Carrier 48TF004-007 - Economi$Er2 with 4 to 20 Ma Control Wiring; Barometric Flow Capacity; Outdoor Air Leakage; Return Air Pressure Drop

20
Exhaust Set Point Adjustment
— Except during purge, shut-
down, and air change, the exhaust set point will determine
when the exhaust fan runs based on damper position (if acces-
sory power exhaust is installed). When the ISI calls for
exhaust, the EconoMi$er2 controller provides a 45 ± 15 second
delay before exhaust fan activation. This delay allows the
damper to reach the appropriate position to avoid unnecessary
fan overload. The set point is modified with the Exhaust Fan
Set Point potentiometer. See Fig. 32.
Minimum and Maximum Position Control
— There is a
minimum damper position potentiometer and a maximum
damper position potentiometer on the EconoMi$er2 controller.
See Fig. 32. The minimum damper position maintains the min-
imum airflow into the building during the occupied period.
NOTE: The minimum position signal takes priority over the
maximum position signal. If the maximum damper position is
set below the minimum damper position, the EconoMi$er2
controller will maintain the actuator at minimum position.
4
3
5
2
8
6
7
1
10
11
9
12
PINK
VIOLET
BLACK
BLUE
YELLOW
NOTE 1
NOTE 3
RUN
500 OHM
RESISTOR
-
+
OPTIONAL CO
SENSOR 4 - 20 mA
OUTPUT
50HJ540573
ACTUATOR
ASSEMBLY
RED
WHITE
ECONOMISER2 PLUG
DIRECT DRIVE
ACTUATOR
2
NOTES:
1. Switch on actuator must be in run position for economizer to operate.
2. PremierLink™ control requires that the standard 50HJ540569 outside-air sensor be replaced by either the CROASENR001A00 dry bulb sen-
sor or HH57A077 enthalpy sensor.
3. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor.
Fig. 26 — EconoMi$er2 with 4 to 20 mA Control Wiring
0
500
1000
1500
2000
2500
0.05
0.15
0.25
STATIC PRESSURE (in. wg)
FLOW IN CUBIC FEET PER MINUTE (cfm)
0
5
10
15
20
25
30
0.13 0.20 0.22 0.25 0.30 0.35 0.40 0.45 0.50
STATIC PRESSURE (in. wg)
FLOW IN CUBIC FEET PER MINUTE (cfm)
Fig. 27 — Barometric Flow Capacity
Fig. 28 — Outdoor Air Leakage
0
1000
2000
3000
4000
5000
6000
0.05 0.10 0.15 0.20 0.25 0.30 0.35
STATIC PRESSURE (in. wg)
FLOW IN CUBIC FEET PER MINUTE (cfm)
Fig. 29 — Return Air Pressure Drop