P/N 0518258_D
2-1
Produce & Bakery
HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.
Medium Temperature
P/N 0518258_C
2-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
REFRIGERANT
The correct type of refrigerant will be
stamped on each merchandiser’s serial
plate. The case refrigeration piping is leak
tested, factory sealed and pressurized.
Before making refrigeration hookups,
depress the universal line valve to ensure
that coils have maintained pressure during
shipment.
REFRIGERANT PIPING
Connection Location
The refrigerant line connections are at the
right- hand end of the merchandiser (as viewed
from the front) beneath the display pans. A
sticker marks the location of the connection
“pod.” The installer must saw a hole through
the pod to exit the case.
After connections have been made, seal this
outlet thoroughly. Seal both the inside and the
outside. We recommend using an expanding
polyurethane foam insulation.
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
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. Or the
interconnecting piping may be run outside the
case in the wireway 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.
REFRIGERATION / ELECTRICAL
Refrigeration lines are under pressure
and should be depressurized before
attempting to make any connections.
WARNING
When brazing pipes, be sure to use the
insulation blanket shipped with the
merchandiser to prevent damage to the
plastic case bottom.
CAUTION
Pan
Piping
Locations
Fan Plenum
Pod
