ACV Prestige CPVC, Руководство пользователя

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16
Direct Vent - Horizontal - Sidewall
The installation must conform to the requirements of
the authority having jurisdiction or, in the absence
of such requirements, to the National Fuel Gas
Code, ANSI Z223.1/ NFPA 54, and/or Natural Gas and
Propane Installation Code, CAN/CSA B149.1.
For direct vent (sidewall) installations in the
Commonwealth of Massachusetts, the installer must
comply with the additional requirements outlined on
page 37 and 38.
A gas vent extending through a sidewall should not
terminate near an adjacent wall or below any build-
ing extensions such as roof eaves, balconies or
decks. Failure to comply with the required clear-
ances in this manual could result in severe personal
injury, death or substantial property damage.
To reduce the potential of the combustion air inlet
freezing up it is recommended to separate the vent
and air terminations in both a horizontal and vertical
plain as shown in figures 8 through 12 on pages 17
and 18.
If the vent is terminated on a sidewall which is sub-
ject to high winds it is recommended to terminate
the vent using a 45º elbow or tee. A tee provides the
best protection against wind but can expose the
exterior of the house to condensate, while a 45º
elbow provides improved protection from both wind
and condensate.
The information and diagrams outlining the fittings
and method of terminating the vent/combustion air
are directly related to PVC/CPVC vent systems.
When utilizing and AL29-4C® or Polypropylene vent
system there may be some variations. Consult the
appropriate vent manufacturer for recommenda-
tions and clarifications.
WARNING
NOTICE
BEST PRACTICE
BEST PRACTICE
NOTICE
NOTICE
Determine Termination Location
Locate the vent and combustion air termination using the
following guidelines:
1. The total length of the vent or combustion air piping
must not exceed the limits given in Table 8 on page 8.
DO NOT include the 45º or 90º elbows or tee used to
terminate the combustion air inlet and vent exterior
of the building when determining the total length of
pipe.
2. The combustion air pipe must terminate using a 90 º
elbow directed away from the vent termination. The
combustion air termination must be installed 12” [30.5
cm] minimum above grade / highest anticipated snow
level and as shown in Figs. 8 through 15 pages 17 &
18.
The combustion air termination can be placed on
either side of the vent termination. The vent and
combustion air terminations must be a minimum 12”
[30.5 cm] apart. The vent and combustion air termi-
nations are not required to be in the same pressure
zone. The combustion air termination must be
directed away from the vent see Figs. 10 through 15
pages 17 & 18. The combustion air termination must
be directed down for Figs. 8 and 9 page 17.
3. The vent pipe can terminate:
-
Using a 90º elbow as shown in Figs. 8 or 10, page 17.
- Using coupling as shown in Figs. 9 or 13, pages 17
or 18.
- Using a tee as shown in Figs. 11 or 14, pages 17 or
18.
- Using a 45º elbow as shown in Figs. 12 or 15, page 18.
The vent termination must be installed 12” [30.5 cm]
minimum above grade / highest anticipated snow level.
Do not extend the vent pipe outside the sidewall
beyond the dimensions shown in Figs 8 through 15.
Extended exposure of the vent pipe could cause
condensate to freeze and block the vent pipe.
WARNING
NOTICE
NOTICE
Direct Vent Installation of Vent/Air Piping