Line Voltage Thermostat Question (cooling only)
#1
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Line Voltage Thermostat Question (cooling only)
We have a Carrier 15 ton rooftop unit with the air handler on the first floor (3 story building) All pneumatic controls which someone made a mess out of before I started here. Ok, I'm able to get the AC to come on manually and shut it off with the breaker. This has been working fine for a few weeks and now they are asking for some kind of temp control. Is it possible to put a line voltage thermostat on the primary side of the transformer (280V)? If not, is it possible to break a connection anywhere that would give some kind of control?
Thanks,
Joe
ps~reason for this is company trying to same money. ha!
Thanks,
Joe
ps~reason for this is company trying to same money. ha!
#2
Your going to try "rig up" a control for a 15 ton AC unit that runs three floors.
You should have control wiring between the air handler and the rooftop unit.
You should try to incorporate a thermostat within that wiring.
Constantly disconnecting the AC is not going to be a good thing for the unit.
Maybe with the model number of the compressor we could help you out further.
You should have control wiring between the air handler and the rooftop unit.
You should try to incorporate a thermostat within that wiring.
Constantly disconnecting the AC is not going to be a good thing for the unit.
Maybe with the model number of the compressor we could help you out further.
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I'll get the number of the compressor for you. No, this unit doesn't run all 3 floors, it just takes care of the front part of the first floor. If I run it for about a hour they are good for the whole morning, and just now I turned it on again and I'll shut it off for the day in about an hour.
#5
http://www.xpedio.carrier.com/idc/gr..._40b,r-1xa.pdf
page 18 and 19... you should be able to use a 24V thermostat. They make plenty of wireless thermostats now. You need to know how the system is controlled (voltage wise - not pneumatic wise) in order to determine how to make it work with a conventional thermostat.
page 18 and 19... you should be able to use a 24V thermostat. They make plenty of wireless thermostats now. You need to know how the system is controlled (voltage wise - not pneumatic wise) in order to determine how to make it work with a conventional thermostat.