Follett REF Series, Инструкция по установке и обслуживанию

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Controller operation
In normal operation the controller displays cabinet temperatures
in °F (default) or user-selected °C. °C temperatures are displayed
to 1 decimal point.
A snowfl ake LED displays when the compressor is running.
The controller is pre-programmed with a 34 F set point which
provides a compressor cut-in at 38 F and cut-out at 34 F. This
may not meet your specifi c application needs. For example, many
pharmaceutical manufacturers recommend that their refrigerated
medications be stored between 36 F and 46 F. Instructions for
changing the set point are found below.
Refer to the chart below for the set point for your application’s required temperature range:
All set points have a 4 F differential (HY setting on the controller). The 4 F differential means that with a 34 F set
point, for example, the compressor will turn off at 34 F and turn on when it reaches 38 F.
Because there is still refrigerant in the evaporator, there can be an additional 1 F - 1.5 F of downward “drift” in
temperature after the compressor turns off. The temperature may momentarily display as low as 32 F (32.9 F and
below rounds down to 32 F) before beginning to rise again.
°F
38
Fig. 7
Set point Cut-in/ Cut-in/ Normal display
°F/°C Cut- out °F Cut-out °C range temperature °F/°C
34° / 1.1° 38 ° / 34 ° 3.3 ° / 1.1 ° 32 ° - 38 ° / 0 ° - 3.3 °
35° / 1.7° 39 ° / 35 ° 3.9 ° / 1.7 ° 33 ° - 39 ° / .6 ° - 3.9 °
36° / 2.2° 40 ° / 36 ° 4.4 ° / 2.2 ° 34 ° - 40 ° / 1.1 ° - 4.4 °
37° / 2.8° 41 ° / 37 ° 5 ° / 2.8 ° 35 ° - 41 ° / 1.7 ° - 5 °
38° / 3.3° 42 ° / 38 ° 5.6 ° / 3.3 ° 36 ° - 42 ° / 2.2 ° - 5.6 °
39° / 3.9° 43 ° / 39 ° 6.1 ° / 3.9 ° 37 ° - 43 ° / 2.8 ° - 6.1 °
40 ° / 4.4 ° 44 ° / 40 ° 6.7 ° / 4.4 ° 38 ° - 44 ° / 3.3 ° - 6.7 °
41 ° / 5 ° 45 ° / 41 ° 7.2 ° / 5 ° 39 ° - 45 ° / 3.9 ° - 7.2 °
To display temperature cut-out
STEP INPUT DISPLAY
1 Press and release SET Current cut-out temperature will display for approximately 5
seconds. Display will return to current refrigerator temperature.
To change temperature cut-out
STEP INPUT DISPLAY
1 Press and hold SET for 3 seconds Current cut-out temperature displayed and °F will fl ash.
2 Press UP or DOWN arrows to
desired cut-out temperature per
above table New cut-out temperature displayed.
3 Press and release SET New cut-out temperature blinks three times, then current
refrigerator temperature will display.