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 37 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
Excellent

nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Identify each stage of the life cycle Identify each stage of the life cycle
An emergency department physician at work An emergency department physician at work
Block Diagram of Single-stage Pressure System for Dual-Stage Pressure Production of Nitric Acid Block Diagram of Single-stage Pressure System for Dual-Stage Pressure Production of Nitric Acid
The anatomical distortion of the structure of RBCs in sickle cell anemia affects its normal function ... The anatomical distortion of the structure of RBCs in sickle cell anemia affects its normal function ...
Pressure drop after 10 minutes on a normal port fuel-injection system. Pressure drop after 10 minutes on a normal port fuel-injection system.
Stage 2: Synthesis of Squalene from Mevalonate Stage 2: Synthesis of Squalene from Mevalonate
Video: Deglutition

For a complete list of videos, visit our video library