Blue Sea Systems 7521 P12 Battery Charger - 12V DC 25A - Manual (Page 12)

Specifications are subject to change. See bluesea.com/P12 for current information.
DC Safety
Ground
Battery 2 Battery 3 Battery 1
Line Neutral Ground
AC Connections
#8 (M4) Ring Terminals
DC Connections
1/4" (M6) Ring Terminals
Fuse Fuse Fuse
Temperature
Sense
RJ11 Port
Remote
Display
RJ45 Port
Installation Instructions
(continued)
NOTE: If you have a Blue Sea Systems ACR with Start Isolation it is possible to take advantage of the P12 Battery Chargers ability to integrate with it. The P12
is designed to charge three electrically independent batteries or battery banks. The P12 has the unique capability to individually move each battery out of
Absorption charging stage. This ensures batteries near their full charge do not continue to receive high constant voltages necessary in the Absorption stage. This
is optimal treatment for long battery life. Charge Coordination integrates with the Blue Sea Systems family of Automatic Charging Relays (ACR) to force separation
of the battery bank while the P12 is operational, to allow the batteries to individually exit the absorption stage. (see pages 22–23)
6. Route the AC wires from the charger to the AC panel and terminate wires at the charger.
7. Make the AC source connections to the appropriate panel circuit breaker and leave in the “off” position. (see Table D page 5).
NOTE: Connect AC wiring, but do not energize the circuit until AC covers are installed, DC is connected, and DC fuses are installed.
Wiring Connections
1. Attach the battery charger remote connection to the back of the P12 Battery Charger Remote using dielectric grease. Connect to the Remote Display/Com
port of the charger.
2. Connect the Automatic Charging Relay(s) (ACR) wire to the ACR Connection port(s)
Optional Installations see pages 22–23
10
8. Recommended Connection: Attach the battery temperature sensor wire to the largest battery bank. If all battery banks are the same size attach to bank with the most loads.
Blue Sea Systems recommends using a high quality dielectric grease for remote control and temperature sensor connections.
a. Attach the sensor in the center of the long side of the battery.
b. If multiple batteries are in a battery bank attach sensor in the center between multiple batteries.
c. When external circumstances could create a significant difference in temperature on one side of a battery versus another, always attach temperature sensor
on warmest side.
9. Install appropriate DC Fuses. (see Table B page 5)
10. Confirm all connections are accurately installed per
Wiring Connections Diagram.
11. Secure AC and DC strain relief covers and fasten down.
12. Secure the termination cover back over the connected wires
and latch the yellow tabs.
13. Restore AC power and turn on the AC supply circuit
breaker to the battery charger.
14. Perform the chargers setup procedure as outlined in
Initial Charger Setup page 11.
P12
7521 AND 7522 BATTERY CHARGERS