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MNSOB Shut Off Box Instructions MNSOB4X-4P MNSOB3R-4P ETL Approved to: UL 1741, Issue:2010/01/28 Ed:2 INVERTERS, CONVERTERS, CONTROLLERS AND INTERCONNECTION SYSTEM EQUIPMENT FOR USE WITH DISTRIBUTED ENERGY RESOURCES CSA C22.2#107.1, Issue:2001/09/01 Ed:3 General Use Power Supplies - (R2011) The MNSOB Shut off boxes provide a Rapid System Shutdown as required by NEC 690.12.
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GENERAL PRECAUTIONS If service or repair should become necessary, contact MidNite Solar Inc. Improper servicing may result in a risk of shock, fire or explosion. To reduce these risks, disconnect all wiring before attempting any maintenance or cleaning.
........................... 15 Disclaimer of Liability MidNite products are not intended for use in connection with Life Support Systems. MidNite Solar makes no warranty or representation in connection with their products for such uses. Since the use of this manual and the conditions or methods of installation, operation, use of the Shut Off Box(es)
MNSOB3R-2P ---- 2 position, internal conductor rating 20A, switch 100A per pole continuous, NEMA 3R MNSOB4X-4P ---- 4 position, internal conductor rating 20A, switch 100A per pole continuous, NEMA 4X MNSOB3R-4P ---- 4 position, internal conductor rating 20A, switch 100A per pole continuous, NEMA 3R Installation NOTE: The deadfront is marked as a photovoltaic combiner.
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Use of other screw types will compromise the seal and should not be used. Tighten hole plugs firmly on 4X units with MidNite Solar tool part number 5-151-1 or similar tool. Tighten from the inside of the Shut Off Box to avoid twisting the gasket.
• Able to disconnect multiple PV Disco Combiners. • Firefighter approved. • 600V Cat 5 USE-2 90°C cable available from MidNite Solar. When using the Birdhouse with any of the DISCO combiners, you must also add the MNDISCOPSB Power Supply Board.
You will need: 3/16” Slotted screwdriver Wire strippers Wire crimper to attach lugs ¼” Nutdriver #1 Phillips screwdriver Included in the MNDISCOPSB Kit: Description MidNite Solar PN MNDISCOPSB 8-037-10 Formex Insulator 5-144-1 2 Ft Wire #18 AWG Red 9-367-1 Ring Terminal #18-22 AWG...
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MNSOB Shut Off Box Instructions (continued) Step 1: Remove the top cover and deadfront (Page 3). Step 2: Remove plastic supports (2) by removing screws from the back side of the Shut Off Box. Set aside to reinstall later. Step 3: Place the Formex insulator as shown. Step 4: Install metal standoffs (2) and reinstall plastic PCB supports removed in Step 1.
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MNSOB Shut Off Box Instructions (continued) Step 6: Secure board with 6-32 screws (2). Loosen wire bundle from switch. Trim wires to 5” and strip ¼” on ends. Step 7: Connect the two black wires to The left side of the terminal block marked “BK1”...
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MNSOB Shut Off Box Instructions (continued) Step 9: Wire the PSB as shown in the picture; shows 4P SOB switch. Red wires – Sends switch Red and black wires tap PV + and – off the switch, sends position signal to the Birdhouse. Black wires –...
MNSOB Shut Off Box Instructions (continued) Wiring Diagrams Terminal blocks on all MNSOB models: Strip length 0.35” (9 mm) Tightening torque, min 5.3 Oz-In (0.6 Nm) Tightening torque max 7 Oz-In (0.8 Nm) 1 Channel SOB provides one 600V positive MPPT Channel 2 Channel SOB provides one 600V Transformerless MPPT Channel 11 | P a g e...
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MNSOB Shut Off Box Instructions (continued) 2 Channel SOB provides two 600V positive MPPT Channels 4 Channel SOB provides two 600V Transformerless MPPT Channels 12 | P a g e 1 0 - 2 8 3 - 1 R E V : B...
MNSOB Shut Off Box Instructions (continued) Appendix A MNSOB3R MNSOB3R Bottom and side knockout location and size. Not to scale. 13 | P a g e 1 0 - 2 8 3 - 1 R E V : B...
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MNSOB Shut Off Box Instructions (continued) MNSOB4X MNSOB4X Bottom and side knockout location and size. Not to scale. 14 | P a g e 1 0 - 2 8 3 - 1 R E V : B...
MidNite Solar offers an extended warranty for all the Classic MPPT charge controllers. Six months prior to the end of the warranty period customers can ship their Classic back to MidNite Solar with a check for $147 dollars plus shipping and we will replace any wearable parts and do a general tune-up. This will extend the warranty by 2 additional years.
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MNSOB Shut Off Box Instructions (continued) All MidNite Solar products are assembled under the watchful eye of MidNite the Cat. 16 | P a g e 1 0 - 2 8 3 - 1 R E V : B...
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