Questions and Answers
AHU 3 is supplied by Panelboard ? and Circuit ?.
The control diagram for Air Handler Unit 3 (AHU 3) is located on which sheet?
M21
AHU 3 is located on which level?
Mezzanine
AHU 3 is located just south of which column?
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What is the motor size and voltage for AHU 3?
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What type and how many area type lights are used on the mezzanine level?
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On Mechanical Sheet M2, what does the symbol labeled EF-5 represent?
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What are the voltage requirements of EF-5?
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What two door sizes are needed for the basement electrical room (Room 1.3)?
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What do the symbols 'DD' in a rectangle represent on the mezzanine power plan?
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How many 5-horsepower motors are located in the cooling tower?
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What is located in the area shown as 'Electrical Space' on Sheet M8?
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Where is the remote emergency generator panel located according to Sheet E7?
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On which drawing can the necessary pipe and wire size information for Air Handling Units 1 through 11 be found?
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On which drawing would one find the necessary panelboard circuit information for Air Handling Units 1 through 11?
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Between which two column lines do the 10 main mechanical piping lines run in Work Area A-D 1-3?
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What type of lighting is used in the catwalk area?
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What type of conduit is used for all exposed raceways in Etch Room 4.1?
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What is the rating of the high pressure rinse pump supplied by Panelboard MSB2, Circuit 16?
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What is the name of the room supplied by Panelboard MSB2, Circuit 15?
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What does the outlet supplying countertops in Lab 15.1 consist of?
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Where is the PIV located according to Drawing E9?
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What are the dimensions of the HVAC ductwork from AHU 4?
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How is the damper motor symbol described on the HVAC prints?
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Study Notes
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).
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Description
Test your knowledge on the operational aspects of AHU 3, including its power specifications and control diagrams. This quiz explores the mechanical components, location, and specific details related to exhaust fans and lighting systems. Perfect for students and professionals in HVAC and mechanical engineering.
