UniCharge 50
Automatic Battery Charger
IMPORTANT SAFETY
INSTRUCTIONS
SAVE THESE INSTRUCTIONS
1. This manual contains important safety and operating
instructions for battery charger types UniCharge 50.
2. Do not expose charger to rain or snow.
3. This charger is suitable for commercial use only and is
to be permanently installed and hard-wired within
an enclosure.
4. Use of an attachment not recommended or sold by the
battery charger manufacturer may result in a risk of
fire, electric shock, or injury to persons.
5. Do not over-tighten field wiring terminals. Observe the
recommended tightening torque of 0.5Nm
(4.5 pound/inch).
6. Do not operate charger with damaged connections
replace faulty external wiring 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 serviceman or return it to the
manufacturer.
8. Do not disassemble charger; take it to a qualified
serviceman or return it to the manufacturer when
service or repair is required. Incorrect reassembly may
result in a risk of electric shock or fire.
9. To reduce risk of electric shock, unplug charger from
outlet before attempting any maintenance or cleaning.
Turning off controls will not reduce this risk.
10. WARNING – RISK OF EXPLOSIVE GASES.
a) WORKING IN 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
YOU FOLLOW THE INSTRUCTIONS EACH TIME
YOU USE THE CHARGER.
b) To reduce risk of battery explosion, follow these
instructions and those published by battery
manufacturer and manufacturer of any equipment
you intend to use in vicinity of battery. Review
cautionary marking on these products.
11. PERSONAL PRECAUTIONS
a) Consider having someone close enough by to
come to your aid when you work near a lead-acid
battery.
b) Have plenty of fresh water and soap nearby in
case battery acid contacts skin, clothing, or eyes.
c) Wear complete eye protection and clothing
protection. Avoid touching eyes while working near
battery.
d) 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.
e) NEVER smoke or allow a spark or flame in vicinity
of battery or engine.
f) 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.
g) Remove 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.
h) Use charger for charging LEAD-ACID, SEALED
LEAD ACID (VRLA) or GEL type batteries only.
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.
i) NEVER charge a frozen battery.
12. PREPARING TO CHARGE
a) Be sure area around battery is well ventilated while
battery is being charged.
b) Clean battery terminals. Be careful to keep
corrosion from coming in contact with eyes.
c) Add distilled water in each cell until battery acid
reaches level specified by battery manufacturer.
Do not overfill. For a battery without removable cell
caps, such as valve regulated lead acid batteries,
carefully follow manufacturer’s recharging
instructions.
d) Study all battery manufacturer’s specific
precautions while charging and recommended
rates of charge.
e) Determine voltage of battery by referring to battery
manufacturers manual and make sure that the
battery chargers output voltage is set at the correct
voltage.
13. CHARGER LOCATION
a) Install the charger in an enclosure separated from
the battery.
b) Mount the unit on a flat surface in any orientation
c) Use pre-drilled holes, press-fit nuts or drill mounting
holes to suit. Use M4 or equivalent machine screws
with suitable nuts and vibration-proof washers.
DO NOT over tighten fixing screws.
d) Ensure adequate ventilation within enclosure.
Do not operate charger in a closed-in area or
restrict ventilation in any way. Leave at least 15mm
of space on all sides for adequate heat dispersion
and free air convection.
e) Never place charger directly above battery being
charged; gases from battery will corrode and
damage charger.
f) Never allow battery acid to drip on charger when
reading electrolyte specific gravity or filling battery.
g) Do not set a battery on top of charger.
14. DC CONNECTION PRECAUTIONS
a) This charger is suitable for commercial use only
and is to be permanently installed and hard-wired
within an enclosure.
b) Use tri-rated cable of at least 16 AWG (1.5mm
cross-sectional area) for dc output connections.
Recommended cable type is UL style 1015 or
2
equivalent. Contact manufacturer for other
approved cable types.
c) NEVER connect dc output cables with charger
switched on. Isolate and remove ac input before
connection. Never allow exposed dc cable ends to
touch each other.
15. GROUNDING INSTRUCTIONS
This battery charger should be connected to a
equipment-grounding conductor run with circuit
conductors and connected to the equipment-grounding
terminal on the battery charger. Connections to
the battery charger should comply with all local codes
and ordinances.
16. AC CONNECTION PRECAUTIONS
a) This charger is suitable for commercial use only
and is to be permanently installed and hard-wired
within an enclosure.
b) Use tri-rated cable of at least 22 AWG (0.5mm
2
cross-sectional area) for ac input connections.
Recommended cable type is UL style 1015 or
equivalent. Contact manufacturer for other
approved cable types.
c) WARNING - Always Isolate and remove the ac
input before any connections are made.
17. FAIL SIGNAL CONNECTION PRECAUTIONS
a) The optional fail signal circuit is rated at 30V 1A dc.
b) CAUTION - Never use the fail signal with voltages
above its dc rating. Never use ac voltages on the
fail signal circuit.
automatic trickle charging and has a constant
current / constant voltage characteristic. When
the battery is discharged the charger will supply
maximum output current (constant current mode)
until the battery reaches the float voltage setting.
Once this is reached the charger switches to
constant voltage mode and automatically float
charges the battery.
e) Output Current Limit:
The battery chargers output is automatically
protected against over-load by means of an
electronic current limiting feature.
f) Output Short Circuit:
A short circuit applied to the battery chargers
dc output will not damage the unit. Short circuit
current is equal to the maximum output current
rating of the unit.
g) Reversed Battery Polarity:
Incorrect battery polarity will cause the DC output
fuse to operate. The fuse must be replaced with the
same type and rating (5 Amp ATO Type) for correct
operation.
h) Output Overvoltage Shutdown:
Excessive dc voltages on the chargers output will
operate the overvoltage shutdown feature. The AC
input and dc output power sources have to be re cycled to reset this protection feature.
i) High Temperature Shutdown;
The battery charger will automatically switch off
if the internal temperature rises above acceptable
limits. This feature automatically resets when the
unit has cooled.
18. OPERATING INSTRUCTIONS
a) DC Output Voltage Adjustment:
Turn the output adjustment potentiometer, marked
‘Volt Adj.’ clockwise to increase the chargers output
voltage or anti-clockwise to decrease the voltage.
CAUTION - Always adhere to the battery
manufacturers recommended float voltage and
adjust the battery chargers output to suit. Only set
the chargers output voltage when the battery is in
float condition (minimal charge current into
battery).
WARNING - DO NOT try to overcharge the
battery by increasing the voltage above the battery
manufacturers recommendation. This can result
in excessive heating or gassing of the battery.
b) DC Output Fuse:
The DC O/P fuse will blow if excessive output
current flows (abnormal condition) or the battery
polarity is reversed.
WARNING - If the fuse blows then it must be
replaced with the same type and rating of fuse.
Fuse = ATO type 5 Amp, colour code = Tan.
c) Fail Alarm (Optional):
The optional fail alarm provides one set of volt-free
SPCO contacts for remote signalling of a fault
condition. The contacts are energised when the
chargers output is healthy and will de-energise on
one of the following; Loss of ac input power, loss of
dc output power, output overvoltage, output
undervoltage, thermal cutout or reversed battery
connection.
d) The battery charger is designed for continuous
19. MAINTENANCE INSTRUCTIONS
No specific maintenance plan is required, however it
is recommended that the output voltage is measured
periodically to ensure compliance with the battery
manufacturers recommended levels.
If the voltage requires adjustment then refer to ‘18 a’
above.
20. INPUT RATING
Voltage Range 100 - 240 V AC
Frequency 50 - 60 Hz
Input Current 1.5 A
Inrush Current 60 A
Leakage Current <1.0mA @ 240V AC
21. OUTPUT RATING
Voltage 12V Type = 13.6V Float
(Adjustable)
24V Type = 27.2V Float (Adjustable)
Current 12V Type = 3.5A Continuous
24V Type = 2.0A Continuous
Ripple & Noise <0.5%
Efficiency 75% - 80%
22. ENVIRONMENTAL CONDITIONS
Operating Temperature (at full load) -10 to +25
O
C
Storage Temperature -20 to +60 OC
Maximum unpacked weight 1 Kg
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