Specifications

Control Valves - SMARTLINK
®
MRV
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combustion systems for industry
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Table 13: SMARTLINK
®
MRV User Commands - Command Set ‘B’ (continued)
SMARTLINK
®
Commands
Number: Name
Description of command purpose and usage
Command Set ‘B’
B-4: Select Startup Configuration
Command B-4 permits selection of the Startup Configuration setting. The Startup Configuration setting defines what effect each
startup command input has on SMARTLINK
®
MRV operation. The 3 startup commands include the Purge Position Command
(PPC), Light-off Position Command (LPC), and Standby Position Command (SPC). The SPC command is active when both the
PPC and LPC command inputs are not energized. All startup commands are overridden by the Modulate Valves command
(MVC) which puts the MRV in RUN mode. The two configuration options are defined as follows:
Default Startup (Setting #0): PPC = maximum position for all valves, index #9; LPC = minimum position for all valves, index #0;
SPC = minimum position, index #0. For this configuration setting, adjustment of the minimum position (Index #0) and maximum
position (Index #9) will automatically change the purge (Index #10), light-off (Index #10.5), and standby (Index #9.5) positions.
Custom Startup (Setting #1): For each valve, the user can define a position for each of the startup commands (PPC, LPC, SPC).
This configuration setting enables Command B-1 (Set Purge Position), Command B-2 (Set Standby Position), and Command B-
5 (Set Light-Off Position) and enables (or disables) custom startup positions for standby, purge, and light-off states during the
burner startup sequence controlled by the user's burner management system.
After Command B-4 is entered, the current configuration is shown by one of the numbered lights. Select Startup Configuration #0
(Default Startup) or #1 (Custom Startup), using the INC/DEC switch and push the Enter button after the desired configuration is
selected and indicated by the numbered lights. The factory default Startup Configuration is setting #0, Default Startup.
B-5: Set Light-Off Position
Command B-5 is used to set a custom light-off position that is independent of the minimum position required for low fire burner
operation. In most applications, this command is not required because the minimum position established for each valve at low
fire is also acceptable for burner light-off positions. (If this command is not used, light-off positions will be set to the same values
as stored for position index #0.)
After successfully entering Command B-5, both the yellow manual light and green run light on the Control Interface will be flash-
ing along with numbered lights 9 and 1. Adjustment of the light-off positions and the requirements for entering the command are
identical to Command B-1, Set Purge Positions, described above.
B-6: Select Auto Ramp Adjust On/
Off
Command B-6 is a configuration command that is used to set on or off the automatic ramp function. The factory default is Auto
Ramp ON, configuration #1. Configuration #0 is Auto Ramp OFF.
After command entry, the current configuration is shown by one of the numbered lights. Select Auto Ramp ON, #1, or Auto Ramp
OFF, #0 using the INC/DEC switch and push the Enter button after the desired configuration is selected and indicated by the
numbered light.
The automatic ramp function is used during the Position Setup Mode to create a linear position ramp between the position being
adjusted and the two adjacent position indexes. This provides a position "smoothing" of the valve profile and simplifies commis-
sioning because only 10 position indexes (i.e. index 0, 1, 2, 3, ….instead of 0, 0.5, 1.0, 1.5, etc.) require adjustment. For burner
tuning that requires precision adjustment of each of the 19 position indexes, the Auto Ramp function should be OFF.
B-7: Select Movement
Configuration
Command B-7 is a configuration command that is used to select valve movement speed during RUN mode when modulating
from low to high fire. Configuration setting #0 is the slow speed (~60 seconds), setting #1 the medium speed (~40 seconds), and
setting #2 is the fast speed (~20 seconds). Configuration setting #1, medium speed, is the default configuration.
After command entry, the current configuration is shown by one of the numbered lights. Select the movement configuration (#0,
#1, or #2) using the INC/DEC switch and push the Enter button after the desired configuration is selected and indicated by the
numbered lights.