AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 47)

CHAPTER 4: INITIAL START-UP
PR2: 05/09/12 Page 47 of 162
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
4.4 NATURAL GAS COMBUSTION CALIBRATION
The Benchmark 1.5LN Dual-Fuel Boiler is combustion calibrated at the factory prior to
shipping. However, recalibration as part of initial start-up is necessary due to changes in the
local altitude, gas BTU content, gas supply piping and supply regulators. Factory Test Data
sheets are shipped with each unit. These sheets must be filled out and returned to AERCO
for proper Warranty Validation.
It is important to perform the following procedure as outlined. This will keep readjustments
to a minimum and provide optimum performance.
1. Open the water supply and return valves to the unit and ensure that the system
pumps are running.
2. Open the natural gas supply valve(s) to the unit.
3. Set the control panel
ON/OFF switch to the OFF position.
4. Turn on external AC power to the unit. The display will show LOSS OF POWER and
the time and date.
5. Set the unit to the Manual Mode by pressing the AUTO/MAN key. A flashing
Manual Valve Position message will be displayed with the present rate in %. Also,
the MANUAL LED will light.
6. Adjust the air/fuel valve position to 0% by pressing the ▼ arrow key.
7. Ensure that the leak detection ball valve down-stream of the SSOV is open (Figure
4-1).
8. Ensure that the Fuel Selector Switch (Figure 4-4) is in the NATURAL GAS position.