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TM 9-4120-389-14
NOTE
It is normally better to keep the fresh air damper slightly open. This will create a
slight overpressure, provide replacement oxygen, and reduce room odors.
Damper should be closed during extreme weather conditions and during periods
when fast warmup or cooling is necessary.
o Do not adjust controls unnecessarily. Properly set the controls (See para. 2-8 thru 2-11) and the
unit will automatically control the temperature. The temperature control thermostat on the control panel
operates like a conventional room thermostat except that the temperature scale is not marked on the control
panel. The thermostat has a control range of 60 deg. F to 90 deg. F (16 deg. C to 32 deg. C). The centered
position of the control knob would be approximately 75 deg. F (24 deg. C). The full WARMER would be 90 deg.
F (32 deg. C). The full COOLER would be 60 deg. F (16 deg. C).
(2) During cold weather
Adjust shades, blinds, etc. (when applicable) to admit sunlight during day. Close them at night.
Contact Unit Maintenance for downward adjustment of conditioned air outlet dampers.
Adjust the conditioned air outlet dampers slightly downward.
(3) During hot weather
Adjust shades, blinds, etc. (when applicable) to block out sunlight during day.
Contact Unit Maintenance for upward adjustment of conditioned air outlet dampers.
2-18
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