Cleaning The Blocked Vent Shut-Off Device (Bvso); Cleaning The Burner Head; Replacing The Nozzle; Replacing The Oil Filter - Bryant OBL154 Installation Instructions Manual

If a cleaning is necessary, the following steps should be
performed:
1. Turn OFF all utilities upstream from the furnace;
2. Disconnect the flue pipe;
3. Remove the flue collar panel located at the front of
the furnace;
4. Remove the heat exchanger baffles;
5. Disconnect the oil line and remove the oil burner;
6. Clean the secondary tubes and the primary cylin-
der with a stiff brush and a vacuum cleaner;
7. Before re-assembling the unit, the heat exchanger
and combustion chamber should be inspected to
determine if replacement is required;
8. After the cleaning, replace the heat exchanger baf-
fles, flue collar plate and oil burner;
9. Readjust the burner for proper operation.
4.2 CLEANING THE BLOCKED
VENT SHUT-OFF DEVICE
(BVSO)
For continuous safe operation, the Blocked Vent Shut-off
device (BVSO) must be inspected and maintained annu-
ally by a qualified service technician.
1. Disconnect power to the appliance;
2. Remove the two screws holding on the BVSO as-
sembly cover;
3. Remove the cover;
4. Remove the two screws holding the control box to
the heat transfer tube assembly. Sliding the control
box in the appropriate direction will unlock it from
the heat transfer tube assembly;
5. Carefully remove any build-up from the thermal
switch surface;
CAUTION
Do not dent or scratch the surface of the thermal
switch. If the thermal switch is damaged it MUST
be replaced.
6. Clean and remove any build-up or obstruction in-
side the heat transfer tube;
7. Re-mount, lock and fasten the control box with the
2 screws removed in step 4;
8. Re-attach the assembly cover with the screws re-
moved in step 2;
9. Re-establish power to the unit.
4.3 CLEANING THE BURNER
HEAD
Once a year, remove the retention head and electrodes
from the drawer assembly and remove all foreign matter,
if necessary. Also clean the extremity of the burner tube,
if necessary.

4.4 REPLACING THE NOZZLE

Change the nozzle once a year with the one specified in
Table 7.

4.5 REPLACING THE OIL FILTER

Tank Filter
The tank filter should be changed as required. Follow the
manufacturer's instructions.
Secondary Filter
The 10 micron, or finer, filter cartridge should be changed
annually. Follow the manufacturer's instructions.

4.6 CHANGING THE AIR FILTER

Dirty filters have an impact on the efficiency of the fur-
nace and increase fuel consumption.
Air filters should be changed at least once a year. Very
dusty conditions, the presence of animal hair and the like
will require more frequent changing or cleaning.
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