13
SSCBL-RPBL-IOM (10-22) 149159-C
Field-Supplied Support Assembly
⚠ WARNING ⚠
Do not close or block the openings under each end of a system mounted on 4 × 4 treated wooden
rails. If cross supports are used under the 4 × 4 rails, do not enclose the area under the furnace.
The space under the furnace MUST be left open for ventilation.
NOTES:
• The field-supplied, cross-support structure must be adequate for the weight of the system. Cross-
supports should run the entire width of the system to support the rails at the recommended
locations (see
• Whether the supports are mounted directly on a surface or placed up on an additional structure,
the horizontal length of the system should be supported by two 4 × 4 treated wooden rails.
• Model RPBL: If considering this type of installation in snow areas, it is recommended that the
weather-resistant 4 × 4 wooden rails underneath the system be on a cross-support structure at
least 12 inches higher than the roof surface.
1 . Cut treated
4 × 4 wooden
rails for length in accordance with dimension A (see
2 . Space rails in accordance with dimension B (see
, DETAIL A) so that curb cap skirt fits over edge of
boards with rails sitting inside horizontal length of curb cap . If rails are being laid directly on roof, position them
3 . If rails are not being placed directly on surface, install cross-supports underneath rails at ends of unit and at all
cabinet joints (see
, DETAIL B) .
Figure 5. Field-Supplied Support Assembly (Refer to
)
DETAIL A
DETAIL B
