REX RF20SC Operation Manual

1. Never use boosters or other transformers for charging.

- This can damage the charger; always use with a 220V supply.

2. Never charge with an engine generator or DC power source..

- Do not use an engine generator or DC power source for charging. You can damage the charger.

3. Always charge indoors.

- When charging, do not let the storage battery or charger get wet; charge indoors.

- Do not place the charger close to an open flame.

- Keep all inflammable materials away from the charger.

- The battery or the charger may get a little hot when charging;
choose a dry and well-ventilated place that is not exposed to direct sunlight.

4. Moisture can cause accidents.

- Do not try to charge or use the product in the rain or in wet or damp places. In addition to weakening the

insulation of the charger or the motor, moisture can cause electric shock. Always avoid dampness.

5. Unplug the charger once the battery is charged.

- Remove the plug from the mains once charging is finished.
Also, if there is a power failure, always remove the plug from the mains..

6. Charge within a range of 0 to 40.

- This product employs a special charging circuit for fast charging (about 1 hour); always charge within a
temperature range of 0 to 40. Below 0, it may overcharge, shortening the life of the charger.
Above 50, charging may not be possible.

WARNING

Lithium-ion battery charger

RF20SC OPERATION MANUAL

To prevent short circuits, wrap the terminals on used lithium-ion batteries in insulating tape and dispose of
in accordance with local laws and regulations governing such items.

Be sure to read the operation manuals for the RF20SB, RF20SC, RF20S, RT20S
thoroughly before using the machine.
Keep the manuals where the operator can refer to them whenever necessary.

1)Safety Considerations

1. Precautions

WARNING

1. Use the tool only for its designated purpose.

- Using the tool for any purpose other than flaring/flanging pipes will not only damage the tool, and/or the motor,
but could also lead to accident or injury.

2. Ensure you use the correct voltage.

- Be sure to use the voltage indicated on the name plate of the main unit or in the operation manual.
Using a voltage different from that indicated can result in overheating, smoke or fire.

3. Avoid electric shocks.

- Do not touch the plug with wet hands.

- Do not use the tool in rain or in places where moisture can easily get into the tool.

4. Be aware of your surroundings and the conditions at the work site.

- Do not use the tool in rain, humid or damp places, or where moisture can easily get into it.
Humidity will lower insulation of the motor and cause electric shock.

- Do not use close to flammable fluids or gases, such as gasoline or paint thinner.
Doing so could result in accidents, fire or explosion.

5. In the following cases, turn the unit OFF and pull the plug out of the mains.

- When the tool is not in use or parts are being changed, repaired, cleaned or inspected.

- When accessories are changed.

- When hazards are expected (including electric power failure).
If the tool is plugged in, it may start up unexpectedly, causing an accident.

6. Handle the power cord with care.

- Do not carry the product by its cord, or tug on the cord to pull the plug out of the socket.

- Do not place the cord near heated objects, fats & oils, cutters and objects with sharp edges.

- Take care not to tread on the cord, pull it or apply unnecessary force resulting in damage to the cord.

2)Precautions in use

3)Specifications 4) Main parts

Table. 1

Model

Use

Size

(

WxDxH

)

Unit: Approx. 146x109x61mm˴
Power cord: 2m

Weight

Main unit: 335g / Power cord: 85g

Battery type

Lithium-ion battery

Voltage

AC220V㧔50㧛60Hz㧕60VA

Charging system

Constant current and constant
voltage system

Charging voltage

Charging current

10㧚8V

Operating temperature

0 40

2000mA

Circuit protector

Overcharge protection (4.25V/cell)

Overcurrent protection (7A fuse)

RF20SC

For charging REX lithium-ion battery
RF20SB (No. 424982)

7. Do not charge continuously with the same charger.

- If the same charger is used to charge a number of tools continuously, it could overheat and be damaged.
Once charging is finished, leave the charger to cool for about 15 minutes before charging again.

8. Do not immediately recharge a battery that has been used up quickly.

- A storage battery that has been exhausted quickly due to continuous operation becomes abnormally hot.
Therefore, when such a battery is placed in the charger, a red pilot lamp comes on, either preventing a recharge,
or resulting in an insufficient charge. Always charge the battery after it has cooled down.

9. Do not charge for more than 2 hours.

- If the pilot lamp stays on even after charging for 2 hours, the charger may be faulty. Stop charging and consult

your nearest distributor.

10. Keep the battery-mounting socket clean.

- The battery-mounting socket on the charger has charging terminals. If this socket is contaminated with metal chips,
water or other foreign bodies, the terminals may be short-circuited, causing damage to the charger.

11. Do not attempt to disassemble either the storage battery or the charger.

- The charger and the storage battery houses condensers and electronic parts.
Disassembly could result in electric shock or damage to the charger; never try to disassemble them!

12. Never short-circuit the charger.

- The lithium-ion battery used with this unit has an extremely low internal resistance. If short-circuited, there may be

a surge in the current, resulting in overheating, burns or damage to the battery.

13. Never put the storage battery in a fire.

- Never put the battery in a fire or an incinerator or it may explode.

14. Keep the ventilation hole on the charger clean.

- Keep the ventilation hole on the charger clear of metal chips and inflammable materials as they may cause electric
shock or damage. Avoid using the charger in dusty places.

15. Stop charging if any abnormality is detected.

- If you detect excessive heat or any other abnormality while charging, stop immediately and have the charger repaired.

16. Store the charger and battery correctly.

- Store the charger and the storage battery in a dry place out of the reach of children and where the temperature

does not exceed 40. Never store under the eaves of a house, for example, where rain might get in.

Deterioration of the electrical insulation can result in electric shock.

17. Charge once every three months.

- It is recommended that even if you do not use them, lithium-ion batteries should be charged about once every three
months in order to prevent over-discharge.

18. Do not store fully-charged lithium-ion batteries for long periods of time.

- If you need to store the battery for a long period of time, store at room temperature at about 50% of the battery's capacity.

WARNING

Fig. 1

Plug

Ventilation hole

Green lamp

Red lamp

Charger

Storage battery
mounting socket

Power cord