Schumacher DY-1420 User Manual

452.83 Kb

Owner's Manual


Charger DY-1420



Important Safety Instructions

Read Rules for Safe Operation and Instructions Carefully

Working in the vicinity of a lead-acid battery is dangerous. Batteries generate explosive gases during normal battery operation. For this reason, it is of utmost importance that each time before using your charger, you read this manual and follow the instructions exactly.

WARNING: Handling the cord on this product or cords associated with accessories old with this product, may exposed you to lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.



1.Before you use your battery charger, be sure to read all instructions and cautions printed on:

Battery Charger


Vehicle or unit using battery

2.Use battery charger on LEAD ACID type rechargeable batteries only, such as used in autos, trucks, tractors, airplanes, vans, RV's, trolling motors, etc. Charger is not intended to supply power to low-voltage electrical system other than in an automotive application.

WARNING: Do not use battery charger for charging dry-cell batteries that are commonly used with home appliances. These batteries may burst and cause injury to persons and damage to property.

3.Useonlyattachmentsrecommendedorsoldbymanufacturer. Use of non-recommended attachments may result in fire, electric shock, or injury.

4.When disconnecting the battery charger, pull by the plug not by the cord. Pulling on the cord may cause damage to cord or plug.

5.Locate battery power cord so it cannot be stepped on, tripped over, or subjected to damage or stress.

6.Do not operate charger with damaged cord or plug. Have cord replaced immediately.

7.Do not operate charger if it has received a sharp blow, been dropped, or otherwise damaged in any way. Take it to a qualified professional for inspection and repair.

8.Donotdisassemblecharger.Takeittoaqualifiedprofessional when service or repair is required. Incorrect reassembly may result in electric shock or fire.

9.To reduce risk of electric shock, unplug charger from outlet before attempting any maintenance or cleaning.

10.Do not use an extension cord unless absolutely necessary.

Use of an improper extension cord could result in fire or electric shock. If an extension cord must be used, make sure that:

Pins on plug of extension cord are the same number, size, and shape as those of the plug on the charger.

Extension cord is properly wired and in good electrical condition.

Wire size is large enough forAC ampere rating of charger, as specified below:

Length of cord (feet):





        AWG size of cord:





(American Wire Gauge)

11.Always charge battery in a well ventilated area.

NEVER operate in a closed-in or restricted area without adequate ventilation because of risk of explosive gases. WARNING: Risk of explosive gas.

12.Locate charger as far away from battery as DC charger cables permit.

13.Do not expose charger to rain or snow.

14.NEVER charge a frozen battery. If battery fluid (electrolyte) is frozen, bring into a warm area to thaw before charging.

15.NEVER allow battery acid to drip on charger when reading specific gravity or filling battery.

16.NEVER set a battery on top of charger.

17.NEVER place charger directly above battery being charged.

Gases from battery will corrode and damage charger.

18.NEVER touch the battery clips together when the charger is energized.





1.WARNING: Wear complete eye protection and clothing protection, when working with lead-acid batteries.

2.Make sure someone is within range of your voice or close enough to come to your aid when you work with or near a lead-acid battery.

3.Have plenty of fresh water and soap nearby for use if battery acid contacts skin, clothing, or eyes. If battery acid contacts skin or clothing, wash immediately with soap and water.

4.Avoid touching your eyes while working with a battery. Acid particles (corrosion) may get into your eyes! If acid enters your eye, immediately flood eye with running cold water for at least 10 minutes. Get medical attention immediately.

5.Remove all personal metal items such as rings, bracelets, necklaces, and watches when working with a lead-acid

battery. A lead-acid battery can produce a short-circuit current high enough to weld a ring (or the like) to metal, causing a severe burn.

6.Take care not to drop a metal tool or other metal onto the battery. Metal may cause sparking or short circuit the battery or another electrical devise. Sparking may cause an explosion.

7.Always operate battery charger in an open well ventilated area.

8.NEVER smoke or allow a spark or flame in the vicinity of the battery or engine. Batteries generate explosive gases!



Charger should be grounded to reduce the risk of electric shock. Charger is equipped with an electric cord having an equipment grounding conductor and a grounding plug. The plug must be plugged into an outlet that is properly installed and grounded in accordance with all local codes and ordinances. This battery charger is designed for use on a nominal 120 volt circuit and has a grounded plug that looks like the plug illustrated in

FIGURE 1 (A). This plug should be used in a grounded outlet. The plug pins must fit the receptacle (outlet).

ADAPTER:Atemporary adapter, as shown in FIGURE 1 (B) and (C), may be used to connect the charger plug to a two pole receptacle (outlet), as shown in FIGURE 1 (B).

NOTE: The temporary adapter should be used only until a properly grounded outlet can be installed by a qualified electrician.




DANGER: Never alter the AC cord or plug provided. If it will not fit outlet, have a proper outlet installed by a qualified electrician. Improper connection can result in a risk of an electrical shock. DANGER: Before using an adapter, as illustrated, be certain that the center screw of the outlet plate is grounded.

The green-colored rigid ear or lug extending from the adapter must be connected to a properly grounded outlet. Make certain it is grounded. If necessary, replace original outlet cover plate screw with a longer screw that will secure adapter ear or lug to outlet cover plate and make ground connection to grounded outlet.


"Use of adapter plug not allowed in Canada"





1.Make sure you have a 12 volt lead-acid battery and select appropriate battery charger switch.

2.Clean battery terminals. Take care to keep corrosion from coming in contact with your eyes.

3.If required, add distilled water in each cell until battery acid reaches levels specified by battery manufacturer. This helps purge excessive gas from cells. Do not overfill. For a battery without cell caps, carefully follow manufacturer's recharging instructions.

4.Study all battery manufacturer's specific precautions, such as removing or not removing cell caps while charging, and recommended rates of charge.

5.Be sure area around battery is well ventilated while battery is being charged. Gas can be forcefully blown away by using a piece of cardboard or other non-metallic material as a fan.

6.If necessary to remove battery from vehicle to charge, always remove grounded terminal from battery first. Make sure all accessories in the vehicle are off, so as not to cause an arc.

7.A marine (boat) battery must be removed and charged on shore. To charge it on board requires equipment specially designed for marine use.



Never place charger directly above the battery being charged, gases from battery could damage the charger.

Never allow battery acid to drip on the charger when reading specific gravity of filling battery.

Never operate charger in a closed in area, or restrict ventilation in any way.

Do not set battery on top of the charger.


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