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LAARS Heating Systems
Automatically Fired Heaters, CSD-1. In Canada, other
standards may apply. Any changes to the heater, its
gas controls, gas orifices, or wiring may void the
warranty. If field conditions require change, consult
the factory.
The Mighty Max VW heater is designed-
certified for installation on a combustible floor, if a
non-combustible base is first placed under the heater.
Do not install the heater directly on carpeting
without placing a metal or wood panel between the
carpeting and the heater. The metal or wood panel
must extend beyond the full width and depth of the
heater by at least 3 inches (76.2mm) in all directions.
If the heater is installed in a carpeted alcove, the entire
floor of the alcove must be covered by the
metal or wood panel. The panel must be strong enough
to carry the total weight of the heater and all piping,
pumps, and any other equipment attached to the
heater.
Clearance
Indoor
Outdoor
From Combustibles
Inches
mm
Inches
mm
Top
18
457
Unobstructed
Water Conn. Side
12
305
12
305
Opposite side
6
152
6
152
Front
Alcove
Unobstructed
Rear
6
152
6
152
Vent
*6
*
152
—
Flooring
Combustible
Combustible
Service clearance = 24 inches (610mm) at front of heater.
*1" (25mm) if double wall vent is used.
Table 2. Minimum Heater Clearances
From Combustible Surfaces.
2.2 Heater Placement
Locate the heater to provide adequate clearances
on all sides for maintenance and inspection. There
must also be minimum distances maintained from
combustible surfaces (see Table 2). The heater must be
isolated or otherwise protected from any source of
corrosive chemical fumes, such as trichlorethylene,
perchlorethylene, chlorine, etc. Install the heater so
that the gas ignition system components are protected
from water (drippings, spraying, rain, etc.) during
operation and service.
2.3 Installation of Outdoor Heaters
CAUTION
Outdoor installations are not recommended in
areas where the danger of snow blockage exists.
AVERTISSEMENT
L’eau chaude peut brûler ! L’eau chaude peut
causer des brûlures du troisième degré en 6
secondes à 60°C (140°F) et en 30 secondes à
54°C (130°F).
1.
Locate the heater to provide at least the
minimum clearances as listed in Section 2.2,
“Heater Placement.” VW heaters require an
outdoor terminal kit when installed outdoors (see
Section 6, Parts List).
2.
Do not locate the heater in an enclosure or through-
wall recess. Avoid locations where wind deflection
off structures might cause down-draft. When such
wind conditions are possible, locate the heater at
least 3 feet (.9m) from structures.
3.
Never install the heater under any kind of roof
overhang. Do not locate the heater below or
adjacent to any doors, windows, louvers, grills, etc.
which communicate in any way with an inhabited
area of a building, even though such
communication might be through another structure
such as a garage or utility room (see Figure 2).
Figure 2. Incorrect Installation of Boiler.
2.4 Freeze Protection
Although Mighty Max VW heaters are design-
certified for outdoor installations, such installations
are not recommended in areas subject to freezing
temperatures, unless proper precautions are taken.
Power outage, interruption of gas supply, failure
of system components, activation of safety devices,
etc., may prevent a heater from firing.
Any time a
heater is subjected to freezing conditions, and the
heater is not able to fire, and/or the water is not
able to circulate, there is a risk of freezing in the
heater or in the pipes in the system.
When water
freezes, it expands. This can result in bursting of pipes
in the system, or damage to the heater, which could
result in leaking or flooding conditions.
Contact the local factory representative or Laars
for additional information.
2.5 Installation of Indoor Water Heaters
Combustion Air Supply and Ventilation:
There are a variety of options available to the
installer when it comes to venting and combustion air;
venting can be vertical or horizontal, it can originate at
OUT OF
PRODUCTION
