Ductwork
Ductwork should be made and sized by installer .
• On ductwork exposed to outside air conditioning space, use at least 50 mm of insulation and a vapor barrier .
Flexible joint may be used to reduce noise .
NOTE
A closed return duct system shall be used . This shall not preclude use of economizers or ventilation air intake . Flexible joints
may be used in the supply and return duct work to minimize the transmission of noise .
• When fastening duct work to the side duct flanges on the unit, insert the screws through the duct flanges only .
DO NOT insert the screws through the casing . Outdoor duct work must be insulation and waterproofed .
CAUTION
• Be sure to note supply and return openings . Refer to Fig . 4 and 5 for information concerning supply and return
air duct openings .
NOTE
Condensate drain connection
To provide extra protection from water damage, install an additional drain pan, provided by installer, under the entire
unit with a separate drain line . Manufacturer will not be responsible for any damages due to the failure to follow these
requirements .
Install drain pipe
1 . Use female NPT threaded fitting for outside connection and make sure that drain holes are not blocked .
2 . Insulation may be needed for drain line to prevent sweating .
3 . Drain pan has two drain connections on each side to provide flexibility of connection and drainage . Make sure proper
pitch and plugging if second connection is not used .
4 . Use a sealing compound on male pipe threads . Install the condensate drain line (NPT) to spill into an open drain .
Filters
f Units are shipped without a filter or filter racks . It is the responsibility of the installer to secure a filter in the return air
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ductwork or install a filter/frame Kit .
f Filter must always be used and must be kept clean . When filter become dirt laden, insufficient air will be delivered by the
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fan, decreasing your units efficiency and increasing operation costs and wear-and tear on the unit and controls .
f Filters should be checked monthly .
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2014-06-11 오후 8:07:24