Temperature; Default Temperature Settings; Temperature Setpoint; Adjusting The Temperature Setpoint For Rail Area Cooling - Hoshizaki Steelheart Series Service Manual

B. Temperature
The default temperature scale is °F, but it can be changed to read °C. To change,
see "III.B.3. Changing the Temperature Display Scale (°F or °C)."

1. Default Temperature Settings

a) Rail Area Day Mode (Rail Cover Open) - Rail Control Dial Setpoint: 5 (27°F (-2.8°C)).
b) Rail Area Night Mode (Rail Cover Closed) - Rail Control Dial Setpoint: 35°F (1.7°C)
c) Cabinet Control Module Setpoint: 35°F (1.7°C).
d) Temperature Display Scale: °F.

2. Temperature Setpoint

The temperature setpoint is the value for the average temperature of the rail or cabinet.
During Rail Day Mode, the temperature differential for the compressor (Rail Control
Dial) to turn on and off, is ±3.6°F (±2°C) of the temperature setpoint. For example, for
a temperature setpoint of 27°F (-2.8°C), the compressor comes on at 30.6°F (-1°C),
and the compressor goes off at 23.4°F (-5°C). During Rail Night Mode, the temperature
differential is a set temperature of 8°F above the Rail Control Dial setpoint.
The temperature for the Cabinet fan motor (Cabinet Control Module) to turn on and off, is
±1.8°F (1°C) of the temperature setpoint. For example, for a temperature setpoint of 35°F
(1.7°C), the cabinet fan motor comes on at 36.8°F (2.7°C) and the cabinet fan motor
goes off at 33.2°F (0.7°C) of the temperature setpoint.
Control
Rail Control Dial
Cabinet Control Module
NOTICE! Do not adjust the temperature setpoint more than 2°F (1°C) at a time.
Allow the temperature to stabilize for a minimum of 8 hrs. before making further
temperature setpoint adjustments.

3. Adjusting the Temperature Setpoint for Rail Area Cooling

This appliance utilizes 2 controls to control the temperature in the rail area: The rail
control dial and the rail light sensor. The rail light sensor communicates to the rail control
module whether the rail cover is open or closed. When the rail cover is open, the rail is in
day mode and the rail control module maintains setpoint using the rail control dial. When
the rail cover is closed, the rail is in night mode and the rail control module maintains
an 8°F (4.4°C) setpoint above the day mode rail control dial setting. See next page for
details.
Adjustable Temperature Setpoint
18° to 36°F (-7.8° to 2.2°C)
28° to 40°F (-2.2° to 4.4°C)
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