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VAV COOLING ONLY CONSTANT SERIES SPEED FAN
TEMPERATURE CONTROL
When the zone temperature is greater than the cooling temperature setpoint, the controller will enter
the cooling mode. The primary airflow rate will be varied between its
maximum Flowrate setpoint
temperature setpoint. Once the zone temperature falls below the cooling temperature setpoint, it will
exit the cooling mode.
When the zone temperature is between the cooling and heating temperature setpoints, it will be in
Deadband or Vent Mode. The controller will maintain the
When the zone temperature falls below the heating setpoint, the controller will enter the heating mode
and the primary airflow rate will maintain the
rises above the heating temperature setpoint, it will exit heating mode.
DAMPER CONTROL
Before the series fan is enabled, the damper will close for 60 seconds to prevent the box fan from
running backwards.
SERIES SINGLE SPEED FAN
The fan (DO 13) will operate continuously whenever the unit is in the occupied state, or if there is a
request for heating or cooling. The fan control matrix is as follows:
MODE
Occupied
Unoccupied
Warm-up
Standby
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maxCoolFlowStpt (A228)
as required to maintain the zone at the cooling
minCoolFlowStpt (A227).
COOLING
On
On
N/A
On
FBVI-2U4-4T Contr
FBVi-2U4-4T |
minCoolFlowStpt (A227),
minCoolFlowStpt (A227).
Once the zone temperature
DEADBAND
On
Off
On
On
and its
HEATING
On
On
On
On
60
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