Carrier 50TC*D17 Series Installation Instructions Manual page 23

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. 36. The outdoor air CO
sensor must be located in the economizer outside air hood.
COVER REMOVED
Fig. 36 - - 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.
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. 34. Connect the 4 to 20 mA
terminal to the TB1- - 13 terminal of the 50TC*D . Connect
the SIG COM terminal to the TB1- - 11 terminal of the
50TC*D. See Fig. 37.
OAQ Sensor/RH Sensor
SEN
COM
24 VAC
Fig. 37 - - Outdoor CO
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.
Filter Status Switch — This function is available only
when PremierLink is configured for (Space) Sensor Mode.
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.
sensor is
2
) levels in the
2
SIDE VIEW
C07135
Sensor — A dedicated power
2
TB1
PL
13
J5-2
TB1
J5-3
11
C08275
Sensor Connections
2
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. 38.
Filter Switch (NO, close on rising pressure (high drop))
2
Fig. 38 - - PremierLink Filter Switch Connection
When the filter switch's NO contact set closes as filter
pressure drop increases (indicating dirt- - laden filters), the
input signal to PremierLink causes the filter status point to
read "DIRTY".
Using Filter Timer Hours: Refer to Form 33CS- - 58SI for
instructions on using the PremierLink Configuration
screens and on unit alarm sequence.
Supply Fan Status Switch — The PremierLink control can
monitor supply
field- - supplied/installed differential pressure switch. This
sequence will prevent (or interrupt) operation of unit
cooling, heating and economizer functions until the
pressure switch contacts are closed indicating proper
supply fan operation.
Install the differential pressure switch in the supply fan
section according to switch manufacturer's instructions.
Arrange the switch contact to be open on no flow and to
close as pressure rises indicating fan operation.
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- - 8. Setpoint for Supply Fan Status
is set at the switch. See Fig. 39.
Fan (Pressure) Switch (NO, close on rise in pressure)
Fig. 39 - - PremierLink Wiring Fan Pressure Switch
Remote Occupied Switch — The PremierLink control
permits a remote timeclock to override the control's
on- - board occupancy schedule and place the unit into
Occupied mode. This function may also provide a "Door
Switch" time delay function that will terminate cooling
and heating functions after a 2- - 20 minute delay.
Connect one side of the NO contact set on the timeclock
to CTB's THERMOSTAT- - R terminal. Connect the other
side of the timeclock contact to the unit's TB1- - 2 terminal.
23
CTB
Thermostat
R
TB1
10
fan operation through
CTB
Thermostat
R
TB1
8
Connection
PL
J4-4
C08216
a
PL
J4-6
C08118