Hoshizaki HUR68A(-D) User Manual
3
Model
Setpoint Temperature
Off Time
(seconds)
On Time
(seconds)
Refrigerator
3 to 30°F
(-5 to -1°C)
90
15
3 to 5°F
(0 to 11°C)
150
15
Freezer
-13 to +19°F
(-5 to -7°C)
(-5 to -7°C)
30
30
c) Automatic Corrections Made During Energy Saving Operating Mode
(1) Temperature Display Correction
When the unit is in energy saving mode and the evaporator fan shuts off, the
temperature at the cabinet thermistor drops due to its close proximity to the evaporator.
Therefore, the temperature at the cabinet thermistor does not accurately reflect the
true cabinet temperature. To compensate for this, the cabinet temperature registered
at compressor shutoff is displayed for 10 seconds after shutoff when in energy saving
mode. After 10 seconds, the cabinet temperature plus 1.8°F (1°C) will be displayed.
Once the compressor turns back on, the display will return to the normal display.
temperature at the cabinet thermistor drops due to its close proximity to the evaporator.
Therefore, the temperature at the cabinet thermistor does not accurately reflect the
true cabinet temperature. To compensate for this, the cabinet temperature registered
at compressor shutoff is displayed for 10 seconds after shutoff when in energy saving
mode. After 10 seconds, the cabinet temperature plus 1.8°F (1°C) will be displayed.
Once the compressor turns back on, the display will return to the normal display.
(2) Temperature Differential Correction
During energy saving mode, the cabinet temperature tends to be higher than during
normal operation because the evaporator fan operates only intermittently when the
compressor is off. The upper setpoint differential for turning the compressor on is
automatically adjusted to compensate.
normal operation because the evaporator fan operates only intermittently when the
compressor is off. The upper setpoint differential for turning the compressor on is
automatically adjusted to compensate.
E. Perimeter Frame Heater
This unit is equipped with a perimeter frame heater. This prevents the formation of
condensate on the front frame of the unit under high humidity conditions.
condensate on the front frame of the unit under high humidity conditions.
Note: On refrigerators with auxiliary code Q6 and later, perimeter frame heater(s)
operate together with the evaporator fan(s).
a) Continuous
The evaporator fan runs constantly (except in defrost). The frame heaters are on
continuously.
continuously.
b) Energy Saving
The evaporator fan runs when the compressor is on, but only intermittently when
the compressor is off. The frame heaters cycle on and off with the evaporator fan
for refrigerators auxiliary code Q6 and later, but are on continuously for refrigerators
auxiliary code Q5 and earlier and all freezers. Intermittent fan operation saves energy by
reducing heat leak, especially around the gasket, and by extending compressor off time.
Fan on/off time is dependent on the setpoint temperature.
the compressor is off. The frame heaters cycle on and off with the evaporator fan
for refrigerators auxiliary code Q6 and later, but are on continuously for refrigerators
auxiliary code Q5 and earlier and all freezers. Intermittent fan operation saves energy by
reducing heat leak, especially around the gasket, and by extending compressor off time.
Fan on/off time is dependent on the setpoint temperature.