Set The Bypass Pilot Gas (Optional) - Eclipse Furnnox 210 Series Installation Manual

Step 6: Set High Fire Gas
Tap "D"
Tap "B"
Manometer
Figure 4.4. Set High Fire Gas
1. Use the gas curve from the appropriate Furnnox
datasheet for the gas being used to find the differential
gas pressure needed at high fire. This is the target
value for high fire.
2. Connect the manometer to taps B and D (across the
gas orifice).
3. Measure the high fire differential gas pressure for the
first burner.
4. Adjust the gas butterfly valve at the burner until the gas
flow is at the target value.
5. Repeat 3 thru 4 for the other burners in the zone.
6. Check the gas pressure at the inlet to the zone ratio
regulator. This should be at least 5" w.c. (12.5 mbar)
higher than the loading line pressure. It should not
exceed the maximum pressure rating of the ratio
regulator.
■ Insufficient gas inlet pressure may cause the
proportionator to remain fully open as the burner
system turns down from high fire, causing excess
fuel operation and possible accumulation of
unburned fuel in the chamber. In extreme cases,
this may cause explosions or fires.
Eclipse Furnnox Burner, V1, Installation Guide 210, 2/14/2011
WARNING
Step 7: Set Low Fire Gas
1. Drive the system to low fire.
2. Use the gas curve from the appropriate Furnnox
datasheet for the gas being used to determine the
differential gas pressure required for low fire. This is
your target value for low fire.
3. Measure the gas pressure at the first burner.
4. Adjust the ratio regulator until the gas flow is on the
target value.
NOTE: It is very difficult to measure the very low
pressures experienced at low fire, and it may be
necessary to rely on visual inspection. The main intent is
to provide a clean stable flame with a good flame signal
that will not cause the furnace temperature to overshoot.
If the pressure required is too low to be measured, adjust
the ratio regulator until a gas flow is obtained that will
provide a clean stable flame with a strong flame signal.
Step 8: Verify the Gas Settings
Make sure that all settings are still the same after cycling
the system several times between high and low fire.
Step 9: Readjust Settings
As application temperature increases, setting may vary.
Recheck and readjust as temperatures increase.
NOTE: When all the settings have been completed, mark
the position of the indicator on the butterfly valves to
indicate valve position.

Set the Bypass Pilot Gas (Optional)

1. Set the system to low fire.
2. Make sure that the blower is on.
■ Before you perform this procedure, make sure the
flame monitoring control system is working.
3. Use the flame monitoring control system to start the
ignition and the bypass pilot gas for all the burners in
the zone.
4. Adjust the manual butterfly valve in the bypass line until
you obtain reliable ignition within the required trial for
ignition time limit.
5. Repeat 4 for all the other burners and zones (if any).
WARNING
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