Laars Mighty Max VW Series, Installation, Operation And Maintenance Instructions

Page: 4 / 32

Page 4
LAARS HEATING SYSTEMS
SECTION 2.
Installation Instructions
2A. General Information
Install the Mighty Max VW heater in accordance
with the procedures in this manual (or the Laars
warranty may be voided), local codes, and ordinances.
In the absence of such codes, install the heaters in
accordance with the latest edition of the National Fuel
Gas Code, ANSI Z223.1/National Fire Protection
Association (NFPA) 54. In Canada, the installation
must be in accordance with CAN1-B149.1 or .2 and
local codes. The authority having jurisdiction may
require the installation be in accordance with the
American Society of Mechanical Engineers (ASME)
Safety Codes for Controls and Safety Devices for
Automatically Fired Heaters, CSD-1, and in Canada,
Canadian Gas Association (CGA) 3.3. 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.
2B. 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.
2C. Installation of Outdoor Heaters
Caution
Outdoor installations are not recommended in
areas where the danger of snow blockage exists.
1. Locate the heater to provide at least the
minimum clearances as listed in Section 2B,
“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.