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Recommended size of filter
t
NOTICE
This product filter is only used for energy efficiency sampling test, the user needs
to install a filter of their choice.
Installation Place
Vertical Installations
DUCT CONNECTIONS: Air supply and return may be handled in one of several ways
best place holder suited to the installation (See table for dimensions for duct inlet and
outlet connections). The vast majority of problems encountered with combination cooling
systems can be linked to improperly designed or installed duct systems. It is therefore
highly important to the success of an installation that the duct system be properly
designed and installed.
Use flexible duct collars to minimize the transmission of vibration/noise into the
conditioned space. Where return air duct is short, or where sound is could potentially to
be a problem, sound absorbing liner should be used inside the duct.
Insulation of duct work is a must where it runs through an unconditioned space during
the cooling season. The use of a vapor barrier is recommended to prevent absorption
of moisture from the surrounding air into the insulation. The supply air duct should
be properly sized by use of a transition to match unit opening. All ducts should be
suspended using flexible hangers and never fastened directly to the structure. This unit is
not designed for nonducted (freeblow) applications. Duct work should be fabricated and
installed in accordance with local and/or national codes.
Page 10
D
W
(unit: mm/inch)
MODEL (Btu/h)
18K~24K 30K~48K
mm
406.4
Length of W
inch
mm
508
Length of D
inch
mm
25.4
t
Length of
inch
Horizontal Installations
60K
495.3
584.2
16
20
23
508
508
20
20
20
25.4
25.4
1
1
1
30 inch (min)
24inch(min)
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