Carrier 17EX specifications Return Chiller to Normal Operating Conditions, General Maintenance

Page 67

Transferring Refrigerant into the Cooler/ Condenser/Compressor Section Ð These steps de- scribe how to transfer refrigerant from the economizer/ storage vessel into the cooler/condenser/compressor section. This is normally done to prepare for service work on the economizer/storage vessel.

1. Isolate and push refrigerant into the cooler/condenser/ compressor section:

a. Valve positions:

VALVE

1

2

3

4

5

6

7

8

9

10

11

CONDITION

 

C

 

 

C

 

 

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

b. Turn off chiller water pumps and pumpout condenser water.

c. Turn on the pumpout compressor to push refrigerant out of the economizer/storage vessel.

d. When all liquid refrigerant is out of the economizer/ storage vessel, close the cooler isolation valve 7.

e. Turn off the pumpout compressor.

2. Evacuate refrigerant from the economizer/storage vessel. a. Access the CONTROL TEST table on the LID. Select the PUMPDOWN LOCKOUT screen. From this screen, turn on the chiller water pumps and monitor vessel

pressures.

b. Valve positions: Close valves 3 and 4, open valves 2 and 5.

VALVE

1

2

3

4

5

6

7

8

9

10

11

CONDITION

 

 

C

C

 

 

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

c. Turn on the pumpout condenser water.

d. Run the pumpout compressor until the suction reaches 15 in. Hg (50 kPa abs). Monitor pressures on the LID and on refrigerant gages.

e. Close valve 6.

f. Turn off the pumpout compressor.

g. Close valves 1, 2, and 5 (all valves are now closed). h. Turn off the pumpout condenser water.

i. From the CONTROL TEST table on the LID, turn off the chiller water pumps and lock out the chiller com- pressor from operation.

Return Chiller to Normal Operating Conditions

1.

Be sure that the vessel that was opened has been evacu-

 

ated and dehydrated.

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Access the CONTROL TEST table. From this table, se-

 

lect the TERMINATE LOCKOUT function to view the

 

vessel pressures and to turn on chiller water pumps.

3.

Open valves 1, 3, and 6.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VALVE

1

 

2

 

3

4

5

6

 

7

8

9

10

11

 

 

CONDITION

 

 

C

 

 

C

 

C

 

 

 

C

C

C

C

C

4.

Slowly open valve 5, gradually increasing pressure

 

in the evacuated

 

vessel

 

to

35

psig

(141

kPa)

 

for HFC-134a. Feed refrigerant slowly to prevent

 

freeze-up.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

Perform a leak test at 35 psig (141 kPa).

 

 

 

6.

Open valve 5 fully. Let the vessel pressures equalize.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VALVE

1

 

2

 

3

4

5

6

 

7

8

9

10

11

 

 

CONDITION

 

 

C

 

 

C

 

 

 

 

 

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.

Open valves 9 and 10.

 

 

 

 

 

 

 

 

 

 

 

8.

Open valve 7 to equalize liquid refrigerant levels.

 

9.

Close valves 1, 3, 5, and 6.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VALVE

1

 

2

 

3

4

 

5

 

6

 

7

8

9

10

11

 

 

CONDITION

C

 

C

 

C

C

 

C

 

C

 

C

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.Continue to use the TERMINATE/LOCKOUT function on the LID to turn off water pumps and enable the com- pressor to operate.

GENERAL MAINTENANCE

Refrigerant Properties Ð Refrigerant HFC-134a is the standard refrigerant in the 17EX. At normal atmospheric pressure, HFC-134a boils at −14 F (−25 C) and must, there- fore, be kept in pressurized containers or storage tanks. The refrigerant is practically odorless when mixed with air. This refrigerant is non-combustible at atmospheric pressure. Read the Material Safety Data Sheet (MSDS) and the latest ASHRAE Safety Guide for Mechanical Refrigeration to learn more about safe handling of this refrigerant.

Refrigerant HFC-134a will dissolve oil and some non- metallic materials, dry the skin, and, in heavy concen- trations, may displace enough oxygen to cause asphyxi- ation. When handling this refrigerant, protect the hands and eyes and avoid breathing fumes.

Adding Refrigerant Ð Follow the procedures de- scribed in Charge Refrigerant into Chiller section, page 57.

Use the PUMPDOWN LOCKOUT function on the CON- TROL TEST table to turn on the chiller water pumps and lock out the compressor when transferring refrig- erant. Liquid refrigerant may ¯ash into a gas and cause possible freeze-up when the chiller pressure is below 30 psig (207 kPa) for HFC-134a. If the water pumps are not controlled by the PIC, they must be controlled manually.

Removing Refrigerant Ð When the optional pump- out system is used, the 17EX refrigerant charge may be trans- ferred into the economizer/storage vessel or another storage vessel. Follow procedures in the Pumpout and Refrigerant Transfer Procedures section when removing or transferring refrigerant.

Adjusting the Refrigerant Charge Ð If it is nec- essary to add or remove refrigerant to improve chiller per- formance, follow the procedures under the Trimming Refrigerant Charge section.

Refrigerant Leak Testing Ð Because HFC-134a is above atmospheric pressure at room temperature, leak test- ing can be performed with refrigerant in the chiller. Use an electronic detector, soap bubble solution, or ultra-sonic leak detector. To keep false readings to a minimum, be sure that the room is well ventilated and free from concentration of refrigerant. Before making any necessary repairs to a leak, transfer all refrigerant from the leaking vessel.

Leak Rate Ð The ASHRAE recommendation is that chill- ers should be immediately taken off line and repaired if the refrigerant leak rate for the entire chiller is more than 10% of the operating refrigerant charge per year.

Additionally, Carrier recommends that leaks totalling less than the above rate but more than a rate of 1 lb (0.5 kg) per year should be repaired during annual maintenance or when- ever the refrigerant is pumped over for other service work.

Test After Service, Repair, or Major Leak Ð If all refrigerant has been lost or if the chiller has been opened for service, the chiller or the affected vessels must be pres- sure and leak tested. Refer to the Leak Test Chiller section (page 46) to perform a leak test.

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Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Inspect Water Piping Piping Check Relief Devices Inspect WiringOCCPC01S Input Service Congurations Coupling Maintenance Motor MaintenanceContents Abbreviations Introduction17EX Chiller Familiarization Certified PerformanceTypical 17EX Chiller Components Lubrication Cycle OIL Cooling CycleRefrigeration, Cycle Starters17EX Compressor Lubrication Cycle Denitions ControlsProcessor Sensor Input/Output Module Control Center Temperature Sensors See Fig Pressure TransducersMajor PIC Components Panel Locations PIC Component Panel Location17EX Controls and Sensor Locations PIC LIDPsio GRD Equip GND ÐTewac PROCESSOR/SENSOR INPUT/OUTPUT Module Psio LID Operation and Menus FigGeneral LID Service Screen Override Operations YES or no , on or OFF , etc. to select the desired state17EX LID Menu Structure Default ScreenControl Test Service TableAlarm History Equipment ConfigurationLID CCNCarrier Comfort Network Hgbp Ð Hot Gas BypassHgbp SetpointChwr ChwsMenu Status Select Description Range Units Reference Point Name Alarm HistoryLID Display Data Example 1 Ð STATUS01 Display ScreenExample 3 Ð STATUS03 Display Screen Example 2 Ð STATUS02 Display ScreenMenu Status Example 5 Ð Setpoint Display Screen Example 4 Ð STATUS04 Display ScreenMenu ECW Control Option Example 6 Ð Configuration Config Display ScreenICE Build Termination LAG =2, Standby =3 Example 7 Ð LEAD/LAG Configuration Display ScreenExample 8 Ð SERVICE1 Display Screen Menu Service Example 9 Ð SERVICE2 Display ScreenSpare Alert Enable Example 10 Ð SERVICE3 Display ScreenBearing Temperature Example 11 Ð Maintenance MAINT01 Display ScreenExample 12 Ð Maintenance MAINT02 Display Screen Discharge TemperatureExample 14 Ð Maintenance MAINT04 Display Screen Example 13 Ð Maintenance MAINT03 Display ScreenDescription RANGE/STATUS Units Reference Point Name PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page ECW Cent Capacity ICE Build Setpoint Example of Attach to Network Device Screen Example of Holiday Period Screen To Access the Service ScreensRecycle Sequence Fig START-UP/SHUTDOWNPage Motor Before Initial START-UPJob Data Required Equipment RequiredPage 17EX Leak Test Procedures Temperature C Ð HFC-134a Pressure Ð Temperature FÐ HFC-134a Pressure Ð Temperature C Temperature FDehydration Cold Trap Check Optional Pumpout Compressor Water Pip Inspect Wiring900 500 901 7000 1000 7001-14500 2500 Recommended Motor Fastener Tightening Torques External Gear Pre-Start ChecksExternal Gear Lubrication System Mechanical Starters Check StarterSOLID-STATE Starters Input the Design Set Points Ð To modify the set Set Up Chiller Control CongurationInput the Local Occupied Schedule OCCPC01S Surge Limiting or Change the LID Configuration if NecessaryT1/P1 Full Load Points T2/P2 Increase P1 by Decrease P1 by Load Surge Prevention Occurs TOO Soon Occurs TOO Late50% Tests to be Devices Tested Performed Charge Refrigerant into ChillerInitial START-UP Control Test Menu FunctionsCheck Motor Rotation Dry Run to Test Start-Up SequenceInitial Motor START-UP Page Flange Nut Tightening Torques Low Speed Couplings Only General Recommendations Calibrate Motor Current Demand SettingCheck Oil Pressure and Compressor Stop To Prevent Accidental Start-Up Ð The PIC can beStopping the Chiller Operating InstructionsOperator Duties Starting the ChillerOperating the Optional Pumpout Compressor Pumpout and Refrigerant Transfer ProceduresPlant Chiller Serial No Chiller Model No Refrigerant Type Rear View Valve Condition RLAReturn Chiller to Normal Operating Conditions General MaintenanceChecking Guide Vane Linkage Ð Refer to Fig Contact Seal Maintenance Refer to ÐContact Seal Page Checking Preliminary Alignment Chiller AlignmentMeasuring Angular Misalignment Elevation Alignment Formula HOT Alignment Check Adjusting Angular Misalignment in PlanDoweling Correcting Parallel MisalignmentChanging the Oil Filters Weekly MaintenanceScheduled Maintenance Check Safety and Operating Controls Monthly17EX Chiller Oil Specications Compressor OILPumpout Typical Float Valve Arrangement Sleeve Bearings Page Motor Riggings Inspect the Heat Exchanger Tubes Controls for Optional Pumpout Compressor Troubleshooting GuidePage MAINT04 MAINT01MAINT02 MAINT03PIC 1CR AUXOilpd OiltAutorestart in Progress Starts Limit ExceededFailure to Stop FaultOperation Potential FREEZE-UPRunning Ð Demand Limited Running Ð Temp ControlChiller Protect Limit Faults Autorestart Pending Sensor Fault AlertLOW OIL Pressure AlertDESCRIPTION/MALFUNCTION Probable CAUSE/REMEDY Possible Cause Action External Gear Troubleshooting GuideProblem Possible Cause Ð Item NO.sTemperature Voltage Resistance Drop Ð Thermistor Temperature F vs Resistance/Voltage DropTemperature Voltage Resistance Drop Ð Thermistor Temperature C vs Resistance/Voltage DropInput Options Module Module SwitchControl Modules Module AddressStarter Management Module SMM Fig Processor/Sensor Input/Output Module Psio FigGRD Options Module Installation of NEW Psio ModuleSwitch Setting Options Module Four-In/Two-Out Module Fig4-In/2-Out Module Physical Data and Wiring Schematics100 Additional Cooler WeightsWeight Vessel SIZE² Condenser Total Weight Condenser Charge101 Additional Condenser WeightsCompressor Weight and Elbow Weight Drive Component WeightsÐ Total Motor Weight, SI kg Ð Total Motor Weight, English lb102 103 Marine Waterbox Cover WeightsNIH Waterbox Cover Weights Approximate Refrigerant HCFC-134a ChargeRelief Valve Locations and Data Auxiliary Systems, Electrical Data104 105 Compressor Fits and ClearancesClearance Type Description 106Measure 107 Tabulation Ð Impeller Clearances Open-Drive Compressors17FX 108 Tewac 109Temp Press110 111 112 General 113Terminal Strip 114GND Ð Ground T1-T4Index Index Index Index Index Copyright 1997 Carrier Corporation

17EX specifications

The Carrier 17EX is recognized as an innovative air conditioning solution that combines efficiency with advanced technology. This model is designed to meet the increasing demands of residential and commercial cooling needs while maintaining environmental consciousness.

One of the standout features of the Carrier 17EX is its impressive Seasonal Energy Efficiency Ratio (SEER) rating. With a SEER rating that often exceeds 17, this unit ensures optimized energy consumption, significantly lowering operational costs for users. The incorporation of advanced compressor technology allows the system to adjust its cooling output based on the specific needs of the environment, thus providing both comfort and energy savings.

The Carrier 17EX utilizes a variable-speed inverter-driven compressor that enhances its performance and adaptability. This technology allows the air conditioning unit to operate at different speeds, intelligently adjusting to changing load conditions. As a result, the system runs more efficiently and quietly, providing a more consistent comfort level without the abrupt temperature swings associated with traditional units.

In addition to efficiency, the Carrier 17EX also prioritizes reliability and durability. The unit comes with a robust cabinet that protects the components from weather elements, ensuring longevity and consistent performance. The innovative design integrates a corrosion-resistant finish and robust insulation, which further enhances the unit's resilience in various environmental conditions.

For users concerned about indoor air quality, the Carrier 17EX includes advanced filtration systems designed to capture allergens and airborne particles. This feature is particularly beneficial for individuals with respiratory issues, ensuring that the air circulated within the space is clean and healthy.

Moreover, the Carrier 17EX is equipped with smart technology capabilities, allowing users to control their systems remotely through smartphones or other smart devices. This connectivity not only provides convenience but also empowers homeowners to optimize their energy use by adjusting settings on the fly, ensuring efficient operation even when they are away from home.

Overall, the Carrier 17EX stands out in the marketplace for its exceptional energy efficiency, advanced technology, and commitment to providing reliable and effective cooling solutions. Its combination of modern features makes it a preferred choice for those looking to enhance comfort while being mindful of energy consumption and environmental impact.
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