32
-Vent length and No. of Elbows-
This is a Category III appliance and must be vented accordingly. The vent system must be sealed
airtig
ht.
All seams and joints
without gaskets
must be sealed with high heat resistant silicone sealant or UL listed
aluminum adhesive tape having a minimum temperature ra
ting
of 350 °F (177 °C). For best results, a vent
system should be as short and straight as possible.
Vent type
Diameter
Max. No. of Elbows
Intake**
3 in. (76 mm)
6**
Max. V
erti
cal and Horizontal (Total) Vent Length
60
ft.
(18.3 m )*
Exhaust
4 in. (102 mm)
5
55
ft.
(16.8 m )*
• This boiler is a Category III appliance and must be vented accordingly with any 4 in. (102
mm) vent approved for use with Category III or Special BH type gas vent.
•
Follow the vent pipe manufacturer’s ins
tructions
when installing the vent pipe.
•
Do not common vent this appliance with any other vented appliance.
(Do not terminate vent
into a chimney. If the vent must go through the chimney, the vent must run all the way through
the chimney with Category III approved or Special BH vent pipe.)
• When the horizontal vent run exceeds 5
ft.
(1.5 m), support the vent run at 3
ft.
(0.9 m) intervals
with overhead hangers.
• The maximum length of exhaust vent piping must not exceed
60
ft.
(18.3 m)
.* Deduct 5
ft.
(1.5 m) for each 90° elbow used in the ven
ting
system. Do not use more than
6 elbows
. A 45°
elbow is equivalent to 2.5
ft.
of vent length.
Vent type
Diameter
*For each 90° elbow added, deduct 5
ft.
(1.5m) from max. vent length.
**For Intake vent, refer to the above table of the installa
tion
of 6 elbows and 60
ft.
Max. No. of Elbows
Intake
3 in. (76 mm)
6
Max. V
erti
cal and Horizontal (Total) Vent Length
60
ft.
(18.3 m )*
Exhaust
6
4 in. (102 mm)
60
ft.
(18.3 m )*
*For each 90° elbow added, deduct 5
ft.
(1.5m) from max. vent length.
No. of Elbows
No. of Elbows
Max. V
erti
cal or Horizontal
Vent Length
0
60
ft.
(18.3m)
4
Max. V
erti
cal or Horizontal
Vent Length
40
ft.
(12.2 m)
1
55
ft.
(16.8 m)
5
35
ft.
(10.7 m)
2
50
ft.
(15.2 m)
6
30
ft.
(9.1 m)
3
45
ft.
(13.7 m)
No. of Elbows
No. of Elbows
Max. V
erti
cal or Horizontal
Vent Length
0
55
ft.
(16.8 m)
3
Max. V
erti
cal or Horizontal
Vent Length
40
ft.
(12.2 m)
1
50
ft.
(15.2 m)
4
35
ft.
(10.7 m)
2
45
ft.
(13.7 m)
5
30
ft.
(9.1 m)
Excludes sidewall termina
tion.
Excludes elbow termina
tion,
rain caps, or the 4 in. (102 mm) Concentric termina
tion.
Installa
tion
with vent termina
tion
kit
*If vent termina
tion
kit
is used in the installa
tion,
the maximun length of
exhaust
vent
pipe must not exceed
55
ft.
(16.8 m)
, and the vent run must not exceed 5 elbows. Vent termina
tion
kit
also has
specific
DIP switch se
ttings.
Standard Vent Termina
tions
Summary of Contents for Smart 115 PLUS
Page 49: ...49 Boiler Notes ...
