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P/N 0520677_W
Start up should be performed only by a
qualified technician.
PRIOR TO START UP CHECKLIST
• Is the case connected to a power supply as
specified on the nameplate?
• Is the power on at the breaker panel?
• Are the doors properly torqued? Are they
self closing? Check each door from a fully
open position and from about a 1-inch open
positions.
• Are the evaporator fans plugged in? Do they
rotate freely? (The fans can be inspected by
lifting the deck pans in the bottom of the
cases. Manually rotate each fan to confirm
it is free and visually inspect to confirm that
each fan is plugged into its receptacle.)
• Verify that refrigeration line shutoff valves
are in the back-seated (open) position.
For water-cooled condensing units:
• Verify that water flow valves are open and
water is flowing before starting up case.
• Verify that no air is trapped in water lines.
Purge valves must be located at the highest
location to allow for purging of trapped air.
• Verify that water connections are tight and
not leaking while water system is flowing.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
START UP CHECKLIST
• Once the case is considered ready for start up,
move the main switch on the electrical box to
the "on" position.
This switch is located on the front of the
electrical box, on the top of the case. This
toggle switch turns on the power to the
condensing unit, and all case electrical
components, including anti-sweat heaters,
lights and fans.
• Check the reading on the display; it should
be displaying the case temperature. The
display is located in the center of the front
of the facade above the doors. The displayed
temperature will show the merchandiser's
discharge air temperature.
• Set high and low pressure controls according
to the merchandiser's data sheet.
• Listen for any unusual sounds or events.
For example: evaporator fan blade
interference, compressor trip on overload,
or high head due to excessive ambient
temperature, circuit breaker trip, etc.
• Check the fan at each door to ensure all
fans are running. The discharge air output
at the top inside front of the case should be
relatively even across the length of the case
(honeycomb area).
Excessive ambient conditions may cause
condensation and therefore sweating of doors.
Facility operators should monitor doors and floor
conditions to ensure safety of persons.
Freedom Line Reach-in
4-3
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