Carrier 50XJ064-104 specifications Compressor MUX Board Voltages, Comp Volts Range

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Table 21 — Compressor MUX Board Voltages

COMP

VOLTS

RANGE

None

1.86

1.50 < V < .95

1

2.88

last val < = V < 2.95

2

3.59

last val < = V < 3.68

1,2

4.44

last val < = V < 4.55

3

5.13

last val < = V < 5.25

4

5.71

last val < = V < 5.85

and CMP4 is on

 

 

1,3

5.85

last val < = V < 5.99

1,4

6.39

last val < = V < 6.51

and CMP4 is on

 

 

2,3

6.36

last val < = V < 6.54

2,4

6.87

last val < = V < 7.03

and CMP4 is on

 

 

1,2,3

6.99

last val < = V < 7.15

1,2,4

7.46

last val < = V < 7.63

3,4

7.94

last val < = V < 8.11

1,3,4

8.45

last val < = V < 8.58

2,3,4

8.81

last val < = V < 8.99

1,2,3,4

9.26

V > 8.99

CONDENSER WATER FLOW — This is an optional switch that can be used with the OMNIZONE™ controller. A thermal dispersion flow switch detects water flowing past the sensor element and closes normally open contacts that energize a relay with normally open contacts to the unit controller. If no flow switch is installed, a jumper must be in place to indicate that there is water flow all the time in order for the economizer and compressors to operate. A configuration decision is used to indicate if a flow switch is installed and disable alarms from the flow switch. When the flow switch is installed, the controller will check for water flow when flow is requested for unit operation. The controller will also test or to see if there is water flow when the unit is not operating. If there is no flow when the unit is operating or if there is flow when the unit is not operating, the warning relay will energize and the yellow light will be lit. If only loss of flow indication is desired, the configuration for the flow switch may be set to no and the controller will only energize the warning relay and turn on the yellow light if there is a loss of flow while the unit is in operation.

DIRTY FILTERS INPUT — This air pressure delta switch is factory installed in the 50XJ unit. It receives 5 vdc from the unit controller and monitors air pressure delta across the return air filters. Switch is normally open, with manually adjustable setting at the switch between 0.5 to 1.5 in. wg. Upon closure, controller should wait to assure closure for minimum 1 minute, and then indicate an alarm both via its Alarm Output and via communications. However, all other unit operation should remain normal.

A phase loss reversal switch may be installed in the unit to detect over, under voltage conditions and phase loss or reversal. Upon switch opening, the controller outputs will be forced to off with safety forces, the alarm output will close and the red Alarm light will be lit. A system alarm will be generated and displayed on the unit keypad. Unit reset is automatic when the voltage and power phases have been restored.

ECONOMIZER COIL FREEZE PROTECTION SWITCH — This switch is installed in the 50XJ unit when the economizer coil is provided. In the event the freeze protection switch contacts open, the ventilation request output will be closed for 15 minutes and the Warning light will light. If the freeze protection switch contacts are still open after 15 minutes, the supply fan will be stopped, all compressor cooling will stop, the economizer valve will open to 100%, the pump request output will remain on, and the Alarm light will light. This will maintain condenser water flow through the coil to prevent freezing the coil while stopping all other operations that could have contributed or will be affected by the freeze condition. Unit reset is automatic when the contacts on the freeze protection switch close again. The contacts on the freeze protection switch open below 37 F.

SUPPLY FAN STATUS — Supply fan status is determined by the duct static pressure sensor. If the fan is operating and a fan speed signal is sent to the variable frequency drive, the duct static pressure must become greater than the supply fan status high set point (SETPT01) for the supply fan status software point to turn on. When the duct static pressure becomes lower than the supply fan status low set point, the supply fan status will indicate OFF. If at any time the commanded state of the supply fan does not agree with the supply fan status for more than a minute, a supply fan status warning will be issued and the warning light will be lit.

COMPRESSOR STATUS — Compressor status is determined from the compressor MUX voltage input to the OMNIZONE controller. If at any time the compressor status indicates off for more than 30 seconds when the compressor commanded state is on, the compressor will be turned off with a safety force and the controller will try to start the compressor after five minutes. If the compressor status does not indicate on for more than 30 seconds then the compressor will be turned off again with a safety force for ten minutes. The controller will then try to restart the compressor a second time. If the compressor status does not come on within 30 seconds the compressor will be turned off for 15-minutes this time. After the 15-minute delay the controller will try to restart the compressor for a third time. If the compressor does not start it will be locked out for this operating cycle and will not be restarted until the OMNIZONE controller goes through an off cycle where the cooling and supply fan are shut down. When the compressor is going through the three restarts or when it is locked out the Warning light will be lit and the specific compressor alarm will be indicated on the display and via communications. The three strikes compressor test is reset automatically if the compressor status comes on while the compressor is on.

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Contents Controls Operation Troubleshooting Page SW2 SW3 SW1 Control Inputs and OutputsManufacturer Part Number Communication Cable RecommendationsWhen the unit is off, both valves are closed Field Terminal Blocks for 50XJ Unit Space Temperature Sensor Typical Wiring 33ZCT55SPT Operative Keys LID Function KeysNumeric Keys Operative USE KeysOmnizone Vpac KEY Algo Stat Hist Srvc Alrm SET Quick Access ChartOmnizone Page SETPT01 OMNIZONESETPT02 Controller Set PointsSoftware Points Configuration ParametersController Hardware Points Operation Page Page RUN VFD Non-Trip Messages for 50XJ Unit Keys and Functions for 50XJ VFDVFD Trip Messages for 50XJ Unit Down VFD Mode Summary for 50XJ UnitKEY Operaton LED Message Explanation 50BV VFD Display Trip Messages for 50BV VFD Non-Trip Messages for the 50BV VFDOL2 OL1Epho EPH1Error Communication Problem Possible Causes Remedies Code Clearing a Forced Input or Output Run Test TroubleshootingForcing an Input or Output Alarms Displayed at Unit LID Comp Volts Range Compressor MUX Board VoltagesUnit Wiring 50BVJ,K Low Voltage Schematic50BVJ,K High Voltage Schematic TRANS-3 24VAC BLU 50BVW,X Low Voltage Schematic50BVW,X High Voltage Schematic PCB2 J1 50BVJ,K,W,X Field-Installed Low Voltage Schematic3 4 5 6 7 50BVJ,K Field-Installed Low Voltage SchemticField Wiring 50BVW,X Field-installed Low Voltage SchematicAqua RoccSPT BpssLOW Voltage Control Wiring 50XJ Low Voltage Control WiringBLK VIO Switch Settings 50XJ 115V Control WiringPower Wiring 50XJ Power WiringPCB3 50BV,XJ Accessory Control Module PCB3 SchematicCdwfs HeatHRN IFMDescription Value Units Status Force Name Rsetrto NumcmpCdwf 0=NO,1=YES Cdfwswt Econ 0=NO,1=YES Ewtsns EwtrstDescription Value Units Name SETPT09 PntnameSENSDI00 SETPT00High Conversion Endpoint 309.77 Comparison Point OMNIZONEDSALM02 Phase Protection Monitored Input Point OMNIZONEDSALM05 Fire alarm Monitored Input Point OMNIZONEDSALM08 Compressor 1 Alarm Monitored Input Point DISCRO00 LINK09 OMNIZONEINTLK02 Ok to Cool Discrete Output Point SETPT03 VOLTI00NTFC00 HCVAV01OMNIZONELMALM02 Entering WaterTemp Monitored Input Point DOW2 DOW1DOW3 DOW4Maintenance Screens Ccvvrf FalseADAPT03 LMALM03ADAPT01 ADAPT02Eeprom RAMDodxrf Description Value Units Status Force Name CCVAV01 ANCTL01Resched Taskstat LMALM02Tasktimr Exetime

50XJ064-104 specifications

The Carrier 50XJ064-104 is a high-efficiency rooftop air conditioning system designed to deliver exceptional cooling and heating capabilities for diverse commercial applications. One of the standout features of this model is its robust cooling capacity of 64,000 BTUs, making it suitable for mid to large-sized spaces. The 50XJ064-104 is engineered using advanced technologies to ensure energy efficiency and reliable performance, contributing to reduced operational costs and environmental sustainability.

One of the primary technologies employed in the Carrier 50XJ064-104 is the high-efficiency scroll compressor. This component plays a pivotal role in optimizing energy usage while delivering consistent cooling output. The system also incorporates an economizer that allows for enhanced energy savings by utilizing outdoor air for cooling when conditions are favorable. This not only decreases reliance on the compressor but also improves indoor air quality.

The microprocessor-based controls in the 50XJ064-104 provide precise temperature regulation, ensuring optimal comfort levels in various applications. These controls allow for easy programming and can be integrated into building management systems for centralized oversight. Additionally, the unit features a built-in fault detection and diagnostic system that aids in identifying potential issues before they escalate, minimizing downtime and maintenance costs.

The Carrier 50XJ064-104 is designed with durability in mind. It features a weather-resistant cabinet, designed to withstand harsh outdoor conditions and prolong service life. The high-quality insulation within the unit not only enhances energy efficiency but also minimizes noise levels, making it an ideal choice for urban environments where sound control is critical.

Another important characteristic is its environmentally friendly R-410A refrigerant, which has a lower impact on ozone depletion compared to older refrigerants. This aligns with Carrier's commitment to creating sustainable HVAC solutions that comply with current environmental regulations.

Overall, the Carrier 50XJ064-104 stands out for its combination of efficiency, advanced technologies, and durable construction. Whether for commercial buildings, retail spaces, or industrial applications, this rooftop air conditioning unit is designed to provide reliable performance and comfort year-round.
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