Step 9 - Install Duct Connections - Bryant 582A Series Installation, Start-Up And Service Instructions Manual

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CAUTION: Unstable operation may occur when the
gas valve and manifold assembly are forced out of po-
sition while connecting improperly-routed rigid gas pip-
ing to the gas valve. Use a backup wrench when mak-
ing connection to avoid strain on, or distortion of, the
gas control piping.
CAUTION: If a flexible conductor is required or al-
lowed by the authority having jurisdiction, black iron
pipe shall be installed at the gas valve and shall ex-
tend a minimum of 2 in. outside the unit casing.
WARNING: Never use a match or other open flame
when checking for gas leaks. Never purge gas line into
combustion chamber. Failure to follow this warning could
result in an explosion causing personal injury or death.
8. Check for gas leaks at the field-installed and factory-
installed gas lines after all piping connections have been
completed. Use soap-and-water solution (or method speci-
fied by local codes and/or regulations).
Fig. 8 — Sediment Trap
IX. STEP 9 — INSTALL DUCT CONNECTIONS
The unit has duct flanges on the supply- and return-air open-
ings on the side and bottom of the unit. For downshot appli-
cations the ductwork connects to the roof curb. See Fig. 2 and
3 for connection sizes and locations.
A. Configuring Units for Downflow (Vertical) Discharge
WARNING: Before performing service or mainte-
nance operations on the system, turn off main power to
unit or electrical shock could result.
1. Open all electrical disconnects before starting any serv-
ice work.
2. Remove return duct cover located on duct panel by break-
ing connecting tabs with screwdriver and a hammer
(Fig. 9).
3. To remove supply duct cover, break front and right side
connecting tabs with a screwdriver and a hammer. Push
louver down to break rear and left side tabs (Fig. 10).
4. If unit ductwork is to be attached to vertical opening
flanges on the unit basepan (jackstand applications only),
do so at this time.
CAUTION: Collect ALL screws that were removed.
Do not leave screws on rooftop as permanent damage
to the roof may occur.
5. It is recommended that the basepan insulation around
the perimeter of the vertical return-air opening be
secured to the basepan with aluminum tape. Applicable
local codes may require aluminum tape to prevent
exposed fiberglass.
6. Cover both horizontal duct openings with the duct cov-
ers from the accessory duct cover kit. Ensure opening is
air- and watertight.
7. After completing unit conversion, perform all safety checks
and power up unit.
NOTE: The design and installation of the duct system must
be in accordance with the standards of the NFPA for instal-
lation of nonresidence-type air conditioning and ventilating
systems, NFPA 90A or residence-type, NFPA 90B; and/or lo-
cal codes and residence-type, NFPA 90B; and/or local codes
and ordinances.
Adhere to the following criteria when selecting, sizing,
and installing the duct system:
1. Units are shipped for side shot installation.
2. Select and size ductwork, supply-air registers, and
return-air grilles according to American Society of
Heating, Refrigeration and Air Conditioning Engineers
(ASHRAE) recommendations.
3. Use flexible transition between rigid ductwork and unit
to prevent transmission of vibration. The transition may
be screwed or bolted to duct flanges. Use suitable gas-
kets to ensure weathertight and airtight seal.
4. All units must have field-supplied filters or accessory fil-
ter rack installed in the return-air side of the unit. Rec-
ommended sizes for filters are shown in Tables 1 and 2.
5. Size all ductwork for maximum required airflow (either
heating or cooling) for unit being installed. Avoid abrupt
duct size increases or decreases or performance may be
affected.
6. Adequately insulate and weatherproof all ductwork
located outdoors. Insulate ducts passing through uncon-
ditioned space, and use vapor barrier in accordance with
latest issue of Sheet Metal and Air Conditioning
Contractors National Association (SMACNA) and Air
Conditioning Contractors of America (ACCA) minimum
installation standards for heating and air conditioning
systems. Secure all ducts to building structure.
7. Flash, weatherproof, and vibration-isolate all openings
in building structure in accordance with local codes and
good building practices.
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