INSTRUCTION MANUAL
LOAD MANAGER 2
AUTOMATIC LOAD SHEDDING SYSTEM
File: IM_091-79-xx_reva.indd
Rev: A
Revised By: MFG
Date: 10-28-2013
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
MODEL #: 091-79
MODEL #: 091-79-24
3 YEAR WARRANTY
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Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com
INTRODUCTION
The 091-79-XX, Load Manager 2, is a device which continuously monitors the voltage of the battery.
The unit is eld adjustable to other voltages from factory settings. Two output relays are provided. The
output relays are capable of switching 30 amperes and both “normally open” and “normally closed”
contacts are provided.
INSTALLATION AND ADJUSTMENT
I. INSTALLATION OF THE LOAD MANAGER 2
Connect the Load Manager 2 to the battery and the loads as illustrated in gure 1. This is a typical
circuit; many other variations are possible. It is important to connect the Bat+ and Bat- terminals to
that point at which the voltage is to be sensed.
II. FIGURE 1, WIRING DIAGRAM
Note: Fuse size determined by Load Requirement, 30A Max.
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West Sayville, NY 11796
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Ph: 800-346-0857
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III. ADJUSTING OF THE LOAD MANAGER 2
The factory adjustment for the Load Manager 2 is for the rst relay to be energized. The 2nd relay
is energized at a voltage .5 volts lower than relay 1. No separate adjustment is provided for relay 2.
To readjust the setpoint, remove the 4 screws and lift off the cover. Connect a variable voltage source
to the battery input terminals and an ohmeter across the normally open contacts of relay 1. Vary
the input voltage to the point at which relay 1 just becomes energized. Turn the trimmer resistor
R100 slightly CCW to lower the setpoint or slightly CW to raise the setpoint. Check the new setting
to determine what voltage will cause the relay to be energized.
IV. FIGURE 2, VOLTAGE ADJUSTMENT
The circuit responds very slowly so allow ample time, 15 to 30 seconds for the
circuit to respond to voltage changes. This time delay is required to prevent the
relay from chattering for small changes in voltage around the setpoint.
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
CAUTION
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SPECIFICATIONS
Model
Number
Input
Voltage
(Vdc)
Input Relay
Deenergized
(Amps)
Input Relay
Energized
(Amps)
Relay
Contacts
(Amps)
Weight
091-79 10 to 15 .020 .20 30 .5
091-79-24 20 to 30 .020 .10 30 .5
OUTLINE DRAWING
(lbs)
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com
4
INSTALLATION RECORD
DATE INSTALLED _______________________________________________________
INSTALLED BY _________________________________________________________
VEHICLE IDENTIFICATION _______________________________________________
VEHICLE OWNER _______________________________________________________
WARRANTY POLICY
All products of Kussmaul Electronics are warranted to be free of defects of material
or workmanship. Liability is limited to repairing or replacing at our factory, without
charge, any material or defects which become apparent in normal use within 3
years from the date the equipment was shipped. Equipment is to be returned,
shipping charges prepaid and will be returned, after repair, shipping charges paid.
Kussmaul Electronics shall have no liability for damages of any kind to associated
equipment arising from the installation and/or use of the Kussmaul Electronics
products. The purchaser, by the acceptance of the equipment, assumes all liabil-
ity for any damages which may result from its installation, use or misuse, by the
purchaser, his or its employees or others.
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com
5
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