Electrical and Mechanical Systems Overview Quiz

Electrical and Mechanical Systems Overview

• AHU 3 is powered by an unspecified panelboard and specific circuit noted as EE / 3.(E18).
• Control diagram for AHU 3 is detailed on Sheet M21.
• Primary reasons for consulting the control diagram include:
  • Identifying control devices that operate various motors
  • Understanding the sequence of operations
  • Pinpointing components of the system.

Location and Specifications of AHU 3

• AHU 3 is situated on the mezzanine level (E14) and is located south of Column C (E13).
• The unit operates with a motor rated at 25 HP, 3-phase, 480 V (E14).
• Mezzanine uses 32 area type "E" lights, incorporating both normal and emergency luminaries (E13).

Mechanical Components and Plans

• Exhaust Fan 5 (EF-5) is represented on Mechanical Sheet M2 by a square with a diagonal line, indicating a return/exhaust grille (M1).
• EF-5 requires a 3-phase power supply of 480 V, 60 Hz (M17).
• The Main Switchboards are located in an area labeled "Electrical Space" on Sheet M8.

Electrical Room and Panel Specifications

• Two doors for the basement electrical room (Room 1.3) both need to measure 3'0" × 7'0" × 1 3/4" (A8).
• Each air handling unit on the mezzanine is equipped with duct-mounted smoke detectors connected to the fire alarm system (E16).
• The cooling tower contains 2 motors, each rated at 5 horsepower (E23).

Emergency Power and HVAC Coordination

• The remote emergency generator panel is found located in Room 13.9 (A2).
• Necessary pipe and wire size information for Air Handling Units 1 through 11 can be found on drawing E14.
• Panelboard circuit details for AHUs 1 through 11 are outlined in drawing E18.

Mechanical Piping and Lighting

• Main mechanical piping lines run between column lines C and D at areas 1, 2, and 3 (M5).
• Catwalk area features a bare lamp strip, 4' long, pendant-mounted Lithonia fixture CS240, powered at 277 V (E15).

Conduit and Rinse Area Specifications

• PVC is used exclusively for all exposed raceways in Etch Room 4.1 (E6).
• In the high-pressure water rinses area, Panelboard MSB2, Circuit 16 powers a 125 hp rinse pump (E6).
• Circuit 15 on the same panelboard supplies a large rinse pump control/starter/disconnect unit located in the Inspection and Packing Room (A1).

Outlet Configurations and Location Indicators

• In Lab 15.1, countertop outlets are configured as multi-outlet assemblies with 120-V 20-A outlets positioned 8" above the countertop (E7).
• The post indicator valve connection referenced on Drawing E9 is located outside the north building wall, aligned with Column 4 (E1).

Ductwork and Symbol Indicators

• The ductwork from AHU 4, positioned below Column Line C, measures 46" by 46" (M2).
• In HVAC prints, a damper motor is symbolized as a square with an upper case "M" inside it (M1).