CleaverBrooks FLX 1000, Руководство по эксплуатации, обслуживанию и запасным частям

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Chapter 2 Profire V Burner
2-34 750-177
H. Gas System Adjustments
Refer to the burner data plate located inside the control panel door. The nameplate will list the following burner
information:
• burner and control voltage
• phase
• cycle
• motor amperage
• maximum and minimum fuel input settings
• manifold pressure (at zero furnace pressure - add the furnace pressure to get the correct manifold pressure at
maximum firing rate)
These procedures assume that the pre-startup tasks, check list, electrical interference test, and pilot turndown
tests have been performed in accordance with the instructions in this manual.
For most efficient combustion, allow the boiler to fully warm up before making adjustments. Refer to the boiler
instruction manual for the boiler control settings.
GAS PRESSURE
Gas must be supplied at a pressure high enough to overcome the pressure loss in the burner gas train and
furnace pressure while running at full input. Refer to nameplate inside control panel for gas pressure
requirements at train inlet and manifold. The pressures listed are based on nominal 1000 Btu/cu ft. natural
gas at elevations up to 2000 feet above sea level.
The gas pressure required at the burner manifold is the pressure that is required to fire the burner at its rated
capacity. The gas pressure regulator must be adjusted to achieve this pressure to assure full input.
LOW GAS PRESSURE SWITCH
Turn adjusting screw until indicator moves to a pressure setting slightly below the operating gas pressure. The
control will break a circuit if pressure is below this set point. The control should be finally adjusted to prevent
operation with low gas pressure, but not at a pressure so close to normal operating pressure that unnecessary
shutdowns occur. The switch must be manually reset after tripping. To reset, allow gas pressure to rise and
press the manual reset button.
HIGH GAS PRESSURE SWITCH
Turn the adjusting screw until the indicator moves to a pressure setting slightly above the maximum operating
gas pressure. The control will break a circuit if pressure exceeds this value. The control should be adjusted to
prevent operation with excessive gas pressure, but not at a pressure so close to normal operating pressure that
unnecessary shutdowns occur. This switch must be manually reset after tripping. To reset, allow gas pressure
to drop and press the manual reset button.
GAS FLOW
The volume of gas is measured in cubic feet as determined by a meter reading. The gas flow rate required
depends on the heating value (Btu/cu ft). The supplying utility can provide this information as well as pressure