Metos SF 500, Installation And Operation Manual, Page: 8 / 25

13.2.2009 Rev. 4.0
Operation instructions
4
4. Operation instructions
4.1 General
4.1.1 Freezing
The performance of the blast freezer is based on efficient air circulation. The fan located
inside the cabinet rotates chilled air through air channels on the cabinet side walls. The
desired freezing time can be adjusted with the timer between 0 to 12 hours. While freezing
is in operation, the cabinet always functions at maximum output, and the thermostat and
automatic defrost are not in operation. When the preset freezing time has been reached,
the cabinet starts to function as a conventional freezer.
Make sure that the products are suitable for freezing. The required freezing time depends
on how fully loaded the cabinet is as well as on the properties of products and containers.
By trying various combinations you will find a suitable freezing time for each situtation.
The capacities below are indicative values assuming that the product thickness is max. 50
mm. By reducing the amount to be freezed you will reach faster freezing times.
4.2 Operation
4.2.1 Freezing
Freezing can be done as follows:
• Switch on the appliance at the main switch and wait until the cabinet temperature
falls to the correct storage temperature (factory setting –20 °C).
• Put the products to be frozen in the cabinet and close the door.
• Adjust the desired freezing time at the timer. The compressor will start.
• When the products have been frozen, they can be removed from the cabinet and
placed into appropriate storage. The blast freezer can also be used for contempo-
rary storage of frozen products while leaving the main switch on.
Cabinet type Change of temperature Time Maximum weight
SF 500 0 °°C...–18 °C 12 h 25 - 30 kg
SF 500 0 °C...–18 °C 6 h 15 kg
SF 700 0 °C...–18 °C 12 h 75 kg
SF 700 0 °C...–18 °C 6 h 30 kg