Emerson Fluid Chiller Anleitung zur Fehlerbehebung PDF herunterladen (Seite 31)

System Protectors

Emerson Climate Technologies

Acid Pick-Up Capability

Various organic acids result during the decomposition

of the refrigerant and oil in a system. This decomposition

can be the result of moisture in the system, excessive

temperatures, air, or exposure to foreign substances in

the system. It is important that acid in a system is ab-

sorbed as soon as it is formed to prevent the acid from

causing system damage. Activated alumina is the most

popular of the desiccants used to remove acid.

Tests have shown that the amount of acid and resin

pick-up of an adsorbing agent is almost proportional to

the weight of the desiccant. Size or granulation makes

little difference.

There is no industry-approved method for rating acid

removal. So weight of the desiccant provides the handi-

est measure.

Wax Removal

The ability of a lter drier to remove wax and resins is

important in low temperature applications that use R-22.

Wax when present in a system tends to solidify on valve

seats and pins, resulting in system malfunctions.

Flow Rate

Published ow rates for lter driers are established in

accord with ARI Standard 710 for liquid line driers, and

ARI Standard 730 for suction line driers.

Liquid line and suction line lter driers are often

referred to as System Protectors because they remove

harmful elements from the circulating refrigerant before

serious damage results.

Keeping the system clean and free of foreign con-

taminants that can restrict the operation of valves, block

capillary tubes or damage compressors is the best way

to assure trouble-free operation. These contaminants

can be solids, such as metal lings, ux, dust and dirt.

Other equally menacing contaminants are solubles,

such as acid, water, resins and wax.

No matter how many precautions are taken during

assembly and installation or servicing of a system,

contaminants can nd a way into the system. Filter-

driers are designed to protect a system during operation.

It is the function of this all important unit to remove those

residual elements that can attack and eventually destroy

the system components.

Filtration Capacity

Solid particles or semi-solids such as sludges

circulating in a refrigerant system can destroy valve

seats, plug control valves, and score cylinder walls or

compressor bearings. These contaminants can be the

result of manufacturing, servicing, or can be generated

during normal system operation.

It is important to remove these contaminants as

quickly as possible and prevent them from returning to

the system. Properly specied lter driers are designed

to trap and hold large quantities of these contaminants

while maintaining low pressure drop during their service

life.

Moisture Capability

Moisture in a refrigeration system can cause frozen

valves, copper plating, damaged motor insulation, corro-

sion, and sludges. Filter driers remove and retain mois-

ture through one or more desiccants. The most popular

and effective desiccant in use today for the removal of

moisture is molecular sieve which can hold three to four

times the water of other commercial absorbents.

Moisture capacity of a lter drier is normally given

in drops of water per ARI Standard 710. These rated

capacities are in addition to any residual moisture that

might be absorbed during manufacturing.

MWP-680

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 71 72

Kommentare zu diesen Handbüchern

Keine Kommentare

Emerson Fluid Chiller Anleitung zur Fehlerbehebung Seite 31

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Nein Emerson Fluid Chiller