Carrier 30XW Installation, Operation And Maintenance Instructions

Also see for 30XW: Operation instructions User guide Installation, operation and maintenance instructions

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Carrier 30XW Installation, Operation And Maintenance Instructions Manual pdf 32 page image

3213.5 - Tightening torques for the main bolts and screwsScrew type Used for Torquevalue, N·mM20 nut Chassis 190M20 nut Heat exchanger side-side connection 240M16 nut Compressor fixing 190H M16 screw Heat exchanger water boxes, structure 190H M16 screw Compressor suction flanges TT 190H M20 screw Compressor suction flanges TU & TV 240M16 nut Compressor discharge line TT & TU 190M20 nut Compressor discharge line TV 240H M12 screw Economiser port flange & economiser portvalve, option 9280H M8 screw Drier cover 351/8 NPT connection Oil line 12TE nut Compressor oil line 24,57/8 ORFS nut Oil line 1305/8 ORFS nut Oil line 653/8 ORFS nut Oil line 26H M6 screw Stauff collar 10Taptite screw M6 Oil line collar 7Taptite screw M6 Brass body, economiser line 10Metric screw M6 Steel plate fixing, control box, terminal box 7Taptite screw M10 Oil filter, economiser module, control box fixing 3013.6 - Evaporator and condenser maintenanceCheck that:• the insulating foam is intact and securely in place,• the sensors and flow switch are correctly operatingand correctly positioned in their support,• the water-side connections are clean and show no signof leakage.13.7 - Compressor maintenance13.7.1 - Oil filter change scheduleAs system cleanliness is critical to reliable system operation,there is a filter in the oil line at the oil separator outlet. Theoil filter is specified to provide a high level of filtration (5 μm)required for long compressor life.The filter should be checked after the first 500 hours ofoperation, and every subsequent 2000 hours. The filter shouldbe replaced at any time when the pressure differentialacross the filter exceeds 2 bar.The pressure drop across the filter can be determined bymeasuring the pressure at the discharge port (at the oilseparator) and the oil pressure port (at the compressor).The difference in these two pressures will be the pressuredrop across the filter, check valve, and solenoid valve. Thepressure drop across the check valve and solenoid valve isapproximately 0.4 bar, which should be subtracted from thetwo oil pressure measurements to give the oil filter pressuredrop.13.4.3 - Connection precautions for the power contactorsThese precautions must be applied for units equipped with06TUA554, 06TVW753 and 06TVW819 compressors. Forthese units the power contactor type is 3RT1064 (Siemens).The contactors allow two connection positions in the cageclamps. But only one position allows safe and reliabletightening on the contactor (KM1 or KM2). The conductormust be positioned in front of the connection area when itis tightened. If it is tightened behind the area, there is a riskthat the brackets will be damaged during the tightening.Conductor position NOT ALLOWEDCOMPULSORY conductor position13.4.2 - Connection precautions for the compressor powerterminalsThese precautions must be applied during an interventionthat requires the removal of the power conductors connectedto the compressor supply terminals.The tightening nut of terminal (6) supporting the isolator(7) must never be loosened, as ist ensures terminal tightnessand compressor leak tightness.The tightening of phase lug (4) must apply the torquebetween counter nut (5) and tightening nut (3): during thisoperation a counter-torque must be applied at counter nut(5). Counter-nut (5) must not be in contact with the tighteningnut of terminal (6).1. Torque application to tighten the lug2. Avoid contact between the two nuts3. Lug tightening nut4. Flat lug5. Counter-nut6. Terminal tightening nut7. Isolator