K & W Manufacturing Co., Inc.,
23107 Temescal Canyon Road, Corona CA 92883
951-277-3300 Phone 951-277-2070 FAX www.k-and-w-mfg.com
Series 1600
Heat Circulating Fireplace
Installation Instructions
Page 5 of 6
Construction Details
Fire Magic Circulator:
Set the Fire Magic unit on the firebrick without mortar or other material underneath. Completely cover the unit with the
insulation furnished. A thin mixture of mortar brushed on the unit will hold insulation in place. This insulation material is
important. It provides an expansion layer between the metal of the circulator and the masonry, and helps prevent cracking.
WARNING: This insulation material contains fiberglass wool. It may cause irritation to skin, eyes, and respiratory
tract. Avoid contact with eyes and skin. Protect yourself by wearing long sleeved, loose fitting clothing, gloves and
eye protection when handling and applying material. (Do not tape sleeves or pants at wrists or ankles.) As an extra
precaution, you may choose to wear a disposable dust respirator at all times. Wash with soap and warm water after
handling. Wash work clothes separately and afterwards wipe out washer.
Laying of Masonry:
Lay masonry around and to the top of the unit. (See typical construction details on page 1). The masonry walls
surrounding the circulator should be a minimum thickness of 4”. Leave channels for air passage as described in the
following section on air inlets and outlets. The masonry face (front) may be built at this time or after the chimney is
completed. Angle iron should be used in the masonry to support the single hot air outlet, and at the transition from the
masonry to the flue liner for support of the chimney and flue.
A smoke shelf should be formed in the sloping space behind the unit. (See section view on page 1). Be sure to use a
layer of the insulation material between the unit and the fill used to form the shelf to prevent cracking.
Exterior Air Ducts:
Fire Magic circulators come with exterior (or combustion) air ducts built into the sides of the units. Each duct has an
8 square inch passageway which needs to be continued through the masonry to an air intake opening. The minimum
combustibles clearance for all parts of the ducts and their passageways is 1 inch.
The exterior air intakes may not be located at an elevation higher than the firebox. The air intakes must pull the
combustion air from the exterior of the dwelling or from spaces within the dwelling ventilated with outside air such as non-
mechanically ventilated crawl or attic spaces. The exterior air intakes
may not
be located within the garage or basement
of the dwelling. The exterior air intakes should be covered with a corrosion-resistant screen of 1/4-inch mesh.
Air Inlets and Outlets:
Channels must be left in the masonry for each inlet and outlet.
All
air inlets and outlets
must be open
to allow circulating
airflow for the Fire Magic circulator to operate correctly.
Failure to allow all inlets and outlets to circulate air could result in
warping of the circulator, damage to the surrounding masonry, and voids the warranty.
The channels should be sized to fit the size of the Fire Magic circulator. If Fire Magic air grills
or fan sets are used, simply match the size of the grill-mounting frame. When spaced masonry
grilles (or some other inlet and outlet coverings) are desired, use the table at the right for opening
requirements. The two air inlets must provide at least the net square inches of open space
specified for the model unit used. The single front outlet must provide at least the same net square
inches of open space specified.
Insufficient open space allowances for air inlets and outlets will
restrict air circulation, reduce the efficiency of the fireplace, and possibly damage the unit, voiding
the warranty.
Each channel should be ”plastered” smooth to seal the walls of the channels to avoid any possible smoke and air
leakage from voids in the masonry. The “plastering” also helps improve the airflow into and out of the unit. In addition, use
additional insulation material in the joint between the masonry channel and the inlets and outlets to provide a better seal.
This step helps to prevent air from moving directly from the inlet channels to the outlet channels.
Model
No.
Minimum
combined
sq. inch
opening
1634A
70
1636A
70
1642A
80
1648A
110
Continued on page 6
Continued from page 2
