3.1 Assisted Combustion Calibration
Complete the instructions below to perform Assisted Combustion Calibration on the current
unit. If you press the Back or Home buttons at any time before completion, the calibration
operation is disabled and normal operation resumes. Assisted Combustion Calibration uses the
same calibration steps as Manual Combustion Calibration.
1. Ensure the Enable/Disable switch on the unit’s front face is in the Enable position.
2. Go to: Main Menu → Calibration → Assisted Combustion.
3. If the O
2
sensor is not connected, a message appears saying that combustion calibration
cannot be performed; this function must abort. In that case, connect the O
2
sensor and
repeat Step 2.
4. The Assisted Combustion Calibration screen appears listing 3 conditions that must be
met or performed before continuing:
• Verify that the upstream gas supply pressures to unit is between 4.0” and 14” W.C.
• Install the following devices on the unit, per the Benchmark Platinum-Edge Operation
Manual:
o A manometer on the high gas pressure switch
o A combustion analyzer probe in the exhaust manifold
o A multimeter to read flame strength and combustion analysis
• Ensure the facility can dissipate the heat generated at full fire, to avoid over
temperature conditions. If current heat demand is low (e.g., outside temperature is
relatively high), consider performing the entire combustion calibration process as
quickly as possible to reduce the amount of heat generated by the test.
Figure 3.1-1: Assisted Combustion: Assisted Combustion Calibration Screen
5. Once all three conditions have been verified/met. Press Next to continue.
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