Brochure

The manufacturer of Reznor heating equipment, for years, has pioneered in separated combustion system
technology, eliminating “open ame” combustion problems. This has resulted in a complete line of Reznor
products using the separated combustion principle-
● air for combustion is mechanically induced from outside the building,
preventing dirt, lint, dust or other contaminants in the indoor atmosphere
from entering the burner and combustion zone of the furnace,
● the air ow is metered to provide optimum and efcient combustion that
is unaffected by negative building pressure or wind,
● after combustion, the air is exhausted back to the outdoor atmosphere.
Reznor separated combustion products provide all of the benets while requiring only one building penetration.
See the venting illustrations below.
Use only approved vent terminals. No other venting arrangements are approved or certied for use with Models
UDAS, UDBS or UEAS heaters. Either the horizontal vent/combustion air terminal kit (Option CC6 or Option
CC14) or the vertical vent/combustion air terminal kit (Option CC2) is required.
Refer to Venting Installation Manual Form I-UD-V-SC for Models UDAS and UDBS; Form I-UEAS for Model
UEAS. Or contact your Reznor Representative at 800-695-1901 for more detailed information.
HorizontalVentingofSeparatedCombustion
Unit through Wall
● See the illustration to the right for a typical installation of
a single horizontal vent terminal and concentric adapter.
When Option CC6 is ordered, one horizontal vent terminal/
combustion air inlet assembly is provided.
NOTE: Illustration for typical installation example only. Vent terminals may
vary based on heater size and model.
VerticalVentingofSeparatedCombustion
Unit through Roof
● See the illustration to the right for a typical installation of
one vertical vent terminal and concentric adapter. If vertical
vent (Option CC2) is selected, a vertical vent terminal/com-
bustion-air inlet assembly is provided.
NOTE: Illustration for typical installation example only. Vent terminals may
vary based on heater size and model.
Option CC14
Vent/Combustion
Air Terminal
Wall
Painted Concentric Adapter Box
extends onl 3” (76mm) from the wall.
Combustion Air
Pipe to the Heater
Concentric
Pipes
Exhaust Air Vent
Pipe from the Heater
Residential Garage - Horizontal Venting of
SeparatedCombustionUnitthroughWall
(Models UDAS and UDBS Only)
Option CC14, the Compact, Aesthetic, Concentric Vent/Com-
bustion Air, Horizontal Vent Kit is for use with Model UDAS
and UDBS in sizes 30, 45, 60, and 75.
The most common use for these vent kit is for Model UDAS
for residential garage installations. This option allows a hom-
eowner to vent out a side wall and avoid the unsightly 18" to
36" exhaust vent. This attractive vent kit preserves the home's
exterior appearance.
For more information, contact your Reznor Representative at
800-695-1901, or see the instruction manual Form I-UDAS/
UDBS-ASC.
NOTE: Siding trim is eld-supplied by contractor to match home appear-
ance.
ReznorSeparatedCombustionSystems
FollowingisanoveralldescriptionofSeparatedCombustionSystemsasitrelatesto
ModelsUDASandUDBS.Formorespecicseparatedcombustionventinginformation,
especiallyasitrelatestoModelUEAS,pleaseseetheappropriateinstallationmanual.
For installations where dirt, dust,
and other air borne contamination is
present in the indoor environment,
it is recommended to use separated
combustion units (UDAS, UDBS).
These models use air from outside
the space for combustion. This will
help reduce the build up of contami-
nates on the burner which would af-
fect the combustion process. Refer
to the installation manuals for recom-
mended frequency of maintenance
and cleaning.
Form RZ-C-UH (Version H) Page 43
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