Supply Air Temperature (Sat) Sensor; Outdoor Air Temperature (Oat) Sensor; Economi$Er2; Field Connections - Carrier 48HC Installation Instructions Manual

Supply Air Temperature (SAT) Sensor —
On FIOP- - equipped 48HC unit, the unit is supplied with a
supply- - air temperature (SAT) sensor (33ZCSENSAT).
This sensor is a tubular probe type, approx 6- - inches (152
mm) in length. It is a nominal 10- - k ohm thermistor.
The SAT is factory- - wired. The SAT probe is wire- - tied to
the supply- - air opening (on the horizontal opening end) in
its shipping position. Remove the sensor for installation.
Re- - position the sensor in the flange of the supply- - air
opening or in the supply air duct (as required by local
1
codes). Drill or punch a /
2
Use two field- - supplied, self- - drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 50.
SUPPLY AIR
TEMPERATURE
SENSOR
SUPPLY AIR
Fig. 50 - - Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE: Refer to Form 33CS- - 67SI for complete
PremierLink configuration, operating sequences and
troubleshooting information. Have a copy of this manual
available at unit start- - up.
APPLICATION
Differential Dry Bulb
Temperature with
PremierLink
(PremierLink requires
4---20 mA Actuator)
Single Enthalpy with
PremierLink
(PremierLink requires
4---20mA Actuator)
Differential Enthalpy
with PremierLink
(PremierLink requires
4---20mA Actuator)
NOTES:
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
- - in. hole in the flange or duct.
ROOF
CURB
RETURN AIR
C08200
Table 3 – PremierLink Sensor Usage
OUTDOOR AIR
TEMPERATURE TEMPERATURE
SENSOR
Included ---
CRTEMPSN001A00
Included ---
Not Used
Included ---
Not Used
2
room sensor with override.
2
room sensor with override and setpoint.
2
NOTE: The sensor must be mounted in the discharge
airstream downstream of the cooling coil and any heating
devices. Be sure the probe tip does not come in contact
with any of the unit's heater surfaces.
Outdoor Air Temperature (OAT) Sensor —
The OAT is factory- - mounted in the EconoMi$er2 (FIOP
or accessory). It is a nominal 10k ohm thermistor attached
to an eyelet mounting ring.
EconoMi$er2 —
The PremierLink control is used with EconoMi$er2
(option or accessory) for outdoor air management. The
damper position is controlled directly by the PremierLink
control; EconoMi$er2 has no internal logic device.
Outdoor air management functions can be enhanced with
field- - installation of these accessory control devices:
Enthalpy control (outdoor air or differential sensors)
Space CO sensor
2
Outdoor air CO
Refer to Table 3 for accessory part numbers.

Field Connections

Field connections for accessory sensor and input devices are
made at the 16- - pole terminal block (TB1) located on the
control box bottom shelf in front of the PremierLink control
(See Figs. 48 and 49). Some input devices also require a
24- - vac signal source; connect at CTB terminal R at
"THERMOSTAT" connection strip for this signal source.
See connections figures on following pages for field
connection locations (and for continued connections at the
PremierLink board inputs).
Table 4 provides a summary of field connections for units
equipped with Space Sensor. Table 5 provides a summary of
field connections for units equipped with Space Thermostat.
RETURN AIR
OUTDOOR AIR
ENTHALPY SENSOR
SENSOR
Required ---
33ZCT55SPT
or equivalent
Requires ---
---
33CSENTHSW
Requires ---
--- 33CSENTHSW
or equivalent
room sensor.
31
sensor
2
RETURN AIR
ENTHALPY SENSOR
---
Requires ---
33CSENTSEN
or equivalent
---
---