omi PRE 15, Use And Maintenance Manual, Page: 14 / 35

Cod. 710.0048.31.01 – Rev.1A – 02.2018
ENGLISH
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1. GENERAL INFORMATION
1.1 FUNCTIONAL DESCRIPTION
The refrigeration system have been designed to cool, with minimal overall dimensions, the compressed nitrogen to
approxi 5°C ÷ 10°C
.
The operation principle of the refrigerator described in this manual is shown in the nitrogen and refrigeration circuit
diagrams (attachment A).
A system overload not exceeding the maximum operative limits can worsen the operational
performances of the refrigerator (high dew point), but it will not affect its safety.
The electric diagram (attachment B) shows the minimum protection degree IP 42. The user must
provide the refrigerator with a line protection and a ground terminal.
1.2 USE OF THE MACHINE IN SAFE CONDITIONS
This system has been designed and manufactured in compliance with the European safety directive in force, therefore
any installation, use and maintenance operations must be performed respecting the instructions contained in this
manual.
1. Only qualified personnel shall be permitted to adjust, perform maintenance or repair this refrigerator.
2. Read all instructions completely before operating unit.
3. Pull main electrical disconnect switch and disconnect any separate control lines, if used, before
attempting to work or perform maintenance on the unit.
4. Do not attempt to service any part while machine is in an operational mode.
5. Do not attempt to remove any parts without first relieving the entire nitrogen system of pressure.
6. Do not attempt to remove any part of the refrigeration system without removing and containing
refrigerant in accordance with the EPA and local regulations.
7. Do not operate the refrigerator at pressures in excess of its rating.
8. Do not operate the refrigerator without guards, shields and screen in place.
9. Inspect unit daily to observe and correct any unsafe operating conditions.
2. INSTALLATION
2.1 ACCEPTANCE AND HANDLING
Upon receiving your refrigerator, please inspect the unit closely. If rough handling is detected, please note it on your
delivery receipt, especially if the refrigerator will not be uncrated immediately. Then obtain the freight carrier's signed
agreement to any noted damages: this is a precondition for any insurance claims by the customer.
It is mandatory to keep the refrigerator always in vertical position, as indicated by the symbols present on the packaging.
For handling, use devices having sufficient capacity for the weight of the machine.
Remove the packaging after having positioned the refrigerator in the installation site. For unpacking, refer to section 2.3.
Under no circumstances should any person attempt to lift heavy objects without proper lifting equipment (i.e., crane,
hoist, slings or fork truck). Lifting any unit without proper lifting equipment, may cause serious injury. Use fork lift channels
where provided.