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CNT-SVX17G-EN 59

Sequence of Operations

Active Minimum Flow Setpoint Selection Arbitration

The controller selects the active minimum flow setpoint based on the occupancy mode,

the use of reheat, and the control mode. Table 38 shows the minimum ai

rflow setpoints.

Ventilation reset may raise the active minimum flow setpoint when ventilation reset is

being performed at the system level. Table 39 shows space temperature control modes

and

minimum ventilation requirements.

Table 38.Minimum airflow setpoints

Setpoint name Rover field label Location in Rover

Cooling minimum Minimum airflow Configuration setup tab

Heating minimum Minimum heating airflow Configuration setup tab

Unit heating minimum Minimum local heating airflow Configuration setup tab

Cooling standby minimum Standby minimum airflow Configuration setup tab

Heating standby minimum Standby heating minimum air flow Configuration setup tab

Pressure dependent mode minimum Minimum position setpoint Configuration setup tab

Ventilation minimum airflow setpoint Active minimum flow setpoint

Ventilation tab

Note: Reported active minimum flow setpoint = Reported effective ventilation setpoint ÷ Communicated ventilation ratio limit.

Table 39.Space temperature control modes and minimum ventilation requirement

Mode Minimum ventilation requirement

Use active minimum flow

setpoint

Occupied heat Enforced Yes

Standby heat Enforced Yes

Occupied cool Enforced Yes

Standby cool Enforced Yes

Off or stop No minimum ventilation requirement No

Construction Maximum heating airflow No

Unoccupied heat No minimum ventilation requirement Yes

Unoccupied cool No minimum ventilation requirement Yes

Morning warm-up No minimum ventilation requirement Yes, occupied minimum

Pre-cool No minimum ventilation requirement Yes, occupied minimum

Night purge No minimum ventilation requirement Yes, occupied minimum

Maximum heat Maximum heating airflow No

Note: Ventilation flow control and flow tracking have no minimum ventilation requirements. Flow tracking does not use the active minimum

airflow setpoint.

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