Unit Location - Modine HD Serie Manuel D'installation Et D'entretien

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dANGER
Appliances must not be installed where they may be exposed
to a potentially explosive or flammable atmosphere.
cAUTION
1. Clearances to combustible materials are critical. Be sure to
follow all listed requirements.
2. Do not locate units in tightly sealed rooms or small
compartments (commonly referred to as confined spaces)
without provisions for adequate combustion air and
venting. Combustion air must have access to the confined
space through a minimum of two permanent openings in
the enclosure, at least one near the bottom. They should
provide a free area of one square inch per 1,000 BTU/Hr
input rating of the unit with a minimum of 100 square
inches for each opening, whichever is greater.
3. Low profile heaters are designed for use in heating applica-
tions with ambient temperatures between -40°F and 90°F.
4. Do not install unit outdoors.
5. In garages or other sections of aircraft hangars such
as offices and shops that communicate with areas used for
servicing or storage, keep the bottom of the unit at least
7' above the floor unless the unit is properly guarded.
In parking garages, the unit must be installed in accordance
with the standard for parking structures ANSI/NFPA 88A,
and in repair garages the standard for repair garages NFPA
#88B. In Canada, installation of heaters in airplane
hangars must be in accordance with the requirements
of the enforcing authority, and in public garages in
accordance with the current CSA-B149 codes.
6. In aircraft hangars, keep the bottom of the unit at least 10'
from the highest surface of the wings or engine enclosure
of the highest aircraft housed in the hangars and in accor-
dance with the requirements of the enforcing authority
and/or NFPA 409-latest edition.
7. Installation of units in high humidity or salt water
atmospheres will cause accelerated corrosion resulting in a
reduction of the normal life of the units.
IMPORTANT
To prevent premature heat exchanger failure, do not locate
ANY gas-fired appliances in areas where corrosive vapors
(i.e. chlorinated, halogenated or acid) are present in the
atmosphere.
location recommendations
1. When locating the heater, consider general space and
heating requirements, availability of gas and electrical
supply, and proximity to vent locations.
2. When locating units, it is important to consider that the exhaust
vent piping must be connected to the outside atmosphere.
3. Be sure the structural support at the unit location site is
adequate to support the unit's weight. For proper operation
the unit must be installed in a level horizontal position.
4. Do not install units in locations where the flue products
can be drawn into the adjacent building openings such as
windows, fresh air intakes, etc.
5. Be sure that the minimum clearances to combustible
materials and recommended service clearances are
maintained. Units are designed for installation with the
minimum clearances as shown in Table 4.1.
4
Table 4.1 Clearances
unit side
Combustible materials
Top and Bottom
Access side
non-Access side
rear
vent Connector
6. Do not install units in locations where gas ignition system is
exposed to water spray, rain, or dripping water.
7. Mounting Height (measured from bottom of unit) at which
unit heaters are installed is critical. Refer to mounting height
and heat throw data on pages 19-20 of this manual. The
maximum mounting height for any unit is that height above
which the unit will not deliver heated air to the floor.
Combustion Air requirements
The National Fuel Gas Code defines an "unconfined space" as
a space whose volume is greater than 50 cubic feet per 1,000
Btu/Hr input of the installed appliance(s). A confined space
is 50 cubic feet or less per 1,000 Btu/Hr input of the installed
appliance(s).
It is not recommended to install these unit heaters into
residential confined spaces. This recommendation is due to the
concern that at some point in time, the combustion air openings
provided by the installer may become blocked or eliminated by
the owner, either intentionally or unintentionally. Despite this
commendation, if these units are installed into a residential
confined space, see National Fuel Gas Code ANSI Z223.1
or CSA B149.1 Installation Code, latest edition, for detailed
combustion air provisions. These requirements must be adhered
too.
Units installed into confined spaces in industrial/commercial
installations must be provided with two permanent openings
- one near the top and one near the bottom of the confined
space. Each opening should have a free area of not less than
one square inch per 1,000 Btu/Hr of the total input rating of all
units in the confined space, freely communicating with interior
areas having, in turn, adequate infiltration from the outside.
For further details on supplying combustion or to a confined
(tightly sealed) space or unconfined space, see the National Fuel
Gas Code ANSI Z223.1 or CSA B149.1 Installation Code, latest
edition.
Turning The unit 180° (model sizes 30-75 only)
All units are produced at the factory with left-side controls (when
looking at the unit). If the installation requires the controls to be
on the right side, all heaters - with the exception of the HD/HDB
100 and 125 - can be turned-over by following the instructions
below.
• By turning the unit 180° from the way it was received from
the factory, the sides become opposite but the front and
back remain in the same relative position. The bottom panel
now becomes the top panel and vice-versa.
• Remove the access panel, turn it 180°, and re-attach it to
the unit so that all the information labels can be read.
• Remove the spring loaded deflector blades, turn them over,
replace, and adjust so they are open and in a position to
direct the heated air down to the floor.
6-583.2
Clearance To recommended
service Clearance
1"
18" 18"
1"
18" 18"
4"
1"
1"
4"