Sequence Of Operation - Hussmann NAV Series Installation & Operation Manual

P/N 2400204_H
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NOTE: The 65°C Version Controller includes a Parameter Code Number. This number indicates what program has been
loaded into the controller. When the Controller is first powered up or is turned off and then back on a 2 digit Parameter
Code Number will display for 3 seconds. Then the Self Check will Start.
1a. The Safe-NET Parameter Code is for NAV cases is 57.
If the case is warm at initial start-up, the defrost will be initiated and will terminate almost immediately. (Display will lock in
current temperature when defrost is initiated.)
1b. If the case is cold (as if it is turned off and then back on), the defrost cycle will continue until the termination
temperature is reached or the fail-safe time has expired.
2
The compressor will start 10 seconds after the power is applied.
3
The compressor will run for 10 minutes. Then, defrost will be initiated.
4
During defrost, the display will show the temperature before defrost, and it will continue to show this
temperature for 1 hour. Compressor will turn back on once coil is defrosted.
5
The compressor will continue to run until it reaches its cut-out temperature (pull down).
6
The refrigeration cycle will continue until the next scheduled (8 hours) or demand defrost.
7 3
4
and will repeat until power is interrupted.
NOTE: If power is interrupted, sequence will start at
defrost will reset.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Sequence of Operation — LTH Merchandisers
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. Defrost will be initiated and the time to subsequent
Service Deli Merchandisers
2-7