General Unit Description
The Blue Bird air conditioning unit is designed to provide comfort, at
temperatures between 70 - 80 ºF.
The typical A3RE/FE and BBCV system consists of three separate assemblies;
the condenser, evaporator and compressor. The Micro Bird has two completely
separate condenser, evaporator and compressor sets; the rear Comfort Aire and
chassis OEM system.
Comfort Aire offers condensers uniquely designed pair to mount on the roof, or
inside the skirt of the bus on the driver’s side. The large bus skirt side condenser
comes equipped with two separate condenser coils and three fans. Each of the
two roof top condenser units have a single coil and two fans.
The Evaporators are mounted inside of the bus, in this instance there are two
evaporators, one mounted on the curbside of the bus (Rear 1 Evaporator), the
other mounted on the road side of the bus (Rear 2 Evaporator). There is a third
non MCCII evaporator, incorporated into the front heater/defroster. This
evaporator is connected to the blue system hoses via a set of T-connections.
The compressors are mounted on top of the engine for the BBCV and
underneath of the CAT engines and on top of Cummins engines for the
A3RE/FE. The compressors are driven by the bus engine. Refrigeration lines are
used to connect the condenser, evaporator and compressor.
The two systems work separately.
Compressor operation is controlled by the drivers control switches and
thermostat, which energize the compressor clutch during engine operation. The
refrigeration system is protected by H. P. Binary Switch
Below is a typical arrangement for a BBCV or A3FE with roof top condensers.
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