3
LNX15-574.2
Kit Installation Instructions
(For Non-Condensing Models)
4. Assemble the extended vent kit assembly (tee, tee cap,
vent pipe, vent pipe clamp support bracket, and vent cap)
as shown in Figure 3.3. Note the following:
•
Do not tighten the vent extension support bracket(s)
yet. That will be tightened in a later step.
•
While most B-vent components lock together when
joined, it is recommended that the joints also be
secured with the sheet metal screws provided. Drill (3)
1/8” pilot holes around the circumference of each joint
and secure with the included screws.
1. Remove the standard power exhaust vent terminal(s) from
the unit casing by removing the sheet metal mounting
screws. Refer to Figure 3.1.
2. Remove any remaining caulk that is on the casing from
removing the vent terminal(s).
3. Mount the extended vent collar(s) and collar gasket(s)
to the casing using (4) self-tapping sheet metal screws
included for each collar. The collar(s) should be centered
over the gas furnace vent outlet opening(s) so as to not
block any portion of the vent outlet opening(s). Refer to
Figure 3.2.
EXTENDED VENT KIT INSTALLATION -
NON-CONDENSING
THIS SECTION APPLIES TO ONLY KITS FOR
NON-CONDENSING FURNACE OPTIONS.
REVIEW THE INFORMATION ON PAGE 2
TO CONFIRM THE PROPER KIT. IF THE KIT
TO BE INSTALLED IS FOR A CONDENSING
FURNACE, PROCEED TO PAGE 4.
REVIEW BEFORE PROCEEDING
Gas Furnace
Vent Outlet
Remove vent terminal(s).
- B-Cabinet units have one terminal
- C-Cabinet units have two terminals
- D-Cabinet units have two or four terminals
Figure 3.1
Remove Standard Power Exhaust Vent Terminal(s)
Gas Furnace
Vent Outlet
(4) Screws for each Vent Collar
- B-Cabinet units have one collar
- C-Cabinet units have two collars
- D-Cabinet units have two or four collars
Include Gasket between
Vent Collar and unit casing
Side view showing
collars centered on
outlet openings
Figure 3.2 – Extended Vent Flue Collar Installation
Installed Extended Vent Kit(s)
- B-Cabinet units have one
- C-Cabinet units have two
- D-Cabinet units have two or four
Vent Extension
Support Brackets
Figure 3.3 – Extended Vent Kit Installed
5. Place a bead of high temperature RTV caulk (by others)
around the exhaust collar where it will mate with the vent
kit tee. Fit the extended vent kit assembly to the exhaust
collar installed on the unit casing, as shown in Figure 3.3.
Verify that the vent assembly is vertically plumb. Drill (3)
1/8" diameter bite holes through the tee and into the flue
collar, equally spaced around the circumference of the tee.
Using (3) sheet metal screws provided, securely fasten the
tee to the collar.
6. Position the extended vent support bracket on the unit
casing, several inches below the bottom edge of the roof
panel. Drill (2) 1/8" diameter bite holes through the casing
panel and fasten the bracket using the sheet metal screws
provided.
7. Attach the vent pipe clamp support bracket to the extended
vent support bracket with (2) self-tapping sheet metal
screws.
8. With the brackets secured, tighten the clamp around the
vent pipe. Drill (3) 1/8" diameter bite holes through the
vent pipe and into the tee. Equally space the holes around
the circumference of the vent pipe. Using (3) sheet metal
screws, securely fasten the vent pipe to the tee.
9. Caulk the joint around the exhaust collar where it attaches
to the unit casing with high temperature RTV caulk (by
others).
10. The installation is complete.
