U.S. Boiler Company Alpine ALP500C, Installation, Operating And Service Instructions

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iV. Venting
A. General Guidelines (continued)
b. Maintain minimum clearance to combustible
materials. See Table 5 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 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
Figure 7: Direct Vent - Sidewall Standard Terminations
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.
3. Vent/Combustion Air Terminals
Install venting system components on exterior
of building only as specifically required by these
instructions (refer to Figure 6).
a. Use only listed vent/combustion air terminals.
i.
Horizontal Sidewall Venting: Use coupling
for vent and 90° elbow pointed down for
combustion air as shown in Figure 7 or
Figure 8. If using room air for combustion,
use 90° elbow or tee for vent. Alternate low
profile termination is shown in Figure 9.