Pump out operation - Johnson Controls - LIT-12011950 - Building automation software - Smart Equipment Controller - 5.0

Smart Equipment Controls Sequence of Operation Technical Bulletin

Brand
Johnson Controls
Product name
Smart Equipment Controller
Document type
Technical Bulletin
Document number
LIT-12011950
Version
5.0
Revision date
2024-06-06
Product status
Active
Language
English

Parameters

The parameter is pump out enabled set to on.

Operation

With split system heat pumps, pump out enable should never be turned on.

See the thermostat or sensor sections in Constant volume sequences if pump out is turned off.

If pump out is turned on, when the C1 output energizes, the condenser fan (CN-Fan) energizes when either the low pressure switch 1 (LPS1) opens or 5 minutes elapse.

If C1 is energized, and the accumulated C1 runtime is greater than 1 hour more than C2 accumulated runtime, C2 energizes for 5 minutes.

If C2 is energized, and the accumulated C2 runtime is greater than 1 hour more than the C1 accumulated runtime, C1 energizes for 5 minutes.