Magnum Energy MM Series Installation And Operation Manual

Contents

Magnum Energy MM Series Installation And Operation Manual Manual pdf 17 page image

©2006 Magnum Energy Inc.Wiring Guidelines• Before connecting any wires, determine all wire routes throughoutthe home or vehicle/boat both to and from the inverter.• Conductors passing through walls, bulkheads or other structuralmembers must be protected to minimize insulation damage such aschafing, which can be caused by vibration or constant rubbing.• Always check for existing electrical, plumbing or other areas ofpotential damage prior to making cuts in structural surfaces, bulk-heads or walls.• Make sure all wires have a smooth bend radius and do not becomekinked.• Both AC and DC overcurrent protection must be provided as partof the installation.• Do not attempt to use a vehicle metal frame in place of the DCnegative connection or DC ground. The inverter requires a reliablenegative and ground return path directly to the battery.• DC wires and cables should be tied together with wire ties orelectrical tape approximately every 6 inches. This helps improves thesurge capability and reduces the effects of inductance, which im-proves the inverter waveform and reduces the wear of the inverter’sfilter capacitors.• Use only copper wires with a minimum temperature rating of 75° C.• To ensure the maximum performance from the inverter, all connec-tions from the battery bank to the inverter should be minimized, theexception is the DC overcurrent disconnect in the positive line and ashunt in the negative line. Any other additional connection willcontribute to additional voltage drops and these extra connectionspoints may loosen during use.• All wiring to the battery terminals should be checked periodically(once a month) for proper tightness. The torque requirement for theDC terminals is between 10 to 12 foot-pounds. If you don’t have atorque wrench, ensure all DC terminals are tight and cannot move.DC WiringThis section describes the inverter’s required DC wire sizes and therecommended disconnect/overcurrent protection and how to make theDC connections to the inverter and the battery bank.DC Wire Sizing and Overcurrent ProtectionIt is important to use the correct DC wire to achieve maximumefficiency from the system and reduce fire hazards associated withoverheating. See Table 1 to select the minimum DC wire size neededbased on your inverter model. If the distance from the inverter to thebattery bank is greater than 3 feet, use Table 2 to help determine theminimum recommended cable sizes for longer distances. Always keepyour wire runs as short as practical to help prevent low voltageshutdowns and keep the DC breaker from nuisance tripping (or openfuses) because of increased current draw. Undersized cables can alsolower the inverter’s peak output voltage as well as reduce its ability tosurge heavy loads.• Be aware that overtightening and misthreading the nuts on the DCterminals can cause the bolts to strip and snap/break off.2.0 Installation11http://www.wholesalesolar.com/inverters.htmlhttp://www.wholesalesolar.com/inverters.html