Magnum Energy AC Load Diversion Controller (ACLD-40) - Manual (Page 16)

Page 9
©
2015 Sensata Technologies
Installation
2.1.1 Considerations when Installing the ACLD System
• The ACLD controller is designed to be connected and powered from the AC output of a battery-
based inverter that provides a MagNet communications port and has an output of 230 or 240
VAC (50 or 60 Hz). Normally this would be the MS-PAE Series (MS4024PAE or MS4448PAE),
but can also connect to the MS-E Series and MS-PE Series inverters.
• The continuous power rating of the inverter (MS-PAE Series) must be at least 10% larger than
the maximum power rating of the renewable energy source. Otherwise, the inverter may be
damaged if required to handle current greater than designed.
• During an AC utility outage, some brands of grid-tie inverters are sensitive and disconnect
when powered from battery-based inverters.
• As required by the NEC, a photovoltaic power system (or small wind electric system) employing
a diversion charge controller of regulating the charging of a battery shall be equipped with a
second independent means to prevent overcharging of the battery. The MS-PAE Series inverters
can provide an automatic frequency-shift feature that disconnects the grid-tie inverter when
high voltage is detected on the battery. Note: This frequency-shift feature is enabled by setting
the battery type to ‘custom’ using a remote control, however, this feature should only be used
as a backup—the ACLD-40 should be used as the primary regulation method.
• A diversion load must be connected to the ACLD to prevent over-charge damage to the
inverter’s battery bank. It must be at least 10% larger than the maximum power rating of the
renewable energy source. See Section 2.9 for information on the ACLD load requirements
.
• As the AC current is being provided by the grid-tie inverter through the sub-panel (i.e., critical
loads panel) into the ACLD, a 30-amp branch rated circuit breaker must be provided from
the sub-panel to the ACLD. Note: The installation can be made easier by using the MMP-30D
Series enclosure. This enclosure provides the required 30-amp overcurrent circuit protection
between the sub-panel and the ACLD controller.
• The ACLD-40 is limited to 4000 watts continuous and is designed to work with a single MS-
PAE Series pure sinewave inverter that has an output voltage of 240VAC. Note: The ACLD-40
cannot be stacked or combined with another ACLD to handle additional power.
2.1.2 Unpacking and Inspection
Carefully remove the ACLD controller from its shipping container and inspect all contents. Verify
the following items are included:
• The ACLD Controller • 6’ yellow communications cable
• ACLD Owner’s Manual • Access panel with hardware
If items appear to be missing or damaged, contact Sensata. If at all possible, keep your shipping
box to help protect your ACLD controller from damage if it ever needs to be returned for service.
Important: Save your proof-of-purchase as a record of your ownership; it will be required
if the ACLD should require in-warranty repair.
Record the unit’s model and serial number in the front of this manual in case you need to provide
this information in the future. It will probably be much easier to record this information now, rather
than trying to gather it after the unit has been installed.
2.1.3 Required Tools and Materials
Hardware/Materials
• Conduit or strain-reliefs and appropriate fi ttings • Mounting bolts and lock washers
• Electrical tape • Wire ties
Tools
• Miscellaneous screwdrivers • Pliers • Wire strippers
• Drill and drill bits • Pencil or marker • Multimeter
• Level • 1/2” wrench