Mr. Heater MH25NG Instrucciones De Funcionamiento Y Manual Del Propietario página 6

• This heater may be mounted on any wall; however,
it is recommended that the heater be mounted in
the middle of the wall opposite any overhead doors.
• When selecting installation locations for this
heater ensure that the opening of any exterior or
interior doors or windows will not violate minimum
clearances or contact any heater components.
• If an overhead door is installed in the building, verify
that the heater is not installed in such a way as to
interfere with door operation and verify that the
door in its open position will not reduce clearances
below the minimum requirements. Never mount the
heater in such a way that would position the heater
above an opened overhead door.
• Ensure that no gas lines or electrical wiring or
conduits will interfere with mounting of the heater
to the wall.
• Depending on local codes and requirements and
the installer's skill level, the sizing and installation of
gas lines required to supply the heater may require
the assistance of a professional. If in doubt as to
these requirements, discuss the requirements of
this manual with the dealer from whom the heater
was purchased and your gas supplier, or call our
customer service department at 1-800-251-0001.
The selection of the thermostat mounting location is
critical to efficient and effective heater operation.
• In most cases the infiltration around your uninsulated
entry doors and windows will provide enough air
flow for efficient heater operation.
1.1 Fresh Air for Combustion and Ventilation
Unrestricted air flow during heater operation is essential
to prevent the area above the installed heater from
overheating. If your workshop/utility building is tightly
insulated (including windows, doors, openings, etc.) the
following ventilating methods must be followed:
• A single exhaust vent is supplied with your heater
for your convenience. This vent must be located
above the heater (preferably at the highest point in
the building interior) and it must vent to the exterior
of the building. An additional vent is available from
the factory for those having a finished workshop or
utility building.
• An intake vent, or equivalent, from the exterior
of the building and having an effective area of 75
square inches must be located below the heater
(preferably within 2 feet of the building's floor).
• Openings equivalent to intake vent would be:
partially open doors and partially open windows.
• Openings of this size (5 inch by 13 inch, or 3 inch by
25 inch) will prevent dangerous heat buildup above
the heater.
Mr. Heater Gas Fired Infrared Workshop Heater
1.2 Thermostat Guidelines
• The thermostat should be mounted about 5 feet
above the floor where air can circulate freely around
it.
• The thermostat should not be mounted directly to
a cold exterior wall without an insulated mounting
block.
• The thermostat should not be mounted in direct
drafts.
• The thermostat should not be mounted directly
below the installed the heater.
• The thermostat should not be installed at a distance
that is farther from the heater than the length of the
thermostat cable.
2. HEATER MOUNTING INSTRUCTIONS
After selecting the heater installation location and the
thermostat location and after verifying and ensuring
that all of the above placement requirements are
fulfilled, mount the heater as follows:
A. Determine how you wish to install the vent based
on the construction of the building and your
personal preference. (i.e., do you wish the flanged
(finished) side on the interior or the exterior of the
building or do you want two vents so that both
exterior and interior will be finished?) If needed,
order an additional vent from the factory. Our
address and toll free phone number are on the rear
cover of this manual. Install the vent as follows:
1. See Figure 3 for dimensions and information on
the vent.
2. Select a place as high above the heater
as possible in accordance with the above
requirements and ensure that the vent or
vents will not contact or interfere with existing
building systems (i.e., ducts, wiring, plumbing,
etc.)
3. Place the unfinished side of the vent against
the wall in its elected location and trace its
dimensions on the wall with a pencil or other
suitable marker.
4. Cut or otherwise open a hole in the wall,
or walls for finished buildings, having the
dimensions of the unfinished side of the vent.
5. Install the vent or vents as desired and retain
with 4 suitable fasteners through the predrilled
holes in vent flange.
B. Prepare to install the heater wall mounting bracket
as follows:
1. If the wall mounting bracket is to be attached
to a stud and wallboard wall, refer to Figure
3 for dimensions, locate a stud, and drill two
1/8" pilot holes into the stud centerline. Use
E6
Operating Instructions and Owner's Manual