In this video we give examples of open and closed loop sequences of operation used in DDC systems. See how a Supply Air Discharge Temperature sensor works in a closed loop to maintain the supply air temperature set point. See how a Heating hot Water Temperature Reset schedule works with a Boiler to reset the hot water temperature based on the outside air temperature.
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---------IMPORTANT VIDEOS TO WATCH----------
HVAC ENGINEERING and CALCULATIONS
💧How to Calculate Motor Break Horsepower: https://youtu.be/3n9dlmmq4c8
💧Fan Laws, Calculate CFM, SP, RPM, HP: https://youtu.be/txnANkfsg6M
💧How to Calculate Static Pressure and CFM: https://youtu.be/6u5CksPM7Yg
💧Condensate Piping Design and Sizing: https://youtu.be/utA5X9MujXg
💧How do you define a BTU or Tons of AC: https://youtu.be/bsGfxwyUo3c
💧Sensible Heat Transfer Equation for Water: https://youtu.be/JVN9E8jdw8o
💧Sensible Heat Transfer Equation for Air: https://youtu.be/ae2_OTU87jA
💧Sensible and Latent Heat Transfer Formula for Air: https://youtu.be/iME-1I9G4Qw
CHILLERS and COOLING TOWERS
💧How Chillers Work, Air-Cooled & Water-Cooled: https://youtu.be/q-Oooe0G7_c
💧Chiller IPLV Calculation: https://youtu.be/tmOrj3FuSd8
💧Calculate Total BTU of Chiller or Coil: https://youtu.be/8nbyB964-ZY
💧Calculate GPM or TDH of Chiller or Coil: https://youtu.be/h78x7tISOWY
💧How Cooling Towers Work, Crossflow vs Counterflow: https://youtu.be/0I46O8Cnbk4
REFRIGERATION and REFRIGERANTS
💧How Electronic Expansion Valves Work: https://youtu.be/3u_m8LRa3tk
💧Refrigeration Cycle: https://youtu.be/IGqhWn0ZlfU
💧Refrigerant Piping Insulation: https://youtu.be/jadspqwvMmQ
💧New Refrigerants, Codes and Standards: https://youtu.be/ilP72QrVx1g
HVAC SYSTEMS
💧How a Variable Air Volume System Works: https://youtu.be/jXV3i9_QOhQ
💧Rooftop Packaged HVAC Units Explained: https://youtu.be/0XDOoybvXj0
💧How Heat Pumps Work: https://youtu.be/DT-5zYRA4No
💧How a Condensing Boiler Works: https://youtu.be/oRr3q3IraRU
ESTIMATING
💧HVAC Piping Unit Pricing: https://youtu.be/CcXD12JC7jw
💧HVAC Equipment Cost Database: https://youtu.be/Jgwy1mOI2j8
💧MEP Estimating Spreadsheet: https://youtu.be/wwNHuyL82Yc
💧Construction Labor Rates with Burden: https://youtu.be/z0LJperrgjk
HYDRONICS and PIPING
💧How to Read Pump Chart and Select Pump: https://youtu.be/paziP4GdYio
BUSINESS – CONSTRUCTION & CONTRACTING
💧Bid Bonds and Performance Bonds: https://youtu.be/fS9wSvUR1Cc
💧Top 3 Things to Know Before Bidding Commercial Projects: https://youtu.be/qH6hFhEqOMo
💧Top 12 Construction Bidding Websites: https://youtu.be/gM8EmySK-O4
CONSTRUCTION BASICS
💧General Layout of Construction Drawings: https://youtu.be/YVGO6cLqKGQ
💧How to Read Specifications: https://youtu.be/J1qnbg8jdm8
ELECTRICAL and CONTROLS
⚡How Variable Frequency Drives Work in HVAC Systems: https://youtu.be/DymWILTmSNc
⚡How a Power Factor Works: https://youtu.be/6LZk9YT-GkQ
⚡Ohms Law: https://youtu.be/uprC1xHwgaU
⚡3Phase Electricity – How it Works: https://youtu.be/SG9RzXrjYnQ
VARIABLE REFRIGERANT FLOW
💧VRF Videos: https://www.youtube.com/channel/UCf3f-NvZi5d58j0bMiMPteA
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