Honeywell SV2 Series User Manual page 101

NOTE: If this factor is not entered, the SV2 Series valve will not allow a start-up of the burner.
Once the burner is fired, the initial amplification factor can be fine-tuned by pressing the up and down arrow and Set
Initial buttons as shown in
NOTE: A change of 0.01 in amplification factor corresponds roughly to 0.1% in CO2.
Adding Points to Create the Base Curve (Addition button)
The Base Curve must contain a minimum of 4 points; a point for minimum and maximum load and two intermediate
points. It is, however, advisable to use as many points needed, up to a quantity of 25, to obtain the desired excess air
level over the modulation range of the system.
NOTE: The Base Curve needs to be built starting with the Minimum point.
To set the Minimum load point, run the appliance at minimum load and set the amplification factor for this load by
selecting Start Point Commissioning and changing the amplification factor with the arrow keys until the excess air level
has stabilized at the right level. Select the Set Min button to store the amplification factor for this point.
Increase the appliance load and repeat this process for maximum and intermediate loads. The Set Max button records
the maximum load point while the Add Generic button records any intermediate load points.
The commissioning of any point can be interrupted by selecting the Stop Point Commissioning button.
Deleting Points on the Base Curve (Deletion button)
Single points can be deleted by picking the desired point in the selection box and pushing the Delete single button. The
selected point will turn red in the graph and is identified by the X-axis value and the point number counting from left to
right.
After deleting the minimum or maximum point, the system will generate a warning. A new value for the minimum and
or maximum needs to be defined to be able to run the system in normal operation mode (Not Installer or OEM mode).
All points of the curve can be deleted at once by selecting Delete all button. The amplification setting will default back
to the earlier entered initial amplification curve. To be able to run the system in normal operation mode, a minimum of 4
points need to be defined (Minimum, Maximum and two intermediate points).
Correction Curve Setup
Refer to Fig. 57. The Correction Curve is used to correct/calibrate the amplification settings (excess air levels) of the Base
Curve for variations in the valve measuring module (FARMOD) and mixing unit's measuring points for use with a specific valve,
application/burner, installation and even the location. Before being able to commission the Correction Curve, the Base Curve
needs to be fully commissioned or uploaded to the system.
The Correction Curve might typically be created and/or adjusted in the field.
NOTE: The valve must be powered for 1 hour in order for the embedded FARMOD heater to effectively warm up the device.
If the full hour is not provided, the programmed lambda and the excess air values might vary from the desired
values.
The Correction Curve can have up to 25 burner load-specific points, with an enforced minimum of 4 points. The 4 minimal
points would consist of a point at minimum load, maximum load and 2 points equally distributed between minimum and
maximum load. It is strongly recommended to have a minimum of 8-10 Correction Curve points for best performance. The
Correction Curve is FARMOD/installation-specific and can be saved using the HMI or PC Tools. The amount of required
setpoints depends on appliance-specific requirements.
NOTES:
• Saved Correction Curves can only be loaded to the valve from which the curves were created and read from.
• For valves where the Base Curve is set for each appliance, the Correction Curve needs to be defined for a minimum of 4 points;
minimum, 2 intermediate and maximum points.
• For best performance, it is STRONGLY recommended to have a minimum of 8-10 Correction Curve points.
SV2 Series Safety Shut-off Valves
V2F, V2V
Fig. 56 to meet the desired lambda (CO2) and O2 settings.
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
101