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.
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS – This manual contains
important safety and operating instructions for the MULTI US 3300 battery charger.
When charging, batteries can emit explosive gases, therefore it is essential
to prevent flames and sparks. The charger is designed for charging lead-acid
batteries from 2 to 90 Ah. Do not use for any other purpose.
Always provide good ventilation when charging.
Use of an attachment not recommended or sold by CTEK may result in a risk of
fire, electric shock or serious injury to persons.
To reduce risk of damage to electric plug and cord, pull by the plug rather than by
the cord when disconnecting charger.
An extension cord should not be used unless absolutely necessary. Use of an
improper extension cord could result in a risk of fire and electric shock. If extension
cord must be used, make sure that: a) Pins on plug of extension cord are the
same number, size and shape as those of plug on charger; b) Extension cord is
properly wired and in good electrical condition; and c) Wire size is large enough
for ac ampere rating as specified in “technical data”.
Do not operate charger with a damaged cord or plug - return the charger to the
place where purchased.
Never operate the charger if it has received a sharp blow, been dropped or
otherwise damaged in any way; take it to a qualified serviceman.
Do not disassemble the charger; take it to a qualified serviceman when service or
repair is required. Incorrect reassembly may result in a risk of electrical shock or
fire.
To reduce risk of electric shock, unplug charger from AC outlet before attempting
any maintenance or cleaning. Turning off controls will not reduce the risk.
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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. PERSONAL PRECAUTIONS
a)
b)
c)
d)
e)
f)
g)
h)
i)
Some one should be within voice range or close enough to come to your aid when
you work near a lead-acid battery.
Have plenty of fresh water and soap nearby in case battery acid contacts skin,
clothing or eyes.
Always wear complete eye protection and clothing protection. Avoid touching eyes
while working near battery.
If battery acid contacts skin or clothing, wash immediately with soap and water.
If acid enters eye, immediately flood eye with running cold water for at least 10
minutes and get medical attention immediately.
NEVER smoke or allow a spark or flame in vicinity of battery or engine.
Be extra cautious to reduce risk of dropping a metal tool onto battery. It might
spark or short-circuit battery or other electrical part that may cause explosion.
Remove personal metal items such as rings, bracelets, necklaces, and watches
when working with 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.
Use charger for charging a LEAD-ACID battery only. It is not intended to supply
power to a low voltage electrical. Do not use battery charger for dry-cell batteries
that are commonly used with home appliances. These batteries may burst and
cause injury to persons and damage to property.
Never charge a frozen battery.
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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.
Add distilled water in each cell until battery acid reaches level specified by battery
manufacturer. This helps to purge excessive gas from cells. Do not overfill. For a
battery without cell caps, carefully follow manufacturer’s recharging instruction.
Study battery manufacturer’s specific precautions such as removing or not
removing cell caps while charging.
Determine voltage of battery by referring to car owner’s manual and make sure
that the output voltage selector switch is set at correct voltage.
14. CHARGER LOCATION
a)
b)
c)
d)
e)
Locate charger as far away from the battery as battery charger cables permit.
Never place charger directly above battery being charged; gases from battery will
corrode and damage charger.
Never allow battery acid to drip on charger.
Do not operate charger in a closed-in area or restrict ventilation in any way.
Do not set a battery on top of charger.
15. DC CONNECTION PRECAUTIONS
a)
b)
Connect and disconnect dc output clips only after setting any charger switches to
off position and removing ac cord from electric outlet. Never allow clips to touch
each other.
Attach clips to battery and chassis as indicated in 16(e), 16(f), 17(b) and 17(d).
16. FOLLOW THESE STEPS WHEN BATTERY
IS INSTALLED IN VEHICLE. A SPARK
NEAR BATTERY MAY CAUSE BATTERY
EXPLOSION. TO REDUCE RISK OF A SPARK
NEAR BATTERY:
a)
Position ac and dc cord in a safe position to reduce risk of damage by hood, door
or moving engine part.
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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. Connect positive charger clip (red) to positive battery terminal.
2. Connect negative charger clip (black) to a good metal engine ground away
from the battery. Do no 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.
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 no 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.
When disconnecting charger, disconnect AC cord, remove clip from vehicle
chassis, and then remove clip from battery terminal.
See operating instructions for charge information.
17. FOLLOW THESE STEPS WHEN BATTERY
IS OUTSIDE VEHICLE. A SPARK NEAR
BATTERY MAY CAUSE BATTERY
EXPLOSION. TO REDUCE RISK OF A SPARK
NEAR BATTERY:
a)
b)
c)
d)
Check polarity of battery terminals. POSITIVE (POS, P, +) battery post usually has
larger diameter than NEGATIVE (NEG, N, -) post.
Connect POSITIVE (RED) charger clip to POSITIVE (POS, P, +) battery post.
Connect NEGATIVE (Black) charger clip to NEGATIVE (NEG, N, -) battery post.
The red alarm indication light will indicate a battery, which is connected to reverse
polarity.
Connect charger’s AC cord to socket.
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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.
If the MULTI US 3300 does not switch to maintenance charge after three days (green light
illuminated), there is a fault. Possible causes:
• The battery is probably worn out and should be replaced.
• Some large antimony batteries may behave different and can allow the MULTI US 3300
to charge the battery for too long, which can lead to overcharging. See caution!
• If heavy power consumers like fitted alarms and navigation computers are connected to
the battery, the charging process takes longer and this can also overcharge the battery.
• A sulphated battery will only accept current with difficulty, and consequently the
charging process takes a particularly long time. A worn out battery cannot be fully
charged. Therefore you should always check whether the charger has been switched to
maintenance charge before you leave it turned on or unobserved for any length of time.
Caution: If the MULTI US 3300 does not switch to maintenance charge mode after three
days, manually switch it to pulse maintenance mode. If the set has been switched to
maintenance charge, then everything is in order. Note: A battery that hasn’t changed to
maintenance charge after three days is most likely worn out and needs to be replaced. All
other batteries can be maintained for a very long time.
CHARGING
Connecting the MULTI US 3300:
- Connecting the equipment to a battery fitted in the vehicle:
1. When the battery cable is being connected or disconnected, the plug of the
MULTI US 3300 must be disconnected from the power socket.
2. Establish which terminal is ground (connected to the chassis). Normally the negative
terminal is grounded.
3. Charging a battery grounded to the negative terminal: Negative-grounded vehicle
Charger connection.
1. Connect positive charger clip (red) to positive battery terminal.
2. Connect negative charger clip (black) 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.
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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.
Connecting the MULTI US 3300 to an out of vehicle battery:
a)
Check polarity of battery terminals. POSITIVE (POS, P, +) battery post usually has
larger diameter than NEGATIVE (NEG, N, -) post.
b)
Connect POSITIVE (RED) charger clip to POSITIVE (POS, P, +) battery post.
c)
Connect NEGATIVE (Black) charger clip to NEGATIVE (NEG, N, -) battery post.
The red alarm indication light will indicate a battery, which is connected to reverse
polarity.
d)
Connect charger’s AC cord to socket.
e)
Do not face the battery when making the final connection.
f)
When disconnecting charger, disconnect in reverse sequence from connecting
procedure. See operating instructions for charge information.
Starting the charging process
1. Set the correct charge mode by pressing the mode button. You can find out how to
select the correct charge mode to be used for charging your battery in the section on
“SETTINGS”.
2. Once you have established that the battery cable has been correctly connected you
can start the charging process. To do so, insert the charger plug into the AC socket.
3. Now either the charge indicator
or the maintenance charge indicator
lights
up. When the maintenance charge indicator lights up, the battery is fully charged. If the
battery voltage drops, the charger sends a pulse to the battery. The length of the pulse
depends on how much charge the battery has lost. The MULTI US 3300 may be connected for months at a time. However it is recommended to monitor batteries on charge.
4. If nothing happens: If the indicator for the set voltage is still illuminated, but no other
indicator is illuminated, the connection to the battery or the chassis could be faulty, or the
battery could be defective. If the charging process has not started, this could be due to
the fact that the power socket is not supplying a current.
5. The charging process can be interrupted at any time. In addition pull the plug of the
charger out of the power socket or put the charger on Stand-by/Power On . Always
remove the plug of the charger from the power socket before disconnecting the battery
cable. If you interrupt the charging process of a battery fitted in a vehicle, the battery
cable must always be first disconnected from the chassis and then from the other battery
cable.
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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.
BATTERY TYPES AND SETTINGS
MULTI US 3300 can easily be set for different types of batteries or conditions. The following recommendations should however only be seen as guidelines. Please consult the
battery manufacturer for further instructions.
Settings are made by pressing the ”MODE-button” and stepping forward one press at a
time until the required mode is reached, the button is then released. The selected mode is
saved in a memory in the charger and remains there even if the charger is switched off.
Mode 14.4V/0.8A
This mode is normally used for batteries <14 Ah.
Mode 14.4V/3.3A
Normal setting for wet batteries, maintenance free and for most Gel batteries. Some
gel batteries prefer a slightly lower voltage. Please consult the battery manufacturer
when in doubt.
Mode 14.7V/3.3A
This setting is recommended for a battery at temperatures < 5 degrees C. It is also
recommended for many AGM batteries like Optima, Maxxima and Odysses. Consult
your battery manufacturer when in doubt.
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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
12.9 V, the charger automatically starts again at the first step of the charge characteristic.
The MULTI US 3300 measures both voltage and current in order to determine out whether
the charging process is finished or whether a new charging cycle must be started. Various
methods are used, depending on the time of the measurement; see table:
Reading
Voltage higher than
12.9 V?
Yes
Green indicator lit
until the voltage
< 12.9 V.
Current greater than Orange indicator,
0.4 A?
charging process.
Voltage/Current
When?
Before the start or
after changing the
charging mode.
During the charging
process.
No
Orange indicator,
charging process.
Green indicator
illuminated until the
voltage < 12.9 V.
Voltage
Bulk
Io
Absorption
Uo
Pulse
Up
Current
Time
Bulk: Charging where about 80% of the energy is returned. The charger delivers an
almost constant current until the battery voltage reaches the set level.
Absorption: Charging up to almost 100%. The charge current tapers and the voltage is
kept constant at the set level.
Pulse: Maintenance charge. The charging process ranges between 95 % and 100 %.
The battery receives a pulse if the voltage falls. This stage will keep your battery in a good
condition if it is not being used.
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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.
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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. Do not cover the charger.
Three step fully automatic IUoUp, with pulse maintenance mode.
All types of lead-acid batteries.
2-90 Ah
6 1/2 x 2 3/8 x 1 1/2 inches (L x W x H)
Splashproof/Rainproof.
1.1 lbs
*) The back current drain is the current that the charger uses from the battery when the
wall plug is not connected. The reverse current of the MULTI US 3300 is very low and
corresponds to 1 Ah per month.
**)The ripple wave describes how many disturbances are exhibited by current and voltage. A rippled voltage can cause damage to other equipment connected to the battery.
The MULTI US 3300 supplies voltage and current with very low voltage rippling. This
increases the life of the battery and ensures that equipment connected to it will not be
damaged.
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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. If the power cable is damaged it must be replaced by CTEK or its
authorized representative. The charger casing can be cleaned using a damp cloth and
mild cleaning agent. Remove the plug from the power socket before cleaning.
LIMITED WARRANTY
CTEK SWEDEN AB, Rostugnsv. 3, SE-776 70 VIKMANSHYTTAN, SWEDEN issues this
limited warranty to the original purchaser of this product. This limited warranty is not transferable. CTEK SWEDEN AB warrants this unit for two years from the date of purchase
against defect workmanship or material. It is the obligation of the purchaser to forward
the unit together with proof of purchase to the manufacturer or its representative with
transportation cost prepaid. This warranty is void if the unit is abused, handled carelessly
or repaired by anyone other than CTEK SWEDEN AB or its authorized representative.
CTEK SWEDEN AB makes no warranty other than this limited warranty and expressly
excludes any implied warranty including any warranty for consequential damages. This
is the only expressed limited warranty and CTEK SWEDEN AB neither assumes nor
authorizes anyone to assume or make any other obligation towards the product other than
this limited warranty.
CTEK SWEDEN AB
Rostugnsvägen 3
SE-776 70 VIKMANSHYTTAN
SWEDEN
Fax: + 46 225 307 93
www.ctek.com
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