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Water Treatment — Untreated or improperly treated wa- ter may result in corrosion, scaling, erosion, or algae. The ser- vices of a qualified water treatment specialist should be ob- tained to develop and monitor a treatment program. Inspect the Starting Equipment — Before working on any starter, shut off the chiller, open and tag all disconnects supplying power to the starter. OPTIONAL PUMPOUT COMPRESSOR OIL CHARGE — Use oil conforming to Carrier specifications for reciprocat- ing compressor usage. Oil requirements are as follows: ISOViscosity...................................... 68 CarrierPartNumber ........................PP23BZ103 The total oil charge, 4.5 pints (2.6 L), consists of3.5 pints (2.0 L) for the compressor and one additional pint (0.6 L) for the oil separator. Oil should be visible in one of the compressor sight glasses during both operation and at shutdown. Always check the oil level before operating the compressor. Before adding or chang- ing oil, relieve the refrigerant pressure as follows: 1. Attach a pressure gage to the gage port of either compres- sor service valve (Fig. 36). 2. Close the suction service valve and open the discharge line to the storage tank or the chiller. 3. Operate the compressor until the crankcase pressure drops to 2 psig (13 kPa). 4. Stop the compressor and isolate the system by closing the discharge service valve. 5. Slowly remove the oil return line connection (Fig. 36). Add oil as required. 6. Replace the connection and reopen the compressor ser- vice valves. OPTIONAL PUMPOUT SAFETY CONTROL SETTINGS (Fig. 39) — The optional pumpout system high-pressure switch opens at 161 psig (1110 kPa) and closes at 130 psig (896 kPa). Check the switch setting by operating the pumpout compressor and slowly throttling the pumpout condenser water. Ordering Replacement Chiller Parts — When ordering Carrier specified parts, the following information must accompany an order: Water must be within design flow limits, clean, and treated to ensure proper chiller performance and reduce the poten- tial of tube damage due to corrosion, scaling, erosion, and algae. Carrier assumes no responsibility for chiller damage resulting from untreated or improperly treated water. The disconnect on the starter front panel does not deener- gize all internal circuits. Open all internal and remote dis- connects before servicing the starter. Never open isolating knife switches while equipment is operating. Electrical arcing can cause serious injury. Inspect starter contact surfaces for wear or pitting on me- chanical-type starters. Do not sandpaper or file silverplated contacts. Follow the starter manufacturer’s instructions for contact replacement, lubrication, spare parts ordering, and oth- er maintenance requirements. Periodically vacuum or blow off accumulated debris on the internal parts with a high-velocity, low-pressure blower. Power connections on newly installed starters may relax and loosen after a month of operation. Turn power off and re- tighten. Recheck annually thereafter. Check Pressure Transducers — Once a year, the pressure transducers should be checked against a pressure gage reading. Check all eight transducers: the 2 oil differential pres- sure transducers, the condenser pressure transducer, the cooler pressure transducer, and the waterside pressure transducers (consisting of 4 flow devices: 2 cooler, 2 condenser). Note the evaporator and condenser pressure readings on the HEAT_EX screen on the CVC (EVAPORATOR PRESSURE and CONDENSER PRESSURE). Attach an accurate set of re- frigeration gages to the cooler and condenser Schrader fittings. Compare the two readings. If there is a difference in readings, the transducer can be calibrated as described in the Trouble- shooting Guide section. Oil differential pressure (OIL PUMP DELTA P on the COMPRESS screen) should be zero whenev- er the compressor is off. Optional Pumpout System Maintenance — For pumpout unit compressor maintenance details, refer to the 06D, 07D Installation, Start-Up, and Service Instructions. • • • chiller model number and serial number name, quantity, and part number of the part required delivery address and method of shipment. Loose power connections can cause voltage spikes, over- heating, malfunctioning, or failures. 75 Fig. 39 — Optional Pumpout System ControlsPDF Image | 19XR,XRV Hermetic Centrifugal Liquid Chillers 50/60 Hz With PIC II Controls and HFC-134a
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