3
9 - WATER CONNECTIONS .......................................................................................................................................................31
9.1 - Operating precautions ..............................................................................................................................................................31
9.2 - Water connections....................................................................................................................................................................31
9.3 - Flow control .............................................................................................................................................................................31
9.4 - Evaporator (and condenser for the 30HXC) water box bolt tightening ..................................................................................32
9.5 - Frost protection ........................................................................................................................................................................32
9.6 - Operation of two units in master/slave mode ..........................................................................................................................33
10 - MAJOR SYSTEM COMPONENTS AND OPERATION DATA ......................................................................................34
10.1 - Geared twin screw compressor ..............................................................................................................................................34
10.2 - Evaporator ..............................................................................................................................................................................34
10.3 - Condenser and oil separator (30HXC) ..................................................................................................................................34
10.4 - Oil separator (30GX) .............................................................................................................................................................34
10.5 - Electronic expansion device (EXD) ......................................................................................................................................34
10.6 - Economizer ............................................................................................................................................................................34
10.7 - Oil pumps ...............................................................................................................................................................................35
10.8 - Motor cooling valves .............................................................................................................................................................35
10.9 - Sensors ...................................................................................................................................................................................35
10.10 - 30GX fan arrangement.........................................................................................................................................................35
11 - MAIN OPTIONS AND ACCESSORIES ..............................................................................................................................36
11.1 - Compressor suction valves (option 92) .................................................................................................................................36
11.2 - Compressor and evaporator noise insulation (30GX - option 14A)......................................................................................36
11.3 - Low-noise 30GX units equipped with acoustic panels (option 15) ......................................................................................36
11.4 - Evaporator frost protection (30GX - option 41A) .................................................................................................................36
11.5 - Year-round operation of 30GX units (option 28) ..................................................................................................................36
11.6 - Soft Start for 3- and 4-compressor 30HXC and 30GX units (option 25) ..............................................................................36
11.7 - Electric protection level of the 30HXC control boxes to IP44C (option 20).......................................................................37
11.8 - Tropicalised control box for 30HXC and 30GX units (option 22) .......................................................................................37
11.9 - Brine units for low-temperature evaporator leaving applications (option 5) .......................................................................37
11.10 - Disassembled 30HXC units (option 52) ..............................................................................................................................37
11.11 - Available fan pressure of 150 Pa for 30GX units (option 12) .............................................................................................37
12 - MAINTENANCE ....................................................................................................................................................................38
12.1 - Refrigerant charging - adding charge ....................................................................................................................................38
12.2 - Indication of low charge on a 30HXC system .......................................................................................................................38
12.3 - Pressure transducers ...............................................................................................................................................................39
12.4 - Oil charging - low oil recharging ..........................................................................................................................................39
12.5 - Integral oil filter change ........................................................................................................................................................39
12.6 - Filter change-out schedule .....................................................................................................................................................39
12.7 - Filter change-out procedure ...................................................................................................................................................39
12.8 - Compressor replacement........................................................................................................................................................40
13 - START-UP CKECKLIST FOR 30HXC/GX LIQUID CHILLERS (USE FOR JOB FILE) ...........................................41
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