Vertical Termination - Optional Concentric Vent - Lochinvar 400 Installation & Operation Manual

5
Vertical direct venting
Vertical termination – optional concentric vent: Models 400 - 601 Only
Do not operate the appliance with the rain
WARNING
cap removed
combustion products may occur. Water
may also collect inside the larger
combustion air pipe and flow to the
burner enclosure. Failure to follow this
warning could result in product damage
or improper operation, personal injury, or
death.
4. Install the Y concentric fitting pipe assembly up through
the structure's hole and field supplied roof boot/flashing.
Do not allow insulation or other materials
NOTICE
to accumulate inside the pipe assembly
when installing through the hole.
5. Secure the assembly to the roof structure as shown below
in FIG. 5-6 using field supplied metal strapping or
equivalent support material.
Figure 5-6 Concentric Vent Roof Installation
VENT
COMBUSTION
AIR
ROOF BOOT /
FLASHING
(FIELD SUPPLIED)
VENT
Ensure termination height is above the
NOTICE
roof surface or anticipated snow level
(12 inches (305 mm) in U.S.A. or 18
inches (457 mm) in Canada) as shown in
FIG. 5-4, page 32.
If assembly is too short to meet height
NOTICE
requirement, the two (2) pipes supplied in
the kit may be replaced by using the same
diameter, field supplied standard schedule
40 PVC for CVK3007. Do not extend
dimension D* more than
(1524 mm) (see FIG. 4-9, page 28).
or recirculation
12" (305 MM) (18" (457 MM) FOR CANADA)
MINIMUM CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL. MAXIMUM OF
24" (610 MM) ABOVE ROOF.
SUPPORT
(FIELD SUPPLIED)
ELBOW
(FIELD SUPPLIED)
COMBUSTION
AIR
60 inches
Installation & Operation Manual
(continued)
DO NOT use field-supplied couplings to
CAUTION
of
extend pipes.
occur.
6. Install the rain cap and the small diameter pipe assembly
into the roof penetration assembly. Ensure the small
diameter pipe is fastened tightly into the rubber adapter
for #CVK3007 installations.
7. Cement the appliance combustion air and vent pipes to
the concentric vent termination assembly. See FIG. 5-6
for proper pipe attachment.
8. Operate the appliance through one (1) heat cycle to
ensure combustion air and vent pipes are properly
connected to the concentric vent termination
connections.
Multiventing vertical terminations
When two (2) or more direct vent appliances are vented near
each other, each appliance must be individually vented (see
FIG. 5-7). NEVER common vent or breach vent this
appliance. When two (2) or more direct vent appliances are
vented near each other, two (2) vent terminations may be
installed as shown in FIG. 5-7. It is important that vent
terminations be made as shown to avoid recirculation of flue
gases.
Figure 5-7 Concentric Vent and Combustion Air Vertical
Termination
12" (18" FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24" ABOVE ROOF.
Airflow restriction will
12"
MINIMUM
COMBUSTION
AIR (TYPICAL)
33