Does a steam boiler need an aquastat?

Reply

  #1  
Old 10-29-08, 11:28 AM
S
Member
Thread Starter
Join Date: Oct 2008
Location: USA
Posts: 9
Received 0 Votes on 0 Posts
Does a steam boiler need an aquastat?

I would assume most or all oil fired steam boilers are cold start. Has anyone ever heard of having an aquastat on the steam boiler to keep the temperature up?
 
  #2  
Old 10-29-08, 08:36 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,358
Received 32 Votes on 30 Posts
Aquastat on Steamer

When a steam boiler has a tankless coil for domestic hot water an aquastat is always installed.
 
  #3  
Old 10-30-08, 02:54 PM
S
Member
Thread Starter
Join Date: Oct 2008
Location: USA
Posts: 9
Received 0 Votes on 0 Posts
Thanks...

.. in this situation the tankless hot water coil is actually the hot water baseboard for another apartment unit (no domestic hot water off this system).

So on a warm day, my aquastat and steam boiler are still keeping the water at 170ish. I'm thinking my only solution is an outdoor reset. Thoughts?
 
  #4  
Old 10-30-08, 04:51 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,358
Received 32 Votes on 30 Posts
Aquastat

All that's needed is a high limit aquastat wired in series with the thermostat & burner control. It seems you have a triple aquastat.
 
  #5  
Old 11-03-08, 02:08 PM
S
Member
Thread Starter
Join Date: Oct 2008
Location: USA
Posts: 9
Received 0 Votes on 0 Posts
I believe it's a single function aquastat: Info here.

That aquastat is the only thing wired to the boiler control. The thermostat from the living quarters goes to the zone switching relay (info here), but that never connects to the boiler cotrol.

Should I wire from the zone switching realy to the aquastat to the boiler?


 
  #6  
Old 11-03-08, 06:30 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,358
Received 32 Votes on 30 Posts
Pictures Please

I think I understand what's going on but some pictures of the boiler & control scheme would help. You can post them on photobucket.com or similar photo hosting site & provide a link here.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: