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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
57
of
157
NATURAL GAS Manual Combustion Calibration Instructions
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 4-6: 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
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-
1. If it isn’t, remove the brass hex nut on the SSOV actuator to
access the gas pressure adjustment screw (Figure 4-3). Make adjustments 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.
TABLE 4-1: Gas Pressure Downstream of SSOV @ 100% Fire Rate
Model
Single Fuel
Dual Fuel
BMK750
2.0” ± 0.2” W.C. (0.50 ± 0.05 kPa)
-
BMK1000
2.4” ± 0.4” W.C. (0.60 ± 0.10 kPa)
-
BMK1500
3.6” ± 0.1” W.C. (0.90 ± 0.02 kPa)
3.6” ± 0.1” W.C. (0.90 ± 0.02 kPa)
BMK2000
3.4” ± 0.2” W.C. (0.85 ± 0.05 kPa)
6.3” ± 0.1” W.C. (1.57 ± 0.02 kPa)
BMK2500
2.0” ± 0.1” W.C. (0.50 ± 0.02 kPa)
5.8” ± 0.1” W.C. (1.44 ± 0.02 kPa)
BMK3000
2.1” ± 0.2” W.C. (0.52 ± 0.05 kPa)
6.0” ± 0.2” W.C. (1.49 ± 0.05 kPa)
BMK4000
3.0” ± 0.2” W.C. (0.75 ± 0.05 kPa)
N/A
BMK5000
6.3” ± 0.2” W.C. (1.56 ± 0.05 kPa)
6.3” ± 0.2” W.C. (1.56 ± 0.05 kPa)
BMK5000
(Low Gas Pressure)
2.6” ± 0.1” W.C. (0.65 ± 0.02 kPa)
-
BMK6000
7.9” ± 0.2” W.C. (1.97 ± 0.05 kPa)
7.9” ± 0.2” W.C. (1.97 ± 0.05 kPa)
BMK6000
(Low Gas Pressure)
2.0” ± 0.2” W.C. (0.50 ± 0.05 kPa)
-
PRE-SET CALIBRATION STEPS
FINE VALVE POSITION CONTROLS