Elite
Medium Temperature
P/N 0453523
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 refrig-
eration 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 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 inter-
connecting 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 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
.
REFRIGERATION / ELECTRICAL
Refrigeration lines are under pressure
and should be depressurized before
attempting to make any connections.
WARNING
!
Pan
Piping
Locations
Pod
Fan Plenum
When brazing pipes, be sure to use the
insulation blanket shipped with the
merchandiser to prevent damage to the
plastic case bottom.
CAUTION
!
