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FIGURE 12
CLEARANCES
left side of unit. (See Figure 12.) If no economizer is required, then a 12" clearance
is required on left side of unit.
2. Provide 60" minimum clearance between top of unit and maximum 3 foot overhang.
3. Unit is design certified for 2" minimum clearance between supply duct and a com-
bustible structure for the first 3 feet of duct. 0" clearance is allowed after 3 feet.
F. ROOFTOP INSTALLATION
1. Before locating the unit on the roof, make sure that the roof structure is adequate to
support the weight involved. (See electrical & physical tables in this book for weight
of unit.) THIS IS VERY IMPORTANT AND THE INSTALLER'S RESPONSIBILITY.
2. For rigging and roofcurb details, see Figures 17, 18, and 19.
3. The location of the unit on the roof should be such as to provide proper access for
inspection and servicing.
IMPORTANT: If unit will not be put into service immediately, block off supply and return
air openings to prevent excessive condensation.
G. DUCTWORK
The installing contractor should fabricate ductwork in accordance with local codes. Use
industry manuals as a guide when sizing and designing the duct system. Contact Air
Conditioning Contractors of America, 1513 16th St. N.W., Washington, D.C. 20036.
WARNING
DO NOT, UNDER ANY CIRCUMSTANCES, CONNECT RETURN DUCTWORK TO
ANY OTHER HEAT PRODUCING DEVICE SUCH AS FIREPLACE INSERT,
STOVE, ETC. UNAUTHORIZED USE OF SUCH DEVICES MAY RESULT IN FIRE,
CARBON MONOXIDE POISONING, EXPLOSION, PERSONAL INJURY, OR
PROPERTY DAMAGE.
17
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