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 TM 55-1905-223-24-17
(2)
Remove machine screws (2) to separate the front case (15) from heater case (14). Slide the
front case out and away from the unit just far enough to access the thermostat (4) wiring.
(3)
Tag and disconnect the electrical wiring to the thermostat (5).
(4)
Remove the thermostat (5) from the back side of the case (14).
(5)
Install new thermostat (5).
(6)
Connect electrical wiring to proper terminals on thermostat (5).
(7)
Install case front (15) to heater case (14) with screws (2).
(8)
Install thermostat knob on front side of case (15).
c.
Replace thermostatic switch and/or magnetic contactor.
(1)
Remove screws (8) to separate case back (9) from heater case (14). Gently slide case back
(9) out to access thermostatic switch (6) and contactor (7).
(2)
Tag and disconnect wiring to thermostatic switch and/or magnetic contactor.
(3)
Remove defective switch or contactor.
(4)
Install new thermostatic switch (6) and/or magnetic contactor (7) as appropriate.
(5)
Connect electrical wiring to proper terminals.
(6)
Install case back (9) to heater case (14) with screws (8).
d.
Replace alternating current motor:
(1)
Tag and disconnect electrical wiring from motor (11).
(2)
Remove screws (10) from guard (12) and slide the guard (12), fan (13), and motor (11) from
the back case (8).
(3)
Remove fan (13) from shaft of motor (11).
(4)
Remove guard (12) from motor (11).
(5)
Install new motor (11) to guard (12).
(6)
Install fan (13) on motor (11) shaft.
(7)
Install the fan (13), guard (12), and motor (11) assembly to the case back (9) with screws
(10).
(8)
Connect electrical wiring to proper terminals on motor (11).
3-29
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