Daikin MicroTech III Operation Manuals page 39

RF/EF Ctrl is an adjustable parameter used to select how the
return/exhaust fans are to be controlled . The exhaust fans
can be controlled by the building pressure or by a percentage
of return/exhaust air fan speed from 5% to 100% . The speed
option is typically used with a building automation system .
Remote RAF Cap is an adjustable item for setting the return
fan speed by the keypad or by a network control signal .
Remote ExhF Cap is an adjustable item for setting the exhaust
fan speed by the keypad or by a network control signal .
BSP DB is an adjustable item which sets a dead band around
the BldgSP Spt parameter . No building static pressure control
action is taken when the current building static pressure input
is within this dead band .
BSP Period is an adjustable item which sets the ding stat
periodadjustable item which sets the ding static pressure
return air or exhaust fan speed .
BSP Gain is an adjustable item which sets the ding static in
the PI control function that modulates the return air or exhaust
fan speed .
Max Spd Chg is an adjustable item that sets the maximum
value for a exhaust speed increase or decrease . This speed
change (either a positive or negative value) is added to the
current fan speed whenever the building static pressure is
outside of the deadband, and the BSP Period= time has
passed since the previous speed change .
Sup Fan Max is an adjustable item used to set the supply
fan maximum speed when the RF/EF control method is set
to tracking .
RF @ SF Max is an adjustable setting used to set the return fan
speed when the supply fan is operating at its maximum speed .
Sup Fan Min is an adjustable item used to set the supply fan
minimum speed when the RF/EF control method is set to tracking
RF @ SF Min is an adjustable setting used to set the return fan
speed when the supply fan is operating at its minimum speed .
Lo Fan Diff is an adjustable setting used to set the differential
value between supply fan speed and return fan speed . The
return fan will not modulate below the current supply fan speed
minus the low fan differential .
Hi Fan Diff is an adjustable setting used to set the differential
value between supply fan speed and return fan speed . The
return fan will not modulate above the current supply fan speed
plus the low fan differential .
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RFEF Ctrl Delay is an adjustable item that sets the duration
of time that the minimum speed signal is sent to the variable
speed supply air fan after the return fan is started via a
digital output . Control reverts to either building pressure
or speed after the fan has been on for the BSPCtrlDelay
(default 30 seconds) .
Min Speed is an adjustable item the sets the minimum of the
RF/EF fan
MinExStopTime is an adjustable item that sets the Minimum
Exhaust Fan Stop Time (Default = 120 seconds) . Once
stopped, the exhaust fan must remain off for a minimum of this
time before it can be re-started .
MinExhOAPos is an adjustable item that sets the Minimum
Exhaust OA Position (default 5%) . The outdoor air dampers
must be open more that this value for prop exhaust fan
operation .
MinExhSAFCap is an adjustable item that sets the Minimum
Exhaust SAF capacity (default 10%) . The supply air fan speed
must be higher than this value for prop exhaust fan operation .
Exh On OA Pos is an adjustable item that turns on the exhaust
fan when the OA damper position reaches this setting .
Exh Mx OA Pos is an adjustable item that sets the OA damper
position at which the exhaust fan will be at is maximum speed .
Exh Stage 1,2,3 On is an adjustable setting that sets the
damper positions at which point the staged exhaust fans are
turned ON .
Exh stage 1,2,3 Off is an adjustable setting that sets the
damper positions at which point the staged exhaust fans are
turned OFF .
Max RF/EF Hz is an adjustable item that sets the maximum
return/exhaust fan value . The maximum value settings must
also be changed in the VFD's to match this setting .
MaxVentSpd is an adjustable item that sets the exhaust
fan speed when an external ventilation override input to the
exhaust fan is present .
Max RFEF RPM is an adjustable item that sets the maximum
RPM value for the exhaust air fan . Note: This is set based on
the exhaust fan model size .
ECM Status is a status only item that indicates the current
status of the return/exhaust fan motor
39 OM 920-6 • MICROTECH UNIT CONTROLLER
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