LAARS Mighty Therm LO-NOx VW (Sizes 250/400) - Installation, Operation and Maintenance Instructions - Manual (Page 6)

LAARS Heating Systems Page 6
2.3.2 Outdoor Installation
Caution
Outdoor installations are not recommended in areas
where the danger of snow blockage exists.
a. Locate the heater in an open, unroofed area. Do
not locate the heater 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 17 and Table 1).
2.3 Site Location
2.3.1 Installation Information
WARNING
Improper installation or maintenance can cause
nausea or asphyxiation from carbon monoxide in
flue gases which could result in severe injury,
property damage, or death.
Avoid placing the heater in locations where it can
cause damage by water or condensate leakage. If this is
not possible, provide a suitable drain pan under the
heater to catch and divert any leakage. The pan must
not restrict air flow around the heater.
Locate the heater to provide adequate clearance
on all sides for inspection, service and to provide
adequate air circulation for proper operation.
Locate the heater so the clearances from
combustible surfaces shown in Table 1 and Figure 16
are met.
Locate the heater 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 heater repairs
are needed.
Figure 16. Alcove Installation.
Closet Installation
(unacceptable)
A closet is any 4 sided enclosure
which is less than 16* times the
total volume of all the gas fired
appliances within the enclosure.
Room Installation
(acceptable)
A room is any enclosure which is
at least 16* times greater than the
total volume of all the gas fired
appliances within the enclosure
Alcove Installation
(acceptable)
An alcove suitable for the
installation of a heater is a
restricted section of a room not
separated from the room by a door
or partition and which meets the
minimum clearances specified in
this manual.
* When the ceiling height exceeds 8 feet, you are only allowed to
consider 8 feet when calculating the total volume of the enclosure.
Indoors Outdoors
Clearance from: inch cm inch cm
Top 37 94 Unobstructed
Water conn. side 12 30.5 Unobstructed
Opposite side 6 15.2 6 15.2
Front Alcove Unobstructed
Rear 6 15.2 6 15.2
Vent* 6 15.2 —
Flooring: Combustible
Service clearance = 36 inches (91.4cm) at front of heater,
and 18 inches (46cm) at water connection side.
*1" (2.5cm) if double wall vent is used.
6" base for outdoor boiler is required.
Table 1. Minimum Boiler Clearances
from Combustible Surfaces.
b. There must be a minimum of 4 feet (1.22 m)
horizontally and vertically between the heater
and any door, window, or gravity inlet to a
building (see Figure 18).
c. Minimum clearance of 4 feet (1.22m) [6 feet
(1.83m) in Canada] horizontally from, and in no
case above or below, unless the minimum
horizontal distance is maintained, from electric
meters, gas meters, regulators and relief
equipment.
d. If the heater 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
heater near sprinkler systems that could spray
water on it.
e. Avoid locations where wind deflection off nearby
structures might cause wind loading and
downdraft conditions. Where downdraft
conditions exist, locate the heater at least 3 feet
(0.91 m) from the structure.
2.3.3 Flooring - Typical Installation
All outdoor boilers must be installed with the
special base, as a standard part of the heater. The base,
part number R0368900, is provided in a separate
package. The heater is designed and certified for
installation on combustible flooring. NEVER install
the heater on carpeting. NEVER store objects on or
around the base of the heater. For outdoor base
installation, see Figure 18.
REAR
FRONT
OUT OF
PRODUCTION