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Oshkosh Corporation Classification - Restricted <br />PIERCE MANUFACTURING INC.- <br />AN OSHKOSH CORPORATION®COMPANY <br />Certification Document CDO167 <br />Saber° FR - Enforcer TM <br />Air Conditioning & Defrost <br />Pierce Manufacturing certifies the performance of the SaberOFR - EnforcerTM cab air <br />conditioning and defrost system. <br />The air conditioning and defrost system was tested successfully in an environmental chamber. <br />Air Conditioning: <br />Air conditioning performance testing was conducted at an ambient of 100OF and 50 percent <br />relative humidity. The engine speed was maintained at 1000 RPM with the QP21 compressor <br />The vehicle was heat soaked in the environmental chamber. All temperature probes were <br />monitored to confirm temperature stabilization. The transient test began when all the vehicle <br />doors were closed, and the air conditioning turned on. <br />The average cab temperature dropped to a maximum of 72.1 OF within 30 minutes. <br />Pierce Saber Cab <br />100°F 50% RH Pull-DOwn, <br />1000 RPM Engine Speed <br />Ambient AVG ff I Interior AVG ('F) <br />=Supply Air AVG ('l -Compressor Suction Pressure (PSIIG) <br />-Compressor Discharge Pressure (PSIIG) <br />110 <br />300 <br />105 <br />95 <br />90 <br />- 200 <br />0 <br />i- <br />85 <br />- - <br />� <br />M <br />80 <br />o <br />- ^, - - - - - - <br />- 150 <br />75 <br />70 <br />I o o <br />� <br />17J <br />~ <br />fi. <br />65 <br />60 <br />- - - - - - - - - <br />., <br />- 50 <br />55 <br />luimnum owmwwuwwuwuuiluuw�awx <br />- - - �Nwi9WNuommmoo <br />m� ink <br />50 <br />— — — — — — — — — - <br />- 0 <br />-5 0 5 10 15 20 25 <br />30 <br />Time (mini) <br />CDO167 Saber ER - Enforcer Air Conditioning Defrost 290420.doc 1 4/28/2020 <br />