FORM
SECTION 5 – SEQUENCE OF OPERATION
UNIT TYPE
The Simplicity Control is capable of being configured for either Constant Volume (CV) or Variable Air Volume (VAV) operation. To configure the unit for VAV operation a 10,000 to 20,000 ohm resister must be installed on the P7 (CV/VAV) connector on the control board. If no resister is installed the unit is configured for CV operation. The control board should already be configured from the factory based on the type of unit that was ordered. However, this item should be verified at the time of start up. This feature will also need to be configured if a replacement control board is installed.
OCCUPIED / UNOCCUPIED MODE
The unit can be placed in the occupied or unoccupied mode by four different methods.
•Digital Input
•Internal Schedule – The Simplicity Control can be programmed for a weekly schedule that al- lows two occupied and two unoccupied times for each day. The control can also be configured for up to 20 Holiday schedules. The start date, time, and number of days can be programmed in for each holiday. The weekly schedule can be programmed using the WEEKLY SCHEDULE SETTINGS tab in the Simplicity PC software package. The holiday schedule can be pro- grammed using the HOLIDAY SCHEDULE tab in the Simplicity PC software package. In order to use this feature “OCCUPIED INPUT ENABLED” must be disabled using Parameter 71 under the PROGRAM key on the Simplicity control board or under the SYSTEMS OPTIONS tab in the Simplicity PC software package.
•An “Occupancy Command” can be entered into the Simplicity Control using the Modbus com- munication feature. In order to use this feature “OCCUPIED INPUT ENABLED” must be en- abled using Parameter 71 under the PROGRAM key on the Simplicity control board or under the SYSTEMS OPTIONS tab in the Simplicity PC software package.
•Space Sensor with Unoccupied Override Button
– If the Override Button is pushed on the space sensor the control will switch to the Occupied mode until the Unoccupied Override Time has expired. The Unoccupied Override Time can be set between 0 and 240 minutes. The “UNOCCU- PIED OVERRIDE TIME” can be programmed by selecting Parameter 9 using the Simplicity control board PROGRAM key or by using the SYSTEMS OPTION tab in the Simplicity PC software package.
CONSTANT VOLUME MODE (CV) |
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A Constant Volume (CV) unit can be controlled by four |
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methods: |
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• | Stage thermostat | 5 |
• | Communicated Space Temperature |
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• | Hardwired Space Temperature |
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• | Stand Alone |
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The control is
As long as the Simplicity Control is receiving a space temperature input from the BAS system, it will use the communicated value instead of a hard wired space temperature input.
The following parameters must be programmed to allow cooling and/or heating operation:
JOHNSON CONTROLS | 63 |