Economi$Er Iv Standard Sensors - Bryant 581B036--072 Installation Instructions Manual

Fig. 25 --- Hood Box Removal
INDOOR
COIL
ACCESS
PANEL
Fig. 26 --- Indoor Coil Access Panel Relocation
LEFT
HOOD
SIDE
B
19 1/16"
HOOD DIVIDER
Fig. 27 --- Outdoor- -Air Hood Construction

Economi$er IV Standard Sensors

Outdoor Air Temperature (OAT) Sensor
The outdoor air temperature sensor (HH57AC074) is a 10 to 20
mA device used to measure the outdoor-air temperature. The
outdoor-air temperature is used to determine when the
EconoMi$er IV can be used for free cooling. The sensor is
factory-installed on the EconoMi$er IV in the outdoor airstream.
(See Fig. 23 and 33.) The operating range of temperature
measurement is 40_ to 100_F.
HOOD BOX
BRACKET
C06024
SIDE
PANEL
TOP
SIDE
PANEL
CAULK
HERE
INDOOR
COIL
ACCESS
PANEL
C06025
TOP
PANEL
INDOOR COIL
ACCESS PANEL
SCREW
33 3/8"
C06026
Supply Air Temperature (SAT) Sensor
The supply air temperature sensor is a 3k ohm thermistor located
at the inlet of the indoor fan. (See Fig. 34.) This sensor is factory
installed. The operating range of temperature measurement is 0°
to 158_F. See Table 5 for sensor temperature/resistance values.
Table 5—Supply Air Sensor Temperature/
Resistance Values
TEMPERATURE (F)
–58
–40
–22
–4
14
32
50
68
77
86
104
122
140
158
176
185
194
212
230
248
257
266
284
302
17 1/4"
DIVIDER
CLEANABLE
ALUMINUM
FILTER
BAROMETRIC
RELIEF
Fig. 28 --- Filter Installation
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.
Outdoor Air Lockout Sensor
The Economi$er IV is equipped with an ambient temperature
lockout switch located in the outdoor air stream which is used to
lockout the compressors below a 42_F ambient temperature. (See
Fig. 23.)
19
RESISTANCE (ohms)
200,250
100,680
53,010
29,091
16,590
9,795
5,970
3,747
3,000
2,416
1,597
1,080
746
525
376
321
274
203
153
116
102
89
70
55
OUTSIDE
AIR
HOOD
FILTER
FILTER
CLIP
C06027