DDC Control Loops

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.
ONLINE COURSES:
Certified HVAC Piping Estimator: courses.mepaca...
ESTIMATING SPREADSHEETS
✅ #1 HVAC & Plumbing Estimating Spreadsheet: mepacademy.gum...
✅ HVAC Estimating Spreadsheet: mepacademy.gum...
✅ Plumbing Estimating Spreadsheet: mepacademy.gum...
✅ Residential Estimating Spreadsheet: mepacademy.gum...
CONSTRUCTION PROPOSAL TEMPLATE
✅ mepacademy.gum...
NEWSLETTER & TH-cam SUBSCRIBE
✅ Subscribe for more Videos like this: bit.ly/3J21zXL
✅ Signup for our FREE Engineering/Construction Newsletter: eepurl.com/hJGcTL
✅ Watch our most recent videos: / mepacademy
------------------- SOCIAL ------------------
⚙️ MEP Academy Website - mepacademy.com
⚙️ Twitter - / mep_academy
⚙️ Facebook: / mechanicaltrades
--------IMPORTANT VIDEOS TO WATCH---------
HVAC ENGINEERING and CALCULATIONS
💧How to Calculate Motor Break Horsepower: • How to Calculate Motor...
💧Fan Laws, Calculate CFM, SP, RPM, HP: • Fan Laws How to Calcul...
💧How to Calculate Static Pressure and CFM: • How to Calculate Stati...
💧Condensate Piping Design and Sizing: • Condensate Piping Desi...
💧How do you define a BTU or Tons of AC: • What is a BTU or Ton o...
💧Sensible Heat Transfer Equation for Water: • Sensible Heat Transfer...
💧Sensible Heat Transfer Equation for Air: • Sensible Heat Transfer...
💧Sensible and Latent Heat Transfer Formula for Air: • Sensible and Latent He...
CHILLERS and COOLING TOWERS
💧How Chillers Work, Air-Cooled & Water-Cooled: • How Air and Water Cool...
💧Chiller IPLV Calculation: • Chiller IPLV Calculation
💧Calculate Total BTU of Chiller or Coil: • How to Calculate Total...
💧Calculate GPM or TDH of Chiller or Coil: • How to calculate GPM o...
💧How Cooling Towers Work, Crossflow vs Counterflow: • How Cooling Towers Wor...
REFRIGERATION and REFRIGERANTS
💧How Electronic Expansion Valves Work: • How Electronic Expansi...
💧Refrigeration Cycle: • Refrigeration Cycle 101
💧Refrigerant Piping Insulation: • Refrigerant Piping Ins...
💧New Refrigerants, Codes and Standards: • New Refrigerants Codes...
HVAC SYSTEMS
💧How a Variable Air Volume System Works: • How a Variable Air Vol...
💧Rooftop Packaged HVAC Units Explained: • Rooftop Packaged HVAC ...
💧How Heat Pumps Work: • How Heat Pumps Work Ai...
💧How a Condensing Boiler Works: • How a Condensing Boile...
ESTIMATING
💧HVAC Piping Unit Pricing: • HVAC Piping Unit Pricing
💧HVAC Equipment Cost Database: • HVAC Equipment Cost Da...
💧MEP Estimating Spreadsheet: • HVAC and Plumbing Cons...
💧Construction Labor Rates with Burden: • How to Figure Construc...
HYDRONICS and PIPING
💧How to Read Pump Chart and Select Pump: • How to Read Pump Chart...
BUSINESS - CONSTRUCTION & CONTRACTING
💧Bid Bonds and Performance Bonds: • Construction Bid Bond ...
💧Top 3 Things to Know Before Bidding Commercial Projects: • Top 3 Things to Know B...
💧Top 12 Construction Bidding Websites: • Top 12 Construction Bi...
CONSTRUCTION BASICS
💧General Layout of Construction Drawings: • General Layout of Cons...
💧How to Read Specifications: • How to Read Constructi...
ELECTRICAL and CONTROLS
⚡How Variable Frequency Drives Work in HVAC Systems: • How Variable Frequency...
⚡How a Power Factor Works: • How a Power Factor Works
⚡Ohms Law: • Ohm's Law
⚡3Phase Electricity - How it Works: • 3 Phase Electricity Ho...
VARIABLE REFRIGERANT FLOW
💧VRF Videos: / @vrfwizard
#MEPAcademy #HVAC #Engineering

[@MEPAcademy]

Estimating Spreadsheets and Construction Forms: mepacademy.gumroad.com

[@olegluzanov6012]

Greate video. Please make more videos on control logic. Thank you

[@MEPAcademy]

Thanks, will do!

[@brlinf06398]

your videos are just too good

[@MEPAcademy]

I'm glad you enjoy them!

[@jlimg5215]

Please more videos on controls logics, thanks!

[@MEPAcademy]

Will do. Thanks for watching.

[@k.y22]

great great . thank a lot sir. 👍👍👍👍👍

[@MEPAcademy]

Most welcome. Thanks for watching.

[@brlinf06398]

basically the second example where it uses open loop, it predicts how much heat is needed, so if the reset schedule says that a lot of heat is needed, it will try to output higher temperature (makes sense because it would speed up the heat exchange in the coil further requiring less fluid and less pump usage)

[@MEPAcademy]

Thanks for watching.

[@tahernabieh6096]

GREAT VIDEO THANKS A LOT FOR YOUR VEDIO

[@MEPAcademy]

You are welcome!

[@jakup10]

Very good video thank you

[@MEPAcademy]

Glad you enjoyed it Thanks for watching.

[@brlinf06398]

"what's that"
"*discharge air temperature" 😂

[@MEPAcademy]

Thanks for watching.