P/N 42-9540 11/12 Copyright 2012 Hydrotherm
Page 10
KN INSTALLATION INSTRUCTIONS FOR VENT AND AIR PIPING
Vent piped through the roof
(air piped through side wall)
(continued)
2
Figure 6
Minimum clearances to air termination
Figure 7
Using external piping to raise the termination
❑
Termination assembly components:
A.
Wall thimble
— Use only the thimble listed in Table 2. Th e hole in the
thimble will prevent the pipe length (
B
) from being pushed inward. Th e
raised portion of the pipe female end is too large to pass through the hole in
the thimble. Follow the vent pipe manufacturer’s instructions supplied with
the thimble. If the wall thimble isn’t long enough for the application, follow the
vent manufacturer’s instructions to add an extension.
Alternate construction
— Th e air pipe can be inserted through a hole
without using a thimble. For this option,
attach a storm collar on both the
inside and outside walls at the penetration
. Before att aching the collars,
seal around the air pipe thoroughly with silicone RTV to prevent air leakage
or insect access. Th e storm collar tightens around the vent pipe with a gear
clamp. Th is prevents movement of the fi nished assembly. You will still need to
use the length of vent pipe and the termination elbow described below.
B. Length of vent pipe
— Use a 1-foot length of vent pipe as listed in Table 2
unless the wall penetration requires a longer length. If a longer length is
required, use a length of EZ-Seal long enough for the application.
Insert the pipe from OUTSIDE, male end fi rst. Th e pipe will stop at the raised
section of the female end.
C. Gear
clamp
— Use a hose clamp or a gear clamp manufactured by the vent
manufacturer (see Table 2).
Slide the clamp over the male end of the pipe aft er the pipe has been inserted
from outside.
From the inside, pull the pipe so it is fi rmly against the outside plate.
Push the gear clamp against the inside plate and tighten securely. Th is will
prevent the termination assembly from being pushed outward.
D. Termination
elbow
— Use only the termination elbow listed in Table 2. Th e
elbow must be pointed downward.
Before inserting the male end of the elbow into the pipe, apply a bead of
silicone RTV and spread around the end.
Insert the termination elbow and secure using the vent pipe manufacturer’s
joint assembly procedure.
Termination location — Install the air pipe termination where it meets the
minimum clearances shown in Figure 6.
Appliance exhaust outlets — Install the air intake at least 2 feet below and 5
feet horizontally from any appliance vent outlet.
Exiting below grade or minimum height
— See Figure 7. When the air
pipe must exit the building below grade or below the minimum height for
the termination elbow, install vertical piping as necessary for the termination
elbow to be high enough to meet the minimum clearances of Figure 6. Make
sure to support the piping using wall brackets available from the vent pipe
manufacturer.
Multiple boiler installations
Venting multiple boilers
❑
Install multiple vents through the roof following all guidelines for single-vent
installations.
❑
Install the vents so they are no closer than 12 inches on centers.
Air piping for multiple boilers
❑
Air for each boiler must be individually piped.
DO NOT
use
combined air piping.
❑
Install multiple air pipes through the side wall following all
guidelines for single-air pipe installations.
❑
Install the terminations so they are no closer than 12 inches
on centers.
