Issue:
Motor Terminal Condensation
Resolution:
The condition of condensation on motor terminal insulators is normal for screw chillers and each unit has been designed to take this into account.
Because of their exposure to suction refrigerant temperatures, condensation will appear on the motor terminals whenever the suction temperature falls below the dew point temperature. In applications where the relative humidity is elevated, droplets of water will form on the insulators, and may even begin to "rain" from them. RTAA chillers are designed such that openings in the compressor terminal box will allow the water to run out If the condensation is a concern to the customer, a varnish such as Glyptal or a suitable insulation may be used on the terminals. Future maintenance considerations should be taken in to account when selecting a compound as it may be difficult to clean off, and may cause a poor connection if the leads are removed and later re-secured.
See RTAA-SVB17B-EN for reference on insulation that may be used on terminals.
Notes:
Changes:
Other Question/Problem/Cause Statements:
- Motor Terminal Condensation
- Motor Sweating?
- Condensation on Motor Terminals
- Moisture on Motor Terminals
- Motor Terminal Moisture
Facts:
- Air-Cooled Chiller (Pueblo) (RTAA 130-400 Ton)
- Air-Cooled Chiller (Pueblo) (RTAA 70-125 Ton)
- Air-Cooled Chiller (Pueblo) (RTAC)
- Compressor Chiller (Pueblo) (RTUA)
- Water-Cooled Chiller (Pueblo) (RTHC)
- Water-Cooled Chiller (Pueblo) (RTWA)
- Water-Cooled Chiller (Pueblo) (RTHA)
- Water-Cooled Chiller (Pueblo) (RTHB)
- Water-Cooled Chiller (Pueblo) (RTHD)
- Compressor Chiller (Pueblo) (RTUD 70-200 Ton)
- Water-Cooled Chiller (Pueblo) (RTWD)
Document Identifier: DOC-73908
Document Identifier: 73908
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.