Carrier 48TF004-007 - Economi$Er2 Sensor Usage; Economi$Er2 Controller Potentiometer and LED Locations

22
Table 3 — EconoMi$er2 Sensor Usage
*Optional adjustable Outdoor Air or Return Air Temperature sensor, CROASENR001A00, is available.
†PremierLink Control requires Supply Air Temperature sensor 33ZCSENSAT — Included with factory-installed PremierLink Control;
field-supplied and field-installed with field-installed PremierLink Control.
NOTES:
1. CO
2
Sensors (Optional).
33ZCSENCO2 — Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
33ZCASPCO2 — Aspirator box used for duct-mounted CO
2
room sensor.
33ZCT55CO2 — Space temperature and CO
2
room sensor with override.
33ZCT56CO2 — Space temperature and CO
2
room sensor with override and setpoint.
2. All units include the following Standard Sensors:
Outdoor-Air Sensor — 50HJ540569 — Opens at 67 F, closes at 52 F, not adjustable.
Mixed-Air Sensor — HH97AZ001 — (PremierLink control requires Supply Air Temperature sensor 33ZCSENSAT)
Compressor Lockout Sensor — 50HJ540570 — Opens at 35 F, closes at 50 F.
Adjust the minimum position potentiometer to allow the
minimum amount of outdoor air, as required by local codes, to
enter the building. Make minimum position adjustments with
at least 10 F (6 C) temperature difference between the outdoor
and return-air temperatures.
To determine the minimum position setting, perform the
following procedure:
1. Calculate the appropriate mixed air temperature using the
following formula:
(T
O
x OA) + (T
R
x RA) = T
M
T
O
= Outdoor-Air Temperature
OA = Percent of Outdoor Air
T
R
= Return-Air Temperature
RA = Percent of Return Air
T
M
= Mixed-Air Temperature
As an example, if local codes require 10% outdoor air
during occupied conditions, outdoor-air temperature is
60 F, and return-air temperature is 75 F.
(60 x .10) + (75 x .90) = 73.5 F
2. Disconnect the mixed air sensor from terminals T and T1.
3. Ensure that the factory-installed jumper is in place across
terminals P and P1. If remote damper positioning is being
used, make sure that the terminals are wired according to
Fig. 33 and minimum position potentiometer is turned
fully clockwise.
4. Connect 24 vac across terminals TR and TR1.
5. Carefully adjust the minimum position potentiometer un-
til the measured mixed air temperature matches the calcu-
lated value.
APPLICATION
OUTDOOR AIR
TEMPERATURE SENSOR
RETURN AIR
TEMPERATURE SENSOR
OUTDOOR AIR
ENTHALPY SENSOR
RETURN AIR
ENTHALPY SENSOR
Standard Unit*
Included — 50HJ540569 ———
Differential
Dry Bulb
Required —
CROASENR001A00
Required —
CROASENR001A00
——
Single
Enthalpy
Included —
Not Used
—
Required —
HH57AC078
—
Differential Enthalpy
with Stepper Actuator
Included —
Not Used
—
Required —
HH57AC078
Required —
HH57AC078
Dry Bulb
Temperature with
PremierLink™†
(PremierLink
requires 4-20 mA
Actuator)
Required —
HH79NZ017
———
Differential Dry Bulb
Temperature with
PremierLink†
(PremierLink
requires 4-20 mA
Actuator)
Required —
HH79NZ017
Required —
33ZCT55SPT
or Equivalent
——
Single Enthalpy with
PremierLink†
(PremierLink
requires 4-20 mA
Actuator)
Included —
Not Used
—
Required —
HH57AC077
—
Differential Enthalpy
with PremierLink†
(PremierLink
requires 4-20 mA
Actuator)
Included —
Not Used
—
Required —
HH57AC077
Required —
HH57AC078
Fig. 32 — EconoMi$er2 Controller Potentiometer
and LED Locations