Issue:
Non Condensibles
Resolution:
Pueblo Air Cooled and Water Cooled Chillers
Process for determining if a refrigerant circuit has non-condensibles:
- Close off the liquid line valve(s) and initiate a service pumpdown
- If pump down is unavailable, transfer refrigerant using appropriate equipment to the condenser
- Ensure the pumps are running and water flow has been established and is maintained throughout this process
- If you must do a pump down manually, monitor the suction pressure (gauge) and disable energy to the compressor(s) when the suction pressure reads 25 psig
- With the majority of the refrigerant now in the condenser, manually run the fans on air-cooled units for about 35-40 minutes. On water-cooled units, run water through the condenser barrel for about the same amount of time
- For Air Cooled equipment, this equates to the air temperature entering the condenser coil being the same as leaving the condenser coil. For Water Cooled equipment, this equates to the water temperature entering and leaving the condenser is the same
- Measure the pressure (PSIG) in the condenser and use the appropriate Pressure-Temperature Chart to convert to temperature
- If the the P & T values match, the circuit does not have non-condensibles
- If the converted measurement is higher than the value determined by the Pressure-Temperature Chart, suspect non-condensibles or wrong refrigerant type
- Follow proper procedures to recover the refrigerant, properly vac the circuit, and add new refrigerant per the chiller nameplate
Notes:
Changes:
Other Question/Problem/Cause Statements:
- How Do I check for non condensibles?
Facts:
- Pueblo Air Cooled and Pueblo Water cooled products
- Air-Cooled Chiller - Intellipak (CGAB)
- Air-Cooled Chiller - Intellipak (CGAC)
- Air-Cooled Chiller - Intellipak (CGAF)
- Air-Cooled Chiller (CGA, 10-15 Ton)
- Air-Cooled Chiller (CGAA)
- Air-Cooled Chiller (PBL) (CGAD, CGAE)
- Air-Cooled Chiller (Pueblo) (RTAA 130-400 Ton)
- Air-Cooled Chiller (Pueblo) (RTAA 70-125 Ton)
- Air-Cooled Chiller (Pueblo) (RTAC)
- Air-Cooled Condenser (Pueblo) (RTCA)
- Compressor Chiller (Pueblo) (CCAF)
- Compressor Chiller (Pueblo) (RTUA)
- Water-Cooled Chiller (PBL) (CGWA, CGWB, CGWC)
- Water-Cooled Chiller (PBL) (CGWD, CGWE)
- Water-Cooled Chiller (Pueblo) (CGWF)
- Water-Cooled Chiller (Pueblo) (RTHA)
- Water-Cooled Chiller (Pueblo) (RTHB)
- Water-Cooled Chiller (Pueblo) (RTHC)
- Water-Cooled Chiller (Pueblo) (RTHD)
- Water-Cooled Chiller (Pueblo) (RTWA)
- Water-Cooled Chiller (Pueblo) (RTWD)
- Air-Cooled Chiller (Charmes) (RTAA)
- Air-Cooled Chiller (Charmes) (RTAC)
- Air-Cooled Chiller (Pueblo) (CGAM 20-130 Ton)
- Compressor Chiller (Pueblo) (RTUD 70-200 Ton)
Document Identifier: DOC-98551
Document Identifier: 98551
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.