Supply Air Temperature (Sat) Sensor; Outdoor Air Temperature (Oat) Sensor; Economi$Er2; Field Connections - Carrier 50HCQ Installation Instructions Manual

Supply Air Temperature (SAT) Sensor —
On FIOP−equipped 50HCQ 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 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−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. 40.
SUPPLY AIR
TEMPERATURE
SENSOR
SUPPLY AIR
Fig. 40 − Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE: Refer to the PremierLinkt Controller Installation,
Start−up, and Configuration Instructions for complete
PremierLink controller configuration, operating sequences
and troubleshooting information. Have a copy of this manual
available at unit start−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 heater surfaces.
−in. hole in the flange or duct.
ROOF
CURB
RETURN AIR
C08200
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$er2
(option or accessory) for outdoor air management. The
damper position is controlled directly by the PremierLink
controller; EconoMi$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 8 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
controller (See Fig. 39). 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).
Table 9 provides a summary of field connections for units
equipped with Space Sensor. Table 10 provides a summary
of field connections for units equipped with Space
Thermostat.
27