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

Author Question: In Figure 39-34, what is the difference between emergency heat operation and normal second stage ... (Read 16 times)

nevelica

  • Hero Member
  • *****
  • Posts: 563
on: Jul 26, 2018
In Figure 39-34, what is the difference between emergency heat operation and normal second stage heat operation?
 
  What will be an ideal response?

Question 2

List the associations that establish national standards for the HVACR industry.
 
  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

dreamfighter72

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Jul 26, 2018
Answer to Question 1

The heat strips are the first stage heat in emergency heat and the compressor does not operate. When they are the second stage in normal operation, they are energized in addition to the compressor.

Answer to Question 2

ARI - Air Conditioning and Refrigeration Institute
ASHRAE American Society of Heating Refrigeration and Air Conditioning
Engineers
ASME - American Society of Mechanical Engineers
UL - Underwriters Laboratories
NFPA - National Fire Protection Association


nevelica

  • Member
  • Posts: 563
Reply 2 on: Jul 26, 2018
Great answer, keep it coming :)

kishoreddi

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Pericardial effusion: A, normal pericardial sac; B, pericardial sac with excess fluid possibly causi Pericardial effusion: A, normal pericardial sac; B, pericardial sac with excess fluid possibly causi
Ranges of normal temperature values Ranges of normal temperature values
Mean scores for Erikson’s stage VI (Intimacy) for two cohorts. Scores for both cohorts increase ... Mean scores for Erikson’s stage VI (Intimacy) for two cohorts. Scores for both cohorts increase ...
Identical Twin Normal Birth Position Identical Twin Normal Birth Position
A bell-shaped, or “normal,” curve shows the distribution of phenotypes for traits controlled by ... A bell-shaped, or “normal,” curve shows the distribution of phenotypes for traits controlled by ...
The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ... The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ...
Video: Mendel's Pea Experiment

For a complete list of videos, visit our video library