bypass and old gravity systems

Harvey Ramer

I am converting a gravity system to circulation and adding a radiant floor system. If i do primary and secondary piping and set the gravity system circulator to run continually and install thermostatic radiator valves, is the pump going to burn up if i get a freak warm day.

j a_2

bypass and old gravity return

installing a burnham scg on a old but fairly small capicity gravity return system it was already changed over to a pumped system...my guestion is this,i am looking for a simple bypass piping schematic with instructions on how to regulate the return temp to keep the temp in the boiler up,any help would be appreciated thanks

Timco

Is the boiler not reaching the desired temp with circulation, or are there multi zones and you want return temp protection?

Tim

j a_2

bypass

piped boiler today but not quite done. sparky coming to power up monday...this a single zone and i piped the pumbing ayay module with bypass before tie circ....thanks

Timco

Most gravity return systems did not have a bypass, and if your system is all on one zone, there is no need for a bypass. I had a gravity return system that was converted and could not get to 180*, and it needed a bypass. Is there a specific reason you want a bypass on a system like this? Could you post a picture?

Tim

Walt_7

convert Hot water heater

I use a wood coal stove and want to install a U tube stainless steel pipe in to this stove to preheat my hot water tank in the wintermonths. I would like to do this without a circulator, has anybody got any schematics or drawings how this can be done. I would bypass the stove in
the summer. thanks.
I live in syracuse NY

Timco

Sounds like a fine bomb, actually...how would you control the water temp or expansion of the water? A tank in the basement that reaches basement temp alone would help, or maybe a GFX HX?

Tim

Timco

If you have gravity now (2-pipe) no. You can only use TRVs with a 2-pipe system. Do yo know the required flow rate for your boiler? You will need that info for the pri loop...

Tim

tk_3

Adjust the flow through the boiler for about a 40º delta T

Harvey Ramer

It is a 2 pipe supply and 2 pipe return system. I won't know the flow rate till i get my heat loss calculation back. I'm not quite sure on the proper installation method for the TRV's.