FRICK QUANTUM CONTROL PANEL
OPERATION
S90-010 O
Page 35
The “Condenser Control” screen is shown if a type of “Con-
denser Control” was selected in Panel Setup. Only the set-
points of the selected Condenser Control will show. Sequence
setpoints are based on the system Discharge Pressure, ana-
log channel 11. An additional pressure sensor for system
discharge is required. The discharge level the condensers
are operating on has its own pressure to maintain. The con-
trol system maintains Discharge Pressure by sequencing
the condenser devices. Digital control is used to turn on and
off the condenser digital outputs. Analog control is used to
vary the analog signal of the condenser analog output.
This setpoint is required for both Digital and Analog Control:
Condenser Control Setpoint - This is used to control
the sequencing on and off of the condenser digital out-
puts and/or the signal strength of the condenser ana-
log output.
A Digital Control data box is shown if digital control is se-
lected. The status of the condenser outputs is shown:
• On - This output is energized.
• Off - This output is de-energized.
• Disabled - A zero (0) has been entered for the sequence
order which disables this output from being turned on.
The digital control settings on this screen are useful for
sequencing condenser fans and pumps. The following set
points are required:
Upper Dead Band - A Discharge Pressure band above
the Condenser Control setpoint at which the condenser
digital outputs will neither be turned on or turned off.
Lower Dead Band - A Discharge Pressure band below
the Condenser Control setpoint at which the condenser
digital outputs will neither be turned on or turned off.
Upper Delay - The minimum time in seconds that the
system Discharge Pressure must be at or above the
Condenser Control setpoint plus the upper dead band
before an output is turned on. This timer is used to
allow the system to respond to the change in the amount
of condensing. If the pressure falls below this pressure
for any reason at any time, the start time delay will be
reset to start counting again if needed.
Lower Delay - The minimum time in seconds that the
system Discharge Pressure must be at or below the
Condenser Control setpoint minus the lower dead band
before an output is turned off. This timer is used to allow
the system to respond to the change in the amount of
condensing. If the pressure rises above this pressure
for any reason at any time, the start time delay will be
reset to start counting again if needed.
Sequence Order - A numerical number will indicate
the order in which the condenser output is turned on.
Sequencing starts from 1 and goes up in numerical
order. Stopping of condenser devices is in reverse or-
der of the starting. The number zero (0) should be en-
tered to disable that device from being sequenced on.
A condenser output that is given a zero (0) will be im-
mediately turned off. The following condenser outputs
require a setpoint for a sequence position:
• Condenser Output #1
• Condenser Output #2
• Condenser Output #3
• Condenser Output #4 - If digital control is selected
and analog control is not selected, this output can
be sequenced using the digital control setpoints.
When analog control is selected, this output is as-
sociated with it.
An Analog Control data box is shown if analog control is
selected. The status of condenser output #4 is shown in the
analog data box along with the relative percent value of the
analog output signal.
The following analog control settings are required:
Upper Dead Band - A Discharge Pressure band above
the Condenser Control setpoint at which the condenser
analog output signal will neither be increased or de-
creased.
Lower Dead Band - A Discharge Pressure band be-
low the Condenser Control setpoint at which the con-
denser analog output signal will neither be increased
or decreased.
Response Time - A response time of 1 to 20 refers to
the relative time in seconds it takes to raise the analog
signal to its maximum output if the system Discharge
Pressure is greater than or equal to the Condenser
Control setpoint plus the analog control upper dead
band. The response time is also used as the relative
time in seconds it takes to lower the analog signal to its
minimum output if the system Discharge Pressure is
less than or equal to the Condenser Control setpoint
minus the analog control lower dead band. A response
time of 1 is the slowest and 20 is the fastest.
A toggle key is provided that changes when the condenser
control is active:
[Condenser Active Always] - Selects the Condenser
Control to be active always even when the compressor
is not running.
[Condenser Active Running] - Selects the Condenser
Control to be active only when the compressor is run-
ning.
[Not Active] - Selects the Condenser Control to be
currently not active.
Digital Condenser Control
The following is a description of the Condenser Control
logic when only digital condenser control is enabled.
If the system discharge pressure is above the condenser
control setpoint the following is repeated until all condenser
outputs are turned on:
1. If the system Discharge Pressure continues to rise and
is greater than or equal to the Condenser Control set-
point plus the digital control upper dead band, then the
next condenser output is turned on. When a condenser
output is turned on, the upper delay time is used to set
a timer that must time out before the next condenser
output will be turned on.
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