Table of Contents
Advertisement
3
General venting
Stainless
steel
connections
1.
Combustion Air Intake Connector (FIG. 3-10) - Used
to provide combustion air directly to the unit from
outdoors. A fitting is provided on the unit for final
connection. Combustion air piping must be supported
per guidelines listed in the National Mechanical Code,
Section 305, Table 305.4 or as local codes dictate.
2.
Vent Connector (FIG. 3-10) -
passageway for conveying combustion gases to the
outside. A transition fitting is provided on the unit for
final connection. Vent piping must be supported per the
National Building Code, Section 305, Table 305.4 or as
local codes dictate.
Figure 3-10 Near Boiler Stainless Steel Venting
VENT
The Knight wall mount boiler uses model specific
combustion air intake and vent piping sizes as detailed in
Table 3C below.
Increasing or decreasing the size of the
NOTICE
combustion air or vent piping beyond the
sizes listed in Table 3C is not authorized.
Maximum allowable combustion air and
vent piping lengths are as follows:
Table 3C Maximum Combustion Air and Vent Piping
Lengths
Model
2" Max Vent/Air
51
40 feet
81
40 feet
106
40 feet
151
N/A
211
N/A
(continued)
air
intake/vent
Used to provide a
3" S.S. INTERMEDIATE
(FOR SAF-T VENT ONLY)
3" S.S. ADAPTER
3" Max Vent/Air
100 feet
100 feet
100 feet
100 feet
100 feet
Installation & Operation Manual
For 2" vent / air lengths greater than 40 feet,
NOTICE
consult the factory.
Note: The minimum combustion air and vent piping length is
12 equivalent feet.
When determining equivalent combustion air and vent length,
add 5 feet for each 90° elbow, 3 feet for each 45° elbow, and 3 feet
for the concentric vent kit, see example below.
EXAMPLE: 20 feet of PVC pipe + (4) 90° elbows + (2) 45°
elbows + (1) concentric vent kit = 49 equivalent feet of piping.
Removing from existing vent
Follow the instructions in Section 1, page 11 of this manual
when removing a boiler from an existing vent system.
Vent and air piping
Vent and air system:
Installation
NOTICE
requirements and with the National Fuel Gas
Code, ANSI Z223.1 for U.S. installations or
CSA B149.1 for Canadian installations.
You must also install air piping from outside to the boiler air
intake adapter. The resultant installation is direct vent (sealed
combustion).
You may use any of the vent/air piping methods covered in this
manual. Do not attempt to install the Knight wall mount boiler
using any other means.
DO NOT mix components from different
WARNING
systems. The vent system could fail, causing
leakage of flue products into the living space.
Use only approved stainless steel, PVC or
CPVC pipe and fittings. For PVC/CPVC use
with primer and cement specifically
designed for the material used.
Vent, air piping and termination:
The Knight wall mount boiler vent and air piping can be
installed through the roof or through a sidewall. Follow the
procedures in this manual for the method chosen. Refer to the
information in this manual to determine acceptable vent and air
piping length.
must
comply
with
local
19
Hide quick links:
Advertisement
Table of Contents
