16
Figure 4: Location of Vent Terminal Relative to Windows, Doors, Grades, Overhangs, Meters and Forced Air
Inlets - Two-Pipe System Vent Terminal (Shown) Two-Pipe System Air Intake Terminal (Not Shown)
IV. Venting
A. General Guidelines (continued)
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
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.
Table 6A: Vent System and Combustion Air System Components Equivalent Length
vs. Component Nominal Diameter
Vent or Combustion Air System
Component Description
Equivalent Length for Vent or Combustion Air System Component
vs. Component Nominal Diameter
Component Nominal Diameter
3 in. (80 mm)
4 in. (100 mm or 110 mm)
90° Elbow (Short Radius)
10 ft. (3.0 m)
13 ft. (4.0 m)
45° Elbow (Short Radius)
3.0 ft. (0.9 m)
4.5 ft. (1.4 m)
Summary of Contents for Phantom-X PHNTM210
Page 7: ...7 Figure 1B Model PHNTM285 I Product Description Specifications and Dimensional Data continued...
Page 52: ...52 VIII Electrical continued...
Page 53: ...53 VIII Electrical continued Figure 26 Wiring Connections Diagram...
Page 54: ...54 VIII Electrical continued Figure 27 Ladder Diagram...
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