Reznor UDBS Option - Installation - Separated Combustion Venting - Manual (Page 15)

Form I-UD-V-SC, PN195676R17, Page 15
THIRD, Install the Exhaust (Vent) Terminal.
Follow the instructions in FIGURE 2, page 5
.
SECOND, Install Combustion Air Inlet.
1) Slide the combustion air inlet over the vent pipe.
2) Fasten bottom of inlet to the combustion air pipe
with sheetmetal screws. Be sure not to penetrate
the vent pipe.
3) At the top, completely seal the space between
the vent pipe and the air inlet with silicone.
Double-wall V
ent Pipe Cold Climate NOTE: In geo-
graphic areas where the design
ambient is -10°F or lower, this
minimum height is 24” (610 mm)
Single-wall Combustion Air Pipe
FIRST, If needed, add
a section of double-
wall pipe to reach
minimum height
requirement
Seal completely with
silicone to prevent
water leakage
FIGURE 16 - Install
Combustion Air Inlet
and Vent Terminal
9) Attach the indoor combustion air pipe. Use sheetmetal screws to attach the
single-wall combustion air pipe run to the collar on the concentric adapter box.
Seal with tape or sealant. If using 3” combustion air pipe on Sizes 30, 45, and 60,
install a taper-type reducer as illustrated in FIGURE 7, page 7. Review Paragraph
1.7 concerning condensation; comply with all requirements that apply.
FIGURE 17 - Installation of Unit with Vertical Vent Terminal/
Combustion Air Inlet (Option CC2)
Rear
View
Side View
Installation of the vertical vent and combustion air system on your separated-combus-
tion unit is complete. Verify compliance with all venting installation requirements,
pages 3-8, and FIGURE 17.