VWR VWRC0386A, Instruction Manual

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With the freezer properly installed and connected to power, system set
points can be entered. The following set points can be entered in Settings
mode: Control temperature, high temperature alarm set point, low
temperature alarm set point, and (optional) BUS set point. Default
settings are shown in the table below. See Chart 2-1 for more detail.
Note If the set point is changed and the low temperature and high
temperature alarms are set 10° from the set point, the alarm set points will
be adjusted automatically to maintain a distance of at least 10° from set
point.
s
Caution If the factory installed option water-cooled condenser is present,
do not turn the freezer on without water connected and flowing. Damage
to the refrigeration system could occur within 5 minutes if water is not
connected and flowing on unit start-up
. Refer to Section 6.
s
The freezer has an operating temperature range of -50°C to -86°C,
depending on ambient temperature. The freezer is shipped from the
factory with a temperature set point of -80°C. To change the operating
temperature set point:
1. Press the Mode key until the Settings indicator lights.
2. Press the right arrow until “SET PT = -XX” is displayed in the message
center.
3. Press the up/down arrow key until the desired temperature set point is
displayed.
4. Press Enter to save the set point.
5. Press the Mode key until the Run indicator lights for Run mode or
press the right/left arrow keys to go to next/previous parameter.
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
2-12 Chest Freezer VWR International
Section 2
Overview
Freezer Start-Up
Set Operating
Temperature
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature alarm -90°C
Optional BUS Set Point -60°C