The ETI logo, We Manage Heat, and
ADH are registered trademarks of ETI,
Inc. NETCOM is a trademarknc. NETCOM is
Copyright © 2012 ETI, Inc. All rights
reserved.
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