E5.1 ONE LINE DIAGRAM.pdf

522 KB Posted

Attached to
Chillers & Chilled Water Pump Upgrades
Solicitation number
RFQ ABS 260000000308 3
Issued by
Michigan

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This is a One Line Diagram document for the Anchor Bay School District's MacOnce Elementary School HVAC Upgrade project located at 5201 County Line Road, Casco, Michigan 48064. The diagram, prepared by Peter Basso Associates, illustrates the electrical distribution system for the HVAC upgrade construction work. The document is dated May 22, 2026, and represents construction documents issued under Addendum No. 1. The one-line diagram depicts two configurations: one showing the demolition phase and another showing the new work phase. The electrical system includes a main switchboard (MDP) rated at 480Y/277V, 3-phase, 4-wire, 1200A capacity with ground fault protection (GFP). The system incorporates a 30KV-480Y/277V transformer, a 480V motor control center (MCC-1) rated at 300A, and multiple load panels (LP-A and LP-B) with various circuit breakers ranging from 30A to 600A serving HVAC equipment including air handling units (AHU), cooling units (CU), exhaust fans (EF), supply fans (SF), roof fans (RF), and circulation pumps (CP).

The new work configuration shows a total connected load of 515 KVA with an added load of 406 KVA, resulting in a metered load of 507 KVA at the main switchboard. The diagram includes detailed circuit protection sizing throughout the distribution system, with variable frequency controllers (VFC) integrated into specific branch circuits. Additional panels include an RP-CC unit serving AHU-2 with 1 KVA capacity and an MDP at CH-1 with 7 KVA capacity. The system design incorporates spare capacity for future expansion across multiple panels and includes proper coordination with the motor circuit protection and feeder sizing schedules referenced in the electrical standard schedules drawing, as required by the general notes on the diagram.

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Other files

File Type Posted
ABSD Chillers & CHWP RFP Bid Notice 051526.pdf PDF
M7.2 MECHANICAL SCHEDULES.pdf PDF
Lottie Temperature Controls.jpg JPG image
Exhibit D. Lighthouse Elementary MEP Drawing Set (1).pdf PDF
Maconce Temperture Controls.jpg JPG image
Anchor Bay Schools 2025 Energy Services Performance Contract - M&E Specifications for Construction Documents.pdf PDF
Exhibit H. Residual Value and Disposition of Existing Chillers.pdf PDF
Exhibit E. Lottie Schmidt MEP Drawing Set (1).pdf PDF
Exhibit A. Subcontractor Master Agreement.pdf PDF
ED0.3 ELECTRICAL COMPOSITE DEMOLITION PLAN.pdf PDF
MacDonald Temperature Controls.jpg JPG image
Lighthouse Temperature Controls.jpg JPG image
Exhibit C. M&E Specifications for Construction Documents.pdf PDF
Exhibit G. Maconce Elementary MEP Drawing Set (1) (1).pdf.bz2 BZ2 file
Anchor Bay School District - Chillers RFP Ph 1_May 15 2026.pdf PDF
E0.3 ELECTRICAL COMPOSITE NEW WORK PLAN.pdf PDF
E0.2 ELECTRICAL STANDARD SCHEDULES.pdf PDF
Addendum 1 - ABSD - Chillers & CHW Pumps RFP Phase 1.pdf PDF
Exhibit F. MacDonald Elementary MEP Drawing Set (1).pdf PDF
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%%UDIAGRAM GENERAL NOTES:

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1. THESE DRAWINGS REPRESENT THE GENERAL EXTENT AND ARRANGEMENT OF THESE DRAWINGS REPRESENT THE GENERAL EXTENT AND ARRANGEMENT OF SYSTEMS. COORDINATE EXACT EQUIPMENT LOCATIONS, ELEVATIONS, AND FINAL CONNECTION REQUIREMENTS. PROVIDE EACH SYSTEM COMPLETE, INCLUDING ALL NECESSARY COMPONENTS, FITTINGS AND OFFSETS. 2. FEEDER AND BRANCH CIRCUIT CONDUCTORS SHALL BE SIZED IN ACCORDANCE WITH FEEDER AND BRANCH CIRCUIT CONDUCTORS SHALL BE SIZED IN ACCORDANCE WITH THE "FEEDER AND BRANCH CIRCUIT SIZING SCHEDULE-GENERAL PURPOSE" ON THE "ELECTRICAL STANDARD SCHEDULES DRAWING" UNLESS SPECIFICALLY NOTED OTHERWISE. 3. MOTOR CIRCUIT PROTECTION SHALL BE SIZED IN ACCORDANCE WITH THE MOTOR MOTOR CIRCUIT PROTECTION SHALL BE SIZED IN ACCORDANCE WITH THE MOTOR CIRCUIT SIZING SCHEDULES ON THE "ELECTRICAL STANDARD SCHEDULES DRAWING" UNLESS SPECIFICALLY NOTED OTHERWISE.

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EMU

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SPD

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(E)MAIN SWITCHBOARD MDP 480Y/277V 3%%C, 4W, 1200A

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1200A 3P GFP

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(E)T-RP-COMP 30KV-480Y/277V 3 , 4W

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NO SCALE

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%%UONE LINE DIAGRAM - DEMOLITION

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(E)RDP

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(E)LP-A

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SPACE

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SPARE

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(E)MCC-1 480V 3%%C, 3W, 300A

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VFC

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(E)LP-B

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VFC

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SPARE

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SPACE

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SPARE

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AHU

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CP

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CP

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CP

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CP

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SPACE

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SPACE

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SPACE

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SPACE

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CU

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EF

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EF

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CP

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AHU

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RF

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AHU

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SF

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AHU

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RF

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AHU

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AHU

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SF

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AHU

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SF

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AHU

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RF

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CH

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EMU

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SPD

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(E)MAIN SWITCHBOARD MDP 480Y/277V 3%%C, 4W, 1200A

AutoCAD SHX Text 60A 3P

AutoCAD SHX Text 400A 3P

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1200A 3P GFP

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(E)T-RP-COMP 30KV-480Y/277V 3 , 4W

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NO SCALE

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%%UONE LINE DIAGRAM - NEW WORK

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(E)RDP

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(E)LP-A

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SPARE

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(E)MCC-1 480V 3%%C, 3W, 300A

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VFC

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(E)LP-B

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VFC

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SPACE

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SPARE

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AHU

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CP

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CP

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CP

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SPACE

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SPACE

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SPACE

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SPACE

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EF

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EF

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CP

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AHU

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RF

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AHU

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SF

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AHU

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RF

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AHU

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SF

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AHU

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SF

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AHU

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RF

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CH

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CU

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CP

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CONNECTED LOAD CALCULATION

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ADDED LOAD

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MAIN SWITCHBOARD METERED LOAD 406 (1.25)

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507 KVA

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MAIN SWITCHBOARD

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TOTAL CONNECTED LOAD

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515 KVA

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MDP (CH-1)

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7 KVA

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RP-CC (AHU-2)

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1 KVA

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VFC

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VFC

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SPACE

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(E)RP-C

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(E)RP-CC

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(E)RP-C

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(E)RP-CC

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AutoCAD SHX Text g:\2026\2026-0034-00\CAD\53 maconce es hvac upgrade\2026-0034-53-E5-DG.dwg, E5.1, 5/22/2026 9:46:36 AM, Nathan D.B. Hand, Peter Basso Associates Inc., E5.1, 5/22/2026 9:46:36 AM, Nathan D.B. Hand, Peter Basso Associates Inc.E5.1, 5/22/2026 9:46:36 AM, Nathan D.B. Hand, Peter Basso Associates Inc., 5/22/2026 9:46:36 AM, Nathan D.B. Hand, Peter Basso Associates Inc.5/22/2026 9:46:36 AM, Nathan D.B. Hand, Peter Basso Associates Inc., Nathan D.B. Hand, Peter Basso Associates Inc.Nathan D.B. Hand, Peter Basso Associates Inc., Peter Basso Associates Inc.

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CONSULTING ENGINEERS

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