Carrier 48HC*04–14 Service And Maintenance Instructions

17No ChargeUse standard evacuating techniques. After evacuatingsystem, weigh in the specified amount of refrigerant.Low--Charge CoolingUsing Cooling Charging Charts, Fig. 22 through Fig. 29,vary refrigerant until the conditions of the appropriatechart are met. Note the charging charts are different fromtype normally used. Charts are based on charging the unitsto the correct sub--cooling for the various operatingconditions. Accurate pressure gauge and temperaturesensing device are required. Connect the pressure gauge tothe service port on the liquid line. Mount the temperaturesensing device on the liquid line and insulate it so thatoutdoor ambient temperature does not affect the reading.Indoor--air cfm must be within the normal operating rangeof the unit.SIZE DESIGNATION NOMINAL TONSREFERENCE04 305 406 507 608 7.509 8.512 1014 12.5EXAMPLE:Model 48HC*A04Outdoor Temperature 85_F (29_C). . . . . . . . . . . . . . . . . .Suction Pressure 140 psig (965 kPa). . . . . . . . . . . . . . . . .Suction Temperature should be 60_F (16_C). . . . . . . . . .Using Cooling Charging ChartsTake the outdoor ambient temperature and read the liquidpressure gauge. Refer to chart to determine what liquidtemperature should be. If liquid temperature is low, addrefrigerant. If liquid temperature is high, carefully recoversome of the charge. Recheck the liquid pressure as chargeis adjusted.1/2-20UNF RH300.596.475/8” HEXSEAT COREWASHER DEPRESSOR PER ARI 720+.01/-.035FROM FACE OF BODY7/16-20 UNF RHO-RING45oo(Part No. EC39EZ067)This surface provides a metal to metal seal whentorqued into the seat. Appropriate handing isrequired to not scratch or dent the surface.1/2” HEXC08453Fig. 21 -- CoreMax Access Port Assembly48HC