Issue:
Hot Start Control
Resolution:
CGWD, CGWE, CGAD, CGAE, CCAD, CCAE chillers with the Cyclone Control.
Hot Start Control:
- If a chiller is started when both the evaporator and condenser are hot, the potential exists to trip the high pressure cutout and/or to overload the compressors, resulting in a nuisance lock-out.
- In addition, when the evaporator is hot and the condenser is cool, the unit may trip the low pressure cutout.
- To avoid these problems, the operation of the second compressor of the same circuit is inhibited when the leaving water temperature is above 71 degrees F.
- When the leaving water temperature drops to 66 degrees F, the second compressor is allowed to start.
Notes:
Changes:
Other Question/Problem/Cause Statements:
- Hot Start Control?
- Chiller running A21 and there is a bar/line by the Internal Limit indicator?
- Hot Start?
-
Internal Limit?
- Evaporator Limit
- Hot Start
- Low Ambient Start
Facts:
- Air-Cooled Chiller (PBL) (CGAD, CGAE)
- Compressor Chiller (PBL) (CCAD, CCAE)
- Water-Cooled Chiller (PBL) (CGWD, CGWE)
Document Identifier: DOC-87277
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.