Application Considerations - Trane GEH 006 Manual

How it Works?
Cooling Mode (Figure 34) If cooling is called for, the thermostat activates the
centrifugal blower and sets the reversing valve into the cooling position. If all
safeties are met, high temperature refrigerant vapor is pumped from the
compressor throught the reversing valve to the
refrigerant-to-water heat exchanger. The refrigerant
vapor condenses to a liquid as it passes through the heat
exchanger, giving up its heat to the circulating water
loop. High pressure liquid refrigerant then passes
through the expansion device into the
refrigerant-to-air fin
tube coil heat
exchanger. As the low
pressure refrigerant
passes through the coil,
it evaporates to become
a low temperature
vapor, absorbing heat
from the air, which is
drawn over the coil by the blower. The refrigerant
then flows as a low pressure gas through the reversing
valve back to the suction side of the compressor where
the cycle begins again.
Heating Mode (Figure 35) If heating is called for, the thermostat activates the
centrifugal blower and sets the reversing valve into the heating position. If
all safeties are met, high temperature refrigerant vapor is
pumped from the compressor through the reversing
valve to the refrigerant-to-air fin tube coil heat
exchanger. The high pressure refrigerant vapor
condenses to a liquid as it passes through the coil,
giving up its heat to the air which is drawn over the
coil by the blower. Liquid refrigerant then
passes through the
expansion devise into
the
refrigerant-to-water
heat exchanger. As the
low pressure
refrigerant passes
through the heat
exchanger, it evaporates
to become a low temperature vapor,
absorbing heat from the circulating water. The
refrigerant then flows as a low pressure gas through the
reversing valve back to the suction side of the
compressor where the cycle begins again.
26
Application
Considerations
Figure 34: Cooling mode
The energy generated from the com-
pressor motor operation will also be
rejected to the air-to-refrigerant heat
exchanger (heating) or water-to-refrig-
erant heat exchanger (cooling).
Figure 35: Heating mode
WSHP-PRC001-EN