Bryant F - Manual (Page 42)

42
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
sensor. (See Fig. 52.) Connect the 4--20 mA terminal to
RTU--MP J4--2 and connect the SIG COM terminal to
RTU--MP J4--3. (See Fig. 53.)
SEN
COM
J4-2
J4-3
IAQ Sensor
24 VAC
C08462
Fig. 53 -- RTU--MP / Indoor CO
2
Sensor
(33ZCSENCO2) Connections
Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus
Weatherproof Enclosure)
The outdoor air CO
2
sensor is designed to monitor carbon
dioxide (CO
2
) levels in the outside ventilation air and
interface with the ventilation damper in an HVAC system.
The OAQ sensor is packaged with an outdoor cover. (See
Fig. 54.) The outdoor air CO
2
sensor must be located in
the economizer outside air hood.
COVER REMOVED SIDE VIEW
C07135
Fig. 54 -- Outdoor Air Quality Sensor Cover
Wiring the Outdoor Air CO
2
Sensor
A dedicated power 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. 52.) Connect the 4 to 20 mA
terminal to RTU--MP J4--5. Connect the SIG COM
terminal to RTU--MP J4--6. (See Fig. 55.)
SEN
COM
J4-5
J4-6
OAQ Sensor/RH Sensor
24 VAC
C08463
Fig. 55 -- RTU--MP / Outdoor CO
2
Sensor
(33ZCSENCO2) Connections
On 580J 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 LCTB input. The FSD function is initiated via the
smoke detector’s Alarm NO contact set. The RTU--MP
controller communicates the smoke detector’s tripped
status to the BAS building control. See Fig. 26 for unit
smoke detector wiring.
The Fire Shutdown Switch configuration,
MENU → Config → Inputs → input 5, identifies the
normally open status of this input when there is no fire
alarm.
Alarm state is reset when the smoke detector alarm
condition is cleared and reset at the smoke detector in the
unit.
Connecting Discrete Inputs
Filter Status
The filter status accessory is a field--installed accessory.
This accessory detects plugged filters. When installing
this accessory, the unit must be configured for filter status
by setting MENU → Config → Inputs → input 3, 5, 8, or 9
to Filter Status and normally open (N/O) or normally
closed (N/C). Input 8 or 9 is recommended for easy of
installation. Refer to Fig. 42 and 43 for wire terminations
at J5.
Fan Status
The fan status accessory is a field--installed accessory.
This accessory detects when the indoor fan is blowing air.
When installing this accessory, the unit must be
configured for fan status by setting
MENU → Config → Inputs → input 3, 5, 8, or 9 to Fan
Status and normally open (N/O) or normally closed (N/C).
Input 8 or 9 is recommended for easy of installation. Refer
to Fig. 42 and 43 for wire terminations at J5.
580J