Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 4
– INITIAL START-UP
OMM-0145_A99
• GF-218 • 9/18/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
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of
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PROPANE Combustion Calibration Instructions
7. Verify that the incoming gas pressure to the unit is within the allowable range (see the
Benchmark Gas Supply Design Guide
(TAG-0047, GF-2030).
9. Once you have completed the previous step, move the manometer (or use a secondary
one) to the
downstream
side of the SSOV and press
Next
to continue.
10. For the NOx requirement choose
None
.
Figure 4-8: Choose NOx Requirement
11. The main
Manual Combustion Calibration
screen appears. It provides two methods to
ramp the unit’s valve position up or down:
•
Method 1
: Toggle through the pre-set calibration points till you reach the desired
valve position, then press
Go
to go to that point (left image below).
•
Method 2
: Enable
Fine VP Step
, then manually press the
+
or
–
buttons once per
1% to bring the unit to the desired valve position (right image below).
Figure 4-9: Manual Combustion Calibration Screens
12.
Set the Controller’s Enable/Disable switch to
Enable
.
13. Change the valve position to 30%, press the
Go
button, then verify that the unit has ignited
successfully and is operating as expected.
14. Use the
(Right) arrow key to change the valve position to
100%
, then press
Go
.
15. Verify that the gas pressure on the
downstream
side of the SSOV is within the required
range shown in Table 4-
4. If it isn’t, remove the brass hex nut on the SSOV actuator to
access the gas pressure adjustment screw (Figure 4-3). Adjust using a flat-tip screwdriver,
slowly rotating the gas pressure adjustment (in 1/4-turn increments)
clockwise
to
increase
gas pressure or
counterclockwise
to
reduce
it. The resulting gas pressure reading on the
downstream
manometer should fall in the range listed below.
PRE-SET CALIBRATION CONTROLS
VALVE POSITION CONTROLS
