Carrier 50HCQA installation instructions Communication Wiring Protocols, General

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Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Fig. 49 for wire terminations at J5.

Remote Occupancy: The remote occupancy accessory is

afield-installed accessory. This accessory overrides the unoccupied mode and puts the unit in occupied mode. When installing this accessory, the unit must be configured for remote occupancy by setting MENUConfigInputsinput 3, 5, 8, or 9 to Remote Occupancy and normally open (N/O) or normally closed (N/C).

Also set MENUSchedulesoccupancy source to DI on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Table 8 for wire terminations at J5.

Power Exhaust (output): Connect the accessory Power Exhaust contactor coil(s) per Fig. 55.

Power Exhaust

 

 

 

 

 

 

 

 

 

 

 

 

 

PEC

 

TAN

 

J11-3

 

 

 

 

 

 

 

 

 

CTB

 

 

 

 

THERMOSTAT

 

 

GRA

 

C

 

 

 

 

 

 

 

 

C08464

Fig. 55 - RTU-MP Power Exhaust Connections

Space Relative Humidity Sensor: The RH sensor is not used with 50HCQ models at this time.

Communication Wiring - Protocols

General —

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

The RTU-MP can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 56 for the switch setting per protocol. The 3rd party connection to the RTU-MP is through plug J19.

NOTE: Power must be cycled after changing the SW1-3 switch settings.

Refer to the RTU-MP 3rd Party Integration Guide for more detailed information on protocols, 3rd party wiring, and networking.

50HCQA

SW3 Protocol Selection

PROTOCOL

DS8

DS7

DS6

DS5

DS4

DS3

DS2

DS1

 

 

 

 

 

 

 

 

 

BACnet MS/TP

Unused

OFF

OFF

OFF

ON

OFF

Select Baud

Select Baud

(Master)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Modbus

Unused

OFF

OFF

ON

ON

OFF

Select Baud

Select Baud

(Slave)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N2

Unused

OFF

OFF

OFF

ON

ON

OFF

OFF

(Slave)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LonWorks

Unused

ON

ON

OFF

ON

OFF

OFF

OFF

NOTE:

 

 

 

 

 

 

 

 

DS = Dip Switch

 

 

 

 

 

 

 

 

BACnet MS/TP SW3 example shown

Baud Rate Selections

BAUD RATE

DS2

DS1

 

 

 

9600

OFF

OFF

 

 

 

19,200

ON

OFF

 

 

 

38,400

OFF

ON

 

 

 

76,800

ON

ON

 

 

 

C07166

Fig. 56 - RTU-MP SW3 Dip Switch Settings

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing 04 06 Size Units Plan for Unit Location Unit Dimensional Drawing 04 06 Size UnitInspect unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details Field Fabricate Ductwork For Units with Accessory Electric HeatersRig and Place Unit Rigging Details Positioning on Curb Convert to Horizontal and Connect Ductwork when requiredEconomizer Hood Removal and Setup Factory Option Install Outside Air HoodEconomizer Hood and Two-Position Hood Install External Condensate Trap and LineMake Electrical Connections Field Power SupplyConvenience Outlets Units with Factory-Installed DisconnectFactory-Option Thru-Base Connections Weatherproof Cover InstallationThermostat Field Control WiringHeat Anticipator Settings Units without Thru-Base ConnectionsHeater Model Number Field Control Wiring RacewaySingle Point Boxes and Supplementary Fuse Typical Module InstallationPremierLink Controller Supply Air Temperature SAT SensorTypical PremierLink Wiring Schematic EconoMi$ert2 Outdoor Air Temperature OAT SensorSpace Temperature SPT Sensors Field ConnectionsSpace Thermostat Connections PremierLink Sensor Usage Thermostat Mode Space Sensor ModeEconomizer Controls Indoor CO2 Sensor 33ZCSENCO2 Connections Space Relative Humidity Sensor Filter Status SwitchSupply Fan Status Switch Power Exhaust outputRecommended Cables Connecting CCN bus Color Code RecommendationsRTU-MP Control System Typical RTU-MP System Control Wiring Diagram Type of I/O Connection PIN Name Numbers Inputs RTU-MP Controller Inputs and OutputsSpace Temperature Sensor Typical Wiring 33ZCT59SPT RTU-MP / Outdoor CO2 Sensor 33ZCSENCO2 Connections Connecting Discrete InputsGeneral Communication Wiring ProtocolsRTU-MP Troubleshooting Local AccessController LEDsLEDs on the RTU-MP show the status of certain functions SystemSupply Air Smoke Detector LocationsCompleting Installation of Return Air Smoke Sensor See Completing Installation of Return Air SmokeAdditional Application Data STD Unit Wire/Fuse or Hacr Breaker Sizing DataUnit No P.E 208/230 208/230---3 STD EconoMi$er IV Occupancy Switch Adjust Factory-Installed OptionsSmoke Detectors Pre-Start and Start-Up Install AccessoriesCatalog No 50HCQ---01SI

50HCQA specifications

The Carrier 50HCQA is a cutting-edge rooftop air conditioning unit designed for commercial applications, combining efficiency, reliability, and advanced technology to ensure optimal indoor climate control. This model stands out in Carrier's extensive range of HVAC solutions, showcasing a blend of innovative features suitable for diverse building types.

One of the key features of the Carrier 50HCQA is its high-efficiency compressor. With variable-speed capabilities, the compressor adjusts its output to meet the precise cooling or heating demands of the space, promoting energy savings and consistent temperature management. This flexibility results in reduced energy consumption, making the 50HCQA an environmentally friendly choice for businesses looking to lower their carbon footprint.

The 50HCQA integrates advanced microprocessor controls, streamlining operation and enhancing user interaction. This technology allows for sophisticated diagnostics, monitoring, and scheduling, giving facility managers the tools they need to optimize system performance. The user-friendly interface ensures that settings can be easily adjusted, and real-time performance metrics can be accessed to ensure efficient operation.

In terms of construction, the Carrier 50HCQA is built with durability in mind. The unit features a robust cabinet design with a galvanized steel construction that is resistant to corrosion. This feature enhances the longevity of the unit, making it suitable for a variety of weather conditions. Additionally, the insulated casing reduces sound levels, providing a quieter operation that is particularly beneficial in noise-sensitive environments.

Another significant characteristic of the 50HCQA is its environmentally responsible refrigerant options. It utilizes R-410A refrigerant, which has a lower Global Warming Potential (GWP) compared to traditional refrigerants. This aspect not only meets regulatory standards but also supports users in making eco-friendly choices in their HVAC systems.

The 50HCQA also supports a range of optional accessories, including economizers for enhanced energy efficiency and improved air quality. This allows for increased outdoor air intake during suitable conditions, which can significantly contribute to enhancing indoor air quality—an essential factor for occupant comfort and health.

In conclusion, the Carrier 50HCQA is an exemplary model in the commercial HVAC sector, delivering powerful performance, advanced control technologies, and robust construction. Its energy-efficient design, user-friendly controls, and eco-conscious refrigerant options make it a top choice for businesses aiming to invest in sustainable and reliable climate control solutions.