5
GENERAL INSTRUCTIONS
Before seasonal start up it is advisable to have a certified
service agency check the boiler for soot and scale in the
flues, clean the burners and check the gas input rate to
maintain high operating efficiency. The service agency
should make certain the system is filled with water to
minimum pressure and open air vents - if used - to expel
any air that may have accumulated in the system. The
entire piping system should also be checked and if any
leaks appear, they should be repaired immediately.
The venting system should also be inspected at the start
of each heating season. The vent pipe from the boiler
should be checked for signs of deterioration or sagging
joints. Repair if necessary.
The following procedure should be followed to clean and
check the flue gas passageways:
Remove the burners from the combustion chamber
1.
by raising the burners 1. up from the manifold
orifices and pulling toward the front of the boiler,
(See Figure 4)
Disconnect the vent pipe from the vent adapter.
2.
Remove the jacket front panel. (See Figure 5)
3.
Check venter assembly suction pressure.
4.
Connect a slope manometer between the venter
•
and the pressure switch with a tee and additional
tubing and connectors.
Turn the boiler on and read suction pressure on
•
the manometer. Reading should be negative (-)
.55 ± .05 inches of water column or higher for
the DV50 thru 150 and negative (-) .65 ± .05
inches of water column or higher for the DV200.
If this reading is not attainable, contact a certified
service agency.
Remove the flue collector and venter assembly
5.
from the boiler castings by loosening the hold-down
bolts located on each side of the flue collector. (See
Figure 3)
Visually inspect the venter assembly for any unusual
6.
wear or dirt build up.
If venter has oil cups lubricate venter motor once a
7.
month during the heating season with a few drops
of nondetergent motor oil (SAE 20 or 30). Do not
over oil.
Place a sheet of heavy paper or similar material in
8.
the bottom of the combus8. tion chamber and brush
down the flue passageways. The soot and scale will
collect on the paper and is easily removed with the
paper.
A visual check of the main burner and pilot flames
should be made at the start of the heating season and
again in mid-season.
The main burner flame should have a well defined inner
blue mantel with a lighter blue outer mantel. (See
Figure 6) If the flame does not appear this way, check
the burner throats and burner orifices for lint or dust
obstructions.
The pilot flame should envelop 3/8 to 1/2 inch of the
tip of the ignition electrode. To adjust the pilot flame,
remove the pilot adjustment cover screw on the gas valve
and turn the inner screw clockwise
to decrease
or counterclockwise
to increase the pilot flame.
See Figure 1. Be sure to replace the cover screw after
adjustment to prevent possible gas leakage.
The burners and pilot should be checked for signs of
corrosion, rust or scale build-up, and cleaned with a
nylon bristle brush.
The area around the boiler must be kept clear and free
of combustible materials, gasoline and other flammable
vapors and liquids.
The free flow of combustion and ventilating air to
the boiler and boiler room must not be restricted or
blocked.
In the event the flow of combustion products through
the flueways or the boiler venting system becomes
blocked, a flame roll-out safety switch will shut off the
main burner gas. See Figure 5. If this condition occurs,
do not attempt to place the boiler in operation. Contact
a qualified service agency.
It is suggested that a certified service agency be
employed to make an annual inspection of the boiler
and heating system. They are experienced in making
the inspection outlined above and in the event repairs
or corrections are necessary, they can make the proper
changes for safe operation of the boiler.
Содержание ODVB Series
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