Carrier 50TCQD Installation Instructions Manual page 25

the supply air is blown directly onto the sensor or if the
supply air does not have a chance to mix with the room air
before it is drawn into the return airstream.
Wiring the Indoor Air Quality Sensor —
For each sensor, use two 2- - conductor 18 AWG (American
Wire Gage) twisted- - pair cables (unshielded) to connect
the separate isolated 24 vac power source to the sensor
and to connect the sensor to the control board terminals.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
sensor. See Fig. 37. Connect the 4- - 20 mA terminal to
terminal TB1- - 9 and connect the SIG COM terminal to
terminal TB1- - 11. See Fig. 38.
IAQ Sensor
SEN
COM
24 VAC
Fig. 38 - - Indoor CO
2
Connections
Refer to Form 33CS- - 58SI, PremierLink Installation,
Start- - up, and Configuration Instructions, for detailed
configuration information.
Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus
weatherproof enclosure) — The outdoor air CO
designed to monitor carbon dioxide (CO
outside ventilation air and interface with the ventilation
damper in an HVAC system. The OAQ sensor is packaged
with an outdoor cover. See Fig. 39. The outdoor air CO
sensor must be located in the economizer outside air hood.
COVER REMOVED
Fig. 39 - - Outdoor Air Quality Sensor Cover
Wiring the Outdoor Air CO
supply is required for this sensor. A two- - wire cable is
required to wire the dedicated power supply for the sensor.
TB1 PL
9 J5-5
TB1
11 J5-3
C08636
Sensor (33ZCSENCO2)
sensor is
2
) levels in the
2
SIDE VIEW
C07135
Sensor — A dedicated power
2
The two wires should be connected to the power supply
and terminals 1 and 2.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
OAQ sensor. See Fig. 37. Connect the 4 to 20 mA
terminal to the TB1- - 13 terminal of the 50TCQD .
Connect the SIG COM terminal to the TB1- - 11 terminal of
the 50TCQD. See Fig. 40.
OAQ Sensor/RH Sensor
SEN
COM
24 VAC
Fig. 40 - - Outdoor CO
Smoke Detector/Fire Shutdown (FSD) — This function is
available only when PremierLink is configured for
(Space) Sensor Mode. The unit is factory- - wired for
PremierLink FSD operation when PremierLink is
factory- - installed.
On 50TCQD units equipped with factory- - installed Smoke
Detector(s), the smoke detector controller implements the
unit shutdown through its NC contact set connected to the
unit's CTB input. The FSD function is initiated via the
smoke detector's Alarm NO contact set. The PremierLink
communicates the smoke detector's tripped status to the
CCN building control. See Fig. 29, the PremierLink
wiring schematic.
Filter Status Switch — This function is available only
when PremierLink is configured for (Space) Sensor Mode.
2
PremierLink control can monitor return filter status in two
ways: By monitoring a field- - supplied/installed filter
pressure switch or via supply fan runtime hours.
Using switch input: Install the dirty filter pressure switch
according to switch manufacturer's instructions, to
measure pressure drop across the unit's return filters.
Connect one side of the switch's NO contact set to CTB's
THERMOSTAT- - R terminal. Connect the other side of the
NO contact set to TB1- - 10. Setpoint for Dirty Filter is set
at the switch. See Fig. 41.
Filter Switch (NO, close on rising pressure (high drop))
Fig. 41 - - PremierLink Filter Switch Connection
When the filter switch's NO contact set closes as filter
pressure drop increases (indicating dirt- - laden filters), the
25
TB1
PL
13
J5-2
TB1
J5-3
11
C08275
Sensor Connections
2
CTB
Thermostat
R
TB1 PL
10 J4-4
C08216