Dunkirk DMG-240 Installation, Operation & Maintenance Manual page 24

Condensing gas fired boiler
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C. Mechanical Fastener Instructions - See Figure 6-5
Manufacturer recommends use of a mechanical fastener at
every push-fit gasket connection when using a polypropylene
vent. Follow vent manufacturer instructions or, if unavailable,
below when installing mechanical fasterner:
• Take dual flue mechanical fastener with larger hole in it and
place it onto male end of pipe.
• Slide clamp all the way down the pipe with smaller opening
of clamp towards female end of the pipe.
• Bend clamp over the female end of pipe "A" and slide male
end of pipe "B" through clamp and into female end of pipe
"A".
Mechanical fastener is necessary for dual fuel pipe.
Note
Dual flue spring clamp is for indoor use only and
should not be used in outdoor applications.
6 - COMBUSTION AIR AND VENT PIPING
FIGURE 6-5 - Mechanical Fasterner Connection for
Dual Fuel Pipe
24
P/N 240011656, Rev. E [07/30/2018]

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