Benchmark Platinum-Edge: Operation-Service Manual
SECTION 4 – INITIAL START-UP
OMM-0137_D • GF-211
•
7/16/2019
Technical Support
•
(800) 526-0288
•
Mon-Fri, 8 am - 5 pm EST Page 42 of 146
NATURAL GAS Manual Combustion Calibration Instructions
30%
30%
5.5% ± 0.5%
<20 ppm 6.0% ± 1.0%
≤9 ppm
<50 ppm
18%
18%
6.0% ± 1.0%
<20 ppm 6.5% ± 1.5%
≤9 ppm
<50 ppm
26. If the oxygen level at the lowest valve position is too high, and the Blower voltage is at the
minimum value, you can adjust the TAC screw, which is recessed in the top of the Air/Fuel
Valve (see Figure 4-3). Rotate the screw 1/2 turn
clockwise
(CW)
to add fuel and reduce
the O
2
to the specified level. Recalibration MUST be performed again from 60% or 50%
down to the lowest valve position after making a change to the TAC screw.
This completes the NATURAL GAS combustion calibration procedure.
4.4.2 PROPANE GAS COMBUSTION CALIBRATION
These instructions apply only to units running
PROPANE
gas.
PROPANE Combustion Calibration Instructions
1. Set the Edge Controller’s Enable/Disable switch to
Disable
.
2. Open the water supply and return valves to the unit and ensure that the system pumps are
running.
3. Open the
PROPANE
supply valve to the unit.
4. Turn external AC power to the unit
ON
.
5. On the Controller, go to:
Main Menu
Calibration
Manual
Combustion
. If necessary,
enter a technician level password.
6. The first
Manual Combustion Calibration
screen appears lists three steps that must be
completed before continuing:
Figure 4-7: First Manual Combustion Calibration Screen
7. Connect the gas pressure manometer to the
upstream
side of the gas train’s SSOV, as
shown in Section 4.2.2 and connect the Combustion Analyzer and Multimeter, as shown in
Section 4.2.3, and ensure that the heating loop is capable of dissipating sufficient heat at
full fire.
8. Verify that the incoming gas pressure to the unit is within the allowable range (see the
Benchmark Pre-Installation Gas Supply Guide
(TAG-0047, GF-2030)).
9. Once you have completed the previous step, move the manometer (or use a secondary
one) to the the
downstream
side of the SSOV and press
Next
to continue.