- 8 -
Check
Draft
Here
Fig. 12
Retrofitting To An Existing Brick Chimney
The CFM Majestic Products Company strongly recommends
installing an approved chimney liner in an existing brick
chimney.
This will maximize the potential draft of the chimney and
lessen the effects of slow chimney start up.
This is important because many homes (including older
renovated ones) have become much tighter with respect to
air exchange (a home breathing). An overly tight home will
create conditions that will affect proper vent performance.
It may be necessary to install some form of makeup air to
the lowest extremities of the home. This will help to ensure
the above noted condition will not effect the proper operation
of this or any other combustion fireplace within the dwelling.
PROPER VENT PERFORMANCE
A spillage test must be performed prior to leaving the
fireplace with the customer. Carry this test out in the
following manner.
1) Close all windows and doors in the room; start all
exhaust fans in the house and furnace blower.
2) Light the fireplace and place in operation on high fire.
3) After several minutes, test with smoke match that there
is adequate "pull" at the draft hood opening (located on
the sides of the fireplace near back. See Figure 12)
If the flue is blocked (match being blown back into
room) the Vent Safety Switch will automatically shut
down the heater.
4) Should the heater turn off, wait approximately 10-15
minutes to allow for the switch to reset. Check draft
again. If the smoke is not drawn into the draft hood turn
the fireplace off and check the cause of lack of draft,
consult your dealer for expert advice.
VENT SAFETY SYSTEM
This fireplace is equipped with a vent safety shut down
switch. This switch is factory installed, wired and tested.
Check and make sure the switch and wires are in the proper
position. The safety switch is heat activated and wired in
series with the pilot system.
Operation of this fireplace when not
connected to a properly installed and
maintained venting system or tampering with
the vent safety shutoff system can result in
carbon monoxide (CO) poisoning and possibly
death.
COMBUSTION AIR
It is very important that an adequate air supply is available
when the unit is being operated. Since most homes of
today are tightly sealed and insulated, additional make-
up air is usually necessary.
This fireplace has been designed to operate by drawing air
in from the front and outer perimeters of the fireplace. The
air provides combustion air ensuring a clean burning
flame, dilution air for proper venting, as well as, the air
which the fan circulates over the firebox/heat exchanger
system.
Insulating around the fireplace will result in overheating
and possible malfunctioning of the circulating fan.
