10
Eclipse Ratio Regulator, V1, Instruction Manual 742, 5/1/2009
5. Connect the air pressure loading line into the vent on
the top of the ratio regulator. The ratio regulators can
be adjusted to bias the gas outlet pressure relative to
the combustion air pressure when setting low fire
flows. Adjust the regulator as described below.
Gas Bias Adjustment
NOTE: Gas-rich adjustment is limited. If the spring
adjustment will not produce the desired outlet pressure,
make sure that the supply pressure is at least equal to the
desired outlet pressure plus the pressure drop across the
regulator at the required flow.
1. Set the burner air flow to low fire according to the
instructions furnished with the burner.
2. Open the gas shut-off valves to allow gas flow to the
burner. Ignite the burner.
3. Measure the fuel/air ratio using a flue gas analyzer,
metering orifices or estimate the ratio from flame
appearance. Use a screw driver to turn the adjusting
screw clockwise to increase the outlet pressure or
counterclockwise to decrease to outlet pressure.
4. Turn the combustion air to high fire and make sure the
burners stay lit.
NOTE:
Some models are equipped with a pressure tap on
the upstream side. It is open when the screw inside the tap
is unscrewed approximately 1/2 a turn.
Figure 5.1. Adjustment of Outlet Pressure
To Next Page
Loading...
Need help?
General
