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The vent connector pipe between the furnace and chimney shall be of equal diameter as the flue outlet of the
furnace. The vent connector pipe must be made of 24 gauge (or thicker) corrosion-resistant steel. The
vent connector pipe should be as short as possible and installed so that it has a continuous rise from the
furnace to the chimney. The horizontal length of a connector to a natural draft chimney or vent serving a single
appliance shall not be more than 75 percent of the height of the vertical portion of the chimney or vent above
the connector. Elbows should be minimized and the pipe should be joined with metal screws and supported by
straps. All horizontal runs of vent connector pipe should be pitched upward a minimum of ¼ inch per foot of run.
A thimble should be used to connect the vent connector pipe to the chimney so the pipe may be readily
removed in case of inspection or replacement. See Fig. 6 on preceding page.
B. VENTING:
NOTE: On the OL6 it is possible to rotate the flue elbow (which is factory installed for vertical discharge)
90° counter clockwise from the vertical position to adapt to various venting systems.
Notice: Blocked Vent Switch Installation
The blocked vent switch kit must be installed to comply with CAN STD B140.4 where applicable. For
installation instructions see AOPS2687 kit.
c CAUTION MUST BE TAKEN NOT TO EXCEED 90° ROTATION (OF THE FLUE
ELBOW) .
ROTATION OF FRONT FLUE ELBOW:
When an installation requires that the flue exit out the left side casing, remove screw securing the 90
deg. elbow and rotate it 90°. Then, remove knock-out in side casing and extend vent through the opening.
A trim collar may be ordered from Thermo Products to hide the gap around the flue pipe. This trim collar,
however, is not required for operation. Trim collar/gasket part numbers(s) 14121 / 330073 for OL6.
The OL6 may be vented through a standard correctly sized chimney.
The OL6 may also be horizontally vented through a sidewall. Thermo Products has available the Field
model FDVS-45/FOVP-415 side wall vent kit for such applications. When installing the sidewall vent kit,
outside combustion air must also be applied to the burner. The following table identifies application order
information.
SIDE WALL VENTING APPLICATION ORDER INFORMATION
FIELD VENT TERMINATION
BURNER
THERMO PRODUCTS PART
(OL6)
Beckett AFG
AOPS8393
Riello BF3
AOPS8393
Carlin EZ-1HP
SIDE WALL VENTING NOT AVAILABLE
The Field vent kit is set up with 4 inch diameter vent pipe for OL6 with concentric through-the-wall vent
termination/inlet air vent hood. The combustion air inlet pipe diameter is also 4 inch diameter. For Riello,
the combustion air inlet pipe will be reduced to 3 inch diameter with the Riello sidewall vent kit. For
Beckett, the combustion air inlet pipe will be reduced to 3" diameter with the Beckett sidewall vent kit.
KIT
(15' application MAX)
NUMBER
Table 2: Sidewall vent kits
SIDE WALL VENT
ACCESSORIES KIT
(BURNER SPECIFIC)
THERMO PRODUCTS
PART NUMBER
AOPS8394
AOPS8395
10
COMBUSTION AIR INTAKE
HOOD KIT
(FOR COMBUSTION AIR
APPLICATIONS ONLY)
THERMO PRODUCTS PART
NUMBER
AOPS8397
AOPS8416
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