QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
090.040-O (MAR 12)
Page 81
DRIVE CONTROL
[Maximum Drive Output]
- This setpoint
represents the maximum signal to the drive
from the Quantum™ HD, where 100% would
represent 3600 rpm on a 3600 rpm – 60 hz
motor. Selectable from 1-100% of the 4-20
mA signal. Minimum speed is conditional
based on oil, refrigerant, etc. Be certain that
the Minimum Drive Output is properly iden-
ti
fi
ed.
[Minimum Drive Output]
- This setpoint
represents the minimum signal to the drive
from the Quantum™ HD, where 20% would
represent 720 rpm on a 3600 rpm – 60 hz
motor. Selectable from 1-100% of the 4-20
mA signal.
Calculated Minimum Drive Output
Capacity Slide To Speed Transition
– The
fi
rst setpoint in the Capacity Control section
[95%] is the slide valve position at which the
speed will be allowed to increase to main-
tain the capacity control setpoint. It also
represents the slide valve position of which
the speed will increase proportionally to the
value of the second setpoint [50%] from
the Minimum Output setpoint. If the second
setpoint, also known as the Speed to Ca-
pacity Slide Proportion setpoint was set at
[50%] the speed would increase proportion-
ally from the Minimum Drive Output setpoint
[20%] to [50%] as the slide valve loads from
0% to 95%. In this case, that would be an in-
crease of approximately 1% speed to every
3% slide valve.
Speed To Capacity Slide Proportion
- The
speed at which the Slide Valve will load.
VFD Minimum Capacity Slide Position
-
(100% Maximum Drive Output - Minimum
Drive Output %)/2. For example:
Maximum Drive Output is 100%, Mini-
mum Drive Output is 20%, then the
Minimum Slide Valve Output would be
40%:
(100-20)/2 -40
NOTE:
The Absolute Minimum RPM is
720.
Recycle Delay Control
- Set this to disabled
if you do not want to utilize the Recycle De-
lay feature. Enable it to use it.
• Disabled
• Enabled
REMOTE SPEED CONTROL
Provided For backward compatibility to old-
er control systems if necessary. Preferred
method of control is by the Quantum HD.
•
[Rate of Increase]
- The rate of
speed increase over the duration
of the Delay setpoint when either
a serial load command is received
or a digital load signal is received.
•
[Rate of Decrease]
- The rate of
speed decrease over the duration
of the Delay setpoint when either
a serial unload command is re-
ceived or a digital unload signal is
received. This also sets the rate at
which the panel will cause a Force
Unload for high or low pressure
and separator velocity. For Force
Unloading the Rate Of Decrease
is two times the value of the set-
point.
SKIP FREQUENCY BANDS
Skip Frequency Bands
- These setpoints
provide the ability to lockout 5 frequency
bands where abnormal noise may occur due
to the resonance of various components
throughout the speed range. The slide valve
needs to be at 100% when the speed range
is run through to detect these bands. The
limit is 5% from bottom to the top of each
band lockout.
During drive ramp up, these bands will be
skipped.
De
fi
ned frequency SKIP areas
