Carrier AquaSnap 61WG Series - Page 3

6 - ELECTRICAL CONNECTION .....................................................................................................................................................42
6.1 - Electrical connections, control box .......................................................................................................................................... 42
6.2 - Power supply ...........................................................................................................................................................................42
6.3 - Voltage phase imbalance (%)..................................................................................................................................................42
6.4 - Recommended wire sections ..................................................................................................................................................42
6.5 - 24 V user power reserve .........................................................................................................................................................43
7 - 30WGA UNIT CONNECTIONS ....................................................................................................................................................44
7.1 - Recommendations for the installation of liquid chillers with remote condenser ...................................................................... 44
7.2 - Piping installation and connection ........................................................................................................................................... 44
8 - PIPE SIZING WITH REFRIGERANT FOR 30WGA UNITS ......................................................................................................... 45
8.1 - General considerations and pipe size limits ............................................................................................................................ 45
8.2 - Pipe sizing ............................................................................................................................................................................... 45
8.3 - Discharge pipe sizing ..............................................................................................................................................................45
9 - WATER CONNECTIONS ............................................................................................................................................................. 47
9.1 - Operating precautions ............................................................................................................................................................. 47
9.2 - Water connections ...................................................................................................................................................................47
9.3 - Frost protection .......................................................................................................................................................................48
9.4 - Flow switch (units without hydraulic module) ..........................................................................................................................48
10 - NOMINAL WATER FLOW CONTROL WITH FIXED-SPEED PUMP ........................................................................................49
10.1 - General..................................................................................................................................................................................49
10.2 - Water ow control procedure ...............................................................................................................................................49
11 - NOMINAL WATER FLOW CONTROL WITH VARIABLE-SPEED PUMP .................................................................................51
11.1 - Pump ow/pressure curve ..................................................................................................................................................... 51
11.2 - Available external static pressure (variable-speed High / Fixed speed-pressure Double pumps, units with hydraulic module ... 51
11.3 - Available external static pressure (Variable speed / xed-speed high-pressure single pumps, units with hydraulic module) 52
11.4 - Available external static pressure (Variable-speed / Fixed speed Low pressure single pumps, units with hydraulic module. 53
12 - OPERATION OF 30WG UNITS WITH SPECIFIC HEATING CONTROL (OPTION 153) .......................................................... 54
12.1 - Operating principle ................................................................................................................................................................54
12.2 - Auxiliary electronic board (AUX1) - analogue and digital inputs and outputs .......................................................................54
13 - OPERATION OF 30WG UNITS WITH THE HEATING SYSTEM MANAGER (HSM) ...............................................................55
14 - 30WG/61WG UNIT OPERATION WITH A DRYCOOLER (OPTION 154) ................................................................................. 56
14.1 - Operating principle ................................................................................................................................................................56
14.2 - Communication to control the drycooler ................................................................................................................................56
14.3 - Conguration of the number of fan stages and the automatic changeover of the fan stages ............................................... 56
14.4 - Fan stage assignment ........................................................................................................................................................... 56
14.5 - Units without evaporator and condenser pump, three-way valve conguration for low outside temperature application ..... 56
14.6 - Drycooler installation on units ...............................................................................................................................................56
15 - 30WGA UNIT OPERATION WITH A REMOTE AIR-COOLED CONDENSER (OPTION 154) .................................................57
15.1 - Operating principle ................................................................................................................................................................57
15.2 - Lead fan ................................................................................................................................................................................57
15.3 - Communication to control the remote condenser..................................................................................................................57
15.4 - Conguration of the number of fan stages and fan type based on the air-cooled condenser model used in the installation 57
16 - UNIT OPERATION WITH A FREE COOLING DRYCOOLER ...................................................................................................58
16.1 - Operating principle ................................................................................................................................................................58
16.2 - Communication to control the drycooler ................................................................................................................................58
16.3 - Conguration of the fans control ...........................................................................................................................................58
16.4 - Water valves ..........................................................................................................................................................................58
16.5 - System installations recommandation ...................................................................................................................................58
17 - START-UP ..................................................................................................................................................................................59
17.1 - Preliminary checks ................................................................................................................................................................59
17.2 - Actual start-up .......................................................................................................................................................................59
17.3 - Operation of two units in master/slave mode (option 58) ...................................................................................................... 59
17.4 - Parallel or serial connection of two units ............................................................................................................................... 59
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