Warmtec ODT-25N, Руководство пользователя, Страница: 53 / 56

• purge again with inert gas;
- Make sure the refrigera on system is grounded before charging the system with refrigerant.
- Tag the system a er loading is complete (if not already flagged).
- Be careful not to overfill the refrigera on system. Pressure test with OFN must be performed before
recharging the system. The system should be tested for leaks a er charging is complete but before
commissioning. Another leak test must be performed before leaving this site.
• purge the circuit with inert gas;
- Ensure that various refrigerants will not be contaminated when using the charging equipment. Keep
hoses or lines as short as possible to minimize the amount of refrigerant they contain.
9. DISASSEMBLY
7. REFRIGERANT REMOVAL
8. CHARGING PROCEDURE
• take a break;
Before performing this procedure, it is important that the technician is fully familiar with the equipment
and all the details. It is recommended that all refrigerants be safely recovered. Before performing the task,
an oil and refrigerant sample should be taken in case analysis is required before reusing the recovered
refrigerant. It is essen al that electrical power is available before star ng the job.
Ven la on procedures must be used when the refrigerant circuit is breached for repair - or otherwise.
However, it is important to follow safety rules, since flammability is possible. Follow the procedure below:
• remove the refrigerant;
The amount of refrigerant must be recovered to the appropriate cylinders. The system must be "flushed"
with OFN to keep the device safe. This process may need to be repeated several mes. Do not use
compressed air or oxygen for this task. Rinsing should be achieved by breaking the vacuum in an OFN
system and con nuing to fill un l working pressure is reached, then ven ng to atmosphere and finally
lowering to vacuum. This process should be repeated un l there will be no refrigerant in the system. If a
final charge of OFN is used, the system should be vented to atmospheric pressure to allow work to be
carried out. This opera on is absolutely essen al if brazing is to be carried out on the pipelines. Make sure
that the outlet of the vacuum pump is away from sources of igni on and that ven la on of the working
area is available.
• open the circuit by cu ng or soldering.
In addi on to the general charging rules, the following requirements must be observed.
- Cylinders must be kept in an upright posi on.
- all personal protec ve equipment is available and used correctly;
- the recovery process is always supervised by a competent person;
b) Due to the flammability of R290 refrigerant, protect the electrical system of the appliance well
- recovery equipment and cylinders comply with the relevant standards.
a) Familiarize yourself with the equipment and its opera on
- mechanical handling facili es are available to handle refrigerant cylinders if required;
c) Before star ng the procedure, make sure that:
User manual - dehumidifier
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