eta 90000 Fainer 2630 Air Dehumidifier User Manual

: June 13, 2024
: ETA

Table of Contents

SERVICE MANUAL
References
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eta 90000 Fainer 2630 Air Dehumidifier User Manual

SERVICE MANUAL

This manual is destined for service employees of ETA automatized service organizations. It is not destined for usual users of this appliance. Before any service, please read both this Service Manual and the Operating Instructions Manual, which also contains important information for service employees. Save this Service Manual together with the Operating Instructions Manual so that it may be used in the future for a possible service.

WARNING

Don’t use agents for defrosting or cleaning which are different from the recommended by the manufacturer.
The appliance has to be stored in a room where there is no permanently-operated sources of inflammation (for example, open fire, operated gas appliances, electric operated heating devices).
Don’t pinch, don’t burn. it
Remember that no smell of coolant is allowed.
The appliance has to be installed, operated and stored in premises with the floor area more than 4 m2 .
The appliance has to be stored in well-ventilated premises.
With regard to the character of the appliance and presence of coolant, store it in a room where there is no permanently-operated sources of inflammation (for example, open fire, gas appliances in operation, electric heating devices in operation). At the same time, don’t damage the appliance, don’t prickle and don’t burn. You may not feel coolant or its possible leakage.
Each person working with the cooling circuit or with its input, must have a valid certificate issued by a relevant accredited assessing authority, which approves the competence of these persons to manipulate safely with these coolants.
Maintenance and repairs require assistance of other qualified personnel skilled in the use of flammable coolants.

Check of premises
Before working with the system containing flammable coolants, it is necessary to carry out safety checks to ensure that risk of ignition is minimized. In case of repairs of the coolant system, it is necessary to observe the following measures before starting the work.

Work procedure
A controlled procedure must be used during the work to minimize a risk of presence of flammable gases or fumes during the work.

Work space in general

All maintenance and other personnel working in the field must be instructed in the character of the work to be performed. It is necessary to avoid work in confined premises.
The area around the work space should be separated. Ensure that conditions in this field were safety upon the use of flammable materials.

Check of presence of coolant

The area must be checked with the help of a suitable coolant detector before and during the work to ensure that the technician knows potential flammable atmosphere.
Ensure that a leakage detection device suitable for the use with flammable coolants is used; it means ensure that there was no sparkling, that it was adequately sealed or was internally safe.

Presence of an extinguisher

If any work with the use of heat has to be carried out with the cooling appliance or with any related parts, a corresponding extinguishing device must be at disposal.
Have at disposal a dry-powder or CO2 extinguisher.

No ignition sources

No person working on the cooling system, such as opening of any pipeline which contains or contained flammable coolant, may use ignition sources which could lead to the danger of fire or explosion.
All possible ignition sources, including ignition of a cigarette, should be kept in a sufficient distance from the place of installation, repair, removal and liquidation, because flammable coolant may be eventually emitted into the surroundings during the work.
Before work, it is necessary to explore the space around the appliance to avoid a danger of combustion or ignition. The area has to be marked by a “No smoking” sign.

Ventilated area

Before entering the system or before any work with the use of heat, ensure that the area was open or that was sufficiently ventilated.
Ventilation has to be ensured during the all work.
Ventilation should reliably disperse any emitted coolant and the best is to release it into the atmosphere.

Check of the cooling appliance

When replacing electrical components, they have to be suitable for the respective purpose and for the correct specification.
During all the time, follow the maintenance and service instructions of the manufacturer. In case of any doubtfulness, consult it with the technical department of the manufacturer.

The following checks are to be applied for the appliances using flammable coolants:

The following checks are to be applied for the appliances using flammable coolants:
Verify that the capacity of the filling corresponds to the size of the room in which parts containing coolant are installed;
Verify that the ventilation device and outputs work adequately and aren’t blocked;
In case of use of an indirect cooling circuit, it is necessary to check that the secondary circuit doesn’t contain coolant;
Verify that designation of the appliance continues to be well-visible and readable. Designation and marks which are not readable have to be repaired.
Verify that both the cooling pipeline and components are installed in such a position, in which is improbable that they could be exposed to any substance, which may corrode components containing coolant, unless these components are made from materials resistant to corrosion or are suitably protected against corrosion.

Check of electrical devices

Repair and maintenance of electrical components should include safety checks and inspection of components.
In case of any defect which could endanger the safety, no source of electrical energy may be connected in the circuit as long as the problem is not satisfactorily solved.
Unless it is possible to fix the defect immediately but operation has to be continued, it is necessary to take appropriate temporary solution.
It is necessary to inform the owner so that he/she instructs all participants.

Initial safety checks have to ensure the following:

Discharge of condensers has to be performed by a safety way to avoid sparkling;
Provision that neither functional electrical components nor electric line can be opened during refilling, renewing or cleaning the system;
Verification that the earthing is not int

Repairs of sealed components

When repairing sealed components, before removal of the sealing covers etc., all sources of electric energy have to be disconnected from the device to be repaired.
If there is at disposal electric power supply for the appliance during servicing, it is necessary to place a permanently working form of leakage detection on the most critical place, which warns of a potentially dangerous situation.
Special attention has to be paid to the following facts in order to ensure that the cover wasn’t modified during work on electrical components so that it influenced the level of protection.
It’s about, for example, damage of cables, excessive number of connections, clamps which weren’t made according to the original specification, damage of sealing, wrong fixation of gaskets, etc.
Make sure that the appliance is reliably assembled.
Make sure that there is no damage of the seal or sealing materials so that they no more met the purpose of protection against intrusion of flammable air.
Spare parts have to correspond to the manufacturer’s specifications

REMARK
The use of a silicone seal may prevent from efficiency of some types of leakage detecting devices. Safe components in principle doesn‘t need to be insulated before working with them.

Repair of internally dangerous components

Don’t use any permanent inductive or capacitive load of the circuit without ensuring that the allowed electric tension and current for the respective device cannot be exceeded.
Internally safe components are only such types, on which it is possible to work while they are operated in the presence of the flammable atmosphere. A test device should be correctly dimensioned.
Always replace components by parts specified by the manufacturer.
Other parts may cause ignition of coolant in the atmosphere as a result of untightness.

Cabling

Check whether the cabling can’t be exposed to wear, corrosion, excessive pressure, vibrations, sharp edges or other unfavorable effects on the living environment.
When inspecting, effects of aging or permanent vibrations from the sources, such as compressors or ventilators, have to be taken into account.

Detection of flammable coolants

In no circumstances, when searching or determining leakage of coolant, it is not allowed to use ignition sources.
It is not allowed to use a metal-halide burner (nor any other detector using open fla

Methods of leakage detection
The following methods of leakage detection are considered to be acceptable for the systems containing flammable coolant:

Electronic leakage detectors should be used for the detection of flammable coolant, but their sensitiveness doesn‘t need to be adequate, or they may require repeated calibration. (The detecting device should be calibrated in an area without coolant.)
Please make sure that the detector is not a source of potential ignition and that it is suitable for the used coolant.
The leakage detection device should be adjusted for the percentage value of LFL of the coolant and should be calibrated for the used coolant and a corresponding percentage of gas will be confirmed (not more than 25 %).
Liquids for leakage detecting are suitable for the use with most of coolants, but avoid using of cleaning agents containing chlorine, because chlorine may react with coolant and corrode copper pipelines.
If there is a suspicion of any untightness, all open flames must be removed/extinguished.
If coolant leakage requiring hard soldering is detected, all coolant must be drained from the system or must be insulated (by means of stop-valves) in part of the system remote from the leakage.
The system should be filled with oxygen-free nitrogen (OFN) before and after the soldering process.

Removal and withdrawal

In case of intrusion into the cooling circuit for the purpose of repairing – or for any other purpose – conventional procedures have to be applied.

It is however important to observe well-proven procedures, because flammability has to be taken into consideration.

Follow the following procedure:

Remove coolant;
Clean up the circuit with inert gas;
Withdraw;
Repeatedly clean up it with inert gas;
Open the circuit by cutting or hard soldering.
It is necessary to place the cooling filling back into correct regenerative containers.
The system must be “rinsed out” with the help of OFN to ensure protection of the appliance.
Repeat this process even several time, if necessary.
Neither compressed-air nor oxygen may be used for these purposes.
Rinsing is to be performed by disturbing vacuum in the system with OFN with continuing filling as long as the work pressure is reached, by consequential draining and eventually by creating vacuum.
This process is to be repeated until any coolant remains in the system. While using the final filling of OFN, the system should be deaerated to the atmospheric pressure to enable functioning.
This operation is absolutely necessary in case of hard soldering.
Please make sure that the output for the vacuum pump is not situated near the ignition sources and that ventilation is accessible.

Procedures of refilling

Together with usual processes of refilling, it is necessary to observe the following requirements:

Ensure that while using a filling device no contamination of different coolants occurs.
A hose or pipe should be as short as possible to minimize quantity of coolant which is inside of it.
The filling container must be in a vertical position.
Before refilling the system with coolant, make sure that the cooling system is earthed.
After finishing the refilling, mark the system by a label (unless it is marked). Special attention has to be paid to ensuring that the system is not overfilled.
Before repeated refilling the system, it is necessary to check pressure by means of OFN.
After refilling is finished, but before its commissioning, it is necessary to check tightness of the system.
Perform consequential test of tightness before leaving the place.

Decommissioning

Before this procedure is carried out, it is necessary that a technician becomes familiar with the appliance and all its details.
We recommend well-proven methods for the reliable removal of whole coolant.
Before performance of this step, withdraw a specimen of oil and coolant for a possible need of analysis before the repeated use of the obtained coolant. It is important that electric energy was at disposal before starting the step
a) Familiarize yourself with the appliance and its operation.
b) Electric disconnection of the system.
c) Before you attempt to perform the procedure, make sure that:
in case of need, there is at disposal a mechanical handling equipment to ensure manipulation with the pressure vessels of coolant;
There is at disposal all personal protective equipment and they are used correctly;
The process of withdrawal is permanently under supervision of a competent person;
The degradation device and vessels correspond to the appropriate norms.
d) If it is possible, drain the cooling system.
e) If it is not possible to reach underpressure, create a collecting pipeline so that coolant may be removed from different parts of the system.
f) Make sure that the pressure vessel is situated in the values before the renewal.
g) Start the appliance for renewing and use it in accordance with the manufacturer’s instructions.
h) Don’t overfill the pressure vessels. (Not more than 80 % of the volume capacity of the filling).
I) Don’t exceed the maximum work pressure of the pressure vessel, even temporary.
j) If pressure vessels were correctly filled and the process was finished, make sure that the pressure vessels and the appliance are correctly withdrawn and that all stop-valves on the appliance are closed.
k) Recycled coolant mustn‘t be filled into another coolant system, it is not cleaned up and checked.

Designation (labeling)

The appliance must be marked that it is drained and without coolant.
The label must be marked by a date and signed.
Make sure that the appliance has labels which specify that the appliance contains flammable coolant.

Liquidation

When draining coolant from the system, no matter if for repairing or decommissioning, we recommend that you use well-proven procedures for a reliable removing the whole coolant.
When replacing coolant into pressure vessels, make sure that only suitable pressure vessels are used for the collection of coolant.
Make sure that there is at disposal a correct number of pressure vessels for collecting the whole filling of the system.
All pressure vessels which have to be used are destined for renewed coolant and marked for this coolant (it means, special pressure vessels for the collection of coolant).
Pressure vessels have to be equipped with a pressure safety-valve and a corresponding stop valves in a good serviceable state.
These pressure vessels are to be removed and, if is possible, have to be cooled before collection.
The collecting device must be in good serviceable state in accordance with the set of instructions related to the equipment, which is at arm’s length and must be suitable for the collection of flammable coolants.
Besides of that, a set of calibrated scales in good serviceable state has to be at disposal.
The hoses have to be completed with corresponding couplings and in good technical state.
Before using the collecting device, check that it is in sufficient serviceable state, that is correctly maintained and that all associated electrical components are tightened to avoid ignition in the case of coolant leakage.
In case of doubtfulness, contact the manufacturer.
The obtained coolant must be returned to the supplier of coolant in a correct pressure vessel and a corresponding remark about transportation of waste has to be prepared.
Don’t mix coolants in collecting devices (first of all in pressure vessels).
If it is necessary to remove compressors or compressor oils, be particular about removing them at an adequate level to ensure that coolant doesn’t remain in lubricant.
The process of removing must to be performed before the return of the compressor to the supplier.
Only electrical heating of the compressor body should be used for the acceleration of this process.
Oil drainage from the system has to be carried out safely