hussmann P/N 0420057_B - Manual (Page 19)

REFRIGERANT
The correct type of refrigerant will be stamped
on each 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 cases operating on the same refrigera-
tion system may be run from case to case. D
O
NOT RUN REFRIGERANT LINES THROUGH CASES
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 clear-
ance beneath the display pans. The intercon-
necting piping may be run outside the case.
P/N 0420057_B 2-1
Service Merchandisers
HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.
REFRIGERATION / ELECTRICAL
Refrigerant vapor is hazardous to your health
and can cause death.
Avoid breathing refrigerant and lubrication
vapor or mist. Exposure may irritate eyes,
nose and throat. If accidental system dis-
charge occurs,ventilate work area before
resuming service.
Always wear safety goggles and protective
gloves when working with refrigerants.
Contact with refrigerant may cause injury.
Disconnect hoses with extreme caution! All
hoses may contain liquid refrigerant under
pressure.
Be sure that any room where you are working
is thoroughly ventilated, especially if a leak
is suspected.
Read all safety information regarding the safe
handling of refrigerant and refrigerant oil,
including the Material Safety Data Sheet.
MSDS sheets can be obtained from your
refrigerant supplier.
Refrigeration lines are under pressure
and should be depressurized before
attempting to make any connections.
When brazing pipes, be sure to use the
insulation blanket shipped with the
merchandiser to prevent fire or damage
to the plastic case bottom.
WARNING
!
Fan
Coil
Piping Location
Display Pan