Air Ducts; Gas Piping - Carrier 59SC6A Installation Instructions Manual

59SC6A: Installation, Start-up, Operating and Service and Maintenance Instructions

AIR DUCTS

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Many states, provinces and localities are considering or have
implemented standards and/or restrictions on duct sizing practices,
ductwork leakage, and/or ductwork thermal, airflow and electrical
efficiencies. CONSULT LOCAL CODE OFFICIALS for ductwork
design and performance requirements in your area.
General Requirements
The duct system should be designed and sized according to accepted
national standards such as those published by: Air Conditioning
Contractors Association (ACCA Manual D), Sheet Metal and Air
Conditioning Contractors National Association
American Society of Heating, Refrigerating and Air Conditioning
Engineers (ASHRAE) or consult The Air Systems Design Guidelines
reference tables available from your local distributor. The duct system
should be sized to handle the required system design CFM at the design
external static pressure. The furnace airflow rates are provided in
Table 18-Air Delivery-CFM (with filter). When a furnace is installed so
that the supply ducts carry air circulated by the furnace to areas outside
the space containing the furnace, the return air shall also be handled by
duct(s) sealed to the furnace casing and terminating outside the space
containing the furnace.
Secure ductwork with proper fasteners for type of ductwork used. Seal
supply- and return-duct connections to furnace with code approved tape
or duct sealer.
NOTE: Flexible connections should be used between ductwork and
furnace to prevent transmission of vibration.
Ductwork passing through unconditioned space should be insulated to
enhance system performance. When air conditioning is used, a vapor
barrier is recommended.
Maintain a 1-in. (25 mm) clearance from combustible materials to
supply air ductwork for a distance of 36-in. (914 mm) horizontally from
the furnace. See NFPA 90B or local code for further requirements.
Return Duct Sizing
Refer to the Filter Selection and Duct Sizing section for information on
the proper selection of filter sizes and the associated ductwork and duct
transitions. Improperly designed filtering systems and return ductwork
are the most common causes of airflow and/or noise complaints in
HVAC systems.
Ductwork Acoustical Treatment
NOTE: Metal duct systems that do not have a 90 degree elbow and 10
ft. (3 M) of main duct to the first branch take-off may require internal
acoustical lining. As an alternative, fibrous ductwork may be used if
constructed and installed in accordance with the latest edition of
SMACNA construction standard on fibrous glass ducts. Both acoustical
lining and fibrous ductwork shall comply with NFPA 90B as tested by
UL Standard 181 for Class 1 Rigid air ducts.
NOTE: For horizontal applications, the top most flange may be bent
past 90° to allow the evaporator coil to hang on the flange temporarily
while the remaining attachment and sealing of the coil are performed.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
NOTICE
(SMACNA)

GAS PIPING

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FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Never purge a gas line into a combustion chamber. Never test for gas
leaks with an open flame. Use a commercially available soap solution
made specifically for the detection of leaks to check all connections. A
fire or explosion may result causing property damage, personal injury
or loss of life.
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or
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Use proper length of pipe to avoid stress on gas control manifold and
gas valve.
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FIRE OR EXPLOSION HAZARD
Gas valve inlet and/or inlet pipe must remain capped until gas supply
line is permanently installed to protect the valve from moisture and
debris. Also, install a sediment trap in the gas supply piping at the inlet
to the gas valve.
Gas piping must be installed in accordance with national and local
codes. Refer to current edition of NFPA 54/ANSI Z223.1 in the U.S.A.
Refer to current edition of NSCNGPIC in Canada.
Installations must be made in accordance with all authorities having
jurisdiction. If possible, the gas supply line should be a separate line
running directly from meter to furnace.
NOTE: Use a back-up wrench on the inlet of the gas valve when
connecting the gas line to the gas valve.
FURNACE DAMAGE HAZARD
Failure to follow this caution may result in furnace damage.
Connect gas pipe to furnace using a backup wrench to avoid damaging
gas controls and burner misalignment.
In the state of Massachusetts:
1. Gas supply connections MUST be performed by a licensed plumber
or gas fitter.
2. When flexible connectors are used, the maximum length shall not
exceed 36 in. (915 mm).
3. When lever handle type manual equipment shutoff valves are used,
they shall be T-handle valves.
4. The use of copper tubing for gas piping is NOT approved by the state
of Massachusetts.
The gas supply pressure shall be within the maximum and minimum
inlet supply pressures marked on the rating plate with the furnace
burners ON and OFF.
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WARNING
WARNING
WARNING
CAUTION
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NOTICE
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