CPC MultiFlex PAK, User Manual

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42 • MultiFlex I/O Board Operator’s Guide 026-1712 Rev 3 03-JAN-2008
Amb Spray Lkout. The Ambient Spray Lock-
out setpoint is the ambient air temperature below
which the condenser spray output will be locked
OFF.
Rtn2Nrml and Off Delay. The Return To Nor-
mal setpoint is the cut-off pressure for the con-
denser spray. When the pressure falls below this
setpoint and remains there for an amount of time
equal to the Off Delay, the condenser spray out-
put will turn OFF.
Screen 6
Fan Max Volts. The Fan Max Volts is the volt-
age of the analog output that corresponds to the
maximum VS fan speed.
Fan Min ON Volts. The Fan Min ON Volts is
the voltage of the analog output that corresponds
to the minimum fan speed when the VS fan is
ON.
Fan Min ON Pct. The VS Min ON Pct is the
minimum percentage at which the VS fan will
operate when ON. When switched ON, the VS
fan will begin operating at this percentage.
Screen 7
Volts/Minute Increase. The VS Increase Volts-
per-Minute Rate is the rate, in volts per minute,
that the analog output controlling the VS fan will
increase when a higher fan speed is being called
for.
Volts/Minute Decrease. The VS Decrease
Volts-per-Minute Rate is the rate, in volts per
minute, that the analog output controlling the VS
fan will decrease when a lower fan speed is
being called for.
Screen 8
VSD Fault Active Level. The VSD Fault
Active Level is the input state on the VSD Fault
input that indicates a VS fault. Typically, a VS
fault causes an OPEN input state. If the VS
inverter closes the fault input on failure, change
the value of this field to ON.
VSD Max Output Quiet Mode. This setpoint
sets the maximum VS fan speed when the PAK
is operating in Quiet Mode.
Screen 9
Screen 9 sets the operating parameters for
the Fan Sequencer output.
The All Off field shown in this screen is
read-only and is fixed at 0V. This signifies 0V
will be the Fan Sequencer output voltage when
all fans are called to be OFF.
The 1st On field shown in this screen is also
read-only and is equal to the value of Fan
MinON Volts in Screen 6. The voltage shown in
this field will be the Fan Sequencer output volt-
age when stage 1 is called to be ON.
After the first fan stage is ON, the PAK will
increase the voltage of the Fan Sequencer output
by a fixed amount every time a new fan stage is
to be activated. Enter the fixed voltage in the
Step Volts field.
Analog Fan Setup
Max Volts: 10.0
MinOnVolts: 2.0
Min On Pct: 20.0
VSD Fan Setup
Volts/MinuteRate
Increase: 10.0
Decrease: 10.0
VSD Fault Input
ActiveLevel: OFF
VSD Max Output
QuietMode: 100
Fan Seq Setup
Step Volts: 1.5
All Off 0 Volts
1st On 2.0 Volts