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2.3 Installation
NOTE:
This equipment is designed for indoor installation
only.
The indoor units can be installed in one of the follow-
ing orientations: upflow, horizontal left, or horizontal
right. Figure below for reference.
Sheet metal duct work run in unconditioned spaces must be adequately insulated and covered with a vapor
barrier. Fibrous duct work may be used if constructed and installed in accordance with SMACNA Construc-
tion Standard on Fibrous Glass Ducts. Duct work must comply with National Fire Protection Association as
tested by U/L Standard181 for Class l Air Ducts. Check local codes for requirements on duct work and
insulation.
Duct system must be designed within the range of external static pressure the unit is designed to operate
against. It is important that the system airflow be adequate. Make sure supply and return duct work, grills,
special filters, accessories, etc, are accounted for in total resistance.
Minor field modifications are necessary to convert to
horizontal left. Up-flow installation method is selected
by default. When the unit is mounted in the horizontal
right configuration, rotate it to the right for 90
degrees, as shown in image horizontal right installa-
tion. When the unit is horizontal left mounted, the
following steps are required.
1). Disassemble the lower panel and the sealed plate
2). Disassemble the retaining clips for the evaporator
so that the evaporator can be pulled out along the
lead rail easily
3). Rotate the evaporator for 180 degrees and insert
it into the upper side of the lead rail
4). Rotate the unit to the left for 90 degrees, as
shown in image horizontal left installation
5). Reinstall the sealed plate and the lower panel.
Do not, under any circumstances, connect return duct
work to any other heat producing device such as
fireplace insert, stove, etc. Unauthorized use of such
devices may result in fire, carbon monoxide poison-
ing, explosion, personal injury or property damage.
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