Blue Sea Systems P12 user manual SI ES ES SI Engine ACR

Optional Installation (continued)	P12
	7521 AND 7522 BATTERY CHARGERS

ML-ACR Installation Instructions (PN 7620 and PN 7622) to Enable Start Isolation*

1.Disconnect the black ground wire connected to the ML-ACR wire harness.

2.If present, disconnect all Start Isolation wires connected to the Brown, Green, and Orange wires in ML-ACR wire harness.

3.Connect a wire from the ACR 1 port marked “SI” (Start Isolation) on the P12 Battery Charger to both the Brown and Green wires in the ML-ACR wire harness.

NOTE: Connecting the “SI” (Start Isolation) wire to only one of the ML-ACR isolation wires will not properly integrate the P12 battery charger with your ML-ACR.

4.Connect a wire from the ACR 1 terminal marked “ES” (Engine Start Switch) to the terminal or wire running from the start key switch to the starter solenoid.

NOTE: This connection can be made at the start key switch or at the starter solenoid, but must be to the line that is +12V DC 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.

5.Re-connect the black DC Negative (Ground) wire in the ML-ACR wire harness

6.If connecting two ML-ACRs repeat steps 1 through 5 using the second ML-ACR, engine, and the P12 Battery Charger ports associated with ACR 2

*The ML-ACRs also support “Engine Isolation” which keeps an ACR open if two engines are running simultaneously. Operating in this mode while using Charger Coordination requires a special installation. See bluesea.com/P12 for details.

SI ES	ES SI
ACR 1	ACR 2
SI: Start Isolation (ACR)		Temperature	Remote
ES: Engine Start Switch		Sensor	Display

OPTIONAL CONNECTION

	ENGINE
	START
	SWITCH	ON
		START
		OFF
ML-Series	START
Automatic
Charging
Relay
A	B	HOUSE
		START ISOLATION #1 (BROWN)

START ISOLATION #2 (GREEN)

ENGINE ISOLATION #3 (ORANGE)

GROUND (BLACK)

OPTIONAL CONNECTION

SI ES	ES SI			ENGINE
ACR 1	ACR 2
SI: Start Isolation (ACR)		Temperature	Remote	START
				SWITCH	ON
ES: Engine Start Switch		Sensor	Display		START
					OFF
ML-Series
Automatic
Charging				START
	Relay
			7520
			BATTERY CHARGER LED REMOTE
A	B		ISOLATION #1 (BROWN)

ISOLATION #2 (GREEN)

ISOLATION #3 (ORANGE)

GROUND (BLACK)

DC GROUND

Specifications are subject to change. See bluesea.com/P12 for current information. 23