Efm700 gravity flow valve

Efm700 gravity flow valve

PostBy: Bigblock472ci On: Tue Feb 25, 2014 3:32 pm

Hello all
I live in a house from 1896. It is a double block with no insulation very hard to heat. I have two heat zones (two thermostats). My question is can I switched my two flow control valves to gravity to help try to keep up with the demand for heat. Even though my two pumps are okay. Thanks
Last edited by Bigblock472ci on Tue Feb 25, 2014 6:19 pm, edited 1 time in total.
Bigblock472ci
 
Stoker Coal Boiler: Efm700
Hand Fed Coal Stove: Estate Heatrola
Coal Size/Type: Buck nut pea
Stove/Furnace Make: EFM 700

Re: Efm700

PostBy: Rob R. On: Tue Feb 25, 2014 5:14 pm

What you have proposed won't put any extra btu's into the house, but it might keep the system temperature more stable.

It won't hurt to try...but you might have to make some other adjustments to keep the upper floor from getting too warm. Hot water will try to rise to the highest point in the system. Maybe try opening the flow control valve for the downstairs zone and leave the other one alone.

The next time the wind is roaring at your house walk around and take note of the drafts and cold spots. Spend some time sealing up the leaks.

Are you currently heating the house with the 700?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: Efm700

PostBy: Bigblock472ci On: Tue Feb 25, 2014 5:32 pm

Thanks for the reply. Yes I am currently using the efm700. I have the valves open since morning. The pressure in the stoker came down to normal since they are open. The house is a hell of a lot warmer now. One thermostat is reading higher than where it is set. I close off that radiator halfway in the room where that thermostat is. Seems to be working great.
Bigblock472ci
 
Stoker Coal Boiler: Efm700
Hand Fed Coal Stove: Estate Heatrola
Coal Size/Type: Buck nut pea
Stove/Furnace Make: EFM 700

Re: Efm700 gravity flow valve

PostBy: Phil May On: Tue Feb 25, 2014 6:32 pm

You have other issue's. maybe the flow controls were set wrong? Maybe the pumps are getting worn? What you did should not have corrected the problem if everything was set right to start. Hydraulics is hard to figure out because the dont make pipe and fixtures see thru.
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700

Re: Efm700 gravity flow valve

PostBy: Bigblock472ci On: Tue Feb 25, 2014 7:18 pm

I read on this site that there are screens in the gravity flow valves that block up is this true?
Bigblock472ci
 
Stoker Coal Boiler: Efm700
Hand Fed Coal Stove: Estate Heatrola
Coal Size/Type: Buck nut pea
Stove/Furnace Make: EFM 700

Re: Efm700 gravity flow valve

PostBy: Phil May On: Tue Feb 25, 2014 7:25 pm

Not in the ones I have used.
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700

Re: Efm700 gravity flow valve

PostBy: Rob R. On: Tue Feb 25, 2014 7:28 pm

I don't understand why the pressure in the boiler would change...but I am glad you are warming up. :)
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy