TM 5-6115-434-12
z.
Cooled Air System Indicating Lamp (no. 1 system (fig. 2-18).
(1)
Description. A filament type press-to-test lamp with a red lens.
(2)
Purpose. Illuminates to indicate that the no. 1 cooled air temperature control is calling for cooling.
aa.
Cooled Air System Indicating Lamp (no. 2 system) (fig. 2-18).
(1)
Description. A filament type press-to-test lamp with a red lens.
(2)
Purpose. Illuminates to indicate that the no. 2 cooled air temperature control is calling for cooling.
ab.
Cooled Air System Temperature Control (no. 1 system) (fig. 2-18).
(1)
Description. An electronic thermostat control, connected to the thermistor-temperature-sensitive elements
in the return air ducts.
(2)
Purpose. Provides progressive adjustment of the cooled air output temperature from the No. 1 cooled air
system. Lowers the output temperature when rotated counterclockwise and raises the output temperature when rotated
clockwise.
ac.
Cooled Air System Temperature Control (no. 2 system) (fig. 2-18).
(1)
Description. An electronic thermostat control, connected to thermister-temperature-sensitive elements in
the return air duct.
(2)
Purpose. Provides progressive adjustment of the cooled air output temperature from the no. 2 cooled air
system. Lowers the output temperature when rotated counterclockwise and raises the output temperature when rotated
clockwise.
ad.
Heating Range Selector Switch (no. 1 system) (fig. 2-18).
(1)
Description. A four position rotary switch.
(2)
Purpose. Selects one of the three heating ranges (LOW, MED, HIGH) as desired for the no. 1 heated air
system. Limits the travel of the heat control valve in the opening direction (25 percent, 50 percent and full open).
Provides an OFF position for shutdown of the heated air system.
ae.
Heating Range Selector Switch (no. 2 system) (fig. 2-18).
(1)
Description. A four position rotary switch.
(2)
Purpose. Selects one of the three heating ranges (LOW, MED, HIGH) as desired for :the no. 2 heated air
system. Limits the travel of the heat control valve in the opening direction (25 percent, 50 percent and full open).
Provides an OFF position for shutdown of the heated air system.
af.
Heated Air System Temperature Control (no. 1 system) (fig. 2-18).
(1)
Description. An electronic thermostat control, connected to thermistor-temperature-sensitive elements in
the return air ducts.
(2)
Purpose. Provides progressive adjustment of the heated air output temperature, within the heating range
selected by the heating range selector switch, from the no. 1 heated air system. Lowers the output temperature when
rotated counterclockwise and raises the output temperature when rotated clockwise.
ag.
Heated Air System Temperature Control (no. 2 system) (fig. 2-18).
(1)
Description. An electronic thermostat control, connected to thermistor-temperature-sensitive elements in
the return air ducts.
(2)
Purpose. Provides progressive adjustment of the heated air output temperature, within the heating range
selected by the heating range selector switch, from the no. 2 heated air system. Lowers the output temperature when
rotated counterclockwise and raises the output temperature when rotated clockwise.
ah.
Panel Illumination Lamp (fig. 2-18).
(1)
Description. A hooded filament type lamp, adjustable for directing the illumination on the panel.
(2)
Purpose. Illuminates the conditioned air system temperature control panel for night operations. The lamp
is energized by the panel light switch (fig. 2-16).
2-10. 60 Hz Electrical System Controls and Instruments (fig. 2-19)
a.
General. The 60 Hz electrical system controls and instruments are located on the instrument panel (fig. 2-19).
The description, purpose, and function of the 60 Hz electrical system controls and instruments for the power unit 60 Hz
electrical system are described as follows.
2-30
