47
Filter
Clips
Aluminum
Filter
A09704
Fig. 36 -- 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 filter
rack
Evaporator
Coil
STRAIGHT COIL
A09714
Fig. 37 -- 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 device
used to measure the outdoor--air temperature. The outdoor--air
temperature is used to determine when the Economizer can be used
for free cooling. The operating range of temperature measurement is
40 to 100
_
F (4.4 to 37.8
_
C). The sensor has 8 selectable temperature
changeover setpoints. The temperature changeover is set using 3 dip
switches on the sensor. The ABCD potentiometer on the controller
should be set to the “D” position. See Fig. 40.
SUPPLY AIR TEMPERATURE (SAT) SENSOR—
The supply
air temperature sensor is a 3 K
Ω
thermistor located at the inlet of the
indoor fan. See Fig. 38. The operating range of temperature
measurement is 0
_
to 158
_
F (--17.8
_
to 70
_
C). See Table 20 for
sensor temperature/resistance values. The temperature sensor looks
like an eyelet terminal with wires running to it. The sensor is located
in the “crimp end” and is sealed from moisture.
Table 20 – 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. 38 -- SAT Location
LOW
TEMPERATURE
COMPRESSOR
LOCKOUT
SWITCH—
The Economizer is equipped with a low ambient
temperature lockout switch located in the outdoor airstream which is
used to lock out the compressors below a 42
_
F (5.6
_
C) ambient
temperature.
574D
--
--
A
Summary of Contents for 574D----A
Page 3: ...3 A09469 Fig 2 574D A24 36 Unit Dimensions 574D A ...
Page 4: ...4 A09470 Fig 3 574D A42 60 Unit Dimensions 574D A ...
Page 16: ...16 A09282 Fig 14 208 230 1 60 Connection Wiring Diagram 574D A ...
Page 17: ...17 A09282 Fig 14 Cont 208 230 1 60 Ladder Wiring Diagram 574D A ...
Page 18: ...18 A09264 Fig 15 208 230 3 60 Connection Wiring Diagram 574D A ...
Page 19: ...19 A09264 Fig 15 Cont 208 230 3 60 Ladder Wiring Diagram 574D A ...
Page 20: ...20 A09265 Fig 16 460 3 60 Connection Wiring Diagram 574D A ...
Page 21: ...21 A09265 Fig 16 Cont 460 3 60 Ladder Wiring Diagram 574D A ...
Page 25: ...25 Table 7 Cooling Charging Chart A08490 574D A ...
Page 50: ...50 A10098 Fig 45 Economizer Wiring Diagram 574D A ...
Page 51: ...51 A10075 Fig 46 Connection Wiring Diagram 230 3 574D A ...
Page 52: ...52 A10075 Fig 46 Cont Ladder Wiring Diagram 230 3 574D A ...
Page 53: ...53 A10087 Fig 47 Connection Wiring Diagram 460 3 574D A ...
Page 54: ...54 A10087 Fig 48 Ladder Wiring Diagram 460 3 574D A ...
Page 58: ...58 A10064 Fig 49 574D A 30 36 3 Phase with Economizer 574D A ...
Page 59: ...59 A10065 Fig 50 574D A 42 60 3 Phase with Economizer 574D A ...