Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
Copyright © 2017
ATA 21-00-23
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Revision 10
June 1, 2017
SUBTASK 21-00-23-30-002
8.3
Evaporator Module Assembly Repair Procedures:
8.3.1
The following components may require periodic repair and/or replacement (refer to the
Inspection Schedule in Section 8 for mandatory time intervals) (refer to Figure
10002/10003):
•
Evaporator Coil
•
Evaporator Housing Assembly
•
Blower Assembly
•
Condensate Drain (part of Evaporator Housing Assembly)
•
Expansion Valve
8.3.1.1
Evaporator Coil
The evaporator coil fins can, over time, become clogged with dirt, dust, and other
foreign matter. The component can also become damaged. The coil return bends
can, over time, become damaged. Dents, nicks, cracks, and other damage can cause
less than optimal performance. It is essential that the evaporator coil remain clear and
undamaged for proper operation. Refer to Cleaning (Section 6) for proper cleaning
procedures. If coil fins are bent, use a fin comb and try straightening the fins. If fins
are excessively damaged or the return bends are excessively damaged, the entire
evaporator coil assembly must be removed (refer to Disassembly, Section 5) and sent
to Enviro Systems for repair. Contact Enviro Systems customer service.
8.3.1.2
Evaporator Housing Assembly
The components that comprise the evaporator housing assembly are the shroud and
escutcheon. Over time, the shroud and escutcheon may show signs of separating
and this can cause the evaporator coil assembly to have less than optimal
performance. After insuring that the seam between the shroud and escutcheon has
been cleaned according to the cleaning procedures (Section 6), apply a new bead of
RTV and smooth. Allow RTV to cure for a minimum of 24 hours before operating
system. If housing assembly is damaged in any way other than seam separation, the
entire assembly must be removed and sent to Enviro Systems for repair. Contact
Enviro Systems customer service.
CAUTION
: USE EXTREME CARE TO PREVENT DAMAGE OR BENDING TO THE BLOWER WHEEL
FRAME AND/OR BLADES.
8.3.1.3
Blower Assembly
The components that comprise the blower assembly are the blower motor, blower
scroll and blower wheel. Over time, these components can become dirty or damaged
causing the assembly to have less than optimal performance. Occasionally damage
will occur to unit that requires repair and/or replacement of one or more of the
assembly components.
