LAARS Mighty Max HH (Sizes 320M - 400M) - Installation, Operation and Maintenance Instructions - Manual (Page 4)

Page 4
LAARS Heating Systems
SECTION 2.
Installation Instructions
2.1 General Information
Install the Mighty Max HH boiler 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 CSA B149.1 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. In Canada, other
standards may apply. Any changes to the boiler, its
gas controls, gas orifices or wiring may void the
warranty. If field conditions require change, consult
the factory.
The Mighty Max HH boiler is designed-certified
for installation on a combustible floor. Do not install
the boiler directly on carpeting.
2.2 Boiler Placement
Clearance From Indoor Outdoor
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 in. (610mm) at front of boiler.
*1 in. (25mm) if double wall vent is used.
Table 2. Minimum Boiler Clearances
from Combustible Surfaces.
Locate the boiler 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 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.
2.3 Installation of Outdoor Boilers
CAUTION
Outdoor installations are not recommended in areas
where the danger of snow blockage exists.
ATTENTION
Les installations extérieures ne sont pas
recommandées dans les endroits ou il peut y avoir
obstruction par la neige.
1. Locate the boiler to provide at least the minimum
clearances as listed in Section 2.2, “Boiler
Placement.” HH boilers require an outdoor
terminal kit when installed outdoors (see Section
6, Parts List).
2. Do not locate the boiler 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 boiler at least 3 feet (.9m) from structures.
3. Never install the boiler under any kind of roof
overhang. Do not locate the boiler 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).
2.4 Freeze Protection
Boiler installations are not recommended in areas
where the danger of freezing exists unless proper
precautions are made for freeze protection.
Maintaining a mixture of 50% water and 50%
properly inhibited HVAC glycol is the preferred
method of freeze protection for hydronic systems. (Do
not use automotive antifreeze.) This mixture will
protect the boiler to temperatures of about -35°F
(-37°C). To get the desired temperature rise across the
WRONG
WINDOW
OR GRILL
INDOOR
ROOM
Figure 2. Incorrect Installation of Boiler.
OUT OF
PRODUCTION