Carrier 50HJQ014 - Optional Economi$Eriv and Economi$Er2; Economi$Eriv Standard Sensors

18
OPTIONAL ECONOMI$ERIV AND ECONOMI$ER2 —
See Fig. 28 and 29 for EconoMi$erIV component locations.
See Fig. 30 for EconoMi$er2 component locations.
NOTE: These instructions are for installing the optional
EconoMi$erIV and EconoMi$er2 only. Refer to the accessory
EconoMi$erIV or EconoMi$er2 installation instructions when
field installing an EconoMi$erIV or EconoMi$er2 accessory.
To complete installation of the optional EconoMi$erIV, per-
form the following procedure.
1. Remove the EconoMi$erIV hood. Refer to Step 8 — In-
stall Outdoor-Air Hood on page 10 for information on
removing and installing the outdoor-air hood.
2. Relocate outdoor air temperature sensor from shipping
position to operation position on EconoMi$erIV. See
Fig. 28.
3. Reinstall economizer hood.
4. Install all EconoMi$erIV accessories. EconoMi$erIV
wiring is shown in Fig. 31. EconoMi$er2 wiring is shown
in Fig. 32.
Outdoor air leakage is shown in Table 5. Return air pressure
drop is shown in Table 6.
Table 5 — Outdoor Air Damper Leakage
Table 6 — Return Air Pressure Drop (in. wg)
ECONOMI$ERIV STANDARD SENSORS
Outdoor Air Temperature (OAT) Sensor
— The outdoor air
temperature sensor (HH57AC074) is a 10 to 20 mA device
used to measure the outdoor-air temperature. The outdoor-air
temperature is used to determine when the EconoMi$erIV can
be used for free cooling. The sensor must be field-relocated.
The operating range of temperature measurement is 40 to
100 F.
Supply Air Temperature (SAT) Sensor
— The supply air
temperature sensor is a 3 K thermistor located at the inlet of the
indoor fan. See Fig. 29. This sensor is factory installed. The op-
erating range of temperature measurement is 0° to 158 F. See
Table 7 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 7 — Supply Air Sensor Temperature/
Resistance Values
IMPORTANT: Failure to relocate the sensor will result in
the EconoMi$erIV not operating properly.
DAMPER STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0 1.2
LEAKAGE (Cfm) 35 53 65 75 90 102
AIRFLOW (Cfm)
4500 5000 5400 6000 7200 7500
0.040 0.050 0.060 0.070 0.090 0.100
TEMPERATURE (F) RESISTANCE (ohms)
–58 200,250
–40 100,680
–22 53,010
–4 29,091
14 16,590
32 9,795
50 5,970
68 3,747
77 3,000
86 2,416
104 1,597
122 1,080
140 746
158 525
176 376
185 321
194 274
212 203
230 153
248 116
257 102
266 89
284 70
302 55
ECONOMI$ERIV
OUTDOOR AIR
TEMPERATURE SENSOR
(INSTALLED OPERATION
POSITION)
SCREWS
SCREWS
FRAME
TOP
LOW TEMPERATURE
COMPRESSOR
LOCKOUT SWITCH
Fig. 28 — EconoMi$erIV Component Locations —
End View
FRAME
TOP
SCREWS
ECONOMI$ER2
SCREWS
Fig. 30 — EconoMi$er2 Component Locations
Fig. 29 — EconoMi$erIV Component Locations —
Side View
ACTUATOR
ECONOMI$ERIV
FLANGE
AND SCREWS
(HIDDEN)
CONTROLLER
SUPPLY AIR
TEMPERATURE SENSOR
LOCATION
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