Form CP-MAPS-D12 with FX05, P/N 209341 Rev 4, Page 5
Occupied Mode
Blower operation is continuous in occupied mode. The FX05 contact BO-1 will
close providing power for the outside air damper to open. The 2-position damper
is electrically interlocked with the blower circuit. When the damper actuator
opens to 80%, the blower is allowed to run. If power is lost, the mechanical
spring will drive the damper closed.
If the unit is equipped with return air dampers, the blower control relay is not
interlocked with the dampers.
Unoccupied Mode
The blower cycles ON/OFF with a call for either heating or cooling from the
space sensor. Once the space heating or cooling unoccupied setpoints are
satised, the blower will continue to run for 60 seconds then shut OFF.
During the Unoccupied Cycle the space setpoints will increase as follows:
Space Cooling Setpoint (SSP) = (SSP +SCP + nSu) = 75°F + 1.8 + 9°F =
85.8°F
Space Heating Setpoint = (SSP - HSo - SHP - nSb) = 75°F - 5°F - 1.8 - 9°F
= 59.2°F
(nSu and nSb default value = 9°F, adjustable from 0-35°F )
Unoccupied Override Mode
If the space override button on the CL53 wall-mounted control (point BI-1)
is pushed during an unoccupied period, the air handling unit will operate in
occupied mode for a period of four hours. (UOT = 240 minutes adjustable 0-
800 minutes) If the override button is pushed again in unoccupied mode, the
unit goes into temporary boost mode which changes the space temperature
setpoints.
Heating and
Cooling Control
Modes
The unit operates based upon four Discharge Air Temperature Setpoints.
1. Standard (Neutral) Heating Discharge Air Setpoint
2. Space Heating Discharge Air Setpoint
3. Standard (Neutral) Cooling Discharge Air Setpoint
4. Space Cooling Discharge Air Setpoint
With the space sensor installed, the unit will operate to maintain the space
heating and cooling setpoints as required. When the space temperature sen-
sor is satised (or not installed), the unit will operate to maintain the stan-
dard (neutral) discharge air setpoint. The space cooling setpoint (SSP) default
value is 75ºF. The space heating setpoint is a given differential (HSo) below the
space cooling setpoint. The differential (Hso) can be adjusted from 1-30ºF. The
default value of 5ºF makes the default heating setpoint 70ºF.
Temporary Set Up Boost Mode with Wall-Mount Sensor, Option CL53
(Push button down for 1 second) - If the setpoint override button is pushed
during an occupied period (or a unit without the time clock card option), unit will
control to space setpoint as follows:
Cooling Setpoint = SSP - 3ºF
Heating Setpoint = SSP - HSO + 4ºF
The unit will default back to programmed setpoints after a minimum 10 minute
interval and the setpoint is satised. The controller ignores additional pushes
of the button until the space is satised and the unit is no longer in boost mode.
The unit will remain in this mode until the space setpoint is satised.
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