Cards in this guide (23)
What is the purpose of a crankcase heater on a compressor
to prevent liquid refrigerant from staying in the compressor
after shut down
What kind of head pressure would you experience if the condenser fan motor became inoperative
The compressor would continue to operate until the high pressure
safety switch shut it down, if the switch failed the pressure
relief device would blow and you would lose all of the refrigerant.
As far as how high would the pressure get, the settings on the two
devices depend on what type of refrigerant is used and you do not
mention that.
What are the three letters on a compressor terminal block
What type of air conditioning coolant is used for a 1995 mercury sable
Hole in your transition betweenfurnace an the evaporator will this cause the evaporator to freeze up
No,most likely your evaporator / filter is dirty or your system
is low on freon.
Why is there a delay in restarting a compressor that has kicked off due to an internal overload
Sequencer is out of sequence
Is freon used for air conditioning
freon is just a brand name
What is the purpose of a squirrel cage
What color is the high side gauge
How much should a HVAC capacitor cost
$132-$252, depending on size.
Speed control of motor using SCR
An SCR chip is commonly used to control the speed of a motor.
The speed is controlled using an AC circuit and phase angles.
Purpose of Vibratory filter dryer for drying of crystal
advantages and disadvantages of plate heat exchangers
When charging vapor should be added to low side or high side
low side never charge from high side
What will happen to dc signal if positive probe connected to negative terminal and negative probe connected to positive of the dc supply
If you are referring to using a volt meter then you will just
get a negative reading on most modern digital meters. If you are
using an old analogue meter you may get no reading.
Why do you use a vacuum pump on an air conditioning unit
They are used when installing, to ensure there is no air or
moisture in the pipework. On large industrial and commercial
systems a sight glass may also be installed so the presence of
moisture can be constantly checked for.
What is the evaporator coil
An evaporator coil is a vital part of any heating or cooling
system. It is usually found in an air conditioner, because
evaporator coils are particularly good at absorbing heat when air
is passed through their system. Evaporator coils look like a series
of pipes.
When charging vapor should be added to the side of the compressor
How many watts does a 5000 BTU AC unit typically use up
A 5000 btu AC unit operating at 25% efficiency operating
continuously for 1 hour, will use approximately 5858 watts or 5.858
KW/h.
What color is the low side gauge
Need a cacuum emissions diagram hose routing for a 1978 Chevy nova 350 4 barrel
There should be a sticker located in the engine compartment that
shows the emission related vacuum line routing.
What two copper lines connect the evaporator section with the condensing unit
What side of the compressor should liquid be add when charging
What is a sequencer and where is used
A sequencer is a programmable electronic device for storing
sequences of musical notes, chords, or rhythms and transmitting
them to an electronic musical instrument. It would be used in a
recording studio, on stage etc