Supply Air Temperature Sensor; Field Connections - Carrier WeatherMaster 50HC14 Installation Instructions Manual

Supply Air Temperature (SAT) Sensor
On FIOP-equipped 50HC 14 units, the unit is supplied
with a supply-air temperature (SAT) sensor (33ZCSENSAT).
This sensor is a tubular probe type, approx 6-in. (152 mm) in
length. It is a nominal 10k 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-po-
sition the sensor in the flange of the supply-air opening or in
the supply air duct (as required by local codes). Drill or punch
a 1 / -in. hole in the flange or duct. Use the template provided
2
in the unit control box. Use two field-supplied, self-drilling
screws to secure the sensor probe in a horizontal orientation.
See Fig. 62.
SUPPLY AIR
TEMPERATURE
SENSOR
SUPPLY AIR
Fig. 62 — Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE: Refer to PremierLink Controller Installation, Start-up,
and Configuration Instructions for complete PremierLink
controller configuration,
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
sensor.
33ZCT55CO2 — Space temperature and CO
ride.
33ZCT56CO2 — Space temperature and CO
ride and setpoint.
ROOF
CURB
RETURN AIR
operating sequences and
Table 20 — PremierLink Controller Sensor Usage
OUTDOOR AIR
TEMPERATURE
SENSOR
Included —
CRTEMPSN001A00
Included — Not Used
Included — Not Used
room
2
room sensor with over-
2
room sensor with over-
2
troubleshooting information. Have a copy of this manual
available at unit set-up.
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 heat-
er 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 controller is used with EconoMi$er2
(option or accessory) for outdoor air management. The damp-
er position is controlled directly by the PremierLink control-
ler; EconoMi$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 sensor
2
Refer to Table 20 for accessory part numbers.

Field Connections

Field connections for accessory sensor and input devices
are made at the 16-pole terminal block (TB3) located beneath
the PremierLink controller (See Fig. 60). 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 controller board inputs). Route wires to control
box as indicated in Fig. 39.
Table 21 provides a summary of field connections for units
equipped with Space Sensor. Table 22 provides a summary of
field connections for units equipped with Space Thermostat.
RETURN AIR
OUTDOOR AIR
TEMPERATURE
ENTHALPY SENSOR
SENSOR
Required —
33ZCT55SPT or
equivalent
Requires —
—
33CSENTHSW
Requires —
— 33CSENTHSW or
equivalent
46
RETURN AIR ENTHALPY
SENSOR
— —
—
Requires —
33CSENTSEN or
equivalent