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Chapter 1: DESCRIPTION AND THEORY OF OPERATION
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TM-9-4120-428-14 Air Conditioner Horizontal Compact 9000 BTU/HR 208 Volt Three Phase 400 Hertz Model No. F9000H-4SPFI Manual
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Table 1. Location and Description of Major Components.
TM 9-4120-428-14
OPERATOR'S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE
AIR CONDITIONER, HORIZONTAL, COMPACT
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
The Keco Industries, Inc. model F9000H-4SPFI Air Conditioner is designed to circulate, filter, and cool or heat air in the
room or enclosure in which it is installed. The air conditioner will control and maintain enclosure temperature for efficient
operation of electronic equipment and personnel comfort over a wide range of weather conditions.
Table 1. Location and Description of Major Components.
COMPONENT
DESCRIPTION
Fabric Cover
Protects back or exposed side of the unit during periods of shut down. Must
be rolled up when operating in the cool mode or when fresh (outside) air is
being used in any mode.
Conditioned Air Supply Louver
Provides directional control of conditioned air.
Conditioned (Evaporator) Air Fan
Draws the room or enclosure air in over the filter and blow it out over the
evaporator and heaters to supply conditioned air. The speed is adjustable. See
Item 16.
Temperature Selector (Thermostat) Sensing
Senses the temperature of the room or enclosure air as it is drawn back into
Bulb
the air conditioner. This bulb is part of the TEMPERATURE SELECTOR
control (thermostat) that is located on the control panel module.
Conditioned Air Filter
Filters room or enclosure air as it is re-circulated.
Conditioned Air Fan Motor
Drives the conditioned air fan.
Return Air Louver with Filter Clamps
The re-circulated air from the room or enclosure is drawn in through this
louver. The conditioned air filter, item 5, is mounted on clips on the inside of
this louver.
Junction Box and Control Panel Module
Contains major unit controls. See items 9 thru 16 for a description of some of
these controls.
Control Circuit Breaker
Protects control circuit.
Input Power Receptacle (Primary Location)
Connection point for main input power cable. See item 37 for Input Power
Receptacle (Alternate Location).
Control Panel Module
Contains switches and controls for operating the air conditioner. See items 13,
14, 16, and 17 for a description of these switches and controls.
High Refrigerant Pressure Cutout Switch
This switch is factory set to shut the compressor off if the refrigerant
discharge line pressure rises to 470 to 490 psig (33.04 to 34.45 kg/cm2).
Note: This switch must be reset by hand after the pressure drops to 320 psig
(22.50 kg/cm2)
Compressor Circuit Breaker
Protects the compressor.
Mode Selector Switch
Allows selection of unit operating mode.
Low Refrigerant Pressure Cutout Switch
This switch is factory set to shut the compressor off if the refrigerant suction
line pressure drops to 10 to 20 psig (0.703 to 1.406 kg/cm2. This switch must
be hand reset after the pressure rises above 40 psig (2.812 kg/cm2).
Evaporator Fan Speed
Allows selection of HIGH or LOW unit conditioned air (evaporator) fan
speed.
0002 00-1

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