EVAPORATOR COMPARTMENT (Interior top area)
— All serviceable parts are directly accessible from the top of the cartridge compartment.
COMPRESSOR COMPARTMENT (Bottom rear area) — Access to compressor compartment requires removal of the side panel of the cartridge. Condenser fan access also requires removal of a side panel. Side panels are secured with 5 Phillips screws. After tubing and electrical connections are removed, compressor replacement requires removal of four clips securing compressor to the base.
Before servicing unit, disconnect electrical service. On sizes 1100L and 1300L, turn disconnect switch (located on power cord) to the OFF position. Failure to disconnect electrical service could result in elec- trical shock and cause personal injury or death.
EVACUATION — Moisture in a refrigeration system may affect performance.
When large amounts of moisture are present, system freeze ups will occur. Even in minute amounts, mois- ture will combine with refrigerants to form an acid.
The corrosive action of this acid forms sludge, which will plug the lines and drier.
Since most field type vacuum pumps cannot pull a low enough vacuum to remove all moisture from the sys- tem, it is recommended that the system be triple evac- uated, breaking each time with dry refrigerant nitrogen. Use care to purge air from the charging hose when breaking the vacuum.
CHARGING REFRIGERATION SYSTEM — Refer to Table 2 for refrigerant type and amount of charge. Since capillary tube systems have small critical refrig- erant charges, it is recommended that a field charge either be weighed in or transferred from a portable charging cylinder. After maximum vacuum has been obtained as detailed above, attach charging cylinder to the system line making sure to purge air from hose with refrigerant. With the unit running, allow refrig- erant to run slowly into the system until the desired charge is reached. When using refrigerant blends it is recommended to charge into the high side of the sys- tem with the initial charge and then add any remain- ing charge into the suction side; however, care must be taken to meter the remaining amount into the low side so that excess liquid does not enter the compressor.
TROUBLESHOOTING — Refer to Table 3 and Figures
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