Carrier 30HK040-060, 30HW018-040, 30HL050 specifications Compressor

Page 39

Table 14 Ð Troubleshooting (cont)

SYMPTOMS

CAUSE

REMEDY

Compressor

Leak in system

Repair leak.

loses oil

Mechanical damage (blown piston or broken

Repair damage or replace compressor as needed.

 

discharge valve)

 

 

Oil trapped in line

Check piping for oil traps.

 

Crankcase heater not energized

Check wiring and crankcase heater contacts on the

 

during shutdown

temperature controller, and replace heater if necessary.

Hot liquid line

Shortage of refrigerant due to leak

Repair leak and recharge.

Frosted liquid line

Shutoff valve partially closed or restricted

Open valve or remove restriction.

 

Restricted ®lter drier

Replace ®lter drier.

Frosted suction line

Expansion valve admitting excess refrigerant

Adjust expansion valve. Replace valve if defective.

Compressor will

Burned-out coil

Replace coil.

not unload

 

 

Defective capacity control valve

Replace valve.

 

 

Miswired solenoid

Rewire correctly.

 

Weak, broken, or wrong valve body spring

Replace spring.

Compressor will

Miswired solenoid

Rewire correctly.

not load

 

 

Defective capacity control valve

Replace valve.

 

 

Plugged strainer (high side)

Clean or replace strainer.

 

Stuck or damaged unloader piston or piston ring(s)

Clean or replace the necessary parts.

System noises

Piping vibration

Support piping as required.

 

 

Check for loose pipe connectors.

 

Expansion valve hissing

Add refrigerant.

 

 

Check for plugged liquid line strainer.

 

Compressor noisy

Check valve plates for valve noise.

 

 

Replace compressor (worn bearings).

 

 

Check for loose compressor holddown bolts.

Freeze-up

Improper charging

Make sure a full quantity of ¯uid is ¯owing through the

 

 

cooler while charging, and suction pressure in cooler is

 

 

equal to or greater than pressure corresponding to 32 F

 

 

(0° C) (58 psig [400 kPa] for Refrigerant 22).

 

Improperly set safety thermostat

Check safety thermostat for proper setting at beginning of

 

 

each season.

 

Operating with safety thermostat bypassed

If thermostat was bypassed for checking, be sure it is back

 

 

in circuit before starting unit.

 

Improper circulation of condenser water

Use adequately sized cleanable strainer in the condenser

 

 

water circuit. Make sure strainer is clean. It may sometimes

 

 

be necessary to chemically treat the water to prevent for-

 

 

mation of deposits.

 

System not drained for winter shutdown

Remove drain plugs at end of cooling season. Blow out any

 

 

residual water. Instead of draining, a suitable anti-freeze

 

 

may be added to the water. Damage to chiller due to freez-

 

 

ing is considered abuse and is not covered by warranty.

 

Loose Thermistor

Tighten thermistor to pipe and reinsulate (30HW).

39

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Contents Contents Installation, Start-Up Service InstructionsGeneral Safety Considerations30HW Units InstallationRig and Place Unit Place the UnitSAE TOP ViewLeft Side View UnitTOP View Front View Right Side View 30HL050,060 CondenserlessRear View Left Side View 30HWB 30HWB018-040 Fluid Cooled30HWC,S Left Side View Front View30HWA,B 30HWC,S Weight Distribution AT Each Mounting HOLE, 60 HZ UnitsWeight Distribution AT Each Mounting HOLE, 50 HZ Units Location of Mounting HolesCooler HWBHWC,S CompressorRefrigerant Ð kg Ð Physical Data 30HL, HWA Condenserless Units Ð English Ð Physical Data 30HL, HWA Condenserless Units Ð SICondenser Connections Factory-Installed Unit Wheels Typical Piping with Fluid-Cooled 30HWB Unit Shown Page Cooler Description Installed Coupling Fastening Grooved Pipe EndsCooler Pressure Drop Ð 30HK, HL Units Minimum Cooler and Condenser Flow Rates Minimum Loop VolumeUnit Size Cooler Condenser Minimum Cooler Loop VOLUME² Cooler Pressure Drop Ð 30HW UnitsCondenser Pressure Drop Ð Page LRA MTA Ð Electrical Data Ð 30HK, HWB, HWC, HWS Fluid-Cooled UnitsUnit Size ICFÐ Electrical Data Ð 30HL and HWA Condenserless Units GCS Field Accessory WiringCWP DLSTOR COMEquip GNDHPS PRIHGS SECNeut PRE-START-UPInitial Check Electric Shock HazardDeadband Setting Check Refrigerant ChargeTypical Deadband Requirements To ADD OIL START-UP and OperationOperating Limitations Check Refrigerant Feed ComponentsCrankcase Heater Pressure Relief Valve SettingsCompressor and Unit Protective Devices Check Unit SafetiesFactory Settings, Low-Pressure Switch Fixed Factory Settings, High-Pressure Switch FixedUnit Operation Capacity Control and Operating Sequence ÐFREEZE-UP Protection Capacity Control Steps Ð 30HK, HL Standard Units Transfer Switch Compressor Unit Control No Position StepsSteps Cylinders ServiceCapacity Control Steps Ð 30HW Standard Units Unit Capacity Control OperatingThermistor Thermistor REPLACEMENT, 30HK, HL UnitsTemperature Resistance Ohms Ð Sensor Temperature F vs ResistanceÐ Sensor Temperature C vs Resistance Components for Part Number Plugging Servicing Cooler 30HK,HL onlyTightening Cooler Head Bolts Plugs and TubesTroubleshooting Chilled Fluid PROOF-OF-FLOW Switches OpenHead Bolt Tightening Sequence Symptoms Cause Remedy TroubleshootingCompressor Call for Free Catalog Service TrainingSTART-UP Checklist for Chiller Systems Remove and use for job le Preliminary InformationPreliminary Equipment Check YES or no Voltage Imbalance LOCATE, REPAIR, and Report ANY R-22 LeaksUnits Rated MIN. Pressure Drop = Unit Start-UpFluid Entering Cooler Fluid Leaving CoolerBook Catalog No Form 30H-10SI Pg CL-4 11-98

30HK040-060, 060, 30HL050, 30HW018-040 specifications

The Carrier 30HW018-040, 30HL050, 060, and 30HK040-060 series represents a range of advanced rooftop units designed to meet the diverse heating and cooling needs of commercial buildings. Renowned for their efficiency and performance, these units incorporate cutting-edge technologies to improve operational effectiveness and reduce energy consumption.

One of the standout features of the Carrier 30HW series is its high-efficiency scroll compressors, which are engineered to provide exceptional cooling capacity while minimizing energy usage. These compressors operate quietly and ensure smooth performance across varying loads. Additionally, the units utilize advanced microprocessor controls that enhance system efficiency by enabling precise temperature regulation and optimizing energy consumption based on real-time weather conditions.

Another important aspect of the 30HL series is its ability to provide reliable heating and cooling capabilities even in extreme weather conditions. With robust heat exchangers and a range of variable-speed fans, these units can efficiently circulate air while maintaining optimal indoor comfort levels. Variable-speed technology not only enhances comfort but also improves energy savings, as the system can adjust its output based on occupancy and external temperature fluctuations.

The 30HK series, specifically designed for high-performance applications, features enhanced filtration systems which improve indoor air quality. These systems are capable of accommodating various filter types, ensuring that airborne contaminants are effectively captured. This makes the 30HK a suitable choice for environments where air quality is a priority, such as schools, hospitals, and commercial offices.

Moreover, all units in the 30HW, 30HL, and 30HK series are designed with ease of maintenance in mind. Removable panels and easy access points allow for quick servicing and reduces downtime. The compact design also ensures that installation is straightforward, making them a preferred choice for many contractors.

In summary, Carrier's 30HW018-040, 30HL050, 060, and 30HK040-060 series are integral solutions in the HVAC market, combining energy efficiency, advanced controls, and superior air quality features. These rooftop units are tailored for commercial applications, providing reliable heating and cooling solutions while prioritizing comfort and sustainability. Through continuous innovation, Carrier remains at the forefront of HVAC technology, ensuring that their products meet the evolving demands of the industry.
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