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System Control - ACVMax: 660Y2800 • B
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CONFIGURATION OF CASCADE SYSTEMS  SOLO 2 PUMPS
Cascade Menu / Cascade Settings (also refer to “Cascade system connection (4-boiler Cascade)” on page 50)
Cascade Settings
?
The Cascade Settings menu contains settings related to cascade operation. Each line contains
a Cascade Setting followed by its current value. Six Cascade Settings are displayed on the screen
at one time.
Press the UP or DOWN buttons to scroll through additional Cascade Settings.
Cascade Setting changes must be made on the cascade Master. Cascade autode-
tection must be performed after making any changes to a cascade Setting before
the change will take eect.
Cascade Setting
Stage Delay 60 sec
Minimum Firing Rate 25%
Max. Firing Rate 250 kW
CH / DHW Boilers 0
Auto Rotation Enabled
CH Prop. Gain 7
Stage Delay
60 sec.
0 sec. 255 sec.
Stage Delay sets the time delay before enabling or disabling a boiler in the Cascade System.
The Stage Delay begins once the Master boiler determines that a boiler must be enabled to
reach the setpoint or when the Master boiler determines a boiler should be disabled because
of a decreasing load.
Press the LEFT or RIGHT buttons to adjust the time then press the OK button to store the setting.
Adjusting the Stage Delay will have the following eects:
Increasing Stage delay
- Reaching the setpoint could take longer due to a longer delay between enabling boilers.
- Overshooting the setpoint could occur due to boilers staying on longer before being disabled.
Decrease Stage delay
- Overshooting the setpoint could occur due to boilers being enabled quicker.
- Boilers will be disabled quicker, possibly increasing boiler cycling and decreasing runtimes.
Cascade Setting
Stage Delay 60 sec
Minimum Firing Rate 25%
Max. Firing Rate 250 kW
CH / DHW Boilers 0
Auto Rotation Enabled
CH Prop. Gain 7
Minimum Firing Rate
25 %
0 % 100 %
Minimum Firing Rate is the minimum ring rate of a single boiler in the Cascade System. The
Master boiler uses this setting to determine when boilers can be enabled and disabled.
Setting the Minimum Firing Rate below the recommended minimum will result in boilers being
enabled too quickly which may cause sharp increases in temperature from the Cascade System.
Setting the Minimum Firing Rate above the recommended minimum will delay the enabling of
boilers which may lower the system eciency.
Press the LEFT or RIGHT buttons to adjust the Minimum Firing Rate then press the OK button
to store the setting.
Default : 25%
Only make changes after being instructed to do so by ACV as changing of this
value may cause instability in the appliance cascade control.
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