CLIVET WSAT-YES 18.2, Руководство пользователя

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Leak detection fluids are suitable for most refrigerants, although using detergents containing chlorine should
be avoided as this substance may react with the refrigerant and corrode copper pipes.
If a leak is suspected, all open flames must be removed or switched off.
If a leak is identified that requires brazing, all the refrigerant must be recovered from the system or isolated
(using interception valves) in a section of the system far away from the leak. Oxygen-Free-Nitrogen (OFN) is
then purged through the system both before and during the brazing procedure.
Removal and evacuation
When intervening on the cooling circuit to perform repair work or any other type of work, always follow the
normal procedure. However, considering the risk of flammability, we recommend following the best practices.
Comply with the following procedure:

remove the refrigerant;
 purge the circuit with inert gas;

evacuate;
 Purge again with inert gas;

Interrupt the circuit with interruption or brazing.
The refrigerant charge must be collected in suitable recovery tanks. To make the unit safe, flushing with
Oxygen-free-Nitrogen must be performed. This procedure may have to be repeated multiple times. Do not
use compressed air or oxygen for this operation.
Flushing is obtained interrupting the system vacuum with OFN and filling until the operating pressure is
obtained, then releasing into the atmosphere and restoring the vacuum. This process must be repeated until
there is no trace of refrigerant in the system.
When using the final OFN charge, the system must be vented to the atmospheric pressure to allow the
intervention. This step is essential to perform
brazing operations on the pipes.
Make sure that the vacuum pump intake is not near ignition sources and that there is
suitable ventilation.
Charging operations
In addition to conventional charging operations, the following requirements must be complied with:

When using charging equipment, make sure that the various refrigerants are not contaminated. Flexible
tubes or conduits must be as short as possible to reduce to the minimum the quantity of refrigerant
contained.

Tanks must be kept in a vertical position.

Before loading the system with refrigerant, check that the cooling system is earthed.

Label the system when fully charged (unless already labelled).

Make sure not to fill the cooling system excessively.
 Before recharging the system, the pressure must be tested with OFN. A leak test must be performed
after the charging operations but before commissioning. Before leaving the site, perform an additional
leak test.
Dismantling
Before performing this procedure, it is essential that the technician has become familiar with the equipment
and the relative details.
We recommend employing good practices for a safe recovery of the refrigerants.
Before performing the operation, take a sample of oil and refrigerant should an analysis be necessary
before reusing the regenerated refrigerant. Before performing the operation, check the availability of
electricity.
 Become familiar with the equipment and how it functions.
 Electrically isolate the system.
Before attempting the procedure, check that:
 The mechanical manipulation equipment is available, if necessary, to handle refrigerant tanks;

All the personal protection equipment is available and employed correctly;

The recovery procedure is monitored at all times by skilled personnel;