Economi$Er2 Sensor Usage; Economi$Er2 Controller Potentiometer And Led Locations - Carrier 48TM004-007 Installation, Start-Up And Service Instructions Manual

APPLICATION
Standard Unit*
Differential
Dry Bulb
Single
Enthalpy
Differential Enthalpy
with Stepper Actuator
Dry Bulb
Temperature with
PremierLink™†
(PremierLink
requires 4-20 mA
Actuator)
Differential Dry Bulb
Temperature with
PremierLink†
(PremierLink
requires 4-20 mA
Actuator)
Single Enthalpy with
PremierLink†
(PremierLink
requires 4-20 mA
Actuator)
Differential Enthalpy
with PremierLink†
(PremierLink
requires 4-20 mA
Actuator)
*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 Sensors (Optional).
2
33ZCSENCO2 — Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
33ZCASPCO2 — Aspirator box used for duct-mounted CO
33ZCT55CO2 — Space temperature and CO
33ZCT56CO2 — Space temperature and CO
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.
Fig. 32 — EconoMi$er2 Controller Potentiometer
and LED Locations
Table 3 — EconoMi$er2 Sensor Usage
OUTDOOR AIR
TEMPERATURE SENSOR
Included — 50HJ540569
Required —
CROASENR001A00
Included —
Not Used
Included —
Not Used
Required —
HH79NZ017
Required —
HH79NZ017
Included —
Not Used
Included —
Not Used
room sensor.
2
room sensor with override.
2
room sensor with override and setpoint.
2
RETURN AIR
TEMPERATURE SENSOR
—
Required —
CROASENR001A00
—
—
—
Required —
33ZCT55SPT
or Equivalent
—
—
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 x OA) + (T
O
T = Outdoor-Air Temperature
O
OA = Percent of Outdoor Air
T = Return-Air Temperature
R
RA = Percent of Return Air
T = Mixed-Air Temperature
M
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.
22
OUTDOOR AIR
ENTHALPY SENSOR ENTHALPY SENSOR
—
—
Required —
HH57AC078
Required —
HH57AC078
—
—
Required —
HH57AC077
Required —
HH57AC077
x RA) = T
R M
RETURN AIR
—
—
—
Required —
HH57AC078
—
—
—
Required —
HH57AC078