Radiant Manifold

Radiant Manifold

PostBy: Phil May On: Wed Jan 30, 2013 6:07 pm

I have an 8 loop stainless radiant manifold from pex supply. It has the valves and flow gauges. The only way I can get circulation is by backing the flow gauges out 3-4 turns. It worked fine untill a week ago. Is my pump taking a crap. I took one of the flow gauges out and examined it all looks fine. My pump is a 3 speed Grunfos 26-99 FC The pump is supposed to handle the head and flow on the low setting. I have been running it on high. The floor has 8-250' loops of 1/2" pex and less tha 10' of 1" copper to and from header. I have a b&g mixing valve. The loops flow unresrticted when I checked them. The flow gauges have not really worked good at all but they did flow for the first 2-3 weeks after install.
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700

Re: Radiant Manifold

PostBy: Sting On: Wed Jan 30, 2013 6:46 pm

if the system is keeping the load - pump drama is unlikely

more likely the meter is for sizzel :)
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Radiant Manifold

PostBy: Phil May On: Wed Jan 30, 2013 6:52 pm

you lost me
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700


Re: Radiant Manifold

PostBy: Sting On: Wed Jan 30, 2013 6:58 pm

Sting wrote:if the system is keeping the load - pump drama is unlikely



Phil May wrote:The loops flow unresrticted when I checked them.


answer above due to statement above

Sting wrote:more likely the meter is for sizzel :)



[quote="Phil The flow gauges have not really worked good at all but they did flow for the first 2-3 weeks after install.[/quote]

BINGO
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Radiant Manifold

PostBy: Rob R. On: Wed Jan 30, 2013 7:09 pm

The loops and pump are probably fine...those flow meters are notoriously inaccurate. If in doubt, measure the in/out temperature of the loops.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Radiant Manifold

PostBy: Phil May On: Fri Feb 01, 2013 5:27 pm

Any reason that I have to turn them out to get flow? I did not think you were supposed to touch them.
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700

Re: Radiant Manifold

PostBy: Rigar On: Fri Feb 01, 2013 8:37 pm

Sting wrote:if the system is keeping the load - pump drama is unlikely

more likely the meter is for sizzel :)


...ma nizzel. ??
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace