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Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 27
3) Venter (Flue)
Outlet
Venter Outlet Attachment Requirements:
inches mm
400
6152
800
8203
1200
8203
Mode l
LDAP
Size
Venter Outlet
Diameter
Depending on the size of vent pipe
as determined in Step No. 2, attach
either the vent pipe directly to the
venter collar or a taper-type enlarger.
4) Joints and Sealing
Provide field-supplied vent pipe as specified in Requirement No. 1.
• If using single wall, 26-gauge or heavier galvanized pipe, secure slip-fit connec-
tions using sheetmetal screws or rivets. Seal pipe joints either with tape suitable for
550°F (such as Option FA1, P/N 98266) or high-temperature silicone sealant.
• If using Category III vent pipe, follow pipe manufacturer's instructions for join-
ing pipe sections. When attaching Category III pipe to the venter outlet or the vent
cap, make secure, sealed joints following a procedure that best suits the style of
Category III pipe being used.
• If installing a double-wall (Type B) terminal pipe, follow the instructions in FIG-
URE 17C to join the double-wall pipe to a single-wall or Category III vent pipe
run. To attach the vent cap, follow instructions in FIGURE 17B.
• If using double-wall (Type B) vent pipe in the vent pipe run (at least 75% of the
equivalent vent length must be vertical), follow the pipe manufacturer's instruc-
tions for joining pipe sections. For attaching double-wall pipe to the heater, see
FIGURE 17A. To attach the vent cap, see FIGURE 17B.
FIGURE 17A -
Attaching Double-
Wall (Type-B) Vent
Pipe to the Venter
Outlet
A double-wall pipe
run is allowed only if
at least 75% of the
vent length is vertical.
Figure 17A - STEP 1
To secure the connection,
spaced equal distance around
the pipe, drill and insert three
3/4” long sheetmetal screws
through the pipe and into the
collar. Do not over tighten the
screws.
Venter
Collar
Double-
Wall
Pipe
Slide the
double-wall
pipe over
the collar
so that the
collar is
inside the
inner pipe.
Figure 17A - STEP 2
Figure 17B - STEP 1
Place a continual 3/8” bead of
silicone sealant around the
circumference of the vent cap collar.
This will prevent any water inside
the vent cap from running down the
double-wall pipe.
Figure 17B - STEP 2
Secure the vent cap to the
double-wall pipe by drilling
and inserting a
3/4” long sheetmetal screw
into the vent cap collar. Do
not over tighten screw.
Insert the collar on the vent cap inside the
inner wall of the double-wall pipe. Insert as
far as possible. Add additional silicone sealant
to fully close any gaps between the vent cap
and the double-wall pipe. This is necessary to
prevent water from entering the double-wall
pipe.
Figure 17B - STEP 3
Do STEP 2
immediately
following
STEP 1.
FIGURE 17B - Attaching Double-Wall (Type B) Pipe to a Vent Cap
Taper-type
Pipe
Diameter
Increaser
Airflow
Follow instructions in Requirement No. 4. below to make
the connection for the type of pipe being used.
Fill inside the pipe, around the collar, with
silicone sealant being sure there are no gaps.