OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 43 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 5: INITIAL START-UP
Figure 5-4: Gas Pressure Adjustment Screw and TAC Screw Location
W A R N I N G :
Combustion calibration and O
2
Trim can both alter the calibration voltage to the blower and
thus interfere with each other. If O
2
Trim is enabled and a change is made to any calibration
point during combustion calibration you must make a corresponding change to the O
2
Target,
O
2
Lower Limit and O
2
Upper Limit in
Main Menu
→
Advanced Setup
→
Performance
→
O
2
Trim
→
O
2
Trim Parameters
(see Section 9.2
–
O
2
Sensor Calibration
).
5.3.1 Instructions For Combustion Calibration
1.
Ensure the Edge Controller’s Enable/Disable switch is set to
Disable
.
2. Open water supply and return valves to unit and ensure system pumps are running.
3. Open the
NATURAL GAS
or
PROPANE GAS
supply valve to the unit.
4. Turn external AC power to the unit
ON
.
5. Go to:
Main Menu
→
Calibration
→
Manual Combustion
; if necessary, enter a
technician level password.
6. After the first
Manual Combustion Calibration
screen appears:
•
Verify incoming (upstream) gas pressure is within the allowable range (Section 2.8.1).
•
Connect gas manometer to upst
ream side of gas train’s SSOV (Section 5.2.2) and
connect the Combustion Analyzer (Section 5.2.3).
•
Ensure heating loop is capable of dissipating sufficient heat at full fire. In addition, if
your unit is running O
2
Trim, you must turn that feature OFF before continuing; O
2
Trim
will interfere with combustion calibration.
Figure 5-5: First Manual Combustion Calibration Screen
