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This freezer has been factory set to run at -30°C. The LR-5 TempGuard may require
adjustment depending on the final ambient operating condition. The freezer has
reserve rangeand will average –30°C, depending on load and ambient temperature.
Plug into a standard 110-120 volt electrical outlet. The unit will start to operate. It will
require 5 amps. The freezer's operation will be extremely quiet due to the unique
design of the compressor system.
As with the –20 models, pre-cool unit before placing any product into the chamber. The
temperature will reach -30°C in less than four hours; however, let the chamber cool for 8
hours minimum to allow for total heat removal from the cabinet.
Again, this is a manual defrost system. If ice build up is present ¼ inch or more on the
fixed shelves, defrosting is recommended. Large ice build up will reduce cooling
efficiency.
If this system is equipped with a temperature display or alarm system it is not
uncommon to observe a rise in temperature on the display following a door opening.
Unless the door is left open for long periods of time this should not affect product
temperature. The temperature display is independent of the thermostat that is actually
controlling the off/on cycling of the compressor. Door opening will greatly affect air
temperature but generally does not affect product temperature.