1--2
©
2015 Mobile Climate Control
T-367Rev. 05/2015
1.2 GENERAL DESCRIPTION
1.2.1 Rooftop Unit
The rooftop unit includes the condenser section and the evaporator sections (See Figure 1-1).
Model/Serial Number Plate
Interior Location
EVAPORATOR SECTION
Evaporator Section
Condenser Section
Figure 1-1 Rooftop Unit (Eco Xcel)
1.2.2 Condensing Section
The condensing section includes 2 micro-channel
condenser coils, four (4) fan and motor assemblies
and receiver tank assembly with sight glasses,
moisture indicator and fusible plug
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 tank is also
equipped with a pressure relief valve (fusible plug)
which protects the system from unsafe high pressure
conditions. The filter-drier, located in the evaporator
section, removes moisture and debris from the liquid
refrigerant before it enters the thermostatic
expansion valve in the evaporator assembly.
a. Condenser fan operation
Low Speed ON: 150 psig (10.31 bar)
Low Speed OFF: 120 psig (8.27 bar)
High Speed ON: 225 psig (15.51 bar)
High Speed OFF: 165 psig (11.38 bar)