•The Simplicity Control will monitor the supply air temperature and compare it to the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT”. If the supply air temperature is 0.1° F or more below this value and the compressor minimum run time requirement has been met the Simplicity Control will turn off the compressor.
•The Simplicity Control then starts a
•If after 10 minutes the supply air temperature is equal to or greater than the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT” plus 5.1° F the Simplicity Control will turn the compressor back on provided there is still a demand for the staged off compressor.
•If after 10 minutes the supply air temperature is not less than the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT” plus 5.1° F Simplic- ity Control will keep the compressor off until the supply air temperature is equal to or greater than the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT” plus 5.1° F. The Simplicity Control will then turn the compressor back on provided there is still a demand for the staged off compres- sor.
If multiple compressors are energized the control will monitor the supply air temperature and respond as follows:
•The Simplicity Control will monitor the supply air temperature and compare it to the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT”. If the supply air temperature is 0.1° F or more below this value and the compressor minimum run time requirement has been met the Simplicity Control will turn off the compressor with the shortest run time.
•The Simplicity Control starts a 10 minute and 3 minute timing sequence.
•If after 3 minutes, the supply air temperature is still 0.1° F below the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT” the control will turn off the next compressor with the shortest run time.
FORM
•The Simplicity Control will continue to turn off compressors every 3 minutes until the sup- ply air temperature is equal to or greater than the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT”.
•If after 10 minutes the supply air temperature is equal to or greater than the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT” plus 5.1° F the Simplicity Control will turn the staged off compressor(s) back on provided there is still a demand for the use of the staged off compres- sor.
•If after 10 minutes the supply air temperature is not less than the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT” plus 5.1° F the Simplic- ity Control will keep the compressor(s) off until the supply air temperature is equal to or greater than the “SUPPLY AIR TEMP LIMIT COOLING SETPOINT” plus 5.1° F. The Simplicity Control will then turn the compressor(s) back on provided there is still a demand for the staged off compres- sor.
Heating
The following System Parameters must be
programmed:5
“SUPPLY AIR TEMP LIMIT FOR HEATING ENABLED”- must be enabled using Parameter 16 under the PROGRAM key on the Simplicity control board or under the HEATING SETUP tab in the Simplicity PC software package.
“SUPPLY AIR TEMP LIMIT HEATING SETPOINT”
–Using Parameter 17 under the PROGRAM key on the Simplicity control board or under the HEATING SETUP tab in the Simplicity PC software package.
If a single heat stage is on the control will monitor the supply air temperature and respond as follows:
•The Simplicity Control will monitor the supply air temperature and compare it to the “SUPPLY AIR TEMP LIMIT HEATING SETPOINT”. If the supply air temperature is 0.1° F or more above this value and the heat stage minimum run time has been met the Simplicity Control will turn off the heat stage.
JOHNSON CONTROLS | 83 |
