Medium Temperature
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 (Printed in U.S.A.)
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.
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 merchandis-
er to merchandiser. 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 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.
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
!
Pan
Piping Locations
Fan
Plenum
Fan
Plenum
Pan
Front
Rear
Pod
Piping Locations
Piping Locations
