TM 5-4520-253-13I N S P E C T V E N T I L A T I NG A I R M O T O R ( C O N T)Do not operate heater in enclosure unless exhaust gases arepiped outside. Exhaust gases contain carbon monoxide, acolorless, odorless, deadly poisonous gas. Failure to provideproper elimination of the exhaust can cause severe illness ordeath.12. Operate heater and listen for slow motor operation and noise indicating possible failure in motorbearing.13. If repair is needed other than tightening screws and nuts, forward heater to intermediatemaintenance.14. Install15. Reach16. Installlouver panels (5 and 6) by locking eight studs (7) at each panel.through heater case opening (4) and connect louver linkages to louvers.bottom cover (3) using six screws (1) and lock washers (2).3-104
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