Ductless Air-Conditioning Systems

Question 1

The refrigerant evaporating temperature range of most comfort cooling systems is ____.

Answer 1

40 F - 50 F

Question 2

As moisture in a window air conditioner system evaporates, it helps to cool the ____.

Answer 2

compressor and condenser

Question 3

In a room air conditioner, the thermostat’s sensing bulb is usually installed at the inlet of the ____.

Answer 3

evaporator

Question 4

PSC (permanent split capacitor) compressor motors have difficulty starting if the supplied voltage is low. To overcome this problem, a technician will often install a ____.

Answer 4

relay and start capacitor

Question 5

The most common installation location of a PTAC is ____.

Answer 5

in an exterior wall of a building

Question 6

The method by which a PTHP changes between modes of operation (heating and cooling) is that ____.

Answer 6

a reversing valve changes the direction of refrigerant flow

Question 7

All types of PTACs use ____ compressors.

Answer 7

hermetic

Question 8

PTACs are normally charged with ____

Answer 8

R-134a or R-140A

Question 9

Console units typically us a(n) ____ metering device.

Answer 9

TXV