Multiplexing; Line Sizing; Oil Traps; Pressure Drop - Hussmann Impact Excel M5X Installation And Service Manual

R
2-2
EFRIGERATION
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.
Center shroud over refrigeration outlet
foam pad and fasten to interior liner.
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 case to
case. D
O NOT RUN REFRIGERANT LINES
THROUGH MERCHANDISERS THAT ARE NOT ON
THE SAME REFRIGERATION SYSTEM BRANCH
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
case in the area shown.
P/N 0463880_E
/ E
LECTRICAL
Figure 2-3
as
Refrigeration
Connection
Piping
Locations

Line Sizing

Refrigerant lines should be sized as shown on
the refrigeration legend that is furnished for the
store or according to ASHRAE guidelines.
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
Pan
Fan Plenum
.
. .
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