Problems with fan staging and head pressure control
RTAA 130-400 Ton Chillers:
-
In late 1999, we released a change so that 70-125 ton units would keep at least one fan running for 2.5 minutes after a hot start regardless of the differential pressure. In early 1998, we released a change so that 130-400 ton units would start fans based on the ambient air temperature at first compressor start on a circuit.
Notes
- If FANS appear to not stage fast enough; compressor staging needs to be looked at closely.
Additional details
Resource Available
- Reference Literature: (Electronic copies can be pulled from e-library at Trane Residential)
- Other: RTAA-SB-21
Other Question/Problem/Cause Statements:
- Problems with fan staging and head pressure control.
- Fan staging?
- Head Pressure Control?
- Fans don't stage fast enough?
Facts
- RTAA 130-400 Ton (Pueblo)
- Air-Cooled Chiller (Pueblo) (RTAA 130-400 Ton)
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.