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P/N 428668A
REFRIGERANT
The correct type of refrigerant will be stamped
on each merchandiser's serial plate. The case
refrigeration piping is pressurized, leak tested
and factory sealed. Before making refrigera-
tion hookups, depress universal line valve to
ensure that coils have maintained pressure
during shipment.
WARNING
!
Refrigeration lines are under pressure and
should be depressurized before attempting
to make any connections.
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.
Piping Locations
Pan
Fan
Plenum
Pod
Front
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 (Printed in U.S.A.)
REFRIGERATION / ELECTRICAL
Piping Locations
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 merchandis-
er to merchandiser. D
LINES THROUGH MERCHANDISERS THAT ARE
NOT ON THE SAME REFRIGERATION SYSTEM
as this may result in poor refrigeration
BRANCH
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 raceway
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 guidelines. Refer to the
information on the next page for branch line pip-
ing of Hussmann Equipment.
Piping Locations
Pan
Fan
Plenum
Rear
O NOT RUN REFRIGERANT
Oil Traps
P-traps (oil traps) must be
installed at the base of all
suction line vertical risers.
Medium Temperature
2-1
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