•“CV UNOCCUPIED HEATING SETPOINT”
– using Parameter 13 under the PROGRAM key on the Simplicity control board or under the HEATING SETUP tab in the Simplicity PC software package.
•“SPACE SENSOR FAULT OVERIDE EN- ABLED” must be turned on – using Parameter 8 under the PROGRAM key on the Simplicity control board or under the SYSTEM OPTIONS tab in the Simplicity PC software package.
Cooling Operation – Occupied or Unoccupied
The Simplicity Control will stage on the cooling as follows:
•At cooling start up
–If the return air temperature is between 1.5° F and 1.9° F above the “CV OCCUPIED COOLING SETPOINT” or “CV UNOCCU- PIED COOLING SETPOINT” the control will turn on the first compressor from System 1 and turn on a 5 minute timer.
–If after 5 minutes the return air temperature is between 1.5° F and 1.9° F above the “CV OCCUPIED COOLING SETPOINT” or “CV
UNOCCUPIED COOLING SETPOINT” the control will bring on the second compressor of System 1 and start a
OR
–If the return air temperature is greater than 2.0° F or more above the “CV OCCUPIED COOLING SETPOINT” or “CV UNOCCU- PIED COOLING SETPOINT” the control will bring on the first compressor from System 1 and start a 3 minute timer. After 30 seconds, the control will bring on the second compres- sor from System 1.
•If after 3 or 5 minutes the return air temperature is between 1.5° F and 1.9° F above the “CV OCCUPIED COOLING SETPOINT” or “CV UNOCCUPIED COOLING SETPOINT” the control will bring on the first compressor from System 2 and start a 5 minute timer.
•If after 3 or 5 minutes the return air temperature is 2.0° F or more above the “CV OCCUPIED COOLING SETPOINT” or “CV UNOCCUPIED COOLING SETPOINT” the control will bring on the first compressor of System 2 and start a 3 minute timer.
FORM
•If after 3 or 5 minutes the return air temperature is 1.5° F or more above the “CV OCCUPIED COOLING SETPOINT” or “CV UNOCCUPIED COOLING SETPOINT” the control will bring on the second compressor of System 2.
The Simplicity Control will stage off the cooling as follows:
•If the return air temperature is within 0.5° F of the “CV OCCUPIED COOLING SETPOINT” or “CV UNOCCUPIED COOLING SETPOINT” the control turns off the System 2 compressors, if on, with a 30 second delay between the com- pressors provided the minimum compressor run times have been satisfied.
•If the return air temperature is equal to or below the “CV OCCUPIED COOLING SETPOINT” or “CV UNOCCUPIED COOLING SETPOINT” the control turns off the System 1 compressors with a 30 second delay between the compressors provided the minimum compressor run times have been satisfied.
The Simplicity Control has the following timing cooling functions:
• | Minimum off time of 5 minutes. |
| |
• | Minimum on time of 3 minutes – This param- |
| |
5 | |||
| eter can be programmed from between 1 and 10 |
minutes using the COOLING SETUP tab of the in the Simplicity PC software package.
Heating Operation – Occupied or Unoccupied
The Simplicity Control will stage on the heat as follows:
•When the return air temperature is 1.5° F – 1.9° F below the “CV OCCUPIED HEATING” or
“CV UNOCCUPIED HEATING SETPOINT” the control energizes the first stage of heat.
•When the return air temperature is 2.0° F – 2.4° F below the “CV OCCUPIED HEATING” or
“CV UNOCCUPIED HEATING SETPOINT” the control energizes the second stage of heat.
•When the return air temperature is 2.5° F or more below the “CV OCCUPIED HEATING” or “CV UNOCCUPIED HEATING SETPOINT” the control energizes the third stage of heat.
JOHNSON CONTROLS | 67 |
