Minuteman 957740 User Manual
36 VOLT AUTOMATIC
LOOK FOR THIS SYMBOL TO POINT OUT SAFETY PRECAUTIONS. IT MEANS:
BECOME ALERT—YOUR SAFETY IS INVOLVED.
IF YOU DO NOT FOLLOW THESE
BATTERY CHARGER
PART NO. 957740
Specifications
AC Input:
DC Output:
Connections:
PLEASE SAVE THESE IMPORTANT SAFETY AND OPERATING INSTRUCTIONS
For correct operation of the equipment, it is important to read and be familiar
with this entire manual before installing and operating the charger.
DO NOT DISCARD THIS MANUAL AFTER READING.
SAFETY INSTRUCTIONS, INJURY OR PROPERTY DAMAGE CAN OCCUR.
Patented electronic timer monitors battery state of charge while charging and automatically turns charger off as battery
•
reaches full charge
Compensates automatically for AC input line voltage variation by high reliability ferroresonant transformer design. Supply
•
voltage variation + 10% from nominal, +
with constant electrolyte temperature. No taps or rate controls to set.
Automatic decrease of charge rate for superior battery life through good equalization of cells and low water use rate.
•
Silicon diodes with inherent surge protection operated at a conservation percentage of their rating.
•
Convection-cooled design for maximum reliability and minimum maintenance.
•
108-128 Volts AC, 15 Amp, 60 Hertz, single-phase
36 Volts DC, 36 Amp
6- or 9-ft. AC input cord with NEMA 5-15 grounded plug
8½- or 10-ft. DC output cord with polarized connector
Features
1% maximum battery charger voltage variation, decreasing to + ½% at finish rate
INTRODUCTION
This automatic battery charger is designed to
recharge deep-cycle, lead-acid batteries. A
ferroresonant transformer is used to provide a highly
reliable, line compensating unit with a minimum of
moving parts, designed for long, trouble-free service.
A patented electronic timer turns the charger on and
off automatically. This electronic timer determines
full charge of the batteries by measuring the rate at
which the battery voltage increases during charge.
When the voltage stops rising, the battery is full
charged and the charger turns off.
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INITIAL INSTALLATION
The AC line to which the charger is to be connected
must be capable of supply 15 amperes to this
charger.
CAUTION: USE ONLY ON CIRCUITS
PROVIDED WITH A MAXIMUM OF 20 AMP
(15 AMP IN CANADA) BRANCH CIRCUIT
PROTECTION IN ACCORDANCE WITH THE
NATIONAL ELECTRICAL CODE ANSI/NFPA 70
AND ALL LOCAL CODES AND ORDINANCES.
IMPROPER CIRCUIT PROTECTION MAY RESULT
IN A FIRE.
The use of an extension cord with the charger
should be avoided. The use of an improper
extension cord could result in a risk of fire or electric
shock. If an extension cord must be used, use a
three-conductor, No. 14 AWG cord with ground,
properly wired, in good electrical condition and keep
it as short as possible. Make sure that the pins on
the plug of the extension cord are the same number,
size, and shape as that of the plug on the battery
charger. Locate all cords so that they will not be
stepped on, tripped over, or otherwise subjected to
damage or stress.
Do not operate this charge if it has received a sharp
blow, was dropped, or otherwise damaged in any
manner; refer to a qualified service agent.
Provide adequate ventilation for the batteries and
charger. The convection-cooled design requires an
unobstructed flow of cooling air for proper operation.
Keep all charger ventilation openings at least two
inches (2") (5cm) away from walls or other objects.
Do not allow clothing, blankets, or other material to
cover the charger.
WARNING: CHARGERS CAN IGNITE
FLAMMABLE MATERIALS AND VAPORS. DO
NOT USE NEAR FUELS, GRAIN DUST,
SOLVENTS, OR OTHER FLAMMABLES.
illustrated in Figures B and C, may be used to
connect this plug to a two-pole receptacle as shown
in Figure C if a properly grounded outlet is not
available. The temporary adapter should be used
only until a properly grounded outlet can be installed
by a qualified electrician. The green-colored rigid
ear or lug extending from the adapter must be
connected to a permanent ground such as a
properly grounded outlet box. Make sure that the
charger is connected to a receptacle having the
same configuration as the plug.
GROUNDING METHODS
NOTE: The use of the adapter shown in Figures B
and C is not permitted in Canada.
If a grounding type plug receptacle is not available,
do not use this charger until the proper outlet is
installed by a qualified electrician.
WARNING: TO REDUCE THE RISK OF AN
ELECTRIC SHOCK, KEEP CHARGER DRY. DO
NOT EXPOSE IT TO RAIN, POWER WASH
DETERGENTS, OR SPRAY. FOR STORAGE,
KEEP CHARGER IN A BUILDING.
ATTENTION! Ne pas exposer a la pluie.
GROUNDING INSTRUCTIONS
This battery charger must be grounded to reduce the
risk of electric shock. This charger is equipped with
an electric cord having an equipment-grounding
conductor and a grounding type plug. This plug
must be connected to an appropriate receptacle that
is properly installed and grounded in accordance
with the National Electrical Code and all local codes
and ordinances.
WARNING: IMPROPER CONNECTION OF
THE EQUIPMENT-GROUNDING CONDUCTOR
CAN RESULT IN A RISK OF ELECTRIC SHOCK.
The conductor with insulation having an outer
surface that is green, with or without yellow stripe(s),
is the equipment-grounding conductor. If repair or
replacement of the electric cord or plug is necessary,
do not connect the equipment-grounding connector
to a live terminal. Refer to a qualified service agent.
Battery chargers equipped with a grounding plug, as
illustrated in Figure A below, are for use on a
nominal 120-volt circuit. A temporary adapter, as
NORMAL OPERATION
The instructions printed on the charger are for
daily reference.
Output Polarity: WHITE, RED "+" POS.
BLACK "-" NEG.
CAUTION: USE CHARGER ONLY FOR
CHARGING 36-VOLT, 18-CELL SERIES
CONNECTED WET LEAD-ACID SYSTEM WITH A
CAPACITY OF 240 TO 370 AMPERE-HOURS (20
HR. RATE). OTHER TYPES OF BATTERIES MAY
BURST, CAUSING PERSONAL INJURY AND
DAMAGE.
ATTENTION! Utiliser pour charger
uniquement les accumulateurs au plomb à
electrolyte liquide. D'autres types d'accumulateurs pourraient éclater et causer des
blessures ou domages.
DANGER: RISK OF ELECTRIC SHOCK! DO
NOT TOUCH UNINSULATED PORTIONS OF THE
OUTPUT CONNECTOR OR UNINSULATED
BATTERY TERMINALS.
DANGER: Risque de chocks électriques. Ne
pas toucher les parties non isolées du
connecteur de sorti ou les bornes non isolées de
l'accumulateur.
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1. With the charger DC output cord disconnected
from the batteries, connect the input plug to a
properly grounded 120 volt, 60 Hertz outlet with
the same number and size pins as the plug.
WARNING: TO REDUCE THE RISK OF AN
ELECTRIC SHOCK, CONNECT ONLY TO A
PROPERLY GROUNDED SINGLE-PHASE (3WIRE) OUTLET. REFER TO GROUNDING
INSTRUCTIONS.
2. Connect the DC output plug to the battery
receptacle by grasping the plug body or handle
and pushing the plug straight into the receptacle.
The charger will turn on with an audible "click"
after a short delay if all circuits and a battery
voltage test good. The transformer will "hum"
and ammeter indicate initial charge rate.
WARNING: DO NOT DISCONNECT THE DC
OUTPUT CORD FROM THE BATTERY
RECEPTACLE WHEN THE CHARGER IS ON.
THE RESULTING ARCING AND BURNING WILL
DAMAGE THE CONTACTS AND COULD CAUSE
THE BATTERIES TO EXPLODE. DISCONNECT
THE AC POWER SUPPLY CORD TO TURN THE
CHARGER "OFF" BEFORE DISCONNECTING
THE OUTPUT PLUG.
3. Monitor the ammeter for the initial charge rate.
The initial charge rate will vary from 32 to 40
amperes, depending upon the condition of the
batteries and how much the batteries have been
discharged. Slight variations in the initial charge
rate may also result from AC input line voltages
which are higher or lower than nominal. Higher
line voltages increase the initial charge rate
while lower line voltages reduce the charge rate.
If the batteries are heavily discharged and the
AC input line voltage is higher than nominal, the
initial charge rate may exceed 40 amperes.
Under normal conditions, the charger rate will
taper to less than 40 amperes within 90 minutes.
If the ammeter still reads more than 40 amperes
after 90 minutes, turn the charger off by
disconnecting the power supply cord from its
outlet.
CAUTION: TO PREVENT BATTERY
DAMAGE, CHARGER OVERHEATING, AND
TRANSFORMER BURNOUT, DO NOT ALLOW
THE CHARGER TO OPERATE FOR MORE THAN
90 MINUTES WITH THE AMMETER READING IN
EXCESS OF 40 AMPS. THIS IS MISUSE AND
WILL CAUSE OVERHEATING AND TRANSFORMER WILL BURN OUT.
4. The charge rate will decrease to 6 to 10
amperes for the last few hours of charge if all
battery cells test good.
During charge, the battery voltage increases
gradually causing the charge rate to decrease.
Good battery cells should each rise to
approximately 2.5 volts DC causing the charge
rate to reduce to less than 10 amps. Each cell
accepts charge differently; normal charging with
the ammeter reading in the 6 to 10 amps area
for the last few hours of charge is important to
achieve equalization of all battery cells every
time the batteries are charged.
As batteries age, individual cells weaken
resulting in lower than normal finish charge
voltage. As the finish charge voltage decreases,
the finish charge rate increases and no longer
reduces into the 5 to 10 amps range on the
ammeter. The electronic timer still determines
when the batteries have reached their maximum
state of charge and turns the charger off. Even
though they are properly charged, older
batteries will gradually lose capacity, and should
be replaced when they will no longer perform as
required.
The charger turns off automatically when the
batteries reach full charge. The necessary
charge time is affected by numerous factors.
The major factors affecting the required charge
time are better amp-hour capacity, depth of
discharge, battery temperature, and if the
battery is new or broken in. The required charge
time varies with battery size and depth of
discharge. Allow sufficient time, as listed in the
following charge, for normal charging.
Battery Capacity Normal Charge Time
(Amp-hours, 20 hr. rate)
(Hours)
240 9-12
305 12-14
370 14-16
The normal charge times listed are for batteries
which have been discharged to 80% of their
rated capacity. As much as 4 ADDITIONAL
HOURS may be required to properly charge
batteries under the following conditions:
a. Heavily discharged batteries (more than
80% discharged).
b. Charging new batteries (batteries with less
than 50 discharge/charge cycles).
c. Charging cold batteries (ambient temper-
atures below 65°F). When charging new or
cold batteries, a higher than normal finishing
charge voltage can be expected. This
results in a low finish charge rate (2-5
amps), and additional time is required to
achieve equalization of all battery cells.
Refer to a qualified service agent if the
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