Venting - Lennox OHR23-105 Installation Instructions Manual

To check nozzle alignment, again insert the small end into
the end cone and measure the nozzle and electrode align-
ment against the center lines marked on the gauge (again
refer to enclosed illustration sheet). If the nozzle is not cen-
tered, but found to be too far left or right, a new nozzle as-
sembly will need to be ordered. Do not attempt to adjust by
bending the 90 degree elbow in the oil line.
Beckett Oil Burner Nozzle Adjustment
BURNER MUST BE REMOVED FROM FURNACE FOR THIS PROCEDURE.
GAUGE
TO ADJUST NOZZLE:
1−LOOSEN SCREW.
2−SLIDE ENTIRE NOZZLE/ELECTRODE ASSEMBLY BACK AND FORTH UNTIL
NOZZLE JUST TOUCHES GAUGE.
Figure 6

Venting

WARNING
The barometric damper shall be in the same atmo-
spheric pressure zone as the combustion air inlet to
the furnace. Deviation from this practice will cause
improper burner operation and may result in a fire
hazard.
This furnace is certified for use with type L" vent.
B" vent must not be used with oil furnaces.
CAUTION
Do not store combustible materials near the furnace
or supply air ducts. The material (such as paint, mo-
tor oil, gasoline, paint thinner, etc.) may ignite by
spontaneous combustion creating a fire hazard.
NOTE − Oil burning equipment may be vented into an ap-
proved masonry chimney or type L vent. (Type L vent is
similar in construction to type B gas vent except it carries a
higher temperature rating and is constructed with an inner
liner of stainless steel rather than aluminum).
2
1
Page 7
Prior to installation of unit, make a thorough inspection of
the chimney to determine whether repairs are necessary.
Make sure the chimney is properly constructed and sized
according to the requirements of the National Fire Protec-
tion Association. The smallest dimensions of the chimney
should be at least equal to the diameter of the furnace vent
connector. Make sure the chimney will produce a steady
draft sufficient to remove all the products of combustion
from the furnace. A draft of at least .04" w.c. (9.9 Pa) is re-
quired during burner operation.
1. Local building codes may have more stringent installa-
tion requirements and should be consulted before
installation of unit.
2. The vent connector should be as short as possible to
do the job.
3. The vent connector should not be smaller than the out-
let diameter of the vent outlet of the furnace.
4. Pipe should be at least 24 gauge galvanized.
5. Single wall vent pipe should not run outside or through
any unconditioned space.
6. Chimney should extend 3 feet (0.9 m) above highest
point where the vent passes through the roof, and 2
feet (0.6 m) higher than any portion of a building within
a horizontal distance of 10 feet (3 m).
7. The vent must not pass through a floor or ceiling. Clear-
ances to single wall vent pipe should be no less than 6"
(152 mm); more if local codes require it.
8. The vent may pass through a wall where provisions have
been made for a thimble as specified in the Standards
of the National Board of Fire Underwriters. See figure 7.
Wall Thimble
COMBUSTIBLE
WALL
Figure 7
9. The vent pipe should slope upward toward the chim-
ney on horizontal run at least 1/4 inch (6 mm) to the
foot (0.3 m) and should be supported by something
other than the furnace, such as isolation hangers. See
figure 8.
THIMBLE
VENT PIPE