P/N 9FQ6P11007900_B 2-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Open Vertical Merchandisers
The controller controls refrigeration temperature. The controller is factory installed in the control
panel mounted on the merchandiser’s fascia.
Discharge air temperatures should be measured at the center of the honeycomb. Defrosts are time
initiated and temperature terminated for these models. The defrost setting is set in the factory.
The product application is factory set for Med. Temp. - NSF7 as shown below.
CONTROLS AND ADJUSTMENTS
Controller
Set Point ( ° F )
Defrost Frequency
( per day )
Type of Defrost Temp. Termination Failsafe time ( min )
23 ° F ( - 5 ° C )
19 ° F ( - 7 ° C )
28 ° F ( - 2 ° C )
25 ° F ( - 4 ° C )
Note: The cases are shipped out from factory with controller settings to comply with NSF 7 requirements.
6
Off Time 45 ° F ( 7 ° C ) 50
MDN3575B1A/S1A 25 ° F - 27 °F ( -4 °C to -3 °C )
MDN4775B1A/S1A 25 ° F - 27 °F ( -4 °C to -3 °C )
0
10
20
30
40
50
60
1
45
89
133
177
221
265
309
353
397
441
485
529
573
617
661
705
749
793
837
881
925
969
1013
1057
1101
1145
1189
1233
1277
1321
1365
1409
Honeycomb Discharge air temp MDN3575 B1A @ NSF
Type 1 ( ° F )
Discharge Air Temperature
( Avg Ref mode )
Product Application
Model
Controller
Set Point ( ° F )
Defrost Frequency
( per day )
Type of Defrost Temp. Termination Failsafe time ( min )
25 ° F ( - 4 ° C )
Note: The cases are shipped out from factory with controller settings to comply with NSF 7 requirements.
6
Off Time 45 ° F ( 7 ° C ) 50
MDN3575B1A/S1A 25 ° F - 27 °F ( -4 °C to -3 °C )
MDN4775B1A/S1A 25 ° F - 27 °F ( -4 °C to -3 °C )
0
10
20
30
40
50
60
1
45
89
133
177
221
265
309
353
397
441
485
529
573
617
661
705
749
793
837
881
925
969
1013
1057
1101
1145
1189
1233
1277
1321
1365
1409
Honeycomb Discharge air temp MDN3575 B1A @ NSF
Type 1 ( ° F )
Discharge Air Temperature
( Avg Ref mode )
Product Application
Model
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