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VERTICAL INSTALLATION
Sound Attenuation for Vertical Units
Sound attenuation is achieved by enclosing the unit
within a small mechanical room or a closet. Additional
measures for sound control include the following:
1. Mount the unit so that the return air inlet is 0° to
the return air grille. Refer to Figure . Install a sound
baffle as illustrated to reduce line-of sight sound
transmitted through return air grilles.
. Mount the unit on a rubber or neoprene isolation pad to
minimize vibration transmission to the building structure.
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Figure 9: Vertical Sound Attenuation
Condensate Piping – Vertical Units
Vertical units utilize a condensate hose inside the
cabinet as a trapping loop; therefore an external trap
is not necessary. Figure 10a shows typical condensate
connections. Figure 10b illustrates the internal trap for
a typical vertical heat pump. Each unit must be installed
with its own individual vent and a means to flush or blow
out the condensate drain line. Do not install units with a
common trap and/or vent.
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Figure 10a: Vertical Condensate Drain
Figure 10b: Vertical Internal Condensate Trap
