LAARS Mighty Therm HH-PH (Sizes 175-400) - Installation, Operation and Maintenance Instructions - Manual (Page 6)

LAARS HEATING SYSTEMS Page 6
Figure 12. Standard Base for Combustible Floor.
Figure 13. Typical Roof Mounting with Standard
Combustible Mount Base.
4 ft.
(1.2 m)
4 ft.
(1.2 m)
4 ft.
(1.2 m)
There must be a minimum of 4 feet (1.2 m)
horizontally between the boiler and any door, window,
or gravity inlet to a building (see Figure 11). Also, the
horizontal clearance should be maintained from any
electric meters, gas meters, regulators, or relief
equipment.
If the boiler is installed close to a structure,
protect it from rain water runoff with rain gutters on
the roof or other measures. Do not locate the boiler
near sprinkler systems that could spray water on it.
Avoid locations where wind deflection off
nearby structures might cause wind loading and
downdraft conditions. Where downdraft conditions
exist, locate the boiler at least 3 feet (0.9 m) from the
structure.
2C-3. Flooring - Typical Installation
All boilers are equipped with a special base, as a
standard part of the boiler. The unit is designed and
certified for installation on combustible flooring.
Never install the boiler on carpeting. Never store
objects on or around the base of the boiler.
For rooftop installation, see Figure 12 through
Figure 14.
The boiler must be isolated or otherwise
protected from any source of corrosive chemical
fumes, such as trichlorethylene, perchlorethylene,
chlorine, etc. Install the boiler so that the gas ignition
system components are protected from water
(drippings, spraying, rain, etc.) during operation and
service. Locate the boiler on a waterproof floor with a
floor drain and a 6 inch (152 mm) minimum curb on
all four sides to protect the building if boiler repairs
are needed.
2C-2. Outdoor Installation (U.S. Only)
Caution
Outdoor installations are not recommended in
areas where the danger of snow blockage exists.
HH-PH boilers can be installed in the “low-profile,”
grate top configuration as received from the factory,
or with an optional vent cap/stack.
Locate the boiler in an open, unroofed area. Do
not locate the boiler below or adjacent to any doors,
windows, louvers, grills, etc., which connect in any
way with an inhabited area of a building, even though
the access might be through another structure such as
a garage or utility room (see Figure 10 and Table 1).
Figure 10. Incorrect Outdoor Installation.
Figure 11. Outdoor Location.
WINDOW
OR GRILL
INDOOR
ROOM