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B. VENTING:
NOTE: On the OH6 & OH8 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. The OH8
flue elbow can also be rotated 90°
clockwise.
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.
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 (or right OH8 only) 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 OH6 and
14132 / 330006 for OH8.
The OH6 & OH8 may be vented through a standard correctly sized chimney.
The OH6 & OH8 may also be horizontally vented through a sidewall. Thermo Products has available the
Field model FDVS-45/FOVP-415 and FDVS-67/FOVP-615 side wall vent kits for such applications. When
installing the sidewall vent kits, outside combustion air must also be applied to the burner. The following
table identifies application order information.
Table 2: Sidewall vent kits
The Field vent kit is set up with 4 inch diameter vent pipe for OH6 and 6 inch diameter vent pipe for the
OH8 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.
The side wall vent may be installed either through the knock-out on the right or left side casing of the unit
or vertically out the top opening of the vestibule.
The combustion air inlet can be installed through the either the lower left side casing knockout or the
lower right side casing knockout.
FIELD VENT TERMINATION
KIT
SIDE WALL VENT
ACCESSORIES KIT
COMBUSTION AIR INTAKE
HOOD KIT
(15’ application MAX) (BURNER SPECIFIC)
(FOR COMBUSTION AIR
APPLICATIONS ONLY)
THERMO PRODUCTS PART
NUMBER
THERMO PRODUCTS
PART NUMBER
THERMO PRODUCTS PART
NUMBER
(OH6) (OH8)
Beckett AFG AOPS8393 AOPS8414 AOPS8394 AOPS8397
Riello BF3 AOPS8393 AOPS8414 AOPS8395 AOPS8416
Beckett NX
(OH6 ONLY)
AOPS8393 N/A AOPS8412 AOPS8413
BURNER
SIDE WALL VENTING APPLICATION ORDER INFORMATION