Flow Status; Saf Speed Control - Daikin MicroTech III Operation Manuals

Flow Status

Table 5: Flow Status Menu
Item Display Name
Airflow=
Waterflow=
Water Pump=
Supply Fan=
Airflow is a status only item that indicates whether or not
discharge airflow is detected. Airflow status is sensed by a
binary input delivered to the controller by a differential pressure
switch (PC7) . On VAV units duct static pressure is also a factor
in the indication of airflow.
Waterflow is a status only item that indicates whether or not
water flow is detected on a water cooled unit. Water flow status
is sensed by a binary input delivered to the controller by an
optional water flow sensor (WF1) or from a network supplied
water flow input.
Water pump is a status only item that indicates whether or
not the Pump Start Output is active on a water cooled unit .
The pump start output is available for field use to start a field

SAF Speed Control

Table 6: Supply Fan Speed Menu
Item Display Name
SAF Speed=
Speed Cmd=
Duct Press=
DuctSP Spt=
IAQ PPM =
OA Flow =
Bldg Press =
BldgSP Spt
SAF Speed is a status only item that indicates the current
supply fan speed .
Speed Cmd is a status only item that indicates the current
supply fan VFD commanded speed .
Duct Press is a status only item which indicates the current
pressure of the supply air ductwork . The duct pressure is
measured at the location in which the duct static pressure tap
was field installed. This device is not factory installed.
DuctSP SPT is an adjustable item which sets the duct static
pressure set point used for controlling the VFD for the supply
air fan . The VFD is modulated to maintain the duct pressure at
this value .
IAQ PPM = is a status only item that indicates the current CO
level when the supply fan control method is set to CO
Note: CO option only available on 100% OA units that have
2
the unit control type set to Zone or DAC .
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Default Setting
—
—
—
supplied pump when water flow is required. For field wiring
requirements for using this output refer to "Field Wiring" in the
MicroTech III Installation Manual (IM 919) . The Pump Start
Output is turned on whenever the economizer bypass valve
is open, the unit is in the Econo or Cooling operating state,
economizer flush mode is active or a Freeze fault or Freeze
problem alarm is active or has been active within the past 10
minutes . Otherwise the Pump Start Output is off .
Supply Fan is a status only item which indicates whether or
not the controller is commanding the unit supply fan on .
Ret/Exh Fan is a status only item which indicates whether or
not the controller is commanding the unit RF/EF fan on .
Default Setting
—
—
—
1 .0 in
OA Flow = is a status only item that indicates the current CFM
value when the supply fan control method is set to CFM . Note:
CFM option only available on 100% OA units that have the unit
control type set to Zone or DAC .
Bldg Press = is a status only item which indicates the current
building static pressure when the supply fan control method is
set to BSP . Note: BSP option only available on 100% OA units
that have the unit control type set to Zone or DAC .
BldgSP Spt is an adjustable item which sets the building
static pressure set point used for controlling the VFD when the
supply fan control method is set to BSP . Note: BSP option only
available on 100% OA units that have the unit control type set
to Zone or DAC .
2
.
2
27
Range
NoFlow
Flow
NoFlow
Flow
Off
On
Off
On
Range
0–100%
0–100%
0 .0–5 .0 in
0 .2–4 .0 in
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Password Level
6
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6
Password Level
6
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