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Installation (for reference only)
Note: Since changes occur, always refer to installation and connection documentation from the
manufacturer and follow their procedures.
All type 2800−XXX controls are identified by a specific component number which follows the format
2800−XXX where the X's are replaced by numbers and letters indicative of the A−C supply line voltage
and frequency, contact configuration and enclosure. Each control has a data label on the right hand side
of the terminal block. In addition, each enclosed control has another data label on the outside of the
enclosure cover.
Mount the control on a vertical surface with the transformer on the left hand side and accomplish all
indicated wiring. Terminals on the control are numbered and are in the same relative position as the
terminals shown on the wiring diagram.
Terminal pair 1 −2 must be continuously energized from an A−C supply line of electrical characteristics
shown on the data label. Contacts must be wired into the electrical load circuit(s) of the warning devices
as required. Each contact used for load duty must be wired in series with the load and that series branch
circuit connected across a power source compatible with the load.
Wiring must be provided from the moisture detector sensor probe leads W1 and W2 to terminals 9 and 10
of the 2800−XXX control. Control leads should not be installed in the same conduit as power leads.
Induced voltage can cause false moisture signals.
Contact Operation
Normally open load contacts close and normally closed load contacts open when the sensor probes
detect the influx of moisture within the motor.
Test Procedure
A normally closed pushbutton and neon indicating lamp are provided as means of checking the moisture
sensing components. When the pushbutton is depressed, the indicating lamp will be illuminated to
indicate (A) power is supplied to the control, (B) the control is operative, and (C) wiring to the moisture
sensing probes in the motor is intact. This procedure should be performed periodically to confirm integrity
of circuit. Signal devices The signal device may be audible (bell, buzzer, horn or siren) or visible
(incandescent or neon lamp) or both − a signal device of your choice may be obtained from your local
electrical supply house.
Signal Devices
The signal device may be audible (bell, buzzer, horn or siren) or visible (incandescent or neon lamp) or
both − a signal device of your choice may be obtained from your local electrical supply house.
System Operation
It is recommended that upon indication (by warning light, etc.,) of outer seal failure that the motor be
removed from the installation and the oil and outer seal be replaced as soon as possible. If reconditioning
is not performed within a 30 day period it is recommended that the inner seal be thoroughly inspected and
replaced if required.
MN414
Installation & Operation 2−5
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