EarthCore Isokern MAXIMUS 2L48 Installation, Operation, Maintenance And Owner'S Manual Download Page 25

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Earthcore Industries

01/2020

Isokern Maximus Linear Series Gas Fireplace

Access Modification - Combustion Air Kits, Gas & Electrical Line Feed

4” Combustion air inlet kits are recommended by

Earthcore and may help improve fireplace operation in

homes tightly sealed and with other ventilating appliances

installed

(Figures 17 and 18)

. The following is a general

representation of a combustion air kit that is required by

Earthcore Industries.

The combustion air kit consist of a sliding stainless

steel access door affixed to a four inch (4”) in diameter

stainless steel sleeve approximately twelve inches (12”)

long. An exterior vent with dress plate, weather hood and

rodent prevention screen of a maximum one-quarter inch

(1/4”) wire mesh completes the kit.

The access door is fitted into the front 1/3 of the side

wall. The twelve inch (12”) long sleeve can be introduced

into the firebox side wall by core drilling an appropriately

sized hole at the selected firebox location. Keep the top

of the access hole no more than six inches (6”) above the

finished firebrick floor. The hole size should allow for a one-

quarter inch (1/4”) mortar joint around the air access sleeve

for heat expansion. Do not install in the rear of the firebox

because sparks will be blown into room.

The sleeve passes through the firebox side wall and

must be connected to a UL Listed Air Duct pipe that leads

to the source for outside combustion air, as directly as

possible from the fireplace. The duct cannot rise vertical

higher than the finished opening of the firebox.

We recommend not to exceed twenty feet (20’) of four

inch (4”) pipe. If you require a longer length we recommend

that you use a six inch (6”) diameter pipe for the complete

run of up to forty feet (40’).

WARNING:

Do not use combustible duct material. Avoid

installing a combustion air inlet where the opening could be

blocked by snow, bushes or other obstacles. Air inlet ducts

shall not terminate in attic, basement or garage spaces.

GAS LINE FEED

For a fireplace having the provision for installation of a gas

pipe, the provision is intended only for connection to a

decorative gas appliance.

ELECTRICAL LINE FEED

Can be routed through the LINEAR firebox side walls by

drilling an appropriately sized hole using a masonry drill

bit. Be sure to follow the gas log Appliance Manufacturer’s

explicit electrical line connection instructions for vented

masonry fireplace installations. Gas line and electric line

must be fed through separate access holes.

NOTE: Gas and electrical connections may be
brought through the rear wall of the unit and into the
area of the firebrick cavity. A gap will need to be left
in the firebrick extending from the cavity to the rear
wall of the unit for passage of the 3/8” gas line, pilot
tube, and electrical connections. Ensure all holes are
filled with mortar after installation.

Flex Duct To Fireplace

(All Parts Noncombustible)

Exterior

Wall

Exterior Air Vent

With Dress Plate

Typical Placement of

Gas or Electric Conduit

(See Detail Below)

CAUTION:

All access holes must be

grouted with mortar - after