Supply Air Temperature (SAT) Sensor i
On FIOP-equipped 50TC 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
codes). Drill or punch a 1/2-in. hole in the flange or duct.
Use two field-supplied, self-drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 40.
@ __
SUPPLYAIR
C08200
__ROOF
CURB
Fig. 40 - Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE: Refer to Form 33SC-68SI for complete
PremierLink 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.
Outdoor Air Temperature (OAT) Sensor i
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 1
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 CO2 sensor
Outdoor air CO2 sensor
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 Fig. 38 or 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 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.
Table 3 - PremierLink Sensor Usage
OUTDOOR AIR RETURN AIR
OUTDOOR AIR RETURN AIR
APPLICATION TEMPERATURE TEMPERATURE
ENTHALPY SENSOR ENTHALPY SENSOR
SENSOR SENSOR
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)
Included -
CRTEMPSNOO1AO0
Included -
Not Used
Included -
Not Used
Required -
33ZCT55SPT
or equivalent
Requires -
33CSENTHSW
Requires -
33CSENTHSW
or equivalent
NOTES:
CO 2 Sensors (Optional):
33ZCSENC02 - Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
33ZCASPC02 - Aspirator box used for duct-mounted CO 2 room sensor.
33ZCT55C02 - Space temperature and CO2 room sensor with override.
33ZCT56C02 - Space temperature and CO2 room sensor with override and setpoint.
Requires -
33CSENTSEN
or equivalent
24
To Next Page
Loading...
