REFRIGERANT
The correct type of refrigerant will be
stamped on each case’s serial plate. The case
refrigeration piping is leak tested, factory
sealed and pressurized. Before making refrig-
eration 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 left-
hand end of the case (as viewed from
the front).
After connections have been made, seal this out-
let thoroughly. Seal both the inside and the out-
side. We recommend using an expanding
polyurethane foam insulation.
Multiplexing
Multiplex piping must be run above the top of the
coil package in the area shown. Observe proper
suction pipe joining practices and insulate all
suction piping outside the case to prevent drip-
page from condensate.
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
.
IMPACT Rear Roll-in
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
P/N 0435045A
2-1
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 case
to prevent damage to the case.
CAUTION
!
C
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E
R
W
A
L
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Piping Area
