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103448-10- 6/18
IV. Venting
A. General Guidelines
A. General Guidelines
1. Listed Vent/Combustion Air Systems
a. Install vent system in accordance with “Venting of Equipment” of the
National Fuel Gas Code
,
ANSI
Z223.1/NFPA 54 or “Venting Systems and Air Supply for Appliances” of the
Natural Gas and Propane
Installation Code
,
CAN/CSA B149.1, or applicable provisions of local building codes. Contact local
building or fire officials about restrictions and installation inspection in your area.
b. The Alpine is a Direct Vent (sealed combustion) boiler. Install vent system in accordance to these
instructions. Combustion air must be supplied directly to the burner enclosure from outdoors and flue
gases must be vented directly outdoors.
c. The following combustion air/vent system options are listed for use with the Alpine boilers (refer to Table
4):
i.
Two-Pipe CPVC/PVC Vent/Combustion Air System - Separate CPVC/PVC pipe serves to expel products
of combustion and separate PVC pipe delivers fresh outdoor combustion air. Refer to Part B for
specific details.
ii
.
Two-Pipe Polypropylene Vent/Combustion Air System - Separate rigid or flexible polypropylene pipe
serves to expel products of combustion and separate rigid polypropylene or PVC pipe delivers fresh
outdoor combustion air. Refer to Part C for specific details.
iii
.
Two-Pipe Stainless Steel Vent/Combustion Air System - Separate stainless steel pipe serves to expel
products of combustion and separate PVC or galvanized steel pipe delivers fresh outdoor combustion
air. Refer to Part D for specific details.
d. Vent connectors serving appliances vented by natural draft shall not be connected into any portion of
mechanical draft systems under positive pressure.
2. Vent/Combustion Air Piping
a. Do not exceed maximum vent/combustion air lengths listed in Table 5A. Vent/combustion air length
restrictions are based on equivalent length of vent/combustion air pipe (total length of straight pipe plus
equivalent length of fittings). Table 6A lists equivalent lengths for fittings. Do not include vent/combustion
air terminals in equivalent feet calculations. Use vent/combustion air equivalent length worksheet provided
in Table 6B.
b. Maintain minimum clearance to combustible materials. See Figure 2A or 2B for details.
c. Enclose vent passing through occupied or unoccupied spaces above boiler with material having a fire
resistance rating at least equal to the rating of adjoining floor or ceiling.
Note:
For one or two family dwellings, fire resistance rating requirement may not need to be met, but is
recommended.
d. Slope horizontal vent pipe minimum 1/4 in/ft (21 mm/m) downward towards the boiler.
Les chaudières de catégories I, II et IV doivent présenter des tronçons horizontaux dont la pente montante
est d’au moins 1/4 po par pied (21 mm/m) entre la chaudière et l’évent.
e. If possible, slope horizontal combustion air pipe minimum 1/4 in/ft (21 mm/m) downward towards terminal.
If not, slope towards boiler.
f. Use noncombustible ¾ in. pipe strap to support horizontal runs and maintain vent location and slope
while preventing sags in pipe. Do not restrict thermal expansion or movement of vent system. Maximum
support spacing is 4 ft. (1.2 m). Avoid low spots where condensate may pool. Do not penetrate any part
of the vent system with fasteners.
Les instructions d´installation du système d´évacuation doivent préciser que les sections horizontales
doivent être supportées pour prévenir le fléchissement. Les méthodes et les intervalles de support
doivent être spécifiés. Les instructions divent aussi indiquer les renseignements suivants:les chaudières
de catégories II et IV doivent être installées de façon à empêcher l´accumulation de condensat: et si
nécessaire, les chaudières de catégories II et IV doivent être pourvues de dispositifs d´évacuation du
condensat.
g. For multiple boiler installations with vertical roof terminals, separate vent pipes from multiple boilers may
be piped through a common conduit or chase so that one roof penetration may be made.
Содержание Alpine ALP080B
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Страница 148: ...148 103448 10 6 18 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 1 888 432 8887 www usboiler net...
