HARNESS AS-BOX 2287979 - Caterpillar

Illustration 1 g00290852
(1) Heater/Air conditioner unit. (2) Fresh air filter. (3) Control panel. (4) Direct sunlight sensor. (5) Compressor. (6) Sensor in the cab. (8) Recirculation filter. (9) Fresh air (ambient air) sensor. (10) Condenser. (15) Receiver-dryer with sight glass and pressure switch.Heater/Air Conditioner Unit
Illustration 2 g00290857
(6) Sensor in the cab. (8) Recirculation filter. (11) Evaporator sensor. (12) Automatic temperature control unit. (14) Damper (Recirculation and Fresh air). (15) Damper (FACE and FOOT). (16) Evaporator. (17) Damper motor (Recirculation and Fresh air). (18) Damper motor (FACE and FOOT). (19) Air duct for recirculation. (20) Sensor at air outlet. (21) Resistor. (22) Motor for water valve. (23) Water valve. (24) Heater. (25) Water temperature sensor. (26) Blower motor. (27) Damper motor (FOOT and DEFROSTER). (28) Damper (FOOT and DEFROSTER). (A) Air outlet for FACE. (B) Air outlet (DEFROSTER). (C) Air outlet for FOOT. (D) Air inlet for Recirculated air. (E) Fresh air inlet.
Illustration 3 g00291184
(A) Air outlet for FACE. (B) Air outlet (DEFROSTER). (C) Air outlet for FOOT. (D) Air inlet for Recirculated air. (E) Fresh air inlet. (16) Evaporator. (24) Heater core. (26) Blower motor.Refrigerant Compressor
Illustration 4 g00290883
(29) Service valve (high pressure). (30) Hose (high pressure). (31) Hose (low pressure). (32) Service valve (low pressure). (33) Relief valve. Receiver-dryer
Illustration 5 g00290884
(34) Sight glass. (35) Pressure switch.Heating and Air Conditioning Control Panels
Illustration 6 g00291103
Control Panel for Heating and Air Conditioning (41) Air outlet selection switch. (42) Preset temperature display. (43) Air conditioning On/Off switch. (44) Automatic temperature control switch. (45) On/Off switch. (46) Air inlet selection switch (Recirculation and Fresh Air). (47) Temperature selection switch. (48) Fan speed switch.
Illustration 7 g00326766
Control Panel for Heat Only (41) Air outlet selection switch. (45) On/Off switch. (46) Air inlet selection switch (Recirculation and Fresh Air). (47) Temperature selection switch. (48) Fan speed switch.Note: All machines are equipped with a heater. Only certain machines are equipped with an air conditioner. Those machines that are not equipped with an air conditioner also are not equipped with switches for the following functions:
Preset temperature display
Air conditioning On/Off
Automatic temperature controlControl Block Diagram
Illustration 8 g00291732
System Configuration
Illustration 9 g00291730
(1) Control panel. (2) Water temperature sensor. (3) Controller. (4) Potentiometer for water valve (heater). (5) Relay for air conditioning system. (6) Evaporator coil. (7) Engine. (8) Compressor. (9) Direct sun light sensor. (10) Potentiometer for air inlet switch (FACE to FOOT). (11) Sensor at air outlet. (12) Blower. (13) Relay for blower motor. (14) Fresh air sensor. (15) Heater. (16) Evaporator sensor. (17) Resistor. (18) Sensor in the cab. (19) Receiver-dryer. (20) Condenser. (21) Radiator. (A) Air outlet for FACE. (B) Air outlet (DEFROSTER). (C) Air outlet for FOOT. (D) Air inlet for recirculated air. (E) Fresh air inlet.Schematic Diagram of Refrigerant Lines and Coolant Lines (Air Conditioning System with Expansion Valve)
Illustration 10 g00291102
(F) Inside cab. (G) Engine. (1) Heater/Air conditioner unit. (5) Compressor. (6) Evaporator coil. (7) Expansion valve. (10) Condenser. (15) Receiver-dryer. (21) Radiator. (23) Water valve. (24) Heater core. (30) Hose (high pressure). (31) Hose (low pressure). (32) Coolant supply line. (33) Coolant