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I am far from an HVAC expert, but I think these lines from the article help clarify the issue: > The temperature dial doesn’t work, the building controls wheth

by mhink 6y ago

I am far from an HVAC expert, but I think these lines from the article help clarify the issue: > The temperature dial doesn’t work, the building controls whether its heating or cooling time. > The fluid temperature is out of our control since the building adjusts it based on the outside temperature. It doesn't sound like the device they have available is actually a proper thermostat- rather, it's just a control device for a water heater + radiator + fan. The switch adjusts how fast air is blowing over the radiator, and the dial is supposed to adjust the temperature of the fluid in the radiator. But if I understand correctly, the building sets their radiator fluid temperature for the whole building, and it sounds like the fan speed is apparently useless, so the only control the author has over their unit's temperature is whether or not the fan is on or off. So, what they built is the actual thermostat, which mechanically actuates the on/off switch based on a temperature measurement.

wolfgang42 6y ago
What I would expect under the circumstances you describe is that the knob controls the temperature at which the fan turns on and off. It sounds like the building installed the wrong device for the job, or didn’t hook it up properly, or it’s otherwise broken; hard to tell from the article which of those options it is.
- ysabri 6y ago
  Not hooked cause the valve it's supposed to turn to control the fluid in the pipes is stuck.
maxerickson 6y ago
Right, what I'm saying is that no heating system would work like that, the fluid temperature is set at the furnace (the controller might vary it based on the outdoor temperature or other factors, but it's not a directly adjustable user input). The likely function of the dial is to set a temperature where the fan turns on and off.
- maxerickson 6y ago
  Here's the product: http://www.pecomanufacturing.com/controls/hvac-thermostats/T155/ http://www.pecomanufacturing.com/controls/hvac-thermostats/T... The dial is a thermostat that reads room temperature and turns the heat source on and off accordingly.

by mhink 6y ago

wolfgang42 6y ago

What I would expect under the circumstances you describe is that the knob controls the temperature at which the fan turns on and off. It sounds like the building installed the wrong device for the job, or didn’t hook it up properly, or it’s otherwise broken; hard to tell from the article which of those options it is.

ysabri 6y ago
Not hooked cause the valve it's supposed to turn to control the fluid in the pipes is stuck.

maxerickson 6y ago

Right, what I'm saying is that no heating system would work like that, the fluid temperature is set at the furnace (the controller might vary it based on the outdoor temperature or other factors, but it's not a directly adjustable user input). The likely function of the dial is to set a temperature where the fan turns on and off.

maxerickson 6y ago
Here's the product: http://www.pecomanufacturing.com/controls/hvac-thermostats/T155/ http://www.pecomanufacturing.com/controls/hvac-thermostats/T... The dial is a thermostat that reads room temperature and turns the heat source on and off accordingly.