From: john.wood@nrl.navy.mil   
      
   On 09/09/2013 03:31 PM, Bob wrote:   
   > Hello,   
   >   
   > Have a forced hot water system for home heating that uses the typical 2   
   > wire Honeywell thermostat to control a Honeywell RA832A switching relay.   
   >   
   > The switching relay closes the circuit to the thermopile, as well as   
   > closing the 110 V circuit for the water circulator.   
   >   
   > There is also a transformer that provides 24 V for the thermostat and   
   > the relay.   
   >   
   > Question:   
   >   
   > Guess I'm dating myself somewhat here, but there is a symbol that I am   
   > not familiar with in the instruction sheet for it.   
   >   
   > The secondary of the transformer (going to the thermostat) shows what is   
   > similar tho the common resistor symbol of   
   > 3 points up, and 3 points down from the baseline.   
   >   
   > But this symbol has only 1 point up, 1 point down, and then the return   
   > to the baseline.   
   >   
   > I don't think it is meant to be a resistor.   
   >   
   > It is drawn close to the relay contact symbols.   
   >   
   > Could it be meant to be the coil for the relay, perhaps ?   
   >   
   > Or,... ?   
   >   
   > Thanks,   
   > Bob   
   >   
   Hello, and just a thought: After reading and understanding (I think)   
   schematics of radios, TVs, and audio components for years, I'm still   
   often confused by the schematic symbols for wiring and electric   
   components as used by the automotive industry.  And then there's those   
   "single-point" diagrams used by electric power utilities to denote   
   3-phase AC power generation and distribution.  Sincerely,   
      
   --   
   J. B. Wood	            e-mail: arl_123234@hotmail.com   
      
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