Carrier 50TCQA - Page 17

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PremierLinkt (Factory--Option) —
C08199
Fig. 28 -- PremierLink Controller
The PremierLink controller (see Fig. 28) is compatible
with Carrier Comfort Networkr (CCN) devices. This
control is designed to allow users the access and ability to
change factory--defined set tings, thus expanding the
function of the sta ndard unit control board. CCN service
access tools include System Pilot (TM), Touch Pilot (TM)
and Service Tool. (Standard tier display tools Navi gatort
and Scrolling Marquee are not suitable for use with latest
PremierLink controller (Version 2.x).)
The PremierLink control is factory--mounted in the
50TCQ unit’s main control box to the left of the Central
Terminal Board (CTB). Factory wiring is completed
through harnesses connected to the CTB thermostat. Fiel d
connec tions are made at a 16--pole terminal block (TB1)
loca ted on the bottom shelf of the unit control box in front
of the PremierLink controller. The factory--installed
PremierLink control includes the supply--air temperature
(SAT) sensor. The outdoor air temperature (OAT) sensor is
included in t he FIOP/accessory EconoMi$ert2 package.
The PremierLink controll er requires the use of a Carrier
electronic thermostat or a CCN connection for time
broadcast to initiate its internal timeclock. This is
necessary for broadcast of time of day functions
(occupied/unoccupied).
NOTE: PremierLink controller is shipped in Sensor
mode. To be used with a thermostat, the PremierLink
controller must be configure d to Therm ostat mode. Refer
to PremierLink Configuration instructions for Operating
Mode.
Supply Air Temperature (SAT) Sensor — On
FIOP--equipped 50TCQ unit, the unit is suppli ed with a
supply--air temperature (SAT) sensor (33ZCSENSAT).
This sensor is a tubular probe type, approx 6--inches
(12.7 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 t he sensor in the flange of the supply--air
opening or in t he supply air duct (as required by local
codes). Drill or punc h 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. 29.
SUPPLY AIR
RETURN AIR
SUPPLY AIR
TEMPERATURE
SENSOR
ROOF
CURB
C08200
Fig. 29 -- Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE: Refer to Form 33CS--58SI for complete
PremierLink configuration, operating sequences and
troubleshooting information. Have a copy of thi s manual
available at unit start--up.
NOTE: The sensor must be mounted in the discharge
airstre am downstream of the cooling coil and a ny heating
devic es. Be sure the probe tip does not come in contact
with any of the unit’s heater surfaces.
50TCQA