To Charge Batteries - Matco Tools BWC230 Instruction Manual

BATTERY SIZE
Ampere Hours
Reserve Capacity
Cold Cranking Amps
STATE OF CHARGE
Specific Gravity
Open Circuit Voltage-6 V.
Open Circuit Voltage-12 V.
Open Circuit Voltage-24 V.
ASSEMBLY INSTRUCTIONS
20.
Attach the handle to the charger
using the four screws provided.
OPERATING
21.
INSTRUCTIONS
:
CAUTION
This battery
charger must be fully assembled
before operating. Failure to do so
may result in risk of injury.
USE OF INSTRUMENT PANEL:
The CHARGE TIME timer has an OFF
position, a CONTINUOUS CHARGE
position and a timed charge range
from 0 to 120 minutes.
a. OFF - Always make sure the
timer is in the OFF position be-
fore connecting or disconnecting
the clamps from the battery. The
charger will not charge with the
timer in this position.
b. CONTINUOUS CHARGE - This
position is used for slow charging
or parallel charging and will not turn the charger off. Do not use this
position for fast charging.
c. 0 to 120 MINUTES TIMED CHARGE - The timer will automatically
turn the charger off at the end of the pre-set charging time. Turn the
timer past 20 before setting the desired time.

TO CHARGE BATTERIES

a. Make connections to the battery per the instructions in previous sec-
tions of this manual. Determine if the battery is 6 or 12 volts and
then set the CHARGE VOLTAGE switch to 6V/12LO for a 6 or 12
volt battery.
b. Turn the timer on and read the AMPERES meter.
c. If a higher rate of charge is desired for charging 12 volt batteries, set
the CHARGE VOLTAGE switch to the 12VAGM or 12HI position.
d. DO NOT charge a 6 volt battery at a setting other than 6V/12LO
(damage may occur to the battery).
e. Set the timer to the desired minutes charge.
f. Length of charge should be per the above chart and instructions.
When charging an AGM battery, the charge should be terminat-
ed between 14.7 to 15.0V.
12V CRANKING ASSIST
a. Turn off all the lights and accessories in the stalled vehicle.
b. Connect the charger to the battery per previous instructions.
c. Set the CHARGE VOLTAGE switch to the 12HI position.
d. Charge the battery on 12HI for at least five minutes. Make sure the
battery is accepting current before setting charger to 12V START.
027-1057 Rev. 20190312
BATTERY CHARGER
6 VOLT 70 AMP/12 VOLT 60 AMP
BATTERY SIZE TABLE
SMALL MEDIUM
<40 <75
<85 <130
<500
<800
STATE OF CHARGE TABLE
75% 50% 25%
1.225 1.185 1.140
6.2 6.05 5.95
12.4 12.1 11.9
24.8 24.2 23.8
CHARGE RATE Vs. MINUTES CHARGE
LARGE
BATTERY SIZE %CHARGE
>75
>130
0-25 0-25
SMALL 25-50 25-50
>800
50-75 50-75
0-25 0-25
DEAD
MEDIUM 25-50 25-50
<1.110
50-75 50-75
<5.9
0-25 0-25
<11.8
LARGE 25-50 25-50
<23.6 50-75 50-75
e. Set the switch in the 12V START position. Start the vehicle with the
charger connected to the battery.
NOTE: Do not crank the engine more than 20 seconds in any five
minute period; excessive cranking may overheat and damage the
starter.
DO NOT USE THE 12V START POSITION TO CHARGE
BATTERIES.
f. If the vehicle fails to start, return the CHARGE VOLTAGE switch to
the 12HI position.
g. While waiting for the starter to cool, allow the charger to continue to
charge the battery.
h. Turn the timer to the OFF position before disconnecting the clamps.
CHARGING SULFATED BATTERIES
If your battery has sat in the discharged state for an extended period of
time, it can become SULFATED. This usually is seen as a white deposit
near the top of the battery. The sulfate is formed when a battery with low
water levels remains discharged for an extended time. Sulfated batteries
exhibit the characteristic of accepting no charge regardless of the rate of
charge.
The charging method is two staged. The first stage of attempting to break
down the sulfating to allow the battery to accept a charge must be closely
watched to avoid excessive charge rates as the battery begins to charge
and overheat. The second stage is a slow charging to restore the battery
to full charge.
READ AND FOLLOW ALL PRECAUTIONS AND WARNINGS IN YOUR
INSTRUCTION MANUAL BEFORE ATTEMPTING TO CHARGE SUL-
FATED BATTERIES. FAILURE TO OBSERVE THESE WARNINGS MAY
RESULT IN PROPERTY DAMAGE, OR SERIOUS PERSONAL INJURY,
OR DEATH.
To recharge a sulfated battery:
a. Attach the battery clamps as described in the instruction manual.
b. Always use the charger's lowest rate when turning the charger on.
Set the charger to the charger's highest rate for the voltage of the
battery being charged.
CAUTION: NEVER CHARGE A BATTERY AT
VOLTAGE RATES ABOVE THAT OF THE BATTERY.
c. The battery will show little or no amperage at the start of the charging
process. This will continue until the sulfating begins to break down.
CAUTION: AS THE SULFATION BREAKS DOWN,
THE AMPERAGE MAY RAPIDLY RISE. CONSTANT
ATTENTION MUST BE OBSERVED TO PREVENT
SERIOUS OVERHEATING OF THE BATTERY.
d. Lower the charge rate to the lowest rate for the voltage of battery
being charged.
e. Charge the battery at this low rate until the electrolyte reaches the
fully charged state as described in the tables in your instruction man-
ual. This may take as long as two or three days.
3
BWC230
MINUTES
15 30 45 60 75 90
50 35 25 25 20 15
40 25 20 15 10 10
A
M
30 15 10 10 5 5
P
80 60 45 40 35 30
E
R
60 40 25 25 20 20
E
40 20 15 15 10 10
S
NA 70 55 50 45 45
NA 50 35 35 30 30
80 30 20 20 15 15
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