Detroit Radiant Products DST-60N, Руководство по установке, Страница: 15 / 52

15
DST Series
3.0 Installation • General Venting Requirements • Replacing Existing Equipment
Do not
vent this appliance into another heater’s vents or through a masonry chimney.
Do not use dampers in the heater vent pipe.
Single Wall vent pipe must not pass through any unoccupied attic, inside wall, concealed space, or floor.
Un-insulated single wall vent pipe must not be used outdoors for venting appliances in regions where
winter design temperature is below freezing.
WARNING
!
If replacing an existing heater, vents may require re-sizing. Improperly sized venting
systems can result in vent gas leakage or condensation. Refer to the National Fuel Gas
Code ANSI Z223.1 (NFPA 54) or CSA B149.1 - latest edition. Failure to follow these
instructions can result in serious injury or death.
WARNING
!
Replacing Existing Equipment (60,000 BTU/h Models Only)
If the heater is replacing existing equipment and using an existing vent system, inspect the venting for
proper size and horizontal pitch as directed in these instructions and the latest edition of the National Fuel
Gas Code, ANSI Z223.1 (NFPA 54) or CSA B149.1 Installation Code.
Determine that there is not blockage or restriction, leakage, corrosion, or other deficiencies that can cause
hazards. The vent pipe should be corrosion-resistant galvanized steel of a thickness that meets the
National Fuel Gas Code. Minimum thickness for connectors varies depending on the pipe diameter. Never
vent the DST series with PVC or plastic pipe.
• The equivalent length for a 4 inch 90° elbow is 5 feet.
• Avoid using more than two 90° directional changes in the venting system.
• Suspend and secure all horizontal runs at points no greater than 3 feet apart.
• Vent termination must maintain a minimum distance of 6 feet from any mechanical air supply inlet.
• Vent must terminate a minimum of 4 feet below, 4 feet horizontally from, or 1 foot above any window
or door that may be opened or gravity air inlet into the building.
• Vent must terminate a minimum of 4 feet above grade level and must extend beyond any
combustible overhang. Vents adjacent to the public walkways must terminate a minimum of 7 feet
above grade level.
• The vent terminal must be installed to prevent any blockage by snow and protect building material
from degradation by flue gases.
• The vent cap must be a minimum of 6 inches from the sidewall of the building.
• Vent must be a minimum of 36 inches below or extend beyond any combustible overhang.
• Consult NFPA ANSI Z223.1 Gas Vent Termination criteria for vents that terminate on a roof pitch that
exceeds 9:12.
• Clearance to each side of the center line extended above meter/regulator assembly is 3 feet within a
height 15 feet above the meter/regulator assembly.
• Clearance to service regulator vent outlet 3 feet.
• Vent terminal clearances shall be in accordance with Canadian CSA B149.1 Natural Gas and
Propane Installation Code.