Filter
Top Products
39
Filter
Clips
Aluminum
Filter
A09704
Fig. 35 -- Filter Installation (See through view)
Bottom
filter rack
Screw
(Note 4 and 5)
RIGHT SIDE
Evaporator
Coil
Top filter
rack
BENT COIL
Bottom
filter rack
Top filte r
rack
Evaporator
Coil
STRAIGHT COIL
A09714
Fig. 36 -- Indoor Coil with Filter Rack
CONFIGURATION
Economizer Standard Sensors
OUTDOOR AIR TEMPERATURE (OAT) SENSOR— The
outdoor air temperature sensor (HH57AC080) is a 10 to 20mA
deviceusedtomeasuretheoutdoor--airtemperature.Theoutdoor--air
temperature is used to determine when the Economizer can be used
forfreecooling. Theoperating rangeof temperaturemeasurementis
40to100_F (4.4to37.8_C).Thesensorhas8 selectabletemperature
changeover setpoints.The temperaturechangeoverisset using 3dip
switches on the sensor. The ABCD potentiometer on the controller
should be set to the “D”position. See Fig. 39.
SUPPLY AIR TEMPERATURE (SAT) SENSOR—The supply
air temperaturesensorisa 3 KΩthermistor located at the inlet of the
indoor fan. See Fig. 37. The operating range of temperature
measurement is 0_ to 158_F (-- 17.8_ to 70_C). See Table 15 for
sensor temperature/resistance values. The temperature sensor looks
like an eyelet terminalwith wires running to it. Thesensor islocated
in the “crimp end” and is sealed from moisture.
Table 15 – Supply Air Sensor Temperature/Resistance Values
TEMPERATURE
(_F)
CELSIUS (_C) RESISTANCE (OHMS)
--- 22 ---30 53,010
--- 4 --- 20 29,091
14 --- 10 16,590
32 0 9,795
50 10 5,970
68 20 3,747
77 25 3,000
86 30 2,416
104 40 1,597
122 50 1,080
140 60 746
158 70 525
Indoor
Blower
Supply Air Temperature
Sensor (SAT)
A09707
Fig. 37 -- SAT Location
604D-- --A