IOTA DLS-UI-27-40 User Manual

DLS

SERIES

DLS-UI-27-40 CONVERTER/CHARGER

OWNER’S MANUAL

Thank you for purchasing IOTA’s DLS Series Power Converter/Battery Charger. When utilized properly, your DLS Power
Converter/Battery Charger will provide years of dependable service. This Owner’s Manual contains important safety and
operating instructions. READ ALL INSTRUCTIONS AND SAFETY PRECAUTIONS CAREFULLY BEFORE INSTALLING
AND OPERATING THE UNIT.

WARNING

Risk of SERIOUS INJURY OR DEATH

This unit is an electrical device. When working with this, or any
electrical device, there exists the potential for

ELECTRICAL SHOCK, EXPLOSION and FIRE hazards.

Before using this equipment, READ AND UNDERSTAND the
instructions, warnings, and safety precautions in this Owner’s
Manual. Failure to read and understand these instructions could
result in SERIOUS INJURY or DEATH.

SAVE THESE INSTRUCTIONS

CAUTION

When working with the DLS unit, always observe the fol­lowing guidelines:

• The DLS is designed for indoor use. Do not use outdoors.

• DO NOT expose the DLS unit to rain, snow, or other
inclement weather.

• Do not mount the DLS in a zero clearance compartment or
in compartments with flammable items such as gasoline
or batteries.

• Do not mount the DLS in an area with the potential of
dust, debris, or other foreign materials entering the vents
of the DLS.

• Use of an attachment or device with the DLS not recom­mended by IOTA Engineering will void the warranty and
may result in a risk of fire, electrical shock, or injury to
persons.

• To reduce the risk of damage to the electric plug and cord,
always pull by the plug and not the cord when disconnect­ing the unit.

• DO NOT operate the DLS with a damaged cord or plug.

• DO NOT operate the DLS if it has been dropped, received
a sharp blow, or has been otherwise damaged in any way.
Take the DLS unit to a qualified service location.

• DO NOT disassemble the DLS unit. Take the DLS to
a qualified service location when service or repair is
required.

• To reduce the risk of electric shock, DISCONNECT the
DLS charger from ALL power sources before attempt­ing any maintenance or cleaning. Turning off any electri­cal supply or load to the unit is not sufficient and will not
reduce this risk.

DANGER

ELECTRICAL SHOCK HAZARD

THIS CHARGER IS AN ELECTRICAL
DEVICE THAT CAN SHOCK AND CAUSE
SERIOUS INJURY.

DO NOT CUT POWER CORDS.
DO NOT SUBMERGE IN WATER OR GET

THE CHARGER WET.

EXPLOSION HAZARD

UNSUPERVISED, INCOMPATIBLE, OR
DAMAGED BATTERIES CAN EXPLODE IF
USED WITH A CHARGER.

DO NOT ATTEMPT TO CHARGE DAMAGED
OR FROZEN BATTERIES.

USE THE CHARGER ONLY WITH BATTER­IES OF RECOMMENDED VOLTAGE.

OPERATE THE CHARGER IN
WELL-VENTILATED AREAS ONLY.

WARNING

FIRE HAZARD

A CHARGER IS AN ELECTRICAL DEVICE
THAT EMITS HEAT AND CAN BURN.

DO NOT COVER THE CHARGER.
KEEP THE CHARGER AWAY FROM

COMBUSTIBLE MATERIALS.
DO NOT SMOKE OR USE ANY

OTHER SOURCE OF ELECTRICAL
SPARK OR FIRE WHEN OPERATING
THE CHARGER.

RISK OF EXPLOSIVE GASES

WORKING IN THE VICINITY OF LEAD­ACID BATTERIES IS DANGEROUS.
BATTERIES GENERATE EXPLOSIVE
GASES DURING NORMAL BATTERY
OPERATION. FOR THIS REASON, IT IS
OF UTMOST IMPORTANCE THAT YOU
FOLLOW THE INSTRUCTIONS WHEN
USING THE BATTERY CHARGER.

To reduce the risk of battery explosion, follow
these instructions and those published by the
battery manufacturer and review all Cautions
and Warnings associated with these products.

PRODUCT DESCRIPTION

INSTALLATION GUIDELINES

IOTA DLS Series Power Converter/Battery Chargers
convert 108-264 volts A.C. to 27.2 volts D.C. As a power
supply, its tightly controlled regulation allows the user to
operate any 24 volt nominal D.C. load up to the converter’s
rated output current. As a battery charger, the converter will
maintain the battery, delivering its full-rated current when
the battery capacity falls sufficiently low. The voltage is set
to deliver its maximum current for the necessary period of
time that minimizes undue stress to the battery caused by
heating of its cells. This helps to ensure the longest pos­sible life of the battery. Over time, as the battery nears its
full capacity, the converter will float-charge the battery to
prevent self-discharge of its cells.

PROTECTION FEATURES

The IOTA Power Converters/Battery Chargers are de­signed with high quality components to help ensure
years of continuous use. The unit is protected by multiple
protection features for a long, trouble-free life.

1) Reverse Battery Polarity Protection. 2) Brown-Out In-
put Protection. 3) Over-Current Protection - cycle by cycle
peak limiting as well as rated current limiting to maximize
the life of the converter. 4) Over-Temperature Protection.
In addition, it is designed with a unique “proportional” fan
control circuit. Fan speed is directly proportional to the
converter’s internal ambient temperature. This enables
the fan to turn on and off very slowly, minimizing unwanted
fan-starting noise.

MOUNTING LOCATION

The IOTA Power Converter/Battery Charger can be mounted in
any position within an enclosed or interior compartment. Provide
sufficient air space to allow unrestricted airflow in and around
the unit. Provide at least 4″ around the fans of the DLS to allow
for proper air intake.

DO NOT mount the unit in a zero clearance compartment.
DO NOT mount the DLS in the same compartment with flamma-

ble items such as gasoline or batteries. There are no components
within the DLS unit that, during normal operation, produce arcs
or sparks. However, all electronic devices have some potential
for generating sparks in the event of failure which can result in
explosion or fire.

DO NOT mount the DLS in an area that has the potential of
dust, debris, or other foreign materials to enter in through the
DLS vents.

DO NOT place the DLS directly above the battery; the gases
from the battery can corrode and damage the DLS.

BATTERY CONNECTION

Before you connect the DLS to the battery, make sure that the
AC power cord is NOT plugged into an electrical outlet.

Disconnect the positive side of the battery before installation. Con­nect the positive (red) and negative (black) terminal lugs to battery
or load. Always use the proper size wire based on the amperage
of the converter and the battery. Recommended wire gauge and
torque are as follows: 4-6 AWG at 45 in. -lbs, 8 AWG at 40 in. -lbs.
Refer to Illustration 1. Recreational vehicle applications require
a type III circuit breaker be installed within 18″ of the battery,
connecting the battery positive to the line side of the breaker, and
the IOTA unit to the load side. Connect “Chassis Bonding Lug”
on the IOTA unit to vehicle chassis or other grounding source.
Recommended wire gauge and torque are as follows: 4-6 AWG
at 45 in. -lbs, 8 AWG at 40 in. -lbs. Refer to Illustration 1.

WARRANTY

The IOTA Power Converters/Battery Chargers are war­ranted from defects in materials or workmanship for two
years from date of retail purchase, and limits the remedies
to repair or replacement. This warranty is valid only in
the continental United States and Canada. For com­plete warranty details, contact Customer Service or visit
www.iotaengineering.com.

UNIVERSAL A.C. INPUT

The input cord provided features a three-prong IEC receptacle
for connection to a properly rated input cord which connects to
the 108-264VAC supply. DO NOT OPERATE THE DLS WITH A
DAMAGED CORD OR PLUG. Have the cord or plug replaced
immediately by qualified service personnel.

REVERSE POLARITY FUSES

The IOTA Battery Charger/Power Supply is protected against
reverse polarity on the DC output. If a battery or the unit is
hooked up incorrectly, the fuses will blow and can be easily
replaced. Always use the same size and style fuse that came
with the converter. To change the fuses, use a screwdriver
to loosen the screws and remove the fuses. Always replace
the fuses with the same type and rating. After inserting the
new fuses, tighten the screws firmly. Apply 8 inch-pound
maximum torque. DO NOT OVERTIGHTEN. Note: some DLS

models require only one fuse. For these units, a small fiberglass
spacer may be used in the empty fuse slot to aid with tightening.