Lochinvar 399 operation manual Multiventing vertical terminations, Mm see -9

Installation & Operation Manual

5Vertical direct venting (continued)

Vertical termination – optional concentric vent: Models 399 - 600 Only

￿WARNING

Do not operate the appliance with the rain cap removed or recirculation of 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.

CAUTION	DO NOT use field-supplied couplings to
	extend pipes. Airflow restriction will
	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

4.Install the Y concentric fitting pipe assembly up through the structure’s hole and field supplied roof boot/flashing.

NOTICE	Do not allow insulation or other materials
	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 5-6Concentric Vent Roof Installation

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

COMBUSTION

AIR

ROOF BOOT / FLASHING (FIELD SUPPLIED)

VENT

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)

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. The next two (2) terminations must be at least 36 inches (914 mm) away from the first two

(2)terminations. It is important that vent terminations be made as shown to avoid recirculation of flue gases. Dimension A in FIG. 5-7 represents the distance between pipes or rain shields, as touching or a 2 inch (51 mm) maximum separation.

Figure 5-7Concentric Vent and Combustion Air Vertical Termination (Dimension A as Touching or 2 inches (51 mm) Maximum Separation)

"A"

VENT	COMBUSTION
	AIR

NOTICE	Ensure termination height is above the
	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

36" (914 MM)

MIN.

VENT (TYP)

COMBUSTION AIR (TYPICAL)

diameter, field supplied standard schedule

40 PVC for CVK3007. Do not extend

dimension D* more than 60 inches

(1524 mm) (see FIG. 4-9, page 28).

12" (305 MM) (18" (457 MM)
FOR CANADA) MINIMUM	DIMENSTION "A" IS TOUCHING
CLEARANCE ABOVE	OR 2" (51 MM) MAXIMUM
HIGHEST ANTICIPATED	SEPARATION
SNOW LEVEL. MAXIMUM OF
24" (610 MM) ABOVE ROOF.

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