Operation; Temperature Settings; Start Up - Thermo Scientific XBF40-MD Series Installation, Operation And Service Manual

Operation

7 Operation
7.1 Temperature

7.2 Start Up

12 Installation, Operation and Service Manual
The factory default temperature setting is -40°C (-40°F).
Settings
CAUTION: The freezers described in this manual are designed for
optimum performance at -40°C (-40°F). The settable range of the unit can
be changed between -30°C(-22°F) to -40°C(-40°F), but it is advisable to call
Technical service before changing the set point, as deviating from
-40°C(-40°F) may compromise the efficiency and efficacy of the freezer.
To change the factory temperature settings, refer to the Section 12 preceding
the controller instructions.
To start up the freezer, complete the following steps:
1. Plug in the power cord.
2. Before starting the unit, pour a liter of water down the central drain, as
shown in the drawing on the next page.
3. The breaker switch is located at the bottom rear of the unit. Switch it to
the ON position. The condenser fan will start immediately. There is a
time delay before the compressor will come on. The delay is indicated
by a flashing snowflake symbol on the display.
4. Set the onboard clock to local time, following the instructions in the
Section 12 preceding the controller instructions.
5. Set defrost times to match your facility schedule, following instructions
in the Section 12 preceding the controller instructions. Defrost takes
approximately 30 minutes. Recommended maximum run time without
a defrost is eight hours; more frequent defrosts may be advisable
depending on usage or ambient conditions.
6. Confirm that the snowflake and fan symbols are illuminated on the
display and that the compressor and fans are running. Note that the
evaporator fan does not run when the main cabinet door is open.
7. Allow the unit to run unloaded for at least 60 minutes before adding any
product.
Thermo Scientific XBF40-MD Series Blast Freezers