Watts AERCO Edge CFR 3000 Operator's And Service Manual page 18

SECTION 4 INITIAL START-UP
Figure 4-3: First Manual Combustion Calibration Screen
7. Connect the gas pressure manometer to the upstream side of the gas train's SSOV (see Section
4.2.2) and connect the Combustion Analyzer and Multimeter (per Section 4.2.3) and ensure that the
heating loop is capable of dissipating sufficient heat at full fire.
8. Verify that the incoming (upstream) gas pressure to the unit is within the allowable range.
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. Choose the NOx requirement for this installation: None, or ≤ 20 PPM.
11. The Combustion Calibration screen provides two methods to ramp the valve position up or down:
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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).
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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).
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Figure 4-4: Choose NOx Requirement
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