Monessen Hearth SBV500 Combustion Air Assembly, MODEL OAC-4COMBUSTION AIR ASSEM- BLY, 62D4036

COMBUSTION AIR ASSEMBLY BBV, SBV Series Natural Vent Gas Fireplaces

MODEL OAC-4 COMBUSTION AIR ASSEM- BLY

1.Remove the cover plate from the 4” outlet opening location on the left outside of the fireplace.

WARNING

DO NOT remove the cover if the outside air will not be connected.

2. Place starting collar (4”) into hole on left side of fire-
place. Fireplace shortest side of air starting collar	WARNING	Do not use a combustible duct. Always use
NOTE: The air starting collar extends through the
through fireplace outer wrap. Fasten starting collar in		UL Listed Class 0 or 1 duct material. If nec-
place with four (4) sheet metal screws provided. Fig-		essary to splice duct, use Model 403 duct
ure 11		connector to splice duct sections.
fireplace outer wrap. When the air starting collar is
securely attached, it will form a seal against the fire-
place wall.		Air Starting Collar

3.Cut a 6” diameter opening for model OAC-4 in the outside wall covering where the outside vent is to be

located. Figure 13			Screws
4. Select and cut a piece of duct long enough to attach
to the fireplace and stick out at least 3” beyond the			Duct
face of the wall to which the OAC-4 inlet air vent will
be attached. Cut duct with a standard pocket knife.
Figure 12
Left Side of	OAC-4
Fireplace			Screws
	Starting
	Collar
		FP2024	Left Side of
			Fireplace
		Figure 12 -
	Sheet Metal	Attach Outside duct to Starting Collar
	Screws
		6” Diameter
		Hole
FP2023	Shorter End of Air
	Starting Collar
Figure 11 -			Nail
			Hole
Attach Outside Air Starting Collar to Left Side of
Fireplace	Duct Ex-
	tending 3”
	Min.

5.If using insulating duct, push the insulation back from one end of the duct approximately 2”. Figure 13

6.	Slip the exposed end of the duct over the starting col-	FP2025	AK-4 Inlet Air
	lar on the fireplace.		Vent	Screws
7.	Using the sheet metal screws provided, secure the	Figure 13 -
	duct end to the collar attached to the fireplace.	Combustion Air Assembly for Model No. OAC-4

8.Nail or screw the combustion air assembly to the sur- face of the wall.

62D4036 13