190
vent pipe requires custom adapters to ensure leak-free joints. Con
-
tact a venting system manufacturer for availability, if the venting
system was not included with the heating system.
Fig. 156 —
Indoor Venting with Flue Riser Kit
Vertical Vent (Category 1) System Installation
For all indoor rack system vertical vent installations, note the fol
-
lowing for proper installation:
• See Fig. 157 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 piping
• 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 multi
-
ple heater assemblies.
Fig. 157 —
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 (gravity
horizontal venting will not work and is not permitted).
• See Fig. 158 for indoor horizontal (powered) vent system.
• 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 horizon
-
tal vent system in accordance with the instructions of the
horizontal vent system supplier.
• Separated combustion systems are not permitted in multi
-
ple heater assemblies.
Table 42 —
Category 1 Vent Diameters
Fig. 158 —
Indoor Horizontal Vent System
Energy Recovery Ventilation (ERV) Sections
RECEIVING AND INSPECTION
Inspect all sections for freight damage upon receipt. Inspect the
cassette(s) mounted inside the section. The cassette consists of
a frame, wheel assembly and segments. Verify that all wheels
turn freely by hand (clockwise when viewed from the pulley
side). Report any damage immediately to the freight company.
Main AHU
Verify that the gasket is installed between the roof cap and baserail
(both sides). See Fig. 159.
COMBUSTION
AIR INTAKE
LOUVERS
OPTIONAL
VENT KIT
SIDE OF RACK SYSTEM
INCREASER/ADAPTOR
SEE CATEGORY I
TABLE FOR SIZE
OPTIONAL
VENT KIT
MIN. 5 FT
24" MIN.
ROOF LINE
LISTED VENT CAP
DRAIN
INPUT RANGE
450 TO 750
MBTUH
800 TO 1200
MBTUH
1400 TO 2500
MBTUH
VENT PIPE ID (in.)
10
12
14
CAUTION
The assembled sections will result in a unit center of gravity
(CG) higher than the horizontal centerline. Exercise proper
care when rigging, lifting and transporting. Units with a
high CG will tip over more easily during installation than
those with a lower CG.
OPTIONAL
VENT KIT
DRAFT HOOD
POWER VENTER
EXTERIOR WALL
LISTED
VENT
HOOD
DRAIN
