Carrier Aero 39MN Series Installation, Start-Up And Service Instructions Manual page 173

Venting for Indoor Installations — For all indoor installa-
tions, a listed venting system must be properly designed for the
specific application. A factory vent riser kit is available. See
Fig. 148 for an example.
For indoor installations where the factory flue riser kit is not
used, the venting system must be properly designed for the spe-
cific application by a manufacturer/provider of the listed type
of venting systems. Connection from furnace-induced draft
fans to round vent pipe requires custom adapters to ensure
leak-free joints. Contact a venting system manufacturer for
availability, if the venting system was not included with the
heating system.
Fig. 148 — Indoor Venting with Flue Riser Kit
Vertical Vent (Category 1) System Installation — For
indoor rack system vertical vent installations, note the follow-
ing for proper installation:
• See Fig. 149 for Category 1 indoor vertical vent system.
• Vent system must be sized and installed in accordance
with ANSI Z223. 1 (NFPA 54). See Table 42 - Category
1 Vent Diameters.
• Use UL-441 Type B Vent materials.
• Minimize use of elbows and horizontal runs in vent pip-
ing
• Vent must terminate in a listed, weatherproof vent cap.
• Determine height from highest heater discharge point to
roof of building. Vent pipe must extend at least 2 ft
(0.61 m) above the highest point on the roof.
• Vent connectors serving Category 1 heaters must not be
connected into any portion of a mechanical draft system
operating under positive pressure.
• Separated combustion systems are not permitted in mul-
tiple heater assemblies.
COMBUSTION
AIR INTAKE
LOUVERS
OPTIONAL
VENT KIT
all
173
LISTED VENT CAP
24" MIN.
MIN. 5 FT
OPTIONAL
VENT KIT
DRAIN
Fig. 149 — Category 1 Indoor Vertical Vent System
Horizontal Vent System Installation — For all indoor rack
system horizontal vent installations, note the following for
proper installation:
• Horizontal vent installation must be power vented (grav-
ity horizontal venting will not work and is not permit-
ted).
• See Fig. 150 for indoor horizontal (powered) vent sys-
tem.
• Vent system must be sized and installed in accordance
with ANSI Z223.1 (NPFA 54). See Table 42.
• Use UL-441 Type B Vent materials.
• Install, maintain and operate the power venter and hori-
zontal vent system in accordance with the instructions of
the horizontal vent system supplier.
• Separated combustion systems are not permitted in mul-
tiple heater assemblies.
Table 42 — Category 1 Vent Diameters
450 TO 750
INPUT RANGE
MBTUH
VENT PIPE ID
10
(in.)
EXTERIOR WALL
LISTED
VENT
HOOD
Fig. 150 — Indoor Horizontal Vent System
ROOF LINE
SEE CATEGORY I
TABLE FOR SIZE
INCREASER/ADAPTOR
SIDE OF RACK SYSTEM
800 TO 1200 1400 TO 2500
MBTUH MBTUH
12 14
POWER VENTER
DRAFT HOOD
OPTIONAL
VENT KIT
DRAIN