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BCT 102

BCT 102. Residential Print Reading Week 10. MEP “Mechanical Electrical & Plumbing” … work coordinates with all other trades. *. “Mechanical & Plumbing” Mechanical - HVAC (Heating Venting and Air conditioning).

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BCT 102

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  1. BCT 102 Residential Print Reading Week 10

  2. MEP“Mechanical Electrical &Plumbing”…work coordinates with all other trades *

  3. . “Mechanical & Plumbing” • Mechanical - HVAC (Heating Venting and Air conditioning). • Electrical – lighting fixtures, switches, outlets, panels, appliances, etc. • Plumbing - pipes, fixtures & fittings; water supply/distribution, and waste removal.

  4. MechanicalHVAC * SIMPLIST FORM….

  5. Mechanical System- Common types 1.Central Forced air (Furnace/fan blower /condenser & compressors; ducts; registers/diffusers) Heat Pump – Heat & Cooling within One unit Most Common type of Heating/Cooling* takes heat out of inside air (cooling) or takes heat out of outside air to heat bldg. 2.Hydronic Hot Water system (Boilers/pipes supply hot water to Radiators/Baseboards/or tube arrays below floor – YOUR TERMINAL UNITS – RADIANT Type Heat exchange) 3.Radiant (Control surface temp. of heating panel or Floor at the heat source Uniform heat/reduced air movement) use Electricity to heat Coils under floor or Piped hot (or cold) water to radiate heat

  6. Forced Air Furnace heat house thru convection Two part system : central heating device-Furnace + distribution network-Ducts Fan blows heated air from the heat exchanger into supply Plenum smaller branch ducts tap into plenum air supply flows to Diffusers (in ceiling or floor registers). Air return grills centrally located picks up return air and carries it back to furnace via return duct into a return air plenum Gas Furnaces have exterior air intake and exhaust for the combustion chamber

  7. Heat pump Heat pump extracts heat from space at low temp & discharges it to another space at a higher temp 2 heat exchangers, a compressor & expansion valve & interconnecting pipes filled with refrigerant. Reversing the direction of the refrig. Flow system can either heat or Cool Compressor sits outside the house on a concrete pad feeding the chilled refrig. to fan coil units

  8. Condition the air using Nature: • Cross ventilation (open windows) • Stack effect (heat rises so remove it from Roof area/vent opening skylights) • Ceiling fans (or whole house fan work With stack effect) • Block solar heat gain (overhangs & low E insulated glass) • Heat-storing (like concrete /masonry absorb heat & release heat slowly

  9. Mechanical System-Forced CONDITIONED Air Furnace feed heated air through ducts & deliver it to registers(or diffusers) Return air to system through return grills separtated from diffuser.

  10. Mechanical System-Forced Furnace/ducts & registers….Air intake to furnace & exhaust

  11. Mechanical System- forced air thru ducts delivered at the supply register (@ floor or ceiling) Heat pumps-One unit heats & cools 11

  12. Mechanical System-Hydronic ………………..Hot water Boiler/pipes & Radiators or Terminal unit TU

  13. Radiant Floor in Detail Section

  14. Heat pump hooked up to furnace with thermostat Zones Provide Flexibility/ temperature reading.

  15. Mechanical System- Zones Provide Flexibility/Efficiency – Control temperature of Areas (or rooms) individually with thermostats and Dampers Thermostats The control for Heating & Cooling Should be centrally located in zoned area or house to give an average temperature reading.

  16. Mechanical symbols in a legend on the dwg. • s .

  17. Duct layout for forced-air system

  18. Duct layout for forced-air system

  19. RETURN AIR GRILL SUPPLY DIFFUSER (REGISTER) Simple HVAC layout in a ceiling plan - give register locations…heat registers often near cold area – windows; return grill centrally located in hall

  20. . Plumbing

  21. . Plumbing …is your Water distribution System • Waste disposal (sanitary sewage) DRAIN WASTE VENT or DWV • Supply -Pipes for Heat/Cold water • …. gas gets piped too!

  22. ... sewage disposal is life safety issue. • Lic. Plumber installs system in accordance with specs and local codes

  23. Water Meter Housing

  24. Water Meter

  25. supply • Water enters the house in ¾” to 1” pipe • Pressure Reduction Valve • 80psi coming in • Reduce to 25 -30psi

  26. Pressure Reduction Valve

  27. ... sewage disposal is life safety issue. Waste lines… • Lic. Plumber installs system in accordance with specs and local codes ...for Houses pipe layout (DWGS.) are not required as fixtures & fittings are located on plans .... Riser diagrams are! For inspector to see adequate connections and pipe sizes

  28. STACKS HOUSE & SEWER DRAINS TRAPS VENT STACKS & PIPES DRAIN PIPING Sewer Line Building Drain

  29. VTR ... sewage disposal • P-trap & Air-vent for waste disposal system to work • Slope of waste lines ¼” : 1’ • Vent Through Roof VTR

  30. P-Trap DWV

  31. S-Trap and Drum Traps DWV

  32. Trap Facts • All plumbing fixtures require traps • All traps require vents • A critical distance must be maintained between the trap weir and the nearest vent

  33. P-Traps DWV

  34. P-Traps DWV

  35. Vents • Max. Distance of fixture trap from vent • 1 ¼” Trap 60” • 1 ½” Trap 72” • 2” Trap 96” • 3” Trap 144” • 4” Trap 192”

  36. Vents • What happens when the vent is too far from the trap? • Three options • Increase the size of the trap • Re-Vent • Bow Vent (Loop Vent) • Automatic Vent

  37. Supply Lines - Pipes shown & Abbrev. Text

  38. WASTE STACK Plumbing 3 stages of construction • Service entrance (prior to FND. Concrete pour) • Rough-in plumbing(piping/drains - Inspected) • Finished plumbing install fixtures & connections (follow GYP. Walls) Plumbing hidden in the walls...

  39. Plumbing 3 stages of construction • Service entrance (prior to FND. Concrete pour) • Rough-in plumbing(piping/drains - Inspected) • Finished plumbing install fixtures & connections (follow GYP. Walls) Plumbing hidden in the walls...

  40. . AT STREET Plumbing AT HOUSE

  41. Sewage Disposal - Sewer or Septic (AT at the street… 44

  42. Sewage Disposal - Sewer or Septic 45

  43. Plumbing symbols found in legend on plumbing drawings • symbols can vary Text

  44. Plumbing – Waste or DWV – Riser diagram or Single line Dwg. shows pipe & air vent layout & sizes ...could be required for Permit (Pipe Diam. shown) VTR vent thru roof C.O. clean out

  45. Plumbing - PIPE LAYOUT ....Supplyjust showing hot/cold system from water heater (not as common in print set) .

  46. Single-line dwg. RISER DIAGRAM Required Dwg. Pictorial to understand single-line dwg.

  47. Plumbing for hydronic heat – like this kitchen base cabinet toe kick heater or radiant floor piping Required Dwg. Pictorial to understand single-line dwg.

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