REFRIGERANT
The correct type of refrigerant will be stamped
on each merchandiser’s serial plate. The case
refrigeration piping is factory sealed, pressurized
and leak tested. Before making refrigeration
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
merchandiser 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. The
interconnecting piping may be run outside the
case.
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
.
P/N 0453549
2-1
Elite Service Merchandisers
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
REFRIGERATION / ELECTRICAL
Refrigeration lines are under pressure
and should be depressurized before
attempting to make any connections.
WARNING
!
Piping Location
Display Pan
When brazing pipes be sure to use the
insulation blanket shipped with the
merchandiser to prevent damage to the
plastic case bottom.
CAUTION
!
