Dettson OLR154F20A, Installation Instructions And Homeowner'S Manual

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9. After the cleaning replace the heat exchanger baffles, flue
collar plate and oil burner;
10. 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 annually by a
qualified service technician.
1. Disconnect power to the appliance;
2. Remove the two screws holding on the BVSO assembly
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 inside 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
removed in step 2;
9. Re-establish power to the unit.
4.3 CLEANING OF THE BURNER HEAD
Once annually, 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
Replace the nozzle once a year with the one specified in
Table 7, p. 13.
4.5 REPLACING THE OIL FILTER
Tank Filter
The tank filter should be replaced as required. Follow the
manufacturer’s instructions.
Secondary Filter
The 10 micron, or finer, filter cartridge should be replaced
annually. Follow the manufacturer’s instructions.
4.6 REPLACING THE AIR FILTER
Dirty filters have an impact on the efficiency of the
furnace and increase fuel consumption.
Air filters should be replaced at least once a year. Very
dusty conditions, the presence of animal hair and the like
will require more frequent changing or cleaning.