Granby Cast Iron Boiler Series, Инструкция по установке, эксплуатации и обслуживанию

Страница: 19 / 34

19
6.0 CHIMNEY INFORMATION
Natural Draft Applications
CAUTION: Oil fired units must always be connected to flues with sufficient draft.
Specific guidelines should be followed to prevent the occurrence of the following conditions:
•
Reverse flow of flue gas during or after burner shutdown.
•
Positive outlet draft conditions.
•
Condensation of flue gasses
•
Damage to masonry chimney
Chimney Connection
To insure safe and efficient boiler operation flue gasses must be released through a clean,
properly sized chimney with adequate draft that meets all local codes and regulations and be in
accordance with CSA B139, NFPA31, NFPA211 and local regulations. Always inspect and clean
the chimney to ensure that it is free from obstructions. Never connect the boiler to a chimney or
liner serving an open fireplace.
A 5” diameter flue pipe must be used for connection of the 3,4,5, section boiler flue outlet to the
chimney for the entire length of the connection. A 6” diameter flue pipe must be used for
connection of the 6,7,8,9, section boiler flue outlet to the chimney for the entire length of the
connection. The chimney connector must be made with the proper gauge thickness and diameter
of fluepipe as required by CSA B139, NFPA31, NFPA211, and local codes, be properly
supported and use as few 90 degree turns as possible. The distance between the boiler and the
chimney depends on whether or not elbows are used. The distance should be at least 24” if no
elbows are used and 12” if elbows are used. The same holds true for the maximum length of the
flue pipe. It must be no longer than 10’ if no elbows are used and 6’ if elbows are used.
Drafts in excess of -0.015” w.c. will require the installation of a barometric damper.
Condensation
The Conforto boiler series is a high efficiency boiler and as a result improper venting can lead to
condensing temperatures in the chimney connector and the venting system. If condensing
temperatures of below 325 Degrees F are reached in the chimney connector, then additional
steps to ensure proper draft must be taken. Make sure that all joints are properly sealed with a
high temperature silicone or mastic. If after sealing the joints the condition still exists, then
inspect the chimney for suitability. If the masonry, brick, block chimney or tile chimney liner is in
poor condition a new chimney liner rated for oil may have to be installed. In the event the
condition still exists after installation of a new liner consult Granby.