Product Info
The 30GT080-420 Flotronic™ liquid chillers are equipped with electronic controls and factory-installed options (FIOPs). The chillers have electronic expansion valves (EXV) as standard, with conventional thermostatic expansion valves (TXV) and liquid line solenoid valves as options on 30GT080-110 units only.
Preventive Maintenance Schedule
Every 6 Months:
- Clean condenser coils
- Check operation of safety devices
Daily:
- Check oil level in compressor sight glass
- Verify electrical power source agrees with unit nameplate
Monthly:
- Check tightness of all electrical connections
- Verify crankcase heaters are energized for at least 24 hours prior to start-up
Every 8000 Hours:
- Replace filter drier if moisture-liquid indicator shows presence of moisture
Parts List
- Compressor: Reciprocating, semi-hermetic compressors (Part Number: Not Available)
- Condenser Coil: Vertical and horizontal, plate fin, enhanced tubing (Part Number: Not Available)
- Cooler: Direct expansion, shell and tube (Part Number: Not Available)
- Electronic Expansion Valve (EXV): Microprocessor-controlled valve to control refrigerant flow (Part Number: Not Available)
- Thermostatic Expansion Valve (TXV): Factory-installed option on 30GT080-110 units only (Part Number: Not Available)
- Liquid Line Solenoid Valve: Prevents liquid refrigerant migration to low side during off cycle (Part Number: Not Available)
- Liquid Line Service Valve: Allows pumping down of refrigerant circuit for servicing (Part Number: Not Available)
- Filter Drier: Removes moisture and contaminants from refrigerant (Part Number: Not Available)
- Thermistors: Sensors used by microprocessor control to monitor temperatures (Part Number: Not Available)
- Crankcase Heaters: Prevents absorption of liquid refrigerant by oil when compressor is off (Part Number: Not Available)
- Cooler Heaters: Protects cooler from freezing in low ambient conditions (Part Number: Not Available)
- Compressor Protection Control System (CPCS): Provides protection for compressors and crankcase heaters (Part Number: Not Available)
- High Pressure Switch: Protects compressors from high discharge pressure (Part Number: Not Available)
- Loss-of-Charge Switch: Protects against total loss of refrigerant charge (Part Number: Not Available)
- Low Oil Pressure Switch: Protects compressors from low oil pressure (Part Number: Not Available)
- Pressure Relief Valves: Protect refrigerant circuits from excessive pressure (Part Number: Not Available)
Product Specs Sheet
- Refrigerant: R-22
- Compressors: Reciprocating, semi-hermetic
- Condenser Coils: Vertical and horizontal, plate fin, enhanced tubing
- Cooler: Direct expansion, shell and tube
- Refrigerant Circuits: 2 circuits
- Refrigerant Charge: See Tables 2A-3B in the manual
- Operating Weight: See Tables 2A-3B in the manual
- Fluid Connections: Victaulic type
- Maximum Working Pressure: Refrigerant side: 450 psig (3103 kPa), Fluid side: 300 psig (2068 kPa)
- Temperature Limits: See Table 11 in the manual
Troubleshooting
- Refrigerant leak:
- Use standard refrigeration practices to search for and repair the leak
- After repairing leaks, evacuate and dehydrate the system
- Faulty electronic expansion valve (EXV):
- Check EXV wiring and connections
- Check resistance of EXV motor windings
- Check thermistors controlling the EXV
- Check operation of the EXV by cycling it open and closed
- Tripped compressor circuit breaker:
- Determine and correct the cause of the overload before resetting the breaker
- Do not bypass or increase the size of the breaker
- Low oil pressure:
- Check the low oil pressure switch
- Replace the compressor if the low oil pressure condition cannot be corrected
- Cooler freeze-up:
- Ensure the cooler heaters and insulation are properly installed and functioning
- Use an inhibited ethylene glycol or other suitable antifreeze solution in the chilled liquid circuit
Please
note that any procedure, checklist, or other document available on Limble is provided for general education and
information only and does not constitute legal, medical, or financial advice. Limble makes the materials available
AS IS and AS PROVIDED, without warranties of any kind. By downloading or using any such materials, you assume the
risk that they may not be appropriate for your specific situation and agree that you are solely responsible for any
such use, including compliance with applicable law and with meeting any conditions of product warranties. It is
recommended to contact OEM for the most accurate information.
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