ETI NETCOM ADH Assembly Replacement Procedure page 2

MODEL ADH
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.
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.
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.
ADH NETCOM HUMIDITY SENSOR ASSEMBLY
REPLACEMENT PROCEDURE
This procedure addresses the removal and replacement of
the Humidity Sensor Assembly in either an ADH NETCOM
Automatic Air Dehydrator with AC power or with Redundant
DC power. 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.
QTY. PART NO. DESCRIPTION
1
1
TOOLS REQUIRED
The following tools are needed to perform this procedure:
• Small flat blade screwdriver
• Tubing wrench or vacuum tube pliers
• Diagonal Cutters
NOTE :
On AC units, it might be useful to move the power filter
module and switch assembly out of the way for better access
to the humidity sensor during this procedure. Refer to Figure
1a. To do so, from the inside of the machine, after first noting
their placement, carefully disconnect the three electrical
leads from the filter module. Do not separate the leads from
the spade lugs. Then, from the back of the machine, unscrew
the two screws securing the power filter module to the
machine chassis then gently push the power filter module
toward the back of the dehydrator. It is not necessary to fully
remove the power filter module.
HUMIDITY SENSOR ASSEMBLY REPLACEMENT PROCEDURE | PART NO.
2
HUMIDITY SENSOR ASSEMBLY
REPLACEMENT PROCEDURE
23368 Humidity Sensor Assembly
24104 Instruction Manual (this document)
24104 REV B.0