25
9. Pull the old sealing gasket down off the flange of
the upper heat exchanger half.
10. Scrape off any residual gasket material off the heat
exchanger mating flanges.
Replacing the firepot:
1. Align the slot in the front face of the firepot with the
burner tube sleeve and gently lower the firepot into
the bottom heat exchanger half.
2. Holding the firepot near the perimeter, gently push
the firepot all the way into the bottom heat
exchanger half until it seats.
3. Completely wet the gasket with water using a spray
pump bottle, position the tabs over the studs, and
push the gasket upward against the sealing flange
of the upper heat exchanger half.
4. Install the brass nuts on the studs by engaging only
2 or 3 threads.
5. Position the bottom heat exchanger half underneath
the upper heat exchanger half and rotate the
bottom half so that the slots in the bolting tabs
engage the stainless steel studs. There is no further
need to hold onto the bottom half as it will now be
suspended on the stud nuts.
6. Push upward on the can and thread the nuts finger-
tight as far as possible.
7. Intermittently tighten the stud nuts with a wrench in
a sequence that will pull the heat exchanger halves
together evenly. Tighten all nuts to 90 inch-lbs
Torque once and then alternately re-tighten all nuts
again to 100 inch-lbs
THE RE-TIGHTENING
SEQUENCE IS ABSOLUTELY NECESSARY TO
ENSURE A TIGHT JOINT
.
8. Tighten the nuts until further torquing meets with
much resistance. The heavy spring action of the
bolting tabs keeps a constant tension on the joint.
9. Re-assemble the front panel, breech plate, limit
control and burner in opposite sequence to their
removal.
10. Follow the instructions for starting the burner for the
first time to cure the firepot and perform combustion
checks.
1.3)
Drawer assembly:
Remove the drawer assembly. Clean all foreign matter
from the retention head and electrodes. If a Beckett
AFG burner has been installed, the burner will have to
be removed to check the retention head and to check
for proper “Z” dimension with the Beckett “T” gauge
supplied with every burner. Check for any sign of oil
boiling out of the nozzle and caulking - the solenoid
valve could be leaking (if applicable).
1.4)
Nozzle:
Replace the nozzle with the one specified in table #4.1
to #4.3.
1.5)
Oil filter:
Tank filter:
The tank filter should be replaced as required.
Secondary filter:
The 10 micron (or less) filter cartridges should be
replaced annually.
1.6)
Air filters:
Air filters are the disposable types. The disposable
filters should be replaced on at least an annual basis.
Dusty conditions, presence of animal hair etc. may
demand much more frequent filter changes. Dirty filters
will impact furnace efficiency and increase oil
consumption.
1.7)
Motor lubrication:
Do not lubricate the oil burner motor or the direct drive
blower motor as they are permanently lubricated.
1.8)
CAS-2B combustion air kit (chimney
venting):
If used, check the CAS-2B combustion air kit for proper
operation. Check to see that the inlet screen is not
plugged. Block the air inlet completely and ensure that a
zero smoke reading results. If a zero smoke reading is
not obtained, set up the burner as indicated in Part 2,
section 3.
Gradually block off the intake. The CO2 should increase
by a maximum of 0.5 percentage points at the fully
blocked condition. If not, check that the VRV gate is
pivoting freely and that the pivot rod is in a horizontal
position. Also, check that the counterweight has been
properly adjusted in accordance with the CAS-2B
installation instructions.
Summary of Contents for OLR Series
Page 29: ...DNS 0571 Rev B DNS 0573 Rev B 30 FIGURE 5 1 Model OLR105A12B FIGURE 5 2 Model OLR160B20B...
Page 30: ...31 FIGURE 5 3 Model OUF105A12B FIGURE 5 4 Model OUF160B18 DNS 0568 Rev C DNS 0572 Rev C...
Page 31: ...FIGURE 5 5 Model OLF105A12B DNS 0570 Rev B FIGURE 5 6 Model NOUF105A12B 32 DNS 0674 Rev C...
Page 32: ...33 FIGURE 5 7 Model NOUF160B18B FIGURE 5 8 Model NOLF105A12B DNS 0676 Rev C DNS 0675 Rev D...
