Table of Contents
Advertisement
090.040-O (MAR 12)
Page 136
SETUP FOR AUTOMATIC CONTROL
In order to operate a compressor at peak effi -
ciency, under full load and part load conditions
complex control sequences must be used. In or-
der to obtain the effi ciencies, Automatic Control
is almost mandatory. Automatic control of the
Slide Stop and Slide Valve increases the com-
pressor effi ciency over a wide operating range.
The following steps (which are relevant) should
be taken to control in Automatic:
•
The compressor should be in automatic (au-
tomatic cycling) so the compressor will start
and stop according to the Autocycle set-
points.
•
The Oil Pump should be in auto because its
operation coincides with that of the com-
pressor.
•
The Slide Valve and the Slide Stop should
be in Automatic so they are controlled by
setpoints and internal control logic.
Note: If there is a shutdown in response to a
safety setting, a compressor in Automatic mode
is placed into Manual mode requiring operator
intervention.
REMOTE CONTROL OF THE COMPRESSOR
The following digital outputs and inputs (on Digi-
tal Board 2) have been provided that can be used
to control the compressor from another control-
ler such as a PLC:
•
(Module 1) - Ready to Run - This out-
put is energized while the compressor
is not shutdown and the Recycle Delay
has timed out.
•
(Module 2) - Remote Enabled - This
output is energized while the compres-
sor is in Remote Start mode.
•
(Module 3) - Remote Start / Run /
Stop - If the compressor is in Remote
Start mode with no Recycle Delay time
and this input is energized, the com-
pressor is started. If this input is ener-
gized and the compressor is started, it
will continue to run. If this input is de-
energized, the compressor is stopped.
•
(Module 4) - Remote Load or Remote
C.C step 1 for step units
•
Remote Load - If the Slide Valve
is in Remote Mode and this input
is energized, the Slide Valve load
solenoid will be energized provided
there are no safety overrides pre-
QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
venting loading.
•
Remote C.C step 1 for step units
- If the Capacity Mode is in Remote
this input is used to step on and off
capacity according to the Remote
Capacity Control chart.
•
(Module 5) - Remote Unload or Re-
mote C.C step 2 for step units
•
Remote Unload - If the Slide Valve
is in remote and this input is ener-
gized, the Slide Valve unload sole-
noid will be energized.
•
Remote C.C step 2 for step units
- If the Capacity Mode is in Remote
this input is used to step on and off
capacity according to the Remote
Capacity Control chart.
Remote Capacity Control Chart
Input \ %Capacity
3-Step Input 4
3-Step Input 5
4-Step Input 4
4-Step Input 5
•
(Module 6) Recycle Delay (If compres-
sor is off) - This output is energized
while the remaining time in minutes for
Recycle Delay is greater than zero (0).
Recycle delay time is the time that must
elapse prior to allowing the compressor
to restart. This timer times out while
the compressor is running or stopped
since the Recycle Delay is a start-to-
start protection. It is intended to pre-
vent damage to the motor from succes-
sive restarts. For further setup see the
Motor Control Setpoints screen
•
Sequence Input (If compressor is on)
– Reports the status of Stop Load or
Force Unload (See Slide Valve and Slide
Stop Status box for further details).
The Hot Gas Bypass option can be used. This option
is not available for all compressor models (Reference
090.040-M; Compressor Model Differences).
The Remote Control Setpoint option can be used.
This option, which is enabled in Panel Setup, is not
available for all compressor models (Reference Com-
pressor Model Differences). This uses the Remote
Control Setpoint analog input and the Remote Control
Setpoint analog output for Capacity Control of com-
pressors. For further setup see the Calibrate Remote
Control Setpoint screen and the [Remote Setpoint]
command key from the Slide Valve Mode screen
25
50
75
100
OFF OFF
ON
OFF
ON
ON
OFF
ON
OFF
ON
OFF
OFF ON
ON
Advertisement
Table of Contents
