Sargent Dx320-12 Dc To Dc Battery Charger Instruction Manual

SARGENT DX320-12 DC to DC Battery Charger

Overview

This DC-DC charger provides multi-stage charging of a leisure battery from the vehicle battery. The unit is compatible with smart or traditional alternator types and is able to charge most leisure vehicle batteries.

Key Features

• Selectable charging for Flooded, AGM, Gel & Lithium batteries
• 3-Stage charging profile for fast effective charging
• Fully automatic operation when vehicle is started
• Protected against overheating, overvoltage, short circuit, over-current

1. Vehicle battery inputs
2. Leisure battery outputs
3. Engine running signal (D+)
4. Temperature sensor inputs (optional)
5. Display panel input (optional)
6. Battery type selection switches
7. Bluetooth module input (optional)
8. Charge Status indicators
9. Screw fixing points
10. Cooling fan

Installation

The charger should be installed horizontally or vertically as close to the leisure battery as possible, ensuring the surrounding area is dust free and well ventilated. During operation the chargers cooling fan will exhaust warm air, so ensure there is at least 10cm clear around the charger at all times.

Wiring & Fusing

When fitting, try to keep cabling runs as short as possible and do not underrate, as this will lead to excessive voltage losses and reduced performance. Under full load the charger will draw a large amount of current and the input side will typically draw larger currents than the output by a factor of up to 25%. Please refer to the table to select a suitable wiring gauge, length and recommended fuse rating.

Connections

Note:- Reverse connection of the battery may blow internal fuses and cause damage to the unit.

Engine Running Signal (D+)

The D+ input is used to automatically turn on the charger when the engine is started. Connect a signal wire to the D+ terminal of the vehicles alternator as shown in the diagram. On vehicles with smart alternators it  may not be possible to connect directly to the alternator, in which case consult the vehicle manufacturer for a suitable location. Alternatively the D+ input may be connected to a switched ignition circuit. Note:- If using this method care must be taken, as leaving the ignition in the On position with the engine Off may result in over discharge of the vehicle battery.

Temperature Sensor (optional)

With the optional temperature sensor fitted, the charger can adjust the rate of charge, depending on the ambient temperature. For example in winter the charge rate will be increased and in summer it will be reduced. It is recommended to install the sensor on the negative terminal of the Leisure battery or on the battery casing. Note:- The unit will use a default setting if the temperature sensor is not fitted.

Battery Selection

Before using the charger, ensure the correct battery type has been set using the selector switches.

Setting	Battery Type
	Gel
	Lead Acid
	AGM
	LiFeP04
	Lithium Ion

Note:- If an invalid selection is chosen, all status indicators on the unit will flash.

Charging profile

Depending on the battery type selected, the 3-stage charging profile will be adjusted to maximize charging performance.

The following table shows voltages used for each battery type setting

Operation

Indicators

During charging, indicators on top of the unit will show the current mode of operation, as shown in the following table

Note:- During power-on, all indicators will flash for 1 second then go out to confirm correct operation.

Power Derating

If the vehicle battery voltage becomes low, the output current will be reduced to avoid over discharge and vehicle starting problems.

Note:- If the vehicle battery voltage falls below 11.2V then charging will be stopped until the battery is recharged above 12.6V

Protection

If there is a problem during charging, the unit will sound an alarm and may also shut down to protect itself. The following table shows the various protection modes.

* – If an internal fuse blows, it can be replaced by removing the top cover.
To do this unscrew the uppermost 2 x screws on each end plate and the top cover can then be removed.

Specification

Sargent Electrical Services Ltd
Unit 39. Tokenspire Business Park. Beverley. East Yorks. HU17 OTB. UK
Phone, +44(0)1482 881655 I Fax, +44(0)1482 678987
Email: [email protected]
Tech Support, +44(0)1482 678981