What Thermostate for District Steam???

Casinojunkie

What would be the correct thermostat for district steam?
Two pipe system.Ywo story apartment house, 3 apartments.
Best loction for thermostat?

Brad White_9

Thermostat

My first inclination would be to set this up without a direct thermostat but rather with a Heat Timer or other cycle control (so many cycles per hour based on outdoor temperature). An indoor thermostat would provide a reference temperature but not direct control.

Typically this setup would take the form of a PRV to reduce the incoming steam to a more digestible pressure (say 2 PSIG or less), then a modulating control valve would initiate and terminate the cycling (as if it were a boiler).

A condensate return sensor would determine cycle completion.

I would also put TRV vent valves on all of the radiators with few exceptions.

If you use a single thermostat, you will have one happy tenant and two with open windows or blankets potentially.

BRIANJ

Thermostats

Can the Heat Timer used for District Steam be used on a two pipe system in place of a thermostat. I think I would be able to control the boiler firings more efficiently using something like this. Thanks.

Brad White_9

Certainly

Heat Timers and others of that type can be applied in several ways. The output can open a valve or fire a boiler.

I am not a hands-on practitioner, so any more details as to what components of a particular manufacturer and how applied, I would leave to others (full disclosure).