2-2
R
efRIgeRatIon
/ e
lectRIcal
P/N 0515388_L
U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com
As shown in Figure 2-3, rotate and center the
shroud over the refrigeration outlet foam pad,
then fasten to the interior liner of the bottom.
After connections have been made, seal this
outlet thoroughly. Seal both the inside and the
outside. We recommend using an expanding
polyurethane foam insulation. Cover foam
with silicone to prevent water from entering
foam.
Multiplexing
Piping of merchandisers operating on the same
refrigeration system may be run from mer-
chandiser to case.
d
o
not
run
refrigerant
lines
through
merchandisers
that
are
not
on
the
same
refrigeration
system
Branch
as this may result in poor refrigeration
control and compressor failure.
Interconnecting piping inside the merchandiser
must be located as shown below to allow room
for lifting the hinged fan plenums and for
clearance beneath the display pans.
Alternately, the interconnecting piping may
be run outside the merchandiser in the area
shown.
Line Sizing
Refrigerant lines should be sized as shown on
the refrigeration legend that is furnished for
the store or according to ASHRAE guide-
lines. Refer to the information on the next
page for branch line piping of Hussmann
Equipment.
Oil Traps
P-traps (oil traps) must be installed at the base
of all suction line vertical risers.
Pressure Drop
Pressure drop can rob the system of capacity.
To keep the pressure drop to a minimum, keep
the refrigerant line run as short as possible
using a minimum number of elbows. Where
elbows are required,
use
long
radius
elbows
only
.
Piping
Locations
Refrigeration
Connection
Pan
Fan Plenum
Pan
Fan Plenum
Pod
M4XE
Center shroud over refrigeration outlet
foam pad and fasten to interior liner.
Figure 2-3
