Simplex, Inc., 5300 Rising Moon Road, Spring
fi
eld, IL 62711-6228 • 217-483-1600 • Fax 217-483-1616
Lbdman8p.indd (04/11) • © 2011 Simplex, Inc. All Rights Reserved. • Printed in the USA. • www.simplexdirect.com
LOAD BANK MANUAL • LBD Series • page 7 of 16
LOAD DUMP
Most Load Banks contain a Load Dump
feature which de-energizes all applied
load when customer supplied contacts
open. Normally closed to run, they
should be rated at 10A @ 120VAC.
When these contacts open all applied
load will be de-energized and the load
section will be disabled. If desired, the
customer may install automatic transfer
switch contacts, a manual push-button
or circuit breaker for this use. If Load
Dump is not desired, the installer must
jumper the contacts.
COOLING FAILURE
SUBSYSTEM
Excessive exhaust temperature is indi-
cated by the illumination of the “Over
Temperature” lamp. All load steps are
locked out until the problem is corrected
and failure related relays are reset. The
Cooling Failure Subsystem consists of
the the Exhaust Temperature Switch
(EXTS) and the Over Temperature
Relay (OTR). An exhaust temperature
above 295° F will close the EXTS and
energize the OTR. OTR contacts 7–4
will close and 7–1 will open. Closed
OTR contacts 7–4 will illuminate the
“Over Temperature” lamp. Open OTR
contacts 7–1 will interrupt the power
path to the “Normal Operation” lamp
and the Master Load switch. The failure
must be corrected and the system must
be reset by turning the Load Bank “Off”
then “On” before load can be reapplied.
MAINTENANCE
The Load Bank has been designed
to require minimum maintenance. All
components have been chosen for a
long, reliable life. Two basic intervals
of maintenance are required: each op-
eration and every 50 hours or 6 months
(whichever comes
fi
rst).
If a failure occurs the corre-
sponding status indicator will
be present and the load will be
de-energized. Before reapply-
ing a load, the failure must be
corrected and the system must
be reset by turning the Load
Bank “Off” then “On”.
For continued safety and for
maximum equipment protec-
tion, always replace fuses with
one of equal rating only.
EACH OPERATION
The air intake openings, cooling cham-
ber, and exhaust screens and louvers
must be checked for any obstructions or
foreign objects. Due to the high volume
of air circulated, paper and other items
Always remove all power from
the load bus and all fan/control
power before servicing the Load
Bank. Never operate or service
a Load Bank that is not properly
connected to an earthground.