4 MCP15-500.9
Location Recommendations
1. When locating the packaged rooftop unit, Model MPR,
consider general space and cooling/heating requirements and
availability of gas and electrical supply.
2. Be sure the structural support at the unit location site is
adequate to support the weight of the unit and any other
required support structure. For proper operation the unit
must be installed in a level horizontal position.
3. All mechanical equipment generates some sound and
vibration that may require attenuation. Locating the
equipment away from the critical area is desirable within
ducting limitations. Frequently, units can be located above
utility areas, corridors, restrooms, and other non-critical
areas. Generally, a unit should be located within 15 feet of
a primary support beam. Smaller deflections mean lesser
vibration and noise transmission. For critical applications,
please consult with an acoustical attenuation expert.
4. Do not install units in locations where the flue products
(if equipped with a gas fired heating option) 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. For units with the gas heating option, be sure
clearances are maintained to the combustion air inlet
louvers and power exhauster discharge cover. Units are
designed for installation on non-combustible surfaces with
the minimum clearances shown in Figures 4.1 and 5.1.
6. On units that have fresh air openings, a method must be
provided to prevent water and debris from entering the unit
such as a rainhood, which is available as an accessory
from Modine. Where possible, install the unit so that the
inlet is not facing into the prevailing wind to prevent water
entrainment.
7. The exhaust fan is not designed for high temperature
or smoke control exhaust applications. Exhaust air
temperature must not exceed 104°F. Operating the
exhaust fan above 104°F will result in failure of the
exhaust fan.
UNIT LOCATION
CAUTION
Appliances are designed for outdoor installation only.
DO NOT LOCATE THIS APPLIANCE INDOORS.
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.
DANGER
Appliances must not be installed where they may be
exposed to potentially explosive or flammable atmosphere.
UNIT LOCATION / COMBUSTIBLE MATERIAL & SERVICE CLEARANCES
36.0
36.0
48.0
SEE NOTE 1
SEE NOTE 4
FIELD INSTALLED
ACCESSORY
RAINHOOD
FOR UNITS WITH GAS HEAT,
MAINTAIN 48" MINIMUM
FROM VENT TERMINATIONS
36.00
36.0
SEE NOTE 4
48.0
SEE NOTE 3
48.0
SEE NOTE 1
B- AND C-CABINET UNITS WITHOUT ENERGY RECOVERY
B- AND C-CABINET UNITS W
ITH ENERGY RECOVERY
FOR UNITS WITH GAS HEAT,
MAINTAIN 48" MINIMUM
FROM VENT TERMINATIONS
FIELD INSTALLED
ACCESSORY
RAINHOOD
Figure 4.1 - Combustible Material & Service
Clearances (continued next page)
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