This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: When will a preheater turn on? What will be an ideal response? ... (Read 27 times)

hubes95

  • Hero Member
  • *****
  • Posts: 561
on: Jul 26, 2018
When will a preheater turn on?
 
  What will be an ideal response?

Question 2

What acts as the primary control for all HVACR functions in a DDC system?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

meltdown117

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 26, 2018
Answer to Question 1

The preheater will turn on when the incoming air drops below a pre-set temperature. This should be well above the freezing temperature of the coil that may vary from system to system depending on the amount of glycol added to the chill water loop.

Answer to Question 2

A computer.


hubes95

  • Hero Member
  • *****
  • Posts: 561
Reply #2 on: Jul 26, 2018
Thank you!


meltdown117

  • Sr. Member
  • ****
  • Posts: 326
Reply #3 on: Jul 26, 2018
Always glad to help...


« previous next »
 

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

The three stages of a specific immune response. The three stages of a specific immune response.
Immune Response Immune Response
Frequency distribution curve: interpatient variability in drug response Frequency distribution curve: interpatient variability in drug response
The oxygen sensor provides a quick response at the stoichiometric air–fuel ratio of 14.7:1. The oxygen sensor provides a quick response at the stoichiometric air–fuel ratio of 14.7:1.
The inhibitory response of rods to light. When light bleaches rhodopsin molecules, the rods’ ... The inhibitory response of rods to light. When light bleaches rhodopsin molecules, the rods’ ...
Conservation biology arose in response to biodiversity loss Conservation biology arose in response to biodiversity loss
Video: Isovolumetric VC, Ventricular ejection, Isovolumetric & Passive ventricular filling

For a complete list of videos, visit our video library