Carrier 30WG 080 - Page 3

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6 - ELECTRICAL CONNECTION ............................................................................................................................................29
6.1 - Electrical connections, control box 61WG/30WG/ 30WGA ............................................................................................. 29
6.2 - Power supply ........................................................................................................................................................................... 29
6.3 - Voltage phase imbalance (%) ............................................................................................................................................... 29
6.4 - Recommended wire sections .................................................................................................................................................29
6.5 - 24 V user power reserve ........................................................................................................................................................ 31
7 - 30WGA UNIT CONNECTIONS .......................................................................................................................................... 31
7.1 - Recommendations for the installation of liquid chillers with remote condenser ............................................................31
7.2 - Piping installation and connection ........................................................................................................................................ 31
8 - PIPE SIZING WITH REFRIGERANT FOR 30WGA UNITS ....................................................................................... 32
8.1 - General considerations and pipe size limits ........................................................................................................................ 32
8.2 - Pipe sizing ................................................................................................................................................................................ 32
8.3 - Discharge pipe sizing .............................................................................................................................................................32
8.4 - Liquid line sizing .................................................................................................................................................................... 33
9 - WATER CONNECTIONS ...................................................................................................................................................... 33
9.1 - Operating precautions ........................................................................................................................................................... 33
9.2 - Water connections .................................................................................................................................................................. 34
9.3 - Frost protection ...................................................................................................................................................................... 35
9.4 - Flow switch (units without hydronic module) ....................................................................................................................35
10 - NOMINAL WATER FLOW CONTROL WITH FIXED-SPEED PUMP ................................................................... 35
10.1 - General .................................................................................................................................................................................. 35
10.2 - Water fow control procedure .............................................................................................................................................35
11 - NOMINAL WATER FLOW CONTROL WITH VARIABLE-SPEED PUMP .......................................................... 36
11.1 - Pump fow/pressure curve ..................................................................................................................................................... 36
11.2 - Available external static pressure (variable-speed high-pressure pumps, units with hydronic module .....................37
11.3 - Available external static pressure (xed-speed low-pressure pumps, units with hydronic module) ...................................... 38
11.4 - Pump curve (units with hydronic modules) .......................................................................................................................39
12 - OPERATION OF 61WG UNITS WITH SPECIFIC HEATING CONTROL (OPTION 153) .................................39
12.1 - Operating principle ..............................................................................................................................................................39
12.2 - Auxiliary electronic board (AUX1) - analogue and digital inputs and outputs ........................................................... 39
13 - OPERATION OF 61WG UNITS WITH THE HEATING SYSTEM MANAGER (HSM) ..........................................40
14 - 30WG UNIT OPERATION WITH A DRYCOOLER (OPTION 154) ......................................................................... 41
14.1 - Operating principle ..............................................................................................................................................................41
14.2 - Auxiliary electronic board (AUX1) - analogue and digital inputs and outputs - to control the drycooler ....................41
14.3 - Conguration of the number of fan stages and the automatic changeover of the fan stages .....................................41
14.4 - Fan stage assignment ............................................................................................................................................................ 41
14.5 -
30WG units without evaporator and condenser pump, three-way valve conguration for low outside temperature
application ............................................................................................................................................................................. 42
14.6 - Drycooler installation on 30WG units ............................................................................................................................... 42
15 - 30WGA UNIT OPERATION WITH A REMOTE AIR-COOLED CONDENSER (OPTION 154) ...................... 42
15.1 - Operating principle ..............................................................................................................................................................42
15.2 - Lead fan ................................................................................................................................................................................. 42
15.3 - Auxiliary electronic board (AUX1) - analogue and digital inputs and outputs - to control the remote air-cooled
condenser ............................................................................................................................................................................... 42
15.4 -
Conguration of the number of fan stages and fan type based on the air-cooled condenser model used in the
installation..............................................................................................................................................................................42
16 - START-UP ...............................................................................................................................................................................43
16.1 - Preliminary checks ...............................................................................................................................................................43
16.2 - Actual start-up ......................................................................................................................................................................43
16.3 - Refrigerant charge adjustment ...........................................................................................................................................43
16.4 - Oil charge adjustment .......................................................................................................................................................... 44
16.5 - Operation of two units in master/slave mode (option 58) ...............................................................................................44
16.6 - Parallel or serial connection of two 61WG/30WG/ 30WGA units ................................................................................. 44