iTechworld iTECHDCDC20 User manual

User Guide
iTECHDCDC20
In vehicle DC battery charger

Heavy duty aluminium case and mounting brackets.
Microchip monitoring and control.
Fully automatic high frequency multi stage charging
Pulse mode technology that reduces oxidation, evens
electrolyte consistency and minimizes temperate
equating.
Easy push button charge profile select.
Internal charger temperature monitoring and power
output control.
LED indicators showing state of charge.
Over charging, short circuit and temperature protection.
Reverse polarity protection.
Thermal overload protection.
Solar input overload protection.
MPPT solar input.
IP67 fully waterproof and dust proof.
Power cut memory function: Once selected the charger
will remain on this battery type until it is changed.
The iTECHDCDC20 is a sophisticated multi stage dual input
charger. The iTECHDCDC20 utilizes push button switch
mode to cater for Lead acid, AGM/GEL, calcium or lithium
batteries.
KEY FEATURES
USER GUIDE

Locate where you are going to install the iTECHDCDC20.
Ensure the iTECHDCDC20 is securely mounted using the
brackets.
Ensure all cabling meets specifications and will not be
exposed to excessive heat/moving parts or abrasion.
If the charger is located in a camper/caravan we
recommend the use of an Anderson style plug between
the tow vehicle and the camper/caravan.
Fit the suitable connectors on either end of the twin core
cables.
TheiTECHDCDC20 has a shared negative internally.
Using twin core wiring between the auxiliary battery
and iTECHDCDC20 connect the red (+) to the (+ blue
cable) DC output terminal(Black anderson plug) and the
black (-) to the (-)negative on the rear of the
iTECHDCDC20. It is recommended to install a 30Amp fuse
(not included) on the positive cable between the auxiliary
battery and the iTECHDCDC20. The fuse should be
located as close as possible to the battery.
The iTECHDCDC20 must be installed by a qualified auto
electrician. Installation of the iTECHDCDC20 will require
twin core wiring and suitable connectors. Anderson plug
type connectors are supplied in the kit.
Any existing cables used in conjunction with the
iTECHDCDC20 will require checking to ensure the gauge is
correct.
INSTALLATION
USER GUIDE

Using twin core wiring between the main starting
battery and iTECHDCDC20 connect the red (+) to the (+)
DC input terminal(Red anderson plug) and the black (-) to
the (-)negative on the rear of the iTECHDCDC20. Finally,
make the power connections to the main starting battery
of the vehicle. It is recommended to install a 30Amp fuse
(not included) on the positive cable between the starting
battery and the iTECHDCDC20. The fuse should be
located as close as possible to the battery.
The optional ignition override cable is used to wire into
the ignition/acc of your vehicle if you have a smart
alternator. This will force DC charge once the ignition is
switched on, lowering the charge cut in voltage to 11.50V
and low voltage cut off to 10.80V.
Check all connections are secure and tight.
INSTALLATION CONTINUED
USER GUIDE

INSTALLATION CONTINUED
USER GUIDE
*Fuse not included

OPERATING THE ITECHDCDC20
USER GUIDE
Start the vehicle and let it idle.
The iTECHDCDC20 will now recognize that there is charge
being applied to the main starting battery.
Once the main starting battery has reached 12.8v the
charger will begin to charge the aux battery.
The initial default setting is for AGM/GEL batteries.
If you are charging a battery of a different chemistry,
simply change the battery type by unplugging the aux
battery, then press the battery type selector button on
the front panel of the iTECHDCDC20 and reconnect the
aux battery.
Once you have selected the new battery type the
iTECHDCDC20 will remain on this battery type until it is
changed. To change battery type the auxiliary battery
must be disconnected from the iTECHDCDC20. This is a
safety feature to stop you accidently changing the
battery charge profile.
The iTECHDCDC20 will continue to operate even after the
vehicle has been switched off, however once the main
starting battery falls below 12.4v the iTECHDCDC20 the
charger will automatically switch off.
DC BATTERY
Once correctly installed, the iTECHDCDC20 is a simple set
and forget system.

Once your solar panel has been connected to the solar
input section of the iTECHDCDC20 the charger will
transfer to solar mode when the vehicle is not running.
The initial default setting is for AGM/GEL batteries.
If you are charging a battery of a different chemistry,
simply change the battery type by unplugging the aux
battery, then press the battery type selector button on
the front panel of the iTECHDCDC20 and reconnect the
aux battery.
Once you have selected the new battery type the
iTECHDCDC20 will remain on this battery type until it is
changed.
Solar charging requires a solar input of 16 to 25v.
Your solar panel will need to be unregulated when
connecting to the iTECHDCDC20.
SOLAR INPUT
Once correctly installed, the iTECHDCDC20 has MPPT solar
charging for increased solar efficiency.
OPERATING THE ITECHDCDC20
USER GUIDE

FRONT PANEL INDICATOR LIGHTS
OPERATING THE ITECHDCDC20
USER GUIDE

FRONT PANEL INDICATOR LIGHTS
OPERATING THE ITECHDCDC20
USER GUIDE
DC Charge
Whencharging is from the DC input of the iTECHDCDC20,
the red charging LED will be lit.
DC Charge
When the auxiliary battery is full, the green Full LED will be
lit. The iTECHDCDC20 will now enter maintenance mode
and provide 0.1A-10A charging current. It will not return to
the charging mode until the auxiliary battery is drained
down to 12.6Volts. If you want to force start recharging the
aux battery, simply disconnect and reconnect the aux
battery from the iTECHDCDC20.

FRONT PANEL INDICATOR LIGHTS
OPERATING THE ITECHDCDC20
USER GUIDE
Solar Charge
When the aux battery is full, the green Full LED will be lit.
The iTECHDCDC20 will now enter maintenance mode and
provide 0.1A-10A charging current. It will not return to the
charging mode until the auxiliary battery is drained down
to 12.6Volts. If you want to force start recharging the aux
battery, simply disconnect and reconnect the aux battery
from the iTECHDCDC20. Please note, the iTECHDCDC20
requires a minimum of 25Watts to maintain solar charge.
Solar Charge
Whencharging is from the solar input of the iTECHDCDC20
the red charging and solar input LEDs will be lit.

SPECIFICATIONS & WIRING GAUGE
USER GUIDE
D
12.40
12.4
20
Up to 20A
Up to 20A
10A
0.1A - 10A
10 AWG

CHARGING SPECIFICATIONS
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12.8V
12.4V
11.50V
10V

FAULT FINDING
USER GUIDE
If the iTECHDCDC20 is beeping with no flashing lights,
please check the polarity of your auxiliary battery
If the iTECHDCDC20 is beeping and the red power LED is
flashing, the iTECHDCDC20 has detected a fault with your
auxiliary battery, please double check your wiring and
electrical connections. It is possible that your battery will
need to be replaced.
ALARMS