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•
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
450 TO 750
INPUT RANGE
MBTUH
VENT PIPE ID (in.)
10
EXTERIOR WALL
LISTED
VENT
HOOD
Fig. 158 — Indoor Horizontal Vent System
Energy Recovery Ventilation (ERV) Sections
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.
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.
800 TO 1200
1400 TO 2500
MBTUH
MBTUH
12
14
POWER VENTER
DRAFT HOOD
OPTIONAL
VENT KIT
DRAIN
CAUTION
VERIFY FACTORY
APPLICATION OF
SEALANT/CAULKING
INSTALLER SHALL ADD
CAULK/SEALANT AT THIS
LOCATION BETWEEN
BASERAIL AND ROOF CAP
Fig. 159 — Verify Seals (6 in. baserail shown)
ERV Arrangement
Verify that caulk/sealant is applied at the ends of stacked baserails
which connect to a frame as shown in Fig. 160.
Fig. 160 — ERV Arrangement Sealant
ERV - Lower Level Sections
Verify that top perimeters of lower level shipping pieces have gas-
kets installed as shown in Fig. 161.
198
VERIFY FACTORY
APPLICATION OF
SEALANT/CAULKING
ROOF CAP
APPLY
CAULK/
SEALANT
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