Carrier 48HC Space Relative Humidity Sensor Installation, To wire the sensor

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OAQ Sensor

 

TB3

PL

4-20mA

13

 

J5-2

 

 

TB3

 

SIG COM 11 J5-3

24 VAC

C11157

Fig. 49 - Outdoor CO2 Sensor Connections

Space Relative Humidity Sensor or Humidistat Connections —

Space Relative Humidity Sensor connections: The accessory space relative humidity sensor (33ZCSENSRH-01) is installed on an interior wall to measure the relative humidity of the air within the occupied space.

The use of a standard 2 X 4 inch electrical box to accommodate the wiring is recommended for installation. The sensor can be mounted directly on the wall, if acceptable by local codes.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in permanent damage to the sensor.

DO NOT clean or touch the sensing element with chemical solvents as they can permanently damage the sensor.

The sensor must be mounted vertically on the wall. The Carrier logo should be orientated correctly when the sensor is properly mounted.

Avoid corner locations. Allow at least 4 ft between the sensor and any corner. Airflow near corners tends to be reduced, resulting in erratic sensor readings. The sensor should be vertically mounted approximately 5 ft up from the floor, beside the space temperature sensor.

For wiring distances up to 500 feet, use a 3-conductor, 18 or 20 AWG cable. ACCN communication cable can be used, although the shield is not required. The shield must be removed from the sensor end of the cable if this cable is used. See Fig. 51 for wiring details.

TB3-7

TB3-13

BLACK

RED

Io Vin Gnd Vo

48HC

!CAUTION

UNIT PERFORMANCE HAZARD

Failure to follow this caution will result in inaccurate sensor readings.

DO NOT mount the sensor in drafty areas such as near heating or air-conditioning ducts, open windows, fans, or over heat sources such as baseboard heaters, radiators, or wall-mounted dimmers. Sensors mounted in those areas will produce inaccurate readings.

If the sensor is installed directly on a wall service, install the humidity sensor using 2 screws and 2 hollow wall anchors (field supplied). Do not over tighten screws. See Fig. 50.

MOUNTING

HOLES

 

WIRING

Io Vin Gnd Vo

OPENING

SW2

 

 

 

 

 

 

 

 

 

 

 

6

5

4

3

2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C11084

Fig. 50 - Space Relative Humidity Sensor Installation

C11085

Fig. 51 - Space Relative Humidity Sensor Connection

The power for the sensor is provided by the PremierLink control on terminal J5-4 (+33 to +35vdc).

To wire the sensor:

1.At the sensor, remove 4 inches of the jacket from the cable. Strip 1/4 inch of insulation from each conduct- or. Route the cable through the wire clearance open- ing in the center of the sensor. See Fig. 50.

2.Connect a field-supplied BLACK wire to the sensor screw terminal marked Vin.

3.Connect a field-supplied RED wire into the sensor screw terminal marked Io.

4.Connect the field-supplied RED wire from the sensor to TB3-13.

5.Connect the field-supplied BLACK wire from the sensor to TB3-7.

Humidistat connections: A humidistat can not be directly connected to the PremierLink controller. Follow the instructions on pages 24 & 25 to connect a humidistat or a thermostat as an electromechanical device.

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing 17 Size Unit C10897 Unit Dimensional Drawing 20 and 24 Size Units C10893 Unit Dimensional Drawing 28 Size Unit C10901 Operating Weights Plan for Unit LocationRoof Mount Plan for Sequence of Unit Installation Inspect unitProvide Unit Support Roof Curb Details 17 Size Unit Roof Curb Details 20 and 24 Size Units Roof Curb Details 28 Size Unit Rig and Place Unit Field Fabricate DuctworkInstall Outside Air Hood Factory Option Horizontal Duct ConnectionPositioning on Curb Install Gas Piping Install Flue Hood and Combustion Air HoodTo assemble the outside air hood Gas Supply LineNatural Gas Supply Line Pressure Ranges Typical 3/4-in NPT Field Supplied Piping PartsOrifice Hole Factory-Option Thru-Base ConnectionsInstall External Condensate Trap and Line Field Power SupplyMake Electrical Connections All Units Units with Factory-Installed DisconnectPowered Convenience Outlet Wiring Units without Thru-Base Connections Field Control WiringThermostat Unit without Thru-Base Connection KitTypical Low-Voltage Control Connections Transformer Connection for 208-v Power SupplyHumidi-MiZer Space RH Controller Humidi-MiZerRControl ConnectionsTo connect the Carrier humidistat HL38MG029 To connect the Thermidistat device 33CS2PPRH-01OAT RRS Srtn PremierLink Controller PremierLinkt Factory-OptionPremierLink Wiring Schematic PremierLink Wiring Schematic with Humidi-MiZerR Field Connections Supply Air Temperature SAT SensorEconoMi$er2 PremierLink Sensor UsageThermostat Mode Space Sensor ModeSpace Sensors Configure the Unit for Thermostat ModeIndoor Air Quality CO2 Sensor Economizer ControlsTo wire the sensor Space Relative Humidity Sensor InstallationSupply Fan Status Switch Filter Status SwitchPower Exhaust output Smoke Detector/Fire Shutdown FSDConnecting CCN Bus Color Code Recommendations CCN Communication BusRecommended Cables RTU Open Multi-Protocol Control Board RTU Open Control SystemRTU Open System Control Wiring Diagram RTU Open System Control Wiring Diagram with Humidi-MiZerR Type of I/O Connection PIN Name Numbers Dedicated Inputs RTU Open Controller Inputs and OutputsRTU Open T-55 Sensor Connections Space Temperature SPT SensorsRelative Humidity Sensors Space or Duct Mounted Space Relative Humidity Sensor Typical WiringConnecting Discrete Inputs Duct Relative Humidity Sensor Typical WiringGeneral Communication Wiring ProtocolsRTU Open Troubleshooting Local AccessOutdoor Air Enthalpy Control LEDsDifferential Enthalpy Control Wiring Return Air Sensor Tube InstallationSmoke Detectors Unit Wire/Fuse or Hacr Breaker Sizing Data To install the return air sensor sampling tubeSmoke Detector Test Magnet Additional Application DataUnit NOM IFM FAN Motor Exhaust Unbalanced 3-Phase Supply Voltage Install Accessories Adjust Factory-Installed OptionsEconoMi$er IV Occupancy Switch Pre-Start and Start-Up48HC Catalog No 48HC---11SI

48HC specifications

The Carrier 48HC is a highly efficient rooftop HVAC unit designed for commercial applications that prioritize both performance and energy savings. This unit embodies Carrier's commitment to innovation by integrating advanced technologies and features that address the modern demands of building climate control.

One of the standout features of the Carrier 48HC is its exceptional energy efficiency. Employing the latest in variable-speed compressor technology, the unit adjusts its output based on the specific cooling needs of the space, which not only enhances comfort levels but also significantly reduces energy consumption. This feature is crucial for businesses looking to lower their operational costs while minimizing their environmental impact.

The Carrier 48HC is also equipped with a comprehensive range of control options. Through its intelligent control systems, users can utilize features such as demand ventilation, which optimizes indoor air quality while maintaining energy efficiency. The integration with building management systems (BMS) further enhances operational effectiveness, allowing real-time monitoring and adjustments from a centralized point.

Additionally, the 48HC is designed with durability in mind. Its robust construction resists harsh weather conditions and ensures long-lasting performance. The unit features advanced corrosion-resistant materials and coatings, which prolong its lifespan and reduce maintenance needs. This durability makes the 48HC a reliable choice for varying environments, whether it’s an industrial setting or a more delicate commercial space.

The unit’s compact design also deserves mention, as it facilitates easier installation on rooftops without taking up excessive space. The modular design allows for customization, enabling businesses to tailor their systems to fit specific heating and cooling requirements.

In terms of comfort, the Carrier 48HC employs efficient air distribution technology that ensures even airflow throughout the space. This greatly enhances occupant comfort by eliminating hot or cold spots, promoting a consistent indoor climate.

Finally, the 48HC complies with stringent environmental regulations and standards. With options for environmentally-friendly refrigerants, it supports businesses in their sustainability efforts while operating effectively under current regulations.

In summary, the Carrier 48HC stands out in the crowded HVAC market due to its advanced technology, energy efficiency, durability, and adaptability for commercial applications, making it a top choice for those looking to invest in a reliable and effective climate control solution.
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