LAARS Heating Systems
Page 104
STANDARD
To Pilot Coupling
Figure 46. Fuel Pressure Adjustment Screw
10.B.2 Combustion Setup Procedure
The gas system must be set up properly, so the boiler
will run efficiently throughout its modulation range under
the installed conditions. This setup should only be
performed by a factory trained technician.
1. On the Pressure Regulating Gas Valve, locate the
main pressure adjustment by removing the brass
plug at the top front of the unit.
See Figure 46
2. Proceed to the Manual Firing Rate Control Screen
from the Configuration Menu
and enable the manual firing control. Select the
Firing Rate menu and set the Manual Firing Rate to
100%.
3. Proceed next to the O2 screen from the
Configuration / Miscellaneous Menu. Disable the O
2
Trim.
Remove brass cap to access fuel
pressure adjustment screw
