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If cleaning is necessary, the following steps should be
followed:
1.
Turn "OFF" all power upstream from the furnace;
2.
Disconnect the flue pipe and breach plate. On Sealed
Combustion Systems (SCS) do not disconnect the flue
pipe, only remove the breach plate;
3.
Remove the radiator baffle;
4.
Disconnect the oil line and remove the oil burner from
the furnace;
5.
Clean the secondary tubes and the primary cylinder with
a stiff brush and remove debris with a vacuum cleaner;
6.
Before reassembling the furnace, the heat exchanger
and combustion chamber should be inspected to
determine if replacement is required;
7.
After cleaning, replace the radiator baffle, flue collar
plate and oil burner;
8.
Readjust burner for proper operation.
4.2
BLOWER REMOVAL
To remove the blower from the furnace:
1.
Turn "OFF" all power upstream of the furnace;
2.
Remove blower access door;
3.
Remove the 4 blower retaining wing-nuts;
4.
Slide the blower forward on the rails toward the rear of
the unit;
5.
Reverse the above steps to reinstall the blower. (Refer
to wiring diagram Figure 6 of this Instruction Manual or
the diagram located on the inside of the blower door to
properly rewire the unit.
4.3
ACCESS TO ELEMENT DRAWER
Follow the procedure outlined below to remove the element
drawer to investigate suspected element problems:
1.
Disconnect the 240-VAC power supply;
2.
Remove the burner compartment access panel;
3.
Remove the wiring duct (2 screws) located on the right
at the bottom of the burner compartment;
4.
Remove the element access panel, located under the
burner (6 screws);
5.
Carefully pull out the drawer;
6.
Remove the drawer from the furnace;
7.
Remove the heat shield.
Now that the drawer is out of the furnace, you can visually
inspect or test each element with a voltmeter. To replace an
element, follow the steps below:
1. Disconnect the 2 wires attached to the element;
2. Remove the metal screws that hold the frame on the
drawer (bottom of the drawer);
3. Remove the frame by unscrewing the necessary metal
screws;
4. Check and/or replace the element.
Only Original Equipment Manufacturer replacement parts
may be used.
Figure 5 shows the removal procedure.
Reverse the procedure to install the replacement part.
4.4
TEMPERATURE SENSOR
If the temperature sensor needs to be checked due to
repetitive auto-relief without apparent reason, immerse the
sensor into water at 100° C (212° F) or at 0° C (32° F) . An
L.E.D. located at the bottom of the card will blink at 100° C
(212° F) or it will be on constantly at 0° C (32° F). At any other
temperature it should remain off. If such is not the case, the
card needs to be calibrated. Call a qualified technician.
4.5
BLOCKED VENT SHUT OFF (BVSO) CLEANING
For continued safe operation, the Blocked Vent Shut-Off
System (BVSO) needs to be inspected and maintained
annually by a qualified service technician.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power supply to the furnace before
servicing the blocked vent shut-off.
1.
Remove the two screws holding down the BVSO
assembly cover;
2.
Remove the cover;
3.
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 form the heat transfer
tube assembly;
4.
Carefully 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, it must be replaced.
5.
Clear and remove any build-up or obstruction inside the
heat transfer tube;
6.
Re-mount, lock and fasten the control box with the 2
screws removed in step 3;
7.
Re-attach the assembly cover with the screws removed in
step 1;
8.
Re-establish power to the appliance.
10
WARNING
CAUTION
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