Usage Conditions - Arneg MPM 2 Manuel D'installation Et De Service

MPM2 - Medium Power Multisystem
English
There is a rating plate on the unit (Rif. 1) with all the data regarding characteristics. We recommend that you
keep a copy of this data in the office of the employees assigned to supervise and maintain these systems:
1 Product commercial name
2 Product code
3 Serial number
4 Power supply voltage - Number of phases - Power supply frequency
5 Maximum power absorbed
6 Maximum current absorbed
7 Refrigerating power supplied
8 Maximum current absorbed achievable by the machine in transitory conditions
9 Refrigerating gas type
10 Maximum reachable pressure
11 Reference evaporation pressure
12 Reference condensation pressure
13 Machine production work order number
14 Order number for machine production
15 Production year
16 EC mark with identification number of the Notified Organization, in accordance with Directive 97/23/EC
In the case of a request for technical assistance, it is enough to communicate the following for identification
of the unit:
- product name (Fig. 3 - 1); serial number (Fig. 3 - 3); work order number (Fig. 3 - 13).

9. Usage conditions

MPM2 refrigeration units were designed and created so as to guarantee the utmost safety during installation
and operation.
In order to guarantee safety and proper unit functioning, it is important to carefully follow the indications in the
Manual, avoiding operations which could cause malfunctions and risks for the user.
We recommend that the following procedures are followed with extreme care:
- Refer to the technical documentation for any operation to be carried out on the unit. Any operation not
found here must be authorized by the manufacturer.
- The "Machine Room" must have dimensions that are appropriate for the unit and respect the EN 378-2
norms.
- Before carrying out any operation, make sure that:
- Electric power has been cut off from the machine, using the selector on the control panel
- Make sure that no parts are under pressure or connected to the power supply
- Check that the temperature of the various parts is not hot enough to cause burns
- Place a sign on the control panel indicating the unit state so as to avoid undesired start ups.
THE FOLLOWING ACTIONS SHOULD BE AVOIDED AT ALL COSTS:
- Action: Closing the compressor drain tap during operation
- Risk: Compressor head explosion
- Action: Closing suction tap during operation
- Risk: Compressor damage
- Action: Closing oil tap
- Risk: Compressor damage
- Action: Adjusting compressor and circuit screws and bolts while under pressure
- Risk: Structural damage and leakage of pressurized fluids
- Action: Powering the machine during maintenance
- Risk: Risk of electrocution for operators, damage to unit
- Action: Maintenance with power panel open and powered
- Risk: Risk of electrocution for operators
- Action: Replacing protective devices (fuses, thermal switches, etc.) with different models
- Risk: Damage to users, improper intervention, possible loss of coordination of
protective devices
- Action: Failure to check tightening torque of terminal board screws
- Risk: Damage to electrical parts
- Action: Errors in programming the electronic unit
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