Combustion Air Assembly - Monessen Hearth B-Vent Specialty Gas Fireplace System DESIGNER SERIES Installation And Operation Manual

C
OMBUSTION
M AK4 C
ODEL OMBUSTION
1. Remove the cover plate from the 4-inch outlet opening location on the left outside of the fireplace. DO NOT
remove the cover if the outside air will not be connected.
2. Place the starting collar (4 inch) into the hole on the left side of the fireplace. Fasten it in place with the four
sheet metal screws provided.
3. Cut a 6-inch diameter opening for model AK4 in the outside wall covering where the outside vent is to be
located.
4. Select and cut a piece of duct sufficient length to attach to the fireplace and protrude at least three inches
beyond the face of the wall to which the inlet air vent will be attached. The duct may be cut with a standard
pocket knife (use FP-4 U duct for maximum efficiency and safety). Do not use a combustible duct. Always
use UL Listed Class 0 or 1 duct material. If it is necessary to splice the duct, a Model 403 duct connector
should be used to splice duct sections.
5. If the duct is the insulated type, push the insulation back from one end of the duct approximately two inches.
6. Slip the exposed end of the duct over the starting collar on the fireplace.
7. Using the sheet metal screws or duct clamps, secure the duct to the starting collar and to the outside vent.
8. Nail or screw the outside vent to the surface of the wall.
INSERT SHORTEST SIDE OF INSERT SHORTEST SIDE OF
THE TUBE THROUGH THE THE TUBE THROUGH THE
FIREPLACE OUTER WRAP. FIREPLACE OUTER WRAP.
A A
IR SSEMBLY
A A
IR SSEMBLY
6" DIA. HOLE FOR OAC4 6" DIA. HOLE FOR OAC4
LONGER LENGTH OF THE TUBE LONGER LENGTH OF THE TUBE
TO OUTSIDE. TO OUTSIDE.
STEP 1: SECURE OUTSIDE AIR STARTING STEP 1: SECURE OUTSIDE AIR STARTING
COLLAR TO LEFT SIDE OF FIREPLACE WITH COLLAR TO LEFT SIDE OF FIREPLACE WITH
FOUR SHEET METAL SCREWS PROVIDED. FOUR SHEET METAL SCREWS PROVIDED.
NAIL NAIL
HOLES HOLES
SCREWS SCREWS
STEP 2: SECURE OUTSIDE STEP 2: SECURE OUTSIDE
DUCT TO STARTING COLLAR DUCT TO STARTING COLLAR
WITH DUCT CLAMP OR SCREWS. WITH DUCT CLAMP OR SCREWS.
16
53D9019. Rev 3 11/07