C
Craig Curtin
Guest
Hi guys,
I was told over in the Basic Electronics forums to come over here.
We are doing some renovations at home (Sydney Australia) and as part
of this we are going to implement a Hydronically heated floor.
(basically pump hot water through a slab)
This will be in and running for next winter.
What i need built is essentially a fancy differential temperature
controller - as i can not find anything even remotely similar on the
market that will do everything that i want.
I will have a storage tank of hot water which i will need to monitor
the temperature of - during the day this will be heated by a solar
setup on the roof so i will need to be able to have a settable
temperature difference between the two that would control a 24v relay.
e.g. Lets say i set that i want the tank to be at a maximum of 40
degreee C. (Set point 1) So this would need one temperature probe that
could be positiioned in/on the tank
I also want to set that if the roof is 5 degrees (or more) warmer than
the tank (and the tank is not at 40 degrees) then turn on the relay
(which will activate a small circulating pump). In the event that the
differential temperature becomes less than 5 degrees turn off the pump
The system would then need to have a 2nd Set point for monitoring the
room temperature (lets say i set that to 22 degrees) ( I would
actually like a couple of these inputs (say 3) for 3 seperate
thermostats) which the system could monitor and have seperate outputs
(relay) for each one. (So i could have 3 different areas that were
being monitored and potentially running at different temperatures)
Each of these outputs would be tied into a "master" so if any were
active the master was also active - this would drive a relay which
would drive a circulating pump and finally the outputs of each of the
3 zones would then drive a solenoid for each zone that would be on or
off
Lastly a time controller that could contol the different temperatures
for potentially differnet times of the day - so for instance the Home
theatre would run at 18 degress during the day but at 5PM would raise
the temperature to 22, whereas the laundry and bathroom area would run
at 22 degrees during the day and then go down to 15 degress overnight
??
All of this would have some form of LCD interface to enable the
monitoring and setting of each of the elements (or it could interface
back to a PC system
Any ideas how i would go about this - i am not up on Electronics but
do COmputer systems for a living. I am willing to pay for this to be
done if someone feels that they can handle it all.
Craig
I was told over in the Basic Electronics forums to come over here.
We are doing some renovations at home (Sydney Australia) and as part
of this we are going to implement a Hydronically heated floor.
(basically pump hot water through a slab)
This will be in and running for next winter.
What i need built is essentially a fancy differential temperature
controller - as i can not find anything even remotely similar on the
market that will do everything that i want.
I will have a storage tank of hot water which i will need to monitor
the temperature of - during the day this will be heated by a solar
setup on the roof so i will need to be able to have a settable
temperature difference between the two that would control a 24v relay.
e.g. Lets say i set that i want the tank to be at a maximum of 40
degreee C. (Set point 1) So this would need one temperature probe that
could be positiioned in/on the tank
I also want to set that if the roof is 5 degrees (or more) warmer than
the tank (and the tank is not at 40 degrees) then turn on the relay
(which will activate a small circulating pump). In the event that the
differential temperature becomes less than 5 degrees turn off the pump
The system would then need to have a 2nd Set point for monitoring the
room temperature (lets say i set that to 22 degrees) ( I would
actually like a couple of these inputs (say 3) for 3 seperate
thermostats) which the system could monitor and have seperate outputs
(relay) for each one. (So i could have 3 different areas that were
being monitored and potentially running at different temperatures)
Each of these outputs would be tied into a "master" so if any were
active the master was also active - this would drive a relay which
would drive a circulating pump and finally the outputs of each of the
3 zones would then drive a solenoid for each zone that would be on or
off
Lastly a time controller that could contol the different temperatures
for potentially differnet times of the day - so for instance the Home
theatre would run at 18 degress during the day but at 5PM would raise
the temperature to 22, whereas the laundry and bathroom area would run
at 22 degrees during the day and then go down to 15 degress overnight
??
All of this would have some form of LCD interface to enable the
monitoring and setting of each of the elements (or it could interface
back to a PC system
Any ideas how i would go about this - i am not up on Electronics but
do COmputer systems for a living. I am willing to pay for this to be
done if someone feels that they can handle it all.
Craig