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Why doesn’t Mr Unit Heater work?
Chuck_17
Member Posts: 125
And why does he make noise?
This unit heater was installed in a room in a building which has convectors in most rooms. (It was a convent and most of the rooms are small bedrooms). It is Is in a corner sun room that is currently used as an office. The person working there says when it goes on it is hot then cold. And it bangs a bit.
The steam system is controlled by a tekmar 279 with a few space sensors. I assume the unit heater is blowing cold waiting for the boiler to start up it’s cycle.
Water hammer – There is no drip on the steam. And not much of a leg on the condensate. I’m don’t know about putting a thermostatic trap on a unit heater either.
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Comments
And the wiring diagram if its there.
If there are sensors, what does the thermostat control? Just the fan? Is there a temp sensor on the piping or coil?
How far away from the heater is the desk? It probably looks like that old Maxell Hi-Fidelity, guy in the chair commercial.
Thought you were "retired and loving it" Up early posting I see.
LOL
Glad your still involved!!
No control valve.
Line voltage thermostat.
Dry return.
Boiler feed pump.
Nothing behind the UH (pipe just goes up top the top).
Air? Good question. Steam pushes it out the trap?
I don't think it would be too bad. The UH is in the corner and the desk is maybe 10 or 15 feet.
The room really does need separate control. It is a corner sun room so I am sure it is hot when the sun is out and cold otherwise. I don't think there was any heat there originally.
They just put in new windows which the women in the room says helps a lot. Se was using an electric heater.
New windows may be to only update to this building - ever.
There should be a thermostat on the supply, though, to prevent the unit from blowing when there is no steam. A strap-on aquastat could be used.
I'm not a bit surprised it bangs a bit. Check the pitch on the steam inlet line -- from the picture it looks pretty darn flat. Also the return line. They don't usually bang, but they can.
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.
Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch