Test 5 Flashcards
Liquid Line Filter Dryers help to clean up what?
Do they remain in system?
system contaminants
Yes
Liquid Line Filter Driers removes what?
dirt and debris
•
When would you replace Liquid Line Filter Driers?
What are Liquid Line Filter Driers made of?
whenever system is dirty; or opened
• “When in doubt, change it out.”
Screens and fiberglass filters:
First letter(s) are manufacturer specific:
What does “C” stand for in filter drier line?
What does “EK” stand for in
Sporlan’s “Catch-All” line of filter driers
– “EK” for Alco’s (Emerson’s) “Extra Klean”
The First two numbers are for cubic inches capacity… 03 is for ________ and “30”
3 cubic inches and “30” for 30 cubic inches
Type of Dessicant: Activated Alumina causes
– High acid removal, and has moderate moisture capacity
Dessicant: Molecular Sieve
Does it have high water capacity?
Low or high acid removal?
Yes
low acid removal
Dessicant: Silica Gel
Do you use this in expensive or inexpensive filter driers?
Is the capacity high water or low water only?
• Used in “inexpensive” filter driers
– High water capacity only
What is the first step in Choosing the Correct Filter Drier?
Is sizing the same for A/C and refrigeration?
• First, determine tonnage
– No
What is the second and third step in Choosing the Correct Filter Drier?
Choose pipe size
• Then, connections
(Flare or sweat)
Suction Line Filter Driers is located where?
And what is the purpose of Suction Line Filter Driers?
– In the suction line
– Removes debris, moisture, and acid from system
Suction Line Filter Driers are designed for what?
When would you install one?
temporary use to clean up system
after a compressor burnout
What should you always check in Suction Line Filter Driers?
• “Rule of thumb”: for replacing Suction Line Filter Driers?
– Check pressure drop, or temperature drop
3°or more requires filter replacement or removal
With Suction Line Filter Driers – Excessive pressure drop?
– Low suction increases compression_______
is equivalent to 3°temperature drop
ratio and discharge heat
Should you leave Suction Line Filter Driers in system?
You should remove filters within _____
No!
3 days
Sight Glasses are located in_______
And the sight glass purpose of sight glass is to indicate ________
– In the liquid line
• liquid refrigerant flow
What are Sight Glasses made of?
The sight glass only shows what?
– Plain glass
refrigerant flow
Sight Glasses are with a…
So sight glasses show both refrigerant flow and…
moisture indicator
if moisture is present
Receivers are located in and right after what?
Receiver is a storage tank for?
– In the liquid line after the condenser
• for liquid refrigerant
What is the capacity of Receivers is the full charge of system…
plus 20%
The full charge of the Receiver which only take up ______ of the receiver?
Receivers are used on systems with….
• take up 80% of the receiver
• expansion valves
The King Valve on the Receiver is located?
– On receiver outlet
A service port
The King Valve on the Receiver is used to?
– pump down system
The King Valve on the Receiver has many postions…so when it is cracked you should…
When it is cracked the gauge port is… (and something else is open)
• check system pressure
• open, liquid line open
