Carrier 17DA Start-up, Operation And Maintenance Instructions Manual

Also see for 17DA: Start-up instructions Application data Operating and maintenance instructions Start-up instructions

1014. See Table 4 for normal operating ranges. Check thesecharacteristics hourly, recording readings in refrigerationlog. Refrigeration log should include all temperatures andpressures mentioned above plus other machine history.This important data helps service engineers determinekind and frequency of service required. See your CarrierService Representative for refrigeration log forms (seeFig. 2).Table 4 — Normal Operating Ranges* Compare refrigerant level with optimum level when machine is shutdown.OPERATIONManual Operation — Control machine manually at thePLC by setting guide vanes on MANUAL and adjusting guidevane position. Operator must watch chilled water temperatureconstantly when running machine in this manner.Cold Weather Operation — Leaving condenser watershould be maintained at 65 F (18 C) minimum. Throttle con-denser water flow or cycle cooling tower fans to suit.Stop Machine1. Check drive manufacturer's recommendations for adjust-ments required before shutdown.2. Push STOP button. Drive will immediately slow downwith a change in sound level. The compressor shouldcome to rest within a minute or two. Check drive andgear, when used, to be sure lubrication is maintained.3. After compressor shaft has stopped rotating, shut off con-densing water, chilled water and oil pumps.4. Shut off cooling water to compressor oil, gear oil. and tur-bine oil coolers.5. Shut off main steam (or gas) valve.6. Open shutdown seal bleed valve (Fig. 3) after machinecompletely stops rotating.7. Leave controls energized for except for seasonal shut-downs.8. Leave oil separation tank heaters energized.9. Isolate oil separation tank from the oil sump.Extended Shutdown1. Pump refrigerant into storage tank and valve it off to pre-vent loss.213 4 5 6789Fig. 3 — Compressor DetailsLEGEND1 — Shaft End Labyrinth, Seal End2 — Journal Bearing, Seal End3 — Journal Bearing Labyrinth,Seal End, Thrust End4 — Seal Movement Switch5 — Journal Bearing, Thrust End6 — Shutdown Seal Bleed Line(valve on opposite side)7 — Shaft End Labyrinth, Thrust End8 — Seal ring9 — Balancing Piston Labyrintha17-572ITEM DESCRIPTION RANGE1 Chilled Water Temperature 36-45 F(2-7 C)2 Condenser Entering Water 65-85 F(18-29 C)3 Compressor Supply Oil 110-120 F(43-49 C)4 Compressor Seal End Bearing 140-180 F(60-82 C)5 Compressor Drive End JournalBearing140-180 F(60-82 C)6 Compressor Drive End DriveBearing140-180 F(60-82 C)7 Condenser Temperature 105 F (41 C) Avg8 Cooler Suction Temperature 28 F (-2 C) min9 Seal Oil Supply Pressure 35 psi (241 kPa)greater than item1010 Back of Seal Pressure Approx. 2 lb (0.9kg) higher thansuction pressure11 Thrust Bearing Oil Supply Pres-sure 18-22 psig(124-152 kPa)12 Cooler Refrigerant Level Varies with load*13SpeedsMaximum Continuous SpeedNominal SpeedCompressor(17DA7,17DA8)6350, 5300 rpm(106, 88 r/s)5350, 4510 rpm(89, 75 r/s)CAUTIONOpen seal shutdown valve only after machine comes to afull stop. If this valve is opened before the machine is fullystopped, the Teflon shutdown seal surface will be dam-aged. A damaged seal will allow the full refrigerant chargeto be lost unless detected by the operator. If a hissing soundis heard coming from the chamber or the odor of refriger-ant is detected, immediately start the oil pump and informthe servicing contractor. Leave the oil pump running untilthe leak can be fixed.