Battery Tender Heavy Duty DVD-40 Modified 12V-12V Dual 12V @ 20A (PN 021-1158-12) - Manual (Page 3)

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system. If the negative (neg, n, -) post is connected to the vehicle chassis,
then the vehicle has a negative ground system. Negative ground systems
are the most common.
3. Connect the AC power plug to the 120 VAC electrical service outlet. Then
follow the normal start up procedures for the BATTERY TENDER®
HEAVY DUTY 12V-12V DUAL 20 AMP CHARGER.
WARNING
POSITIVE & NEGATIVE VEHICLE GROUND SYSTEMS:
1. If the positive (pos, p, +) battery post is connected to the vehicle chassis,
then the vehicle has a positive ground system. If the negative (neg, n, -)
battery post is connected to the vehicle chassis, then the vehicle has a
negative ground system. Negative ground systems are the most common.
2. For negative ground systems, connect the positive (red) alligator clip, or
ring terminal to the positive battery post. Then connect the negative
(black) alligator clip to the negative battery post. You may also connect
the negative (black) alligator clip to the vehicle chassis, but DO NOT make
the negative charger alligator clip connection to the carburetor, fuel lines,
or thin, sheet metal parts. Make that connection to the engine block or a
heavy gauge metal part of the frame.
3. For positive ground systems, connect the negative (black) alligator clip
to the negative battery post. Then connect the positive (red) alligator clip
to the positive battery post. If you prefer, you may also connect the
positive (red) alligator clip to the vehicle chassis, but DO NOT make the
positive (red) charger alligator clip connection to the carburetor, fuel lines,
or thin, sheet metal parts. Make that connection to the engine block or a
heavy gauge metal part of the frame. Then connect the positive (red)
alligator clip, or ring terminal to the vehicle chassis. Do not make the
positive charger clip or ring connection to the carburetor, fuel lines, or thin,
sheet metal parts. Make that connection to the engine block or a heavy
gauge metal part of the frame.
WARNING
USING
UNGROUNDED
AC 120 VAC
SERVICE
OUTLETS:
Figure 2
1. FOR USE ONLY IN T HE UNITED STATES, THE USE OF A 3 TO 2
PRONG GROUND ADAPTER PLUG IS NOT ALLOWED IN CANADA.
Your battery charger is designed for use on a nominal 120-volt circuit. It
comes equipped with a grounding plug that looks like the one illustrated in
Figure 2A. A temporary adaptor (Figure 2C), may be used to connect this
plug to a two-pole receptacle as shown in Figure 2B 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.
2. DANGER - Before using the adapter as illustrated, be certain that the
center screw of outlet plate is grounded. The green-colored rigid ear or lug
extending from the adapter must be connected to a properly grounded
ADAPTER
METAL
SCREW
COVER
OF GROUNDED
OUTLET BOX
GROUNDING PIN
(A)
GROUNDED OUTLET
(B) (C)
GROUNDING
MEANS
ADAPTER
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outlet - make certain that it is grounded. If necessary, replace original
outlet cover plate with a longer screw that will secure adapter ear or lug to
outlet cover plate and make ground connection to a grounded outlet.
ADDITIONAL CHARGER INFORMATION
AUTOMATIC CHARGING AND BATTERY STATUS
MONITORING:
The BATTERY TENDER® HEAVY DUTY 12V-12V
DUAL 20 AMP CHARGER is completely automatic and may be left
connected to both AC power and to the battery that it is charging for long
periods of time. However, it is prudent to periodically check both the battery
and the charger for normal operation during these extended charging periods.
The
BATTERY TENDER® HEAVY DUTY 12V-12V DUAL 20 AMP
CHARGER has status lights that indicate the operating mode of the charger,
and the condition of the battery that is connected to the charger. The charger
output power, voltage, and current all depend on the charge algorithm and the
condition of the battery that is being charged. The continuity of the AC power
that is connected to the charger is also a significant factor.
WARNING
BATTERY CONNECTION OR AC POWER INTERRUPTED:
1. If the battery connection to either charger output channel is interrupted,
then the output of that channel will be shut off. However, as long as AC
power is not interrupted, the program selection will remain the same as it
was prior to the connection being interrupted.
2. If the AC power to the charger is interrupted then the output of both
channels will revert to the default Flooded battery type.
The charger operates in one of the 4 primary charge modes: the BULK mode
(full charge power, constant current, increasing battery voltage, battery is 0%
to 75% or 80% charged), the ABSORPTION mode (high constant voltage,
decreasing current, battery is 75% to 100% charged), the EQUALIZATION
mode (higher constant voltage, with lower current limit), or the STORAGE /
FLOAT MAINTENANCE mode (low constant voltage, minimal charge current,
battery is fully charged, typically 100% to 103%).
SPECIAL FEATURES: The BATTERY TENDER® HEAVY DUTY
12V-12V DUAL 20 AMP CHARGER has the following special features:
SPARKPROOF: The battery charger DC output alligator clips must be
connected to a battery before any output voltage is developed.
SHORT CIRCUIT PROTECTION: The battery charger can sustain a
short circuit connection directly across its DC output terminals indefinitely
without any risk of either electric shock or excessive heat.
REVERSE POLARITY PROTECTION: The battery charger is
protected internally against any damage due to the DC output leads being
connected to the opposite polarity battery post. No damage will result to either
the battery or the battery charger.
TIME REQUIRED TO CHARGE A BATTERY: