Carrier 50TC installation instructions Indoor CO2 Sensor 33ZCSENCO2 Connections

Page 24

50TC

H G 24 VAC OR

+ - 24 VDC

+ 0-10VDC

- SIG COM + 4-20mA

NC }ALARM

COM RELAY

NO CONTACTS

2 1 8 7 6 5 4 3 2 1

J3 J4

C08635

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 CO2 sensor is designed to monitor carbon dioxide (CO2) 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. 39. The outdoor air CO2 sensor must be located in the economizer outside air hood.

Fig. 37 - Indoor/Outdoor Air Quality (CO2) Sensor

(33ZCSENCO2) - Typical Wiring Diagram

To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return-air grille (if present) so it senses the concentration of CO2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. Allow at least 0.9 m (3 ft) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if 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

TB1PL SEN 9 J5-5

TB1

COM 11 J5-3

24 VAC

C08636

Fig. 38 - Indoor CO2 Sensor (33ZCSENCO2)

Connections

COVER REMOVED

SIDE VIEW

C07135

Fig. 39 - Outdoor Air Quality Sensor Cover

Wiring the Outdoor Air CO2 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. 37. Connect the 4 to 20 mA terminal to the TB1-13 terminal of the 50TC. Connect the SIG COM terminal to the TB1-11 terminal of the 50TC. See Fig. 40.

OAQ Sensor/RH Sensor

TB1PL SEN 13 J5-2

TB1

COM 11 J5-3

24 VAC

C08275

Fig. 40 - Outdoor CO2 Sensor Connections

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.

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Contents Installation Instructions 50TC Unit Dimensional Drawing 07 Size Units Unit Dimensional Drawing 07 Size Unit Unit Dimensional Drawing 08, 09 and 12 Size Units Plan for Unit Location Roof mountPlan for Sequence of Unit Installation Inspect unitProvide Unit Support Roof Curb Details 07 Size Units Roof Curb Details 08 12 Size Units Field Fabricate Ductwork Unit Leveling TolerancesConvert to Horizontal and Connect Ductwork when required Install Outside Air HoodEconomizer Hood Removal and Setup Factory Option Rig and Place UnitTwo Position Damper Hood Removal and Setup Factory OptionEconomizer Hood and Two-Position Hood Install External Condensate Trap and Line Make Electrical ConnectionsUnits with Factory-Installed Disconnect All unitsThru-Base Connections Field Control Wiring Heat Anticipator SettingsUnits without Thru-Base Connections ThermostatElectric Heaters Heater Model NumberAccessory Electric Heater Control Connections PremierLinkt Factory-Option PremierLink ControllerPremierLink Wiring Schematic PremierLink Sensor Usage 33ZCT55SPT CRTEMPSN001A00Space Sensor Mode Thermostat Mode55 Space Temperature Sensor Wiring Enthalpy Switch HH57AC077 Connections Economizer controlsIndoor CO2 Sensor 33ZCSENCO2 Connections PremierLink Filter Switch Connection PremierLink Wiring Fan Pressure Switch ConnectionColor Code Recommendations PremierLink CCN Bus ConnectionsRTU-MP control system RTU-MP Multi-Protocol Control BoardRTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Type of I/O Connection PIN Name Numbers InputsSpace Temperature SPT Sensors RTU-MP T-55 Sensor ConnectionsConnecting Discrete Inputs Filter Status RTU-MP / Indoor CO2 Sensor 33ZCSENCO2 ConnectionsCommunication Wiring Protocols General Fan StatusRemote Occupancy Local Access RTU-MP Troubleshooting Communication LEDsLEDs LEDs on the RTU-MP show the status of certain functionsAdjust Factory-Installed Options Install AccessoriesEconoMi$er IV Occupancy Switch Pre-Start and Start-UpUnit Wire/MOCP Sizing Data STD17.5 108 Disc 50TC Catalog No 50TC---C02SI

50TC specifications

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