Video notes

Question 1

Good source of supply air begins with a reliable _________

Answer 1

compressor

Question 2

Once the supply air leaves the compressor it passes through the refrigerated ___ ____ and next through the _____ station and out to each of the thermostats

Answer 2

air dryer, filter station

Question 3

The tank of the compressor condenses water and must be drained using an _____ drain

Answer 3

auto

Question 4

Hot moist air leaving the comp must be dehumidified using a refrigerated ___ dryer

Answer 4

air

Question 5

Filter station cleans the air with a _____ and PRV ______ main air pressure to correct pressure

Answer 5

filter, reduces

Question 6

Filter in filter station removes ____ and debris

Answer 6

dust

Question 7

PRV reduces pressure coming from ________ to proper working pressure (100psig to 18psig)

Answer 7

compressor

Question 8

Pneumatic controls are _________ modulating

Answer 8

inherently

Question 9

Inherently modulating means the controls _____ air to modulate amount of heat required

Answer 9

bleed

Question 10

Pneumatic controls that are inherently modulating are able to replace heat proportionate to ____ ____

Answer 10

heat loss

Question 11

Controller modulated output:

1. output called ____ line pressure
2. output modulates between 3 and ___psig

Answer 11

1. branch

2. 3 and 13psig

Question 12

How does a thermostat modulate it’s output?

Answer 12

A bleed device known as nozzle-flapper assembly

Question 13

1. As temperature varies, the ______ force varies and corresponding pressure is calibrated to vary between 3 and 13psig
2. Same pressure in branch line going to actuator, bimetal flapper assembly is configured to increase or decrease as temp falls

Answer 13

flapper