IOM 1207-6 • TRAILBLAZER
®
MODEL AGZ CHILLERS 44 www.DaikinApplied.com
out into the system is a popular recommendation) although
physically re-positioning the sensor at commissioning stage
can be a costly exercise. With Sensorless pump control it is
possible to replicate the moving of a sensor by adjusting the
head setting ‘Hmin’.
BAS Control
The pump speed will be controlled according to the voltage
level from a BAS input signal. The pump control protocol is
the same as ordered from the chiller unit. BAS inputs may be:
BACnet
®
MS/TP, LONWORKS
®
or Modbus.
NOTE: BACnet
®
Ethernet/IP is currently unavailable.
Remote Sensor Control
The VFD is wired to pressure dierential switch(s) mounted
in the chilled water piping system. This is the standard VFD
control when a sensorless VFD is not used.
Locally Selected Constant Speed Control
This mode is selected by pressing the Hand On key. Operation
of the pump at a constant speed as selected on the VFD
control panel. This mode allows selecting a pump speed to
match the system curve.
Further details on the pump package VFD controller operation,
alarms, and BAS integration can be found beginning on page
115.
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