Refrigeration; Refrigerant; Refrigerant Piping; Line Sizing - Hussmann Q3 User Manual

Refrigeration

Refrigerant

The correct type of refrigerant will be stamped
on each merchandiser's serial plate. The case
refrigeration piping is pressurized with a nitrogen
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 ship-
ment. In the case pressure was not maintained
contact your Hussmann Service Tech for further
assistance.
CAUTION
Refrigeration lines are under pressure.
Refrigerant must be recovered before
attempting to make any connections.
Serial Plate Location

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
18
health codes.
Piping Location