Hoshizaki rh1-aac Supplementary Manual
17
D. Compressor Protector
When a combined temperature/amperage value is above the limit specified by the
compressor manufacturer, a protector will operate independently, turning off the
compressor. The compressor will restart when this protector has reset.
compressor manufacturer, a protector will operate independently, turning off the
compressor. The compressor will restart when this protector has reset.
Note:
1. Compressor protector resets automatically.
. If the condenser fan is operating and the compressor is off, it is likely that the
. If the condenser fan is operating and the compressor is off, it is likely that the
protector has operated.
E. Safety Devices
1. Pressure Switch
When pressure on the high-side of the refrigeration circuit is detected to be above
a preset limit, a pressure switch will activate causing power to be interrupted to the
compressor relay. This power interruption will shut down the compressor. The pressure
switch will reset automatically. When the pressure switch resets, power will be resupplied
to the compressor. See "VI. Wiring Diagrams" for preset values.
a preset limit, a pressure switch will activate causing power to be interrupted to the
compressor relay. This power interruption will shut down the compressor. The pressure
switch will reset automatically. When the pressure switch resets, power will be resupplied
to the compressor. See "VI. Wiring Diagrams" for preset values.
2. Defrost Protection
For freezers, primary defrost termination is controlled by the defrost thermistor. However,
two additional safeties are also present:
two additional safeties are also present:
1) Time Termination - 1 hour maximum
) Safety Defrost Thermostat - In-line with the heaters and independent of the control
) Safety Defrost Thermostat - In-line with the heaters and independent of the control
module.
F. 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. If operating the
unit under conditions where condensate will not form, these heaters may be turned off
using the switch on the control box.
condensate on the front frame of the unit under high humidity conditions. If operating the
unit under conditions where condensate will not form, these heaters may be turned off
using the switch on the control box.