Part-3. Contn:
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Removing Cabinet Back
To remove the cabinet back, remove two screws near the base (one on each side) and two inset screws at the top just under the handle.
Removing Cabinet Front
To remove the cabinet front, remove two screws near the base (one on each side) adjacent to the rear cabinet screws and two inset screws at the top just under the handle. It is necessary to remove the cabinet back to access the top screws.
Removing Control Panel
Eight screws hold the control panel in place; the front cover must be removed to access these screws. It is necessary to remove the electrical wiring and pneumatic tubing to fully release the control panel.
Main Structure
The weight and forces of the internal components rest solely on four parts: the main structure, the compressor plate, the base-plate and the base. These parts were specially designed and formed. They should never require replacement under normal use.
Caster Replacement
The casters are a push in type that does not require any fastener. Lay the device on its back to access the casters from the bottom. Pull them straight out away from the bottom.
Compressor
The compressor is the pump within the oxygen concentrator that supplies air to the separation process performed by the sieve beds. The pressure generated by the compressor forces oxygen to flow out of the top of the sieve columns. The compressor is the likely cause of two potential specific problems:
- An insufficient amount of air is supplied to the process, and
- An excessive sound level.
Compressor output refers to how much compressed air the compressor can produce. This depends upon the model of the compressor, length of stroke, piston diameter, speed of rotation and condition of seals. The cup seals form the seal between the piston and the cylinder wall. As the cup seals wear, the output begins to gradually decrease. This reduction in compressor output results in less air, and thus less oxygen, entering the sieve beds. Therefore, the production of oxygen decreases. Because this drop in oxygen production occurs over a long period of time, preventive maintenance on the compressor is not required.
Sound Level
The sound level is largely determined by the condition of the compressor’s bearings. There are four bearings located within the compressor that allow the inner components of the compressor to rotate. If the bearings wear to the point that they become loose and noisy, the compressor becomes noticeably loud and needs servicing. Primarily its operating temperature determines the life of a compressor. It is extremely important that the cabinet air filters are cleaned and replaced as required.