MAX CHARGE MC-612-DUALMULTI-STAGE VOLTAGE REGULATORWITH DUAL FIELD OUTPUTINSTALLATION AND OPERATION MANUALBALLARD COMMERCIAL INDUSTRIES, INC.18930 59TH AVE., NE, ARLINGTON, WA 98223ON THE INTERNET: WWW.BALMAR.NET© COPYRIGHT 2009, REVISED 8-23-2011Safety Considerations1. Always disconnect your batterybanks and ensure that switchesare “OFF” prior to installing yourregulator.2. Remove loose-fitting clothing orjewelry, which could become en-tangled in your motor or other ma-chinery prior to installing regulator.3. Wear ANSI-approved safety eye-wear and protective gear.4. DO NOT attempt to modify the reg-ulator. Modifications could result indamage to your charging system,and will void your warranty.5. Do not attempt installation if youare tired or fatigued.6. Ensure that the engine has cooledbefore initiating installation.7. Do not attempt regulator installa-tion while using alcohol or medi-cation that could impair your judg-ment or reaction time.8. Always use the right tool for thejob. Improper tool use may dam-age regulator or your vessel, andcould result in personal injury.9. Take time to read the manual.Equipment damage and possibleinjuries may result from an incom-plete understanding of the installa-tion and operation of the MC-612regulator. If you are unfamiliar withmarine electrical systems, consultwith a licensed marine electrician.IntroductionThe Balmar Max Charge MC-612-DUAL is designed for usein single engine / dual alternator applications where bothalternators are being used to charge the same large batterybank.The MC-612-DUAL provides two field output connectors, two powerinput connectors and two system ground connections, making it pos-sible to use two standard wiring harnesses when connecting to twoalternators.The MC-612-DUAL features selectable preset programs for standardflooded, deep cycle flooded, Optima, gel, and AGM batteries, as wellas a universal factory program for all battery types and a special pro-gram for halogen systems. In addition, the MC-612-DUAL offers abroad range of advanced programming features described later in thismanual.When used in conjunction with optional alternator and battery tempera-ture sensors, the MC-612-DUAL has the ability to monitor temperaturesand respond by increasing or decreasing voltage output to adapt toconditions. By selecting the setting that best suits the application, theuser can provide sensing at two alternators and one battery bank orone alternator and two battery banks. To take the best advantage ofthe MC-612-DUAL and its features, please take the time to read thismanual.Introduction........................... 1Safety Considerations.......... 1Regulator Installation ........... 2Unpacking Box ..................... 2Locate/Mount Regulator ...... 2Basic Wiring Installation ...... 2Regulator Terminal Layout .. 3Installation By Wire ...........4-6Initial Start Up ....................... 6Regulator Operation ............. 7Regulator Display Modes..... 8Using Magnetic Tool............. 9Regulator Programming ...... 9Basic Programming.............. 9Adjust For Battery Type ....... 9Belt Load Manager ............. 10Toggle #2 ALT/BAT Sense .. 10Advanced Programming .... 11Unlock Adv. Programming . 11Adjust Adv. Programs ...... 11-12Default Program Settings .. 12Add’l. Regulator Features .. 13Troubleshooting ............13-15System Wiring Diagram ..... 16Warranty .............................. 16- 1 -