Optional Economi$Eriv And Economi$Er2; Economi$Eriv Standard Sensors - Carrier 50HJQ014 Installation, Start-Up And Service Instructions Manual

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$erIV. See
Fig. 28.
IMPORTANT: Failure to relocate the sensor will result in
the EconoMi$erIV not operating properly.
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
DAMPER STATIC PRESSURE (in. wg)
0.2 0.4
LEAKAGE (Cfm) 35
Table 6 — Return Air Pressure Drop (in. wg)
AIRFLOW (Cfm)
4500 5000 5400
0.040 0.050 0.060

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$erIV can
be used for free cooling. The sensor must be field-relocated.
The operating range of temperature measurement is 40 to
100 F.
Supply Air Temperature (SAT) Sensor — The supply air
temperature sensor is a 3 K thermistor located at the inlet of the
indoor fan. See Fig. 29. This sensor is factory installed. The op-
erating range of temperature measurement is 0° to 158 F. See
Table 7 for sensor temperature/resistance values.
The temperature sensor looks like an eyelet terminal with
wires running to it. The sensor is located in the "crimp end"
and is sealed from moisture.
FRAME
ECONOMI$ERIV
SCREWS
TOP
Fig. 28 — EconoMi$erIV Component Locations —
End View
0.6 0.8 1.0 1.2
53 65 75 90 102
6000 7200 7500
0.070 0.090 0.100
OUTDOOR AIR
TEMPERATURE SENSOR
(INSTALLED OPERATION
SCREWS
POSITION)
LOW TEMPERATURE
COMPRESSOR
LOCKOUT SWITCH
Table 7 — Supply Air Sensor Temperature/
Resistance Values
TEMPERATURE (F)
–58
–40
–22
–4
14
32
50
68
77
86
104
122
140
158
176
185
194
212
230
248
257
266
284
302
ECONOMI$ERIV
ACTUATOR
CONTROLLER
FLANGE
AND SCREWS
(HIDDEN)
Fig. 29 — EconoMi$erIV Component Locations —
FRAME ECONOMI$ER2
TOP
SCREWS
Fig. 30 — EconoMi$er2 Component Locations
18
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
SUPPLY AIR
TEMPERATURE SENSOR
LOCATION
Side View
SCREWS