TM 9-4120-388-14
4-61. ELECTRIC HEATER (ELEMENTS) (HR1 THROUGH HR6).
b. Heater Removal
This task consists of:
a. Inspection/Testing
c. Heater Support and Bracket Removal
d. Heater Support Installation
e. Heater Installation
INITIAL SET-UP:
Equipment Condition
Top panel removed (4-27).
Disconnect input power to the air conditioner before performing any internal
maintenance. Voltages used can KILL. Shutting the unit off at the control panel
does not disconnect unit power.
a. Inspection/Testing.
(1) Check heater elements for deformation, damaged terminals or threads, or cracked or broken outside covering.
Replace if damaged
(2) Using a multimeter set on lowest OHMS scale, check for continuity between the two terminal studs. Re-
b. Heater removal.
(1) Be sure power has been disconnected.
(2) Tag and disconnect the wire leads from the heater that is being removed.
(3) Loosen the captive panel fastener screw in the retainer clamp.
(4) Pull heater element free of lower mounting clip and remove heater.
Heater support and bracket removal.
c.
(1) Remove all six heaters.
(2) Remove two screws, Iockwashers, and flat washers.
(3) Remove heater support.