GBT A2-035, Инструкция по установке и эксплуатации

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subsequent supports after every additional 6 feet. The support must be secured using at least #10
fasteners to a solid material (solid masonry or wood framing or blocking). Do not fasten to drywall
sheathing using hollow wall anchors. As an alternative, a threaded rod and trapeze support in
accordance with SMACNA HVAC Construction Standards – Metal and Flexible, latest edition, shall be
installed every 6 feet of continuous horizontal vent and after any offset elbows.
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Install an approved cap for the stack outlet. The bottom of the cap must be one stack diameter above
the top of the stack and so designed to prevent snow or any debris from blocking the vent. The top of
the stack must be carried to a minimum of two feet above the highest point of the roof or any other
obstructions within 8 feet (2.4 meter) of the termination. The vent must not terminate near an air supply
inlet to any building.
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The venting system must be planned so as to avoid possible contact with concealed plumbing or
electrical wiring inside the walls.
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Venting in a multi-family structure must be enclosed when passing through occupied or unoccupied
spaces above the connected boiler. The enclosure is to be of materials no less fire resistant than
surrounding floors and walls. It is recommended that the system be enclosed whenever passing through
occupied spaces. Be sure to check your local building codes for additional requirements.
•
Minimum clearance of 4 feet (1.2 meter) (6 feet or 1.8 meter in Canada) horizontally must be maintained
between the unit and vent stack from electric meters, gas meters, regulators and relief equipment (no
part of the unit or venting may be directly above or below electric meters, gas meters, or regulators).
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A vertical support must be installed at least twice in any continuous vertical run, or every 10 feet. Install
a Vent Roof Jack Assembly or Fire stop Plate at every penetration of a floor or ceiling.
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Roof Line: The vent system must terminate at least 3 feet (0.9 meter) and no more than 6 feet (1.8
meter) above the roof line, and no closer than 8 feet (2.4 meter) from any wall or vertical structure.
Vents extending above the roof more than 5 feet (1.5 meter) should be secured using guy wires or
braces to withstand wind or snow loads.
These units are engineered for natural draft and may not be connected into any
portion of a mechanical or other draft system operating under positive pressure.
Verify that the venting is under negative pressure when all boiler room doors are
closed, the heater/boiler is firing, and all other air using appliances in the room are operating. If the
venting is under positive pressure during operation a draft inducer must be installed, vent material
suitable for positive pressure must be installed and all joints must be sealed.
Common Vent System:
Manifolds that connect more than one heater/boiler to a common chimney must be
sized to handle the combined load. At no time should the area of the common vent be less than the area of the
largest heater/boiler exhaust outlet.
Common vent systems may be too large if an existing unit is removed. When an
existing appliance is removed, the vent system design must be carefully evaluated
for proper sizing (Refer to MAINTENANCE Section of this manual).