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THB & TLB
Oil Furnaces
–
Furnace Manual
22
670-000-005/1010
10
Service and maintenance
(continued)
Optional Blocked vent shut off (BVSO) cleaning
For continued safe operation, the Blocked Vent Shut Off System
(BVSO) is required to be inspected and maintained annually by a
qualified agency.
1.
Disconnect the 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 thermal switch to the
assembly base;
5.
Without removing the electrical wires, remove the thermal
switch and remove any build-up from the thermal switch
surface;
Do not dent or scratch the surface of the
thermal switch. If the thermal switch is
damaged, replacement is required.
6. Clear and remove any build-up or obstruction inside the
heat transfer tube;
7.
Re-mount the thermal switch to the assembly base;
8.
Re-attach the assembly cover with the screws removed in
step 2;
9.
Re-establish power to the appliance.
Содержание THB High Boy series
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