17
Refrigeration
Refrigerant
The correct type of refrigerant will be stamped on
each merchandiser’s serial plate.
The case re-
frigeration piping is pressurized with a nitro-
gen holding charge, leak tested and factory
sealed.
Before making refrigeration hookups,
depress universal line valve (Shraeder Valve)
to ensure that coils have maintained pressure
during shipment. If in the case pressure was
not maintained, contact your Hussmann Service
Tech for further assistance.
Serial Plate
Location
CAUTION
Refrigeration lines are under pressure.
Refrigerant must be recovered before
attempting to make any connections.
Refrigerant piping
The refrigerant line connections are at the right
hand end of the case (as viewed from the front)
beneath the display pans. The merchandiser will
beforehand ensure an earlier cut hole through
the pod to exit the merchandiser for the refrigera-
tion lines. After connections have been made,
make certain to seal this outlet thoroughly if not
sealed at factory already. Seal both the inside
and outside. We recommend using an expanding
polyurethane foam insulation.
Line Sizing
Refrigerant should be sized as shown on the
refrigeration legend that is furnished for the store
or according to the ASHRAE guidelines.
Oil Traps
P-traps (oil traps) must be installed at the base
of all suction line vertical risers.
It is the contractor's responsibility to install
case(s) according to local construction and
health codes.
