US Switch Mode BATTERY CHARGER For lead-acid batteries 2-90 Ah MULTI US 3300 User’s Manual and a guide to professional battery charging For Starter/Deep Cycle batteries
INTRODUCTION The MULTI US 3300 is a primary switch mode battery charger with pulse maintenance. The MULTI US 3300 is designed to offer maximum life for the battery. MULTI US 3300 is a member of a family of professional chargers from CTEK SWEDEN AB. It represents the state-of-the-art of today’s technology for battery charging. Please read these operating instructions carefully before operating the MULTI US 3300. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
11. WARNING - RISK OF EXPLOSIVE GASES a) BATTERIES GENERATE EXPLOSIVE GASES DURING NORMAL BATTERY OPERATION. FOR THIS REASON, IT IS OF THE UTMOST IMPORTANCE THAT EACH TIME BEFORE USING YOUR CHARGER, YOU READ THIS MANUAL AND FOLLOW THE INSTRUCTIONS CAREFULLY. b) Follow these instructions and those published by the battery manufacturer and the manufacturer of any equipment you intend to use in vicinity of battery. 12.
13. PREPARING TO CHARGE a) b) c) d) e) f) 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. Be sure area around battery is well ventilated while battery is being charged. Gas can be forcefully blown away by fanning the area with a piece of cardboard or other non-metallic material. Clean battery terminals. Be careful to keep corrosion from coming in contact with eyes.
b) c) d) e) f) g) h) Stay clear of fan blades, belts, pulleys, and other parts that can cause injury to persons. Check polarity of battery terminals. POSITIVE (POS, P, +) battery post usually has larger diameter than NEGATIVE (NEG, N, -) post. Determine which post of battery is grounded (connected) to the chassis. If negative post is grounded to the chassis (as in most vehicles) see (e). If positive post is grounded to the chassis, see (f). Negative-grounded vehicle. Charger connection. 1.
e) f) Do not face the battery when making the final connection. When disconnecting charger, disconnect in reverse sequence from connecting procedure. See operating instructions for charge information. The battery charger must be connected to the battery according to the instructions above. IMPORTANT SAFETY INFORMATION! The MULTI US 3300 cannot be used to restore a fully worn out battery.
4. Charging a battery grounded to the positive terminal: Positive grounded vehicle Charger connection. 1. Connect negative charger clip (black) to negative battery terminal. 2. Connect positive charger clip (red) to a good metal engine ground away from the battery. Do not connect clip to fuel lines or sheet-metal body parts. 3. Connect the AC cord to the socket. The red alarm indication light will indicate a battery which is connected to reverse polarity.
6. If the indicator for charge and maintenance charge are flashing alternately, this may have the following causes: • Interruption of the charging process because a cable has become loose or because the battery is not conducting. • The battery is sulphated. If the indicator flashes for more than 30 minutes the battery may be defective and should be replaced. • If the flashing signal is flashing at intervals of more than 10 seconds, then there is a high self discharge of the battery, indicating a bad battery.
CHARGING CYCLE MULTI US 3300 operates in a three step fully automatic cycle IUoUp. It starts the charging with an almost constant current (0.8A or 3.3A) until maximum voltage (14.4V or 14.7V) is reached. At this point the charger switches to constant voltage, and the current supply to the battery is gradually reduced. If the current drops to 0.4 A, the charger switches to pulse maintenance. If the battery is charged and the terminal voltage of the battery falls to 12.
BULK CHARGING TIME The table shows the duration of the Bulk stepup to about 80% state of charge. The time for the Absorption should be added. Battery size (Ah) Mode Time (h) 2 8 14 50 2-3 8-10 3-4 12-14 90 23-26 INDICATORS Incorrect polarity. Charging process Charging completed. Pulse maintenance. Standby / Power on. Charger ready to use, please select charging function.
Voltage AC Current Back Current Drain* Charging Voltage Ripple** Charging Current Ambient Temperature Cooling Charger type Type of batteries Battery Capacity Dimensions Enclosure Weight TECHNICAL DATA 85-125 VAC, 50-60 Hz. Output power is reduced at lower input voltage. A perfect charge will still be achieved. 1.1 A rms 1.3 mA Nominal: 12 V 14.4/14.7V Max 50 mV rms, max 0.13 A. 0.8/3.3 A max - 20°C till + 50°C. Automatic reduction of power at increased ambient temperature. Natural convection.
OVERHEATING PROTECTION The MULTI US 3300 is equipped with overheating protection. In high ambient temperatures the output power is reduced. Do not cover the charger. BATTERY CABLES MULTI US 3300 is equipped with a set of battery cabels with battery terminal clips and one set of battery cable with eyelet terminals. MAINTENANCE The MULTI US 3300 is maintenance-free. The charger must not be opened; doing so will invalidate the warranty.
