Alpha Technologies AlphaGen 5.0kW Auxiliary Power Unit - Manual (Page 13)

1. System Overview
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031-132-B0-001 Rev. A TM ©2000
1.1 System Enclosure Overview
This manual is intended to provide a general functional overview for the
Auxiliary Power Unit (APU) used with the CEX2 Series Enclosures and also
covers Basic APU Operation and Maintenance. For more detailed information
pertaining to the installed APU, please consult the Generator Manufacturer’s
Operator’s Manual.
The APU is housed in a sound-attenuated, enclosed compartment which
contains inlet and exhaust vents. Cooling air enters the APU via the inlet vents
on the rear cabinet door. Additionally, the APU and main enclosures are
equipped with a fan which, when the engine is off, draws air into the APU
compartment as well as the main enclosure to direct any remaining gas fumes
out of the enclosure via the exhaust vent. During engine operation, an integral
engine-mounted fan provides cooling air in the same manner as previously
mentioned.
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Fig. 1-1 System enclosure