OPERATING INSTRUCTIONS

Model SF-1-12S is intended for use with 12 volt battery sys- tems only. The charger contains an electronic control circuit which safeguards against overcharging the battery.

After reading and following the directions "Charging battery in vehicle" or "Charging battery out of vehicle," you may observe the following conditions:

Light Color

On/Off

Condition

Green

Off

Check wall receptacle for

 

 

120 volts or check lead

 

 

connections, may be

 

 

reversed.

Green

On

AC Power is present.

Red

On

Battery charger voltage is

 

 

approximately 14 volts and

 

 

charging has stopped.

Red

Off

Battery voltage has

 

 

dropped one volt and the

 

 

charging has resumed.

 

 

 

The on/off cycle of the red light will continue, the red light will stay on for longer periods of time as the battery becomes more fully charged. Your charger has been designed NOT to spark if the ring lugs on the leads accidentally touch one another, or if the leads are connected in reverse.

The battery must measure at least 2 volts to start the charging of the battery. The green light will be on even if the charging is not taking place. You can verify charging by measuring the bat- tery voltage and noting an increase in volts.

This charger is ideally suited for maintaining the battery charge level for the following applications.

1.Storage of a battery during non-seasonal use.

2.For vehicles seldom used or placed in storage.

3.For improved battery performance during cold weather.

Smaller batteries such as those used on motorcycles and gar- den tractors can be charged overnight.

For large automotive or marine battery which are deeply dis- charged, it is recommended to recharge first with a larger charger (such as a 10 amp) then use the SF-1-12S to maintain the charge level of the battery.

If the battery is used in automobile or other application which has its own means of charging a battery, the above time maybe greatly reduced by partially charging the battery before apply- ing the charger.

CHARGING BATTERY IN VEHICLE

FOLLOW THESE STEPS WHEN BATTERY IS INSTALLED IN VEHICLE A SPARK NEAR BATTERY MAY CAUSE BATTERY EXPLOSION. TO REDUCE RISK OF SPARK NEAR BATTERY:

1.Position AC and DC cords to reduce risk of damage by hood, door or moving parts.

2.Stay clear of fan blades, belts, pulleys and other parts that can cause injury.

3.Check polarity of battery posts. POSITIVE (+) battery post usually has a larger diameter than the NEGATIVE (-) post.

4.Determine which post of battery is grounded (connected to the chassis). If negative post is grounded to chassis, as in

most vehicles, see item 5. If positive post is grounded to chassis, see item 6.

5.For common negative grounded vehicle, connect positive (red) terminal from battery charger to positive (+) ungrounded post of the battery. Connect negative (-) ring terminal to the vehicle chassis or engine block away from battery as far as the leads will permit. Do not connect ring terminal to the carburetor, fuel lines, or sheet metal body parts. Connect to a heavy gauge metal part of the frame or engine block or the negative post.

6.For positive grounded vehicle, connect negative (blk) ring terminal from the battery charger to the NEG (-) ungrounded battery post. Connect POS (+) red ring terminal to the vehicle chassis or engine block or the POS battery post. DO NOT connect the ring terminal to the carburetor, fuel lines, or sheet metal body parts. Connect to a heavy gauge metal part of the frame or engine block.

7.Only after completing steps 1 through 6, plug the extension cord into grounded 120 volt 60 hertz outlet.

PROPER DISCONNECT PROCEDURE

1.Always unplug extension cord before doing anything else.

2.Disconnect the grounded clamp from the engine block, framework or battery.

3.Finally disconnect the remaining clamp from battery terminal post.

NOTE: When connected to an electrical source, the charger may hum or buzz. This is normal. Also, the charger is designed to get quite warm. Do not set on flammable material.

CHARGING BATTERY OUT OF VEHICLE

For some applications you may need to purchase a terminal similar to that shown in figure 5 to make connections.

Figure 5

Check polarity of battery posts. POS (+) usually is the larger diameter than NEG (-) post. Connect POS (+) red lead ring ter- minal to positive post of the battery. Position yourself away from the battery as far as possible, then connect NEG (-) blk lead ring terminal to the negative (-) post of the battery. DO NOT face battery when making final connection.

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

CHARGER OVERLOAD PROTECTION

Your battery charger is protected from power overload by an automatic heat sensing switch. The protector will open with a clicking sound and reclose after a brief cooling period.

MAINTENANCE AND CLEANING

Very little maintenance is required. As with any appliance or tool, a few common sense rules will prolong the life of your battery charger.

Store in a clean, dry place.

Clean case and cords with a dry or slightly damp cloth.

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Schumacher SF-1-12S owner manual Operating Instructions