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7. Bleed the fuel unit when the burner motor starts
rotating. To bleed, loosen the vent fi tting (with
plastic hose attached) and catch the oil in an empty
container. Continue to bleed for 15 seconds after oil
is free of air bubbles. Tighten the vent fi tting when
all the air is purged. NOTE: Bleeding might not be
necessary with a two pipe system. When vent fi tting
is closed, burner fl ame should start immediately.
8. ADJUST OIL PRESSURE
a. Locate oil pressure adjusting screw and turn
screw to obtain 140 PSIG pressure.
b. DO NOT REMOVE PRESSURE GAUGE
until later.
9. ADJUST AIR SETTING on burner for a light
orange colored fl ame. Use a smoke tester and adjust
air for minimum smoke (not to exceed
#1) with a minimum of excess air. Make fi nal check
using suitable instrumentation to obtain a CO
2
of
11.5 to 12.5%. These settings will assure a safe and
effi cient operating condition. If the fl ame appears
stringy instead of a solid fi re, try another nozzle of
the same type. Flame should be solid and compact.
10. TURN "OFF" BURNER BY OPENING
SERVICE
SWITCH. Remove
pressure gauge. Install gauge
port
plug and tighten. Re-start burner.
11. HINTS ON COMBUSTION
a. NOZZLES — Although the nozzle is a
relatively inexpensive device, its function is
critical to the successful operation of the oil
burner. The selection of the nozzle supplied
with the microTEKDV boiler is the result of
extensive testing to obtain the best fl ame shape
and effi cient combustion. Other brands of the
same spray angle and spray pattern may be used
but may not perform at the expected level of
CO
2
and smoke. Nozzles are delicate and should
be protected from dirt and abuse. Nozzles are
mass-produced and can vary from sample to
sample. For all of those reasons a spare nozzle is
a desirable item for a serviceman to have.
b. FLAME SHAPE — Looking into the
combustion chamber through the fl ame plug
hole, the fl ame should appear straight with
no sparklers rolling up toward the top of the
chamber. If the fl ame drags to the right or left,
sends sparklers upward or makes wet spots on
the rear door insulation piece, the nozzle should
be replaced. If the condition persists look for
fuel leaks, air leaks, water or dirt in the fuel as
described below.
c. FUEL LEAKS — Any fuel leak between the
pump and the nozzle will be detrimental to good
combustion results. Look for wet surfaces in the
air tube, under the transformer, and around the
air inlet. Any such leaks should be repaired as
they may cause erratic burning of the fuel and in
the extreme case may become a fi re hazard.
d. AIR LEAKS — Any such leaks should be
repaired, as they may cause erratic burning of
the fuel and in extreme cases may become a fi re
hazard.
There are many possible causes of air leaks in oil
lines such as:
i
.
Fitting leaks due to mis-fl ared tubing or
damaged fi tting.
Figure 18: Electrode / Head Setting
Содержание microTEKDV
Страница 14: ...14 Figure 10 Vent Installation Figure 11 Vent Connector Un Assembled ...
Страница 15: ...15 Figure 13 Air Intake Installation Figure 12 Vent Connector Assembled ...
Страница 19: ...19 Figure 15 Schematic Wiring Diagram ...
Страница 30: ...30 Figure 20 microTEKDV Boiler Jacket Insulation ...
Страница 31: ...31 Figure 21 microTEKDV Bare Boiler Assembly ...
Страница 32: ...32 Figure 22 Vent Kit Repair Parts ...