Blue Sea Systems SI Series 7610 - Automatic Charging Relay Installation Manual

Features

• Automatically combines batteries during charging, isolates batteries when discharging and when starting engines
• Supports high-output alternators up to 120 Amps
• Ignition protected—safe for installation aboard gasoline powered boats
• Built-in LED light is ON when batteries are combined
• Allows temporary isolation of house loads from engine circuit during engine cranking to protect sensitive electronics—start isolation indicated by blinking LED
• Under voltage lockout—will not close when the lower battery is below 10.8V @ 12V operation or 21.6V @ 24V operation—lockout indicated by blinking LED
• Waterproof rated IP67----temporary immersion for 30 minutes
• Designed for 12 or 24 volt systems
• Dual Sensing—senses charge source on either battery bank

LED Status Chart

LED	Relay	Status	Action
ON	Closed	Combined	No Action
OFF	Open	Isolated	No Action
Flash	Open	Isolated- Start Isolation	Check Start Isolation (SI) Wire
Flash	Open	Isolated-Under Volage Lockout	Combine Batteries Until Voltage is ≥ 10.9V @ 12V or ≥ 21.7V @ 24V

Installation Instructions

Mounting

• To avoid corrosion to connecting wires and terminals, mount in a dry and protected location if possible. Avoid locations directly above the battery banks.

Electrical Connections

• The wiring diagrams illustrated on the back page represent common installations and are not meant to be a guide for wiring a specific vessel.
• The 7610 ACR is not intended to carry starting currents. Use a battery switching system with a combine batteries/parallel function if batteries may need to be combined for emergency starting.
  
  Disconnect battery connections before beginning the installation.
  Use the wire sizing chart below to select the appropriate wire sizes to prevent overheating the ACR.

* Larger wire sizes may be required to minimize voltage drop in long wire runs. For more information please use the Circuit Wizard at www.circuitwizard.bluesea.com.

Voltage Sensing

• The 120 Ampere SI ACR (7610) will sense charging sources available on either battery bank.

Minimum connections for operation:

• Connect one battery bank to stud terminal A.
• Connect the other battery bank to stud terminal B.
• Connect the quick connect terminal marked GND (ground) to the DC system ground through a ten to fifteen amp in-line fuse to prevent fault currents from flowing in this wire.

Optional connections:

1. Start Isolation (SI) Wire
   • The 7610 ACR can be configured to automatically disconnect when the starting circuit is engaged. Enable this feature to isolate the start circuit from the house circuits and prevent starting currents from flowing through the ACR or starting current transients from interfering with loads on other batteries. The reaction time of the 7610 ACR is fast enough to disconnect the battery banks before the starting current rises in the starting circuit.
     To enable start isolation:

• Connect a wire from the quick connect terminal marked SI (starting isolation) to the terminal or wire running from the start key switch to the starter solenoid. Make this connection through an in-line fuse of 1 to 10 Amps. This connection can be made at the start key switch or at the starter solenoid, but must be to the line that is positive only when cranking. Connection to a line that is positive while the engine is normally running will prevent the charging relay from working properly.

2. Remote indicator lamp – mirrors "COMBINED" LED on unit.

• Appropriate 12/24V LEDs include Blue Sea Systems PNs 8033 (amber), 8171 (red), or 8172 (green).
  To connect a remote LED indicator:
  • Connect the red wire of the LED to a 12/24V positive source through a 2A inline fuse.
  • Connect the yellow wire of the LED to the quick connect terminal marked LED.

Open/Close Cycling

• If your electrical system is configured with a charging source that cannot supply the full load current being drawn from the receiving batteries, an open/close cycling process can occur. If this cycling continues, the second battery bank could eventually discharge even though a charge source is present.

Quick Installation Diagram

See Wire Size and Fuse Rating charts for connections from Terminals A and B.

Full Installation Diagram