PVI Industries B40 manual 4

PVI FIREPOWER®

B40 OIL BURNER START-UP (con't)

After purging is complete, terminal 3 energizes the oil valve and terminal 4 energizes the ignition transformer. The flame is then established and the VDC reading on the meter should read a steady 14-18 VDC for photocell or 4-6 VDC for UV amplifiers. Each different control will have the required flame response signal stamped on it. This is the minimum for it to properly operate. If the burner fails to light during the initial period, it is probably due to air in the line. The control will lock out. Push the flame safeguard reset button to restart burner and begin the purge cycle again.

Once the flame is established, set the oil pressure (measured at the oil pump) at the pressure shown on the tag attached to the burner. Oil pressure should be adjusted while firing on the second stage. Do not exceed the oil supply pressure specified on the setup tag.

16.Two stage oil burners. Before turning the unit on, make sure all valves in the oil supply and return lines are on. Check the first stage air damper setting against the setup tag attached to the burner. The second stage air setting must be adjusted while the burner is operating. Turn the unit on using the rocker switch on the side of the control cabinet. If the operating control switches are closed, the burner blower should come on and prepurge begin.

If nothing happens, check the control to be sure it is not in the tripped position and reset it by pushing the flame safeguard reset button. The burner should prepurge for no longer than thirty seconds.

After purging is complete, terminal 3 energizes the oil valve and terminal 4 energizes the ignition transformer. The flame is then established and terminal 5 energizes the main oil valve after a short delay. This will simultaneously supply oil to the second stage oil nozzle and the damper actuator, driving the damper open. The burner can be temporarily locked in the first or second stage by adjusting the low-fire hold switch. The VDC reading on the meter should read a steady 14-18 VDC for photocell or 4-6 VDC for UV amplifiers. Each different control will have the required (minimum) flame response signal stamped on it. If the burner fails to light during the initial period, check for air in the line. The control will lock out. Push flame safeguard reset button to restart burner and begin purge cycle again.

Once the flame is established, set the oil pressure (measured at the oil pump) at pressure shown on the tag attached to the burner. Oil pressure should be adjusted while firing on the second stage. Do not exceed the oil supply pressure specified on the setup tag.

17.Check flue gases with a flue analyzer and smoke spot pump to make final settings of the air damper.

a.Readings need to be taken from a hole in the vent several inches from flue outlet connection.

b.Insert draft gauge into the test opening in the stack. Draft in stack should read -.02" to -.06" W.C. Adjust draft regulator, if installed.

c.Insert analyzer in test opening and determine O2 content in percentage.

d.Gradually close air damper to decrease O2 reading or open air damper to increase O2 reading until optimum O2 % (4-5%) is reached. Refer to Figure 22-2 & 5, pages 7 & 8 for damper adjustment details.

e.Once the O2 reading is in the specified range, check smoke content in the flue gas by pumping ten times through a new smoke spot sample paper. Smoke spot should not exceed a #2. If the smoke spot exceeds a #2, it may be necessary to increase the O2 %.

f.Once combustion is set, take note of the gross stack temperature; maximum gross stack is to be 400°F, minimum net stack is to be 300°F.

(NOTE: net temperature is the total stack temperature, less room temperature.) If an excessively high gross stack temperature is recorded, consult the factory.

g.Make sure air shutter is locked securely in place.

18.On two-stage oil burners, the preceding analysis must be done for the first and second stage.

19.Check each operating and limit control to be sure they function properly by lowering and raising the temperature setting on each of the controls, causing the burner to cycle on and off.

PV500-22A 08-98 4 Section 22A