Carrier 30HL050, 060 Minimum Cooler and Condenser Flow Rates Minimum Loop Volume, Application

Page 17

The cooler ¯uid inlet and outlet connections are grooved- end. On 30HW units, the ¯uid enters at the top connection and leaves at the bottom connection. Procedures for making the grooved-end connections are the same as for the 30HWB condensers. See 30HWB Condenser section on page 16 for more details.

Run the pump for 10 minutes, then clean the strainer be- fore starting the unit.

A cooler ¯ow switch must be ®eld-installed on all units. This should be a differential pressure switch that is installed between the cooler ¯uid inlet and outlet. The switch should be set to open when the cooler ¯uid ¯ow drops below the values shown in Table 3. Use the cooler water pressure drop curves (Fig. 16) to determine correct setting for each unit size. Use Carrier accessory ¯ow switch, part number 30HW900003. See Table 3 for Minimum Flow rates and loop volumes.

See Step 6 Ð Make Electrical Connections section on page 19 for ¯ow switch wiring details.

30HK, HL Units Ð The thermistor used for sensing ¯uid temperature is factory-installed in the cooler leaving ¯uid line.

30HW Units Ð The thermistor used for sensing the ¯uid temperature is inside the cooler leaving-water cavity.

COOLER PRESSURE DROP Ð 30HW UNITS

Table 3 Ð Minimum Cooler and Condenser Flow

Rates Minimum Loop Volume

UNIT SIZE

COOLER

CONDENSER*

MINIMUM COOLER

 

 

 

 

LOOP VOLUME²

 

Gal./Min

L/s

Gal./Min

L/s

Gal.

L

30HK040

56.0

3.5

67

4.23

120

454.2

30HK,HL050

68.0

4.3

76

4.79

148

560.2

30HK,HL060

68.0

4.3

83

5.24

174

658.6

30HW018

22.5

1.4

22.5

1.4

44

167

30HW025

30.0

1.9

30.0

1.9

59

223

30HW028

37.5

2.4

37.5

2.4

76

288

30HW035

45.0

2.8

45.0

2.8

85

322

30HW040

57.0

3.6

57.0

3.6

113

428

LEGEND

ARI Ð Air Conditioning and Refrigeration Institute

NÐ Liters per kW

V Ð Gallons per ton

*30HK, HWB, HWC and HWS only. ²Minimum system ¯uid volumes.

NOTES:

Gallons = V x ARI capacity in tons.

Liters = N x ARI capacity in kW.

APPLICATION

V

N

Normal Air Conditioning

3

3.25

Process Type Cooling

6 to 10

6.5 to 10.8

Low Ambient Operation

6 to 10

6.5 to 10.8

COOLER PRESSURE DROP Ð 30HK, HL UNITS

NOTE: Ft of water = 2.31 x change in psig.

Fig. 16 Ð Cooler and Condenser Water Pressure Drop

17

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Contents Contents Installation, Start-Up Service InstructionsGeneral Safety ConsiderationsRig and Place Unit InstallationPlace the Unit 30HW UnitsLeft Side View TOP ViewUnit SAETOP View Front View Right Side View 30HL050,060 CondenserlessRear View Left Side View 30HWB 30HWB018-040 Fluid Cooled30HWC,S Left Side View Front ViewWeight Distribution AT Each Mounting HOLE, 50 HZ Units Weight Distribution AT Each Mounting HOLE, 60 HZ UnitsLocation of Mounting Holes 30HWA,B 30HWC,SHWC,S HWBCompressor CoolerRefrigerant Ð kg Condenser Connections Ð Physical Data 30HL, HWA Condenserless Units Ð EnglishÐ Physical Data 30HL, HWA Condenserless Units Ð SI Factory-Installed Unit Wheels Typical Piping with Fluid-Cooled 30HWB Unit Shown Page Cooler Description Installed Coupling Fastening Grooved Pipe EndsUnit Size Cooler Condenser Minimum Cooler Loop VOLUME² Minimum Cooler and Condenser Flow Rates Minimum Loop VolumeCooler Pressure Drop Ð 30HW Units Cooler Pressure Drop Ð 30HK, HL UnitsCondenser Pressure Drop Ð Page Unit Size Ð Electrical Data Ð 30HK, HWB, HWC, HWS Fluid-Cooled UnitsICF LRA MTAÐ Electrical Data Ð 30HL and HWA Condenserless Units CWP Field Accessory WiringDLS GCSEquip COMGND TORHGS PRISEC HPSInitial Check PRE-START-UPElectric Shock Hazard NeutTypical Deadband Requirements Deadband SettingCheck Refrigerant Charge Operating Limitations START-UP and OperationCheck Refrigerant Feed Components To ADD OILCompressor and Unit Protective Devices Pressure Relief Valve SettingsCheck Unit Safeties Crankcase HeaterFactory Settings, Low-Pressure Switch Fixed Factory Settings, High-Pressure Switch FixedFREEZE-UP Protection Unit OperationCapacity Control and Operating Sequence Ð Capacity Control Steps Ð 30HK, HL Standard Units Transfer Switch Compressor Unit Control No Position StepsCapacity Control Steps Ð 30HW Standard Units ServiceUnit Capacity Control Operating Steps CylindersThermistor Thermistor REPLACEMENT, 30HK, HL UnitsTemperature Resistance Ohms Ð Sensor Temperature F vs ResistanceÐ Sensor Temperature C vs Resistance Tightening Cooler Head Bolts Servicing Cooler 30HK,HL onlyPlugs and Tubes Components for Part Number PluggingHead Bolt Tightening Sequence TroubleshootingChilled Fluid PROOF-OF-FLOW Switches Open Symptoms Cause Remedy TroubleshootingCompressor Call for Free Catalog Service TrainingPreliminary Equipment Check YES or no START-UP Checklist for Chiller SystemsRemove and use for job le Preliminary Information Voltage Imbalance LOCATE, REPAIR, and Report ANY R-22 LeaksFluid Entering Cooler Unit Start-UpFluid Leaving Cooler Units Rated MIN. Pressure Drop =Book 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.

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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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