B
BenFranske
- Jan 1, 1970
- 0
Context: I'm trying to design a little monitoring circuit that will
tell me when my air conditioning is interrupted by my utility's "Saver
Switch" which reduces load during peak times.
Specifics: Central air conditioners normally receive a signal to turn
on their compressor by having 24 VAC applied to two terminals on their
control board by the thermostat (a switch). In my case my utility has
wired another (remote controllable) switch in series with the
thermostat which can be turned off during periods of high demand
preventing the compressor from being run. I would like to monitor the
state of both the thermostat switch and the utility saver switch
independently. I would also like to monitor whether 24 VAC is being
applied to the compressor control board.
Goal: A circuit which will provide three 5vdc logic outputs one which
shows whether the thermostat switch is open or closed, one which shows
whether the utility saver switch is open or closed and one which shows
whether 24 VAC is being applied to the compressor terminals. If any
one of the three logic points is low the compressor would not be
running, if all three are high the compressor should be running.
Does anyone have some suggestions about how to do this? It seems to me
the tricky part is measuring whether the switches are open or closed
as they may or may not have 24 VAC flowing through them.
Thanks!
tell me when my air conditioning is interrupted by my utility's "Saver
Switch" which reduces load during peak times.
Specifics: Central air conditioners normally receive a signal to turn
on their compressor by having 24 VAC applied to two terminals on their
control board by the thermostat (a switch). In my case my utility has
wired another (remote controllable) switch in series with the
thermostat which can be turned off during periods of high demand
preventing the compressor from being run. I would like to monitor the
state of both the thermostat switch and the utility saver switch
independently. I would also like to monitor whether 24 VAC is being
applied to the compressor control board.
Goal: A circuit which will provide three 5vdc logic outputs one which
shows whether the thermostat switch is open or closed, one which shows
whether the utility saver switch is open or closed and one which shows
whether 24 VAC is being applied to the compressor terminals. If any
one of the three logic points is low the compressor would not be
running, if all three are high the compressor should be running.
Does anyone have some suggestions about how to do this? It seems to me
the tricky part is measuring whether the switches are open or closed
as they may or may not have 24 VAC flowing through them.
Thanks!