Refrigeration Components Wiring Diagram Symbols. It is called ladder because the symbols that are used to represent the components in the system have been placed on the rungs of a ladder. 1 master element 2 time delay starting or closing relay 3 checking or interlocking relay 4 master contactor 5 stopping device 6 starting circuit breaker 7 rate of change relay 8 control power disconnecting device 9 reversing device 10 unit.
Symbols and abbreviations used in the schematic mean. A wiring diagram usually gives suggestion virtually the relative slant and arrangement of devices. For example 14 gauge wire will become 12 gauge 10 gauge will be 8 gauge etc.
Electrical circuit of a refrigerator is shown in fig.
It all rides on circuit that is being assembled. It shows the components of the circuit as simplified shapes and the knack and signal contacts surrounded by the devices. Start studying chapter 5. The efm evaporator fan motor must run all the time so that the box temperature stays uniform and the thermostat senses the average box temperature not some pocket of stratified air.