Carrier 19CB User Manual

CarrierAirconditioningCompanyGVHermetic Centrifugal Liquid ChillersCONTENTSINTRODUCTIONGeneralJob Data Required Equipment RequiredINITIAL PREPARATIONM

• ^^>4-iXwCr.- ••VJ 'ava>; «O*«®a.b.9. IfFig. 7 — Capacity Control Module (Electronic Control)Check the foregoing motor current calib

ELECTRO-PNEUMATIC RELAYLOCKNUTS SENSITIVITY SCREW^SET POINT SCREWCOVERCONTROL AIR (OUTPUT)This control is factory calibrated to provide a line

FINAL MACHINE ADJUSTMENTTrimming Refrigerant Charge — After the macliine has been placed in operation, it may be necessary to adjust t

ì23456 7 S 3ÎOn— Cooler— Cooler Ret:igerant Level Sight Glass— Low Refrigerant Temoerature Sulb— Thermometer Well— Machir.e Control Ceitter(See Rig.:

1 Serial Numlser idenritica- Tior> Piste2 Oil C^iarairvg Valve3 Gii Heater Tl>erfr;ost3t4 Oil Heater ; ern-.inal Sox5 Oil Reservoir Siijf.t Gla

SEPARABLE UNIONPIPING BY CARRIER FIELD PIPING1. Connect dehydration pump to cooler charging valve.2. Ensure that all valves on purge ass

r.Refrigerant Charge1. Install a charging valve in the 3/4-in. drum opening as shown in Fig. 5.3.4.Fig. 5 — Drum Charging ValveConnect a shor

Check Starter — Before starting the 19CB machine,open the main disconnect and check starter.1. Remove contactor arc chutes. Be sure contactors

With OIL PUMP button depressed, alternately stop and restart chilled water and condenser water pumps. SAFETY CIRCUIT and LOAD RECYCLE li

knob on demand limit control at 100% and turn calibration screw fully clockwise.Place a clamp-on ammeter on one of the 3 starter lead

SAFETY OR CONTROL DEVICETable 4 — Setting Safety Controls (contd)SAFETY OR CONTROL DEVICE5. Low Oil Pressure Cutout (Fig, 2)RESERVOIR PRESSURE-:^,RAN