Taylor-Wharton KRYOS Controller - Manual (Page 24)

22
KRYOS
either the Freeze-Guard sensor detects that the valve is not fully closed. The special
“Freeze-Guard” sensor assembly includes a plumbing “T” with an in-line thermistor
which is placed in the plumbing directly downstream from the solenoid valve.
KRYOS monitors the “Freeze-Guard” thermistor and detects if the flow of LN
2
is
stopped when the valve has been commanded to close.
Valve Monitoring
If KRYOS detects that a flow of LN
2
is occurring even when the solenoid valve is
supposedly closed, an error message will appear on the screen indicating “Valve
Stuck Open.” To confirm, the control waits for 10 seconds after it determines that the
valve should be closed before it will indicate that the valve is stuck open.
Valve Open Duration
Valve Open Duration can be accessed through the menu system ( MENU, 6, 2, 4, 1).
This allows the user to set the maximum amount of time, which the valve will stay
open at any one time. If a fill operation exceeds the valve open duration time set by
the user, the valve closes for 15 seconds and then opens again for another cycle.
This 15 second rest period allows the solenoid valve to warm. The allowable settings
are Disabled and 1-15 minutes.
Valve De-Icing
Valve De-Icing can be accessed through the menu system ( MENU, 6, 2, 4, 2). This
feature can be turned on or off. If enabled, the control will try to free up the valve by
rapidly turning it on and off. This feature is triggered when the Freeze-Guard sensor
detects a stuck valve condition. KRYOS will attempt to free up the valve by De-icing
5 times with a two-minute delay between tries.
Splash-Guard
Splash Guard is a process to reduce or eliminate false signals detected by the
thermistor sensor assembly. In particular this reduces sporadic valve operation when
the sensor assembly is splashed with LN
2
. When a fill operation has completed
because the level has reached the STOP FILL sensor, the display will flash “Check”
and the control will check the validity of the signals received from the sensor
assembly. The splash-guard check occurs for 20 seconds and the bottom line of the
display indicates this by flashing “Check”.
Display Brightness
DISPLAY BRIGHTNESS can be set through the menu system of the control
(
MENU, 6, 3). This option changes the intensity of the display. The possible choices
are 25%, 50%, 75% and 100%.
About this Control
ABOUT THIS CONTROL can be accessed in the menu system ( MENU, 6, 4). This
option provides information about the control. In particular it tells the serial number
of the control and the software version that the control is running.
Control On Battery Back-up Version
This controller is similar to the 24 VAC KRYOS controller. The menu system and all
features are identical. The only operational difference is if a power failure occurs,
the control goes into battery back-up mode. The control can also operate on battery
power to provide up to 72 hours of continuous service without AC power. The system
22
KRYOS
either the Freeze-Guard sensor detects that the valve is not fully closed. The special
“Freeze-Guard” sensor assembly includes a plumbing “T” with an in-line thermistor
which is placed in the plumbing directly downstream from the solenoid valve.
KRYOS monitors the “Freeze-Guard” thermistor and detects if the flow of LN
2
is
stopped when the valve has been commanded to close.
Valve Monitoring
If KRYOS detects that a flow of LN
2
is occurring even when the solenoid valve is
supposedly closed, an error message will appear on the screen indicating “Valve
Stuck Open.” To confirm, the control waits for 10 seconds after it determines that the
valve should be closed before it will indicate that the valve is stuck open.
Valve Open Duration
Valve Open Duration can be accessed through the menu system ( MENU, 6, 2, 4, 1).
This allows the user to set the maximum amount of time, which the valve will stay
open at any one time. If a fill operation exceeds the valve open duration time set by
the user, the valve closes for 15 seconds and then opens again for another cycle.
This 15 second rest period allows the solenoid valve to warm. The allowable settings
are Disabled and 1-15 minutes.
Valve De-Icing
Valve De-Icing can be accessed through the menu system ( MENU, 6, 2, 4, 2). This
feature can be turned on or off. If enabled, the control will try to free up the valve by
rapidly turning it on and off. This feature is triggered when the Freeze-Guard sensor
detects a stuck valve condition. KRYOS will attempt to free up the valve by De-icing
5 times with a two-minute delay between tries.
Splash-Guard
Splash Guard is a process to reduce or eliminate false signals detected by the
thermistor sensor assembly. In particular this reduces sporadic valve operation when
the sensor assembly is splashed with LN
2
. When a fill operation has completed
because the level has reached the STOP FILL sensor, the display will flash “Check”
and the control will check the validity of the signals received from the sensor
assembly. The splash-guard check occurs for 20 seconds and the bottom line of the
display indicates this by flashing “Check”.
Display Brightness
DISPLAY BRIGHTNESS can be set through the menu system of the control
(
MENU, 6, 3). This option changes the intensity of the display. The possible choices
are 25%, 50%, 75% and 100%.
About this Control
ABOUT THIS CONTROL can be accessed in the menu system ( MENU, 6, 4). This
option provides information about the control. In particular it tells the serial number
of the control and the software version that the control is running.
Control On Battery Back-up Version
This controller is similar to the 24 VAC KRYOS controller. The menu system and all
features are identical. The only operational difference is if a power failure occurs,
the control goes into battery back-up mode. The control can also operate on battery
power to provide up to 72 hours of continuous service without AC power. The system
22
KRYOS
either the Freeze-Guard sensor detects that the valve is not fully closed. The special
“Freeze-Guard” sensor assembly includes a plumbing “T” with an in-line thermistor
which is placed in the plumbing directly downstream from the solenoid valve.
KRYOS monitors the “Freeze-Guard” thermistor and detects if the flow of LN
2
is
stopped when the valve has been commanded to close.
Valve Monitoring
If KRYOS detects that a flow of LN
2
is occurring even when the solenoid valve is
supposedly closed, an error message will appear on the screen indicating “Valve
Stuck Open.” To confirm, the control waits for 10 seconds after it determines that the
valve should be closed before it will indicate that the valve is stuck open.
Valve Open Duration
Valve Open Duration can be accessed through the menu system ( MENU, 6, 2, 4, 1).
This allows the user to set the maximum amount of time, which the valve will stay
open at any one time. If a fill operation exceeds the valve open duration time set by
the user, the valve closes for 15 seconds and then opens again for another cycle.
This 15 second rest period allows the solenoid valve to warm. The allowable settings
are Disabled and 1-15 minutes.
Valve De-Icing
Valve De-Icing can be accessed through the menu system ( MENU, 6, 2, 4, 2). This
feature can be turned on or off. If enabled, the control will try to free up the valve by
rapidly turning it on and off. This feature is triggered when the Freeze-Guard sensor
detects a stuck valve condition. KRYOS will attempt to free up the valve by De-icing
5 times with a two-minute delay between tries.
Splash-Guard
Splash Guard is a process to reduce or eliminate false signals detected by the
thermistor sensor assembly. In particular this reduces sporadic valve operation when
the sensor assembly is splashed with LN
2
. When a fill operation has completed
because the level has reached the STOP FILL sensor, the display will flash “Check”
and the control will check the validity of the signals received from the sensor
assembly. The splash-guard check occurs for 20 seconds and the bottom line of the
display indicates this by flashing “Check”.
Display Brightness
DISPLAY BRIGHTNESS can be set through the menu system of the control
(
MENU, 6, 3). This option changes the intensity of the display. The possible choices
are 25%, 50%, 75% and 100%.
About this Control
ABOUT THIS CONTROL can be accessed in the menu system ( MENU, 6, 4). This
option provides information about the control. In particular it tells the serial number
of the control and the software version that the control is running.
Control On Battery Back-up Version
This controller is similar to the 24 VAC KRYOS controller. The menu system and all
features are identical. The only operational difference is if a power failure occurs,
the control goes into battery back-up mode. The control can also operate on battery
power to provide up to 72 hours of continuous service without AC power. The system