Reverse acting thermostat for electrical room
Reverse acting thermostat for electrical room
(OP)
Hi, I have an electrical room to be installed a reverse acting thermostat, with setting point 100F. But I cannot find a reverse acting thermostat with 100F setting. H..Well product has only 86F. My design temperature outside is 87F in summer, so I want the setting to be 100F. Can anyone recommend a reverse acting thermostat for the electrical room (transformers load about 36000 BTU/h)?





RE: Reverse acting thermostat for electrical room
RE: Reverse acting thermostat for electrical room
http://www.chromalox.com/en/catalog/component-tech...
https://www.heatersplus.com/tstat.html
http://www.midwestbas.com/store/siemens_356-0013.h...
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RE: Reverse acting thermostat for electrical room
A reverse acting thermostat (heat controller) would attempt to maintain a setpoint of 86 Deg F by calling for heat until the sensor is satisfied at about 87 Deg F (deadband above and below the setpoint for on-off controllers).
Are you sure you want to maintain a temperature of 86 Deg F in an electrical room where devices are generating heat with a thermostat that calls for heat? You don't need a cooling thermostat?
If you'll notice, the list of applications for Little Inch's link, the Chromalox reverse acting controller/thermostat, includes water baths, heat sealers, and ovens; all heating devices, not cooling devices.
RE: Reverse acting thermostat for electrical room
RE: Reverse acting thermostat for electrical room
What the thermostat controls is not relevant, it's just an open / close contact which in this case closes on rising temperature. What it controls is irrelevant to the thermostat - a switch is a switch. If the current capacity isn't big enough fit a relay or plug it into a breaker.
I'm struggling to understand your problem.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Reverse acting thermostat for electrical room
RE: Reverse acting thermostat for electrical room
A cooling thermostat calls for cooling action (closes relay contacts) when the sensed temperature rises past the setpoint (too hot: call for cooling)
Close on rise is 'direct' action (industrial ISA world)
Close on drop is 'reverse'action
This is a cooling app which needs a cooling thermostat.
RE: Reverse acting thermostat for electrical room
the chromalux site link in Little Inches post has both direct and revers acting thermostatic switches in the temperature range that you want ( 60-200 degrees F) here is the reverse acting part number ARR-219, the direct acting part number for the same switch is AR-219. These are what you need to turn a fan on when the temp rises. They are direct acting in that you do not need a switching relay you can wire them direct to the fan.
B.E.
You are judged not by what you know, but by what you can do.