Hoshizaki MODULAR CUBELET SERENITY SERIES FS-1022MLH-C Manual do Utilizador descarregar pdf (Página 43)

4) Close the low-side valve and high-side valve on the gauge manifold.

5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a

refrigerant service cylinder. Remember to loosen the connection and purge the air from

the hose. See the rating label inside the icemaker for the required refrigerant charge.

Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI

Standard 700 (latest edition) be used.

6) A liquid charge is required for charging an R-404A system (to prevent fractionation).

Place the service cylinder on the scales: if the service cylinder is not equipped with

a dip tube, invert the service cylinder, then place it on the scales. Open the high-side

valve on the gauge manifold.

7) Allow the system to charge with liquid until the proper charge weight is met.

8) If necessary, add any remaining charge to the system through the low-side.

CAUTION! To prevent compressor damage, use a throttling valve or liquid

dispensing device to add the remaining liquid charge through the low-side

service valve with the unit running.

9) Close the high and low-side service valves. Close the high and low-side gauge manifold

valves, then disconnect the gauge manifold hoses.

10) Cap the service valves to prevent a possible leak.

B. Important Notes for Component Replacement

CAUTION

When replacing a component listed below, see the notes to help ensure proper

operation.

Component Notes

Compressor •Installanewdrier,startcapacitor,runcapacitor,andstartrelay.

Expansion Valve •Installanewdrier.

•Attachtheexpansionvalvebulbtothesuctionlineinthesamelocationastheprevious

bulb.

•Thebulbshouldbebetweenthe10and2o'clockpositionsonthetube.

•Securethebulbwiththeclampandholder,theninsulateit.

Pump-Down

Solenoid Valve

•Installanewstraineranddrier.

•Usecoppertubeofthesamediameterandlengthwhenreplacingvalvelines.

Fan Motor •Installanewfanmotorcapacitor.

Evaporator Assembly Components. See Fig. 7.

Upper and

Lower Bearings

•Inspecttheupperbearingforwear.See"V.B.1.UpperBearingWearCheck."Replaceif

necessary.

•Whenreplacingtheupperbearingitisadvisedtoalsochangethelowerbearingatthe

same time.

Evaporator •Installanewdrier.

•InspectthemechanicalsealandO-ringpriortoinstallingthenewevaporator.Ifworn,

cracked, or scratched, the mechanical seal should also be replaced.

Gear Motor •Installanewgearmotorcapacitor.

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