LAARS Heating Systems
Page 6
Caution
Do not force motor operation when operator is
fastened to the damper by moving the damper
blade, turning the shaft or by turning the position
indicator.
Attention
Ne pas tourner le registre manuellement avec ou
sans courant électrique ou le moteur sera
endommagé.
2.3.1 Clearances
The boiler must be placed to provide clearances
on all sides for maintenance and inspection. There
must also be minimum distances maintained from
combustible surfaces (see Table 1).
2.3.2 Flooring
The boiler shall be installed on a
level
floor of
noncombustible construction or on fire-resistant slabs
or arches. Noncombustible flooring is defined as
flooring material and surface finish not capable of
being ignited and burning and with no combustible
materials against the underside. Acceptable materials
are those consisting entirely of a combination of steel,
iron, brick, tile, concrete, slate, glass or plaster.
Do
not
install the heater directly on a combustible wood
or carpet floor without placing a noncombustible
platform between the floor and the heater.
The boiler can be installed on a combustible
floor if a noncombustible base assembly, available
from Laars, is used. See the boiler rating plate or the
Parts List (Section 11) of this manual for the
appropriate base part number.
Boilers must never be
installed directly on carpeting.
As an alternative to the Laars noncombustible
base plate, in the United States, the National Fuel Gas
Code allows a heater to be placed on a combustible
surface when there is a platform under the heater made
of hollow masonry no less than 4 inches (102
millimeters [mm]) thick, covered with sheet metal at
least 24 gauge thick and extending beyond the full
width and depth of the heater by at least 12 inches
(305mm) in all directions. The masonry must be laid
with ends unsealed, and joints matched to provide free
circulation of air from side to side through the
masonry (see Figure 4). If the boiler is installed in a
carpeted alcove, the entire floor of the alcove must be
covered by a noncombustible platform.
Note:
Clearances listed in Table 1 are manufacturer’s tested
values. These are given as minimum values. Where local and
national codes apply, and values are different than those listed in
Table 1, use the greater value to ensure safe operation.
Table 1. Minimum Boiler Clearances
From Combustible Surfaces.
Dégagements Minimaux à Assurer Entre Ics Parois de
L’appareil et leo Constructions Combustibles
Boiler Sizes
50-125
160-225
Clearances
in
cm
in
cm
Left side
6
15
6
15
Right side
6
15
6
15
Rear
6
15
6
15
Front
4
10
6
15
Flue
6
15
6
15
Top
23
48
36
91
At least 15" (381mm) access must be available in
front of the boiler for burner removal. Consult local
codes for clearances to hot water pipes and
accessories.
If the boiler is to be installed in a garage, all
burners and burner ignition devices must have a
minimum 18" (457mm) clearance above the floor.
The Model JV-50 through JV-100 boilers can be
installed in a closet, as long as the minimum
clearances shown in Table 1 and Figure 3 are
observed. Special attention should be paid to
clearances between the front of the boiler and the
closet door when it is closed.
Consult the American National Standard Z21.13
for more information concerning closet installations.
In Canada, refer to the latest edition of CSA-B149.1.
Figure 3. Closet and Alcove Installation (see Table 3).
Dimensions in inches
cm
.
6
15
6
15
6
15
4*
10
*6" for models JV160 to JV225.
Sheet Metal Cover
Min. Thickness 24 Gauge
Galvanized
Hollow
Concrete
Block
12"
Min.
Figure 4. Typical Combustible Floor Installation.
Sheet Metal Cover
Min. Thickness 24
Gauge Galvanized
Hollow
Concrete
Block
12" Min.
(305mm)
