1--2
©
2012 Mobile Climate Control
T-353 Rev. 01/2013
1.2 GENERAL DESCRIPTION
1.2.1 Rooftop Unit
The rooftop unit includes the condenser section and the evaporator section (See Figure 1-1).
Evaporator Section
Condenser Section
Figure 1-1 AC430 Rooftop Unit
1.2.2 Condensing Section
The condensing section includes the condenser
coils, two (2)fan and motor assemblies, receiver,
filter-drier and filter-drier service valves.
The condenser coils provide heat transfer surface for
condensing refrigerant gas at a high temperature and
pressure into a liquid at high temperature and
pressure. The condenser fans circulate ambient air
across the outside of the condenser tubes at a
temperature lower than refrigerant circulating inside
the tubes; this results in condensation of the
refrigerant into a liquid. The receiver collects and
stores liquid refrigerant. The receiver is also fitted
with a pressure relief valve which protects the system
from unsafe high pressure conditions. The
filter-drier removes moisture and debris from the
liquid refrigerant before it enters the thermostatic
expansion valve in the evaporator assembly. The
service valves enable isolation of the filter-drier for
service.
1.2.3 Evaporator Section
The evaporator section includes the evaporator coils,
two (2) single-shafted blower/motor assemblies, two
(optional) heater coil assemblies, a thermostatic
expansion valve and condensate drain connections.
The evaporator coils provide heat transfer surface
for transferring heat from air circulating over the
outside of the coil to refrigerant circulating inside the
tubes; thus providing cooling. The heating coils (if
equipped) provide a heat transfer surface for
transferring heat from engine coolant water
circulating inside the tubes to air circulating over the
outside surface of the tubes, thus providing heating.
The fans circulate the air over the coils. The air filters
remove dirt particles from the air before it passes
over the coils. The thermostatic expansion valve
meters the flow of refrigerant entering the
evaporator coils. The heat valve controls the flow of
engine coolant to the heating coils upon receipt of a
signal from the controller. The condensate drain
connections provide a means for connecting tubing
for disposing of condensate collected on the
evaporator coils during cooling operation.
Содержание 68AC430-100
Страница 1: ...OPERATION SERVICE for 68AC430 100 REV 01 2013 T 353 Manual T 353 2012 Mobile Climate Control...
Страница 30: ...5 2 2012 Mobile Climate Control T 353 Rev 01 2013 98 67037 00 Figure 5 2 Evaporator Motors...
Страница 31: ...5 3 2012 Mobile Climate Control T 353 Rev 01 2013 98 67037 00 Figure 5 3 Condenser Motors...
Страница 32: ...5 4 2012 Mobile Climate Control T 353 Rev 01 2013 98 67037 00 Figure 5 4 BT324 Controls With 1 Compressor...
Страница 33: ...5 5 2012 Mobile Climate Control T 353 Rev 01 2013 98 67037 00 Figure 5 5 BT324 Control Circuit...
Страница 34: ...5 6 2012 Mobile Climate Control T 353 Rev 01 2013 98 67037 00 Figure 5 6 AC430 With BT324 Control...
