Forums before death by AOL, social media and spammers... "We can't have nice things"
|    alt.engineering.electrical    |    Electrical engineering discussion forum    |    2,547 messages    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
|    Message 936 of 2,547    |
|    Tom Biasi to Bob    |
|    Re: Schematic Symbol I Am Not Familiar W    |
|    09 Sep 13 16:02:36    |
      From: tombiasi@optonline.net              On 9/9/2013 3:31 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       >       Without seeing it Bob it's difficult to say. Often relay coils are drawn       using just a rectangle with a lead at each end. Can you see where the       leads go? Is there a diode across the leads?              Tom              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
(c) 1994, bbs@darkrealms.ca