Stainless Steel Venting - Burnham Water boiler Installation, Operating And Service Instructions

iV. Venting (continued)
C.

Stainless Steel Venting

CaUTiOn
Vent systems made by Heat Fab, Protech and
Z-Flex rely on gaskets or proper sealing. When
these vent systems are used, take the following
precautions:
• Make sure that gasket is in position and un-
damaged in the female end of the pipe.
• Make sure that both the male and female
pipes are free of damage prior to assembly.
• Only cut vent pipe as permitted by the vent
manufacturer in accordance with their in-
structions. When pipe is cut, cut end must
be square and carefully de-burred prior to
assembly.
WaRning
all condensate that forms in the vent must be
able to drain back to the boiler.
1. Vent Length Restrictions
a. Vent length restrictions are based on equivalent
length of vent/combustion air pipe (total length
of straight pipe plus equivalent length of
fittings). Maximum vent/combustion air lengths
are listed in Table 7. Do not exceed maximum
vent/combustion air lengths. Do not include
vent/combustion air terminals in equivalent
feet calculations. See "Combustion Air/Vent,
Equivalent Length Work Sheet".
b. The vent termination location is restricted as
per 'General Guidelines', Section A.5. (Refer to
Figure 3)
c. Where the use of "silicone" is called for in the
following instructions, use GE RTV 106 or
equivalent for the vent collar. Air inlet piping
sections are sealed with any general-purpose
silicone sealant such as GE RTV102. PVC air
inlet piping sections are connected with PVC
cement.
d. Longitudinal welded seams should not be placed
at the bottom of horizontal sections of exhaust
pipe.
e. Do not drill holes in vent pipe.
f. Do not attempt to mix vent components of
different vent system manufacturers.
Near Boiler Connection
2.
To install the stainless steel vent adapter
[P/N 102219-01 (3"). 102220-01 (4")]:
a. Push the stainless steel vent adapter onto the
CPVC/PVC connector with a slight twisting
motion. Make sure that the stainless steel vent
adapter is inserted at least 1" (refer to Figure 13).
Figure 1: Field installation of Two-Pipe Vent
System adapter for Stainless Steel
b. Secure the adapter to the CPVC/PVC connector
by tightening the metal strap.
System Assembly
3.
a. Plan venting system to avoid possible contact
with plumbing or electrical wires. Start at
vent connector at boiler and work towards vent
termination.
b. Refer to Tables 8A and 8B for approved AL29C
Vent Systems.
c. Do not exceed maximum Vent/Combustion air
length. Refer to Table 7.
d. Follow all manufacturer instructions and
warnings when preparing pipe ends for joining
and using the primer and the cement.
e. Assemble the air intake system using either
galvanized or PVC pipe.
i. If PVC piping is used, use PVC cement
to assemble the PVC intake system
components. See Part B for air intake
installation instructions.
ii. If galvanized piping is used, use at least two
sheet metal screws per joint. Seal the outside
of all joints.
Horizontal Vent Termination
4.
a. Standard Two-Pipe Termination
Refer to Figure 8.
i. Vent Termination
• Use U.S. Boiler stainless exhaust
terminal [P/N 8110701 (3"), or P/N
100184-01 (4")]. The outer edge of this
terminal must be between 6" and 12"
from the surface of the wall.
The joint between the terminal and
the last piece of pipe must be outside
of the building.
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