HyperStat Split CPU+ Economizer Sequence of Operations

| Description of Equipment

HyperStat Split is the best-in-class thermostat that can measure parameters in the zone and controls equipment at zone and system levels (RTUs & FCUs) by connecting seamlessly over two wires reducing the cost of additional cabling.

HyperLite sits and monitors Air quality (with up to 8 onboard sensors) inside a zone and is equipped with a 2.8" TFT screen paired with mechanical buttons and a touch slider for taking user inputs and displaying zone data.

Connect Module sits inside the RTU/FCU, does stage or modular controls, and can accept up to 8 Universal analog inputs.

The HyperStat Split Conventional Package Unit (CPU) + Economizer is a standalone profile, that provides both heating and cooling equipment controls for conditioning.

The CPU + Economizer allows the choice between fully modulating and staged equipment control.

| Schematics

| Control System Object List

Note: For a comprehensive list of tuners and their details refer to Tuners Complete List.

| Sequence of Operation

The sequence of operation is completely driven based on Occupancy mode,  Space Current Temperature, the set Cooling and Heating Desired Temperatures, Outside Air Temperature levels, Space CO2 levels, and Mixed Air Temperature levels. 

Let us understand the Sequence of operations based on the occupancy modes, and how the other factors contribute to the sequence of operations during different types of occupancy modes.

| Occupancy Modes

The occupancy mode (Occupied or Unoccupied) shall be determined through a user-adjustable, graphical, seven-day schedule with a holiday schedule, alongside the configurable autoaway and forced occupied options (external schedule influencers) for optimized controls and enhanced energy savings.

Based on the above aspects factoring into the occupancy the following can be the possible applicable occupancy modes:

• Pre- Conditioning
• Occupied
• Unoccupied
• Auto-Away
• Forced Occupied

| Sequence of Operation During Pre-Conditioning

Warm-up:

• If the space temperature is below the occupied heating temperature setpoint, the pre-conditioning shall initiate the morning warm-up via HeatingLoopOutput
• Where, the dcvLoopOutput, EconomizingLoopOutput, OutsideAirLoopOutput is disabled

Pre-cooling:

• Suppose the space temperature is above the occupied space cooling temperature setpoint,  the pre-conditioning shall initiate the morning pre-cooling via CoolingLoopOutput
• Where the dcvLoopOutput is disabled.
• The EconomizingLoopOutput, OutsideAirLoopOutput is enabled for use if conditions are favorable as per the information in the quick summary table above for economization.

| Sequence of Operation During Occupied

At all occupied times: (based on a set schedule)

• The device maintains a space temperature within the Heating Desired Temperature and Cooling Desired Temperature Range.

During Deadband:

• A minimum fan speed is maintained, and the minimum fan analog voltages are set to 2V (customizable) for linear fans, and a recirculation fan speed voltage for staged fans.

During Heating:

• When the space current temperature falls below the Heating Desired Temperature the HeatingLoopOutput is enabled. based on the difference in the space current temperature and heating desired temperature.
• The FanLoopOutput is enabled based on HeatingLoopOutput (FanLoopOutput= HeatingLoopOuptut* analogFanSpeedMultiplier(1))
• When the space CO2 level is above the CO2 threshold set, the dcvLoopOutput is enabled if conditions are favorable as per the information in the quick summary table above for demand control ventilation.
• The EconomizingLoop Output is disabled.

During Cooling:

• When the space current temperature is above the Cooling Desired Temperature the CoolingLoopOutput is enabled, based on the difference in the space current temperature and cooling desired temperature.
• The FanLoopOutput is enabled based on CoolingLoopOutput (FanLoopOutput= CoolingLoopOuptut* analogFanSpeedMultiplier(1))
• When the space CO2 level is above the CO2 threshold set, the dcvLoopOutput is enabled if conditions are favorable as per the information in the quick summary table above for demand control ventilation.
• The EconomizingLoopOutput, OutsideAirLoopOutput is enabled for use if conditions are favorable according to the information in the quick summary table above for economization. Also, out of DCV and Economization loops whichever is higher takes precedence in the OAO damper position calculation. 

Humidifier:

• The humidifier shall modulate to maintain a return air humidity setpoint of 45% (adjustable), subject to the duct's high limit setpoint of 90% (adjustable). Humidification shall be locked out whenever the fan is de-energized or the duct humidity exceeds the high limit setpoint.

| Sequence of Operation During AutoAway

• The range of Heating Desired Temperature and Cooling Desired Temperature drifts further away.
• The device maintains a space temperature within the newly set Heating Desired Temperature and Cooling Desired Temperature Range.

During Deadband:

• FanLoopOutput, HeatingLoopOutput, & CoolingLoopOutput, are disabled

During Heating:

• When the space current temperature falls below the heating autoaway setback temperature, the HeatingLoopOutput is enabled. based on the difference in the space's current temperature and the heating autoaway setback temperature.
• The FanLoopOutput is enabled based on HeatingLoopOutput (FanLoopOutput= HeatingLoopOuptut* analogFanSpeedMultiplier(1))

During Cooling:

• When the space current is above the cooling autoaway setback temperature, the CoolingLoopOutput is enabled. based on the difference in the space's current temperature and the cooling autoaway setback temperature
• The FanLoopOutput is enabled based on CoolingLoopOutput (FanLoopOutput=CoolingLoopOuptut* analogFanSpeedMultiplier(1))

| Sequence of Operation During UnOccupied

• The range of Heating Desired Temperature and Cooling Desired Temperature drifts further away.
• The device maintains a space temperature within the newly set Heating Desired Temperature and Cooling Desired Temperature Range.

During Deadband:

• FanLoopOutput, HeatingLoopOutput, & CoolingLoopOutput, are disabled

During Heating:

• When the space current temperature falls below the heating unoccupied setback temperature, the HeatingLoopOutput is enabled. based on the difference in the space's current temperature and the heating unoccupied setback temperature.
• The FanLoopOutput is enabled based on HeatingLoopOutput (FanLoopOutput= HeatingLoopOuptut* analogFanSpeedMultiplier(1))
• The dcvLoopOutput, EconomizingLoopOutput, OutsideAirLoopOutput is disabled

During Cooling:

• When the space current temperature is above the cooling unoccupied setback temperature, the CoolingLoopOutput is enabled. based on the difference in the space's current temperature and the cooling unoccupied setback temperature.
• The FanLoopOutput is enabled based on CoolingLoopOutput (FanLoopOutput=CoolingLoopOuptut* analogFanSpeedMultiplier(1))
• The dcvLoopOutput is disabled
• The EconomizingLoopOutput, OutsideAirLoopOutput is enabled for use if conditions are favorable as per the information in the quick summary table above for economization.

| Sequence of Operation During Forced Occupied

• The device maintains a space temperature within the Heating Desired Temperature and Cooling Desired Temperature Range.

During Deadband:

• A minimum FanLoopOutput is enabled regardless of no conditioning.

During Heating:

• When the space current temperature falls below the Heating Desired Temperature the HeatingLoopOutput is enabled. based on the difference in the space current temperature and heating desired temperature.
• The FanLoopOutput is enabled based on HeatingLoopOutput (FanLoopOutput= HeatingLoopOuptut* analogFanSpeedMultiplier(1))
• When the space CO2 level is above the CO2 threshold set, the dcvLoopOutput is enabled if conditions are favorable as per the information in the quick summary table above for demand control ventilation.
• The EconomizingLoopOutput is disabled.

During Cooling:

• When the space current temperature is above the Cooling Desired Temperature the CoolingLoopOutput is enabled, based on the difference in the space current temperature and cooling desired temperature.
• The FanLoopOutput is enabled based on CoolingLoopOutput (FanLoopOutput= CoolingLoopOuptut* analogFanSpeedMultiplier(1))
• When the space CO2 level is above the CO2 threshold set, the dcvLoopOutput is enabled if conditions are favorable as per the information in the quick summary table above for demand control ventilation.
• The EconomizingLoopOutput, OutsideAirLoopOutput is enabled for use if conditions are favorable as per the information in the quick summary table above for economization.

| Sequence of Operation During Emergency Conditioning

when building limits are violated, and the recorded temperature is within the building limit plus leeway the conditioning will happen in the direction of zone load.

| Sequence of Operation During Temp Dead

And, When the Building temperature breaches the building limits, beyond the leeway limits all the following loops are disabled:

• CoolingLoopOutput
• HeatingLoopOutput
• FanLoopOutput
• dcvLoopOutput
• EconomizingLoopuOutput
• OutsideAirLoopOutput

| Humidifier Control

The humidifier is turned ON whenever the humidity level for the system drops below the targetMinInsideHumidty set. The humidifier will be turned OFF after being turned on when the humidity levels go humidityHysteresis above the targetMinInsideHumidty. Humidity control will not be maintained during UNOCCUPIED or VACATION modes.

| DeHumidifier Control

If the dehumidifier is selected, it turns ON whenever the humidity level for the system goes above the targetMaxInsideHumidty set. The dehumidifier will be turned OFF after being turned on when the humidity drops humidityHysteresis below the targetMaxInsideHumidty. Dehumidifier control will not be maintained during UNOCCUPIED or VACATION modes.

Note: The humidity level for the system is either the average level reported by all the zones serviced by the RTU/AHU.

| Control Mode Summary