bleeding and the like

Reply

  #1  
Old 11-25-05, 01:35 PM
L
LaGattaDJ
Visiting Guest
Posts: n/a
Question bleeding and the like

Hello,

I have read almost all posts regarding bleeding air from a boiler system when there are NO bleeds on each individual base board radiator, however, none really match the set up I have. Here is what I have, large 2400 sq. ft. house, longest heat run is probably over 70 feet from boiler to radiator. I have 4 zones and I just dont believe the bbr's are as hot as they should be which leads me to believe there may be air in the system. I have posted some photos for your consideration with the hopes it will help you formulate an answer on how to get the air out. Thanks!! To view pics, go to: http://members.aol.com/lagattadj/boiler/

Dave
 
Sponsored Links
  #2  
Old 11-25-05, 02:51 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,151
Received 19 Votes on 17 Posts
System 2000

Do you hear water running in the system? If not, air is problably not your problem. BTW, nice looking Seagrave. What year? Still active?
 
  #3  
Old 11-25-05, 03:00 PM
L
LaGattaDJ
Visiting Guest
Posts: n/a
Thanks Grady for the compliment on the 1962 531-KB-1000 Seagrave Pumper. She is in great running order, all 12 cylinders, no longer in service but is my own personal rig. It occupies about half of my garage.

Gee, I can't hear any water running through the pipes....I guess that rules out air. Is the psi of 20 an issue?

Thanks for the help.

Dave
 
  #4  
Old 11-25-05, 03:17 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,151
Received 19 Votes on 17 Posts
Dave

The 20 psi is a bit high but I would not be concerned unless it goes higher. Those gauges are notorious for their inaccuracy.

Re: Seagrave: Twelve cyl. OHV or flathead? Being a '62 I would have to presume OHV. 2 plugs/cyl?
 
  #5  
Old 11-25-05, 03:31 PM
L
LaGattaDJ
Visiting Guest
Posts: n/a
Grady,

12 cyl. Flat Head. Yes on 2 plugs per cylinder as well as two completely seperate ignition systems.....FD fail safes! When I bought her, 6/12 pistons were melted. Rebuilt engine, started her up the first time and....... no oil pressure. Tore the oil pan off AGAIN, replaced oil pump and what do ya know, OIL Pressure was great.....guess I know why the pistons melted down.

OK, 15 x 15 foot room, 2 windows in room, how many feet of fin tube???

Dave
 
  #6  
Old 11-25-05, 03:40 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,151
Received 19 Votes on 17 Posts
Fin tube

Gotta have a little more info. Insulation (walls & ceiling), window size, ceiling height, number of outside walls. This is just for the heating & using the short form, LOL
 
  #7  
Old 11-25-05, 04:24 PM
L
LaGattaDJ
Visiting Guest
Posts: n/a
Here goes,

Walls 2x6 R19, celing height 8', 2 outside walls, celing insulation R21, window size 60" x 31" times 2.

Thanks,

Dave
 
  #8  
Old 11-25-05, 04:44 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,151
Received 19 Votes on 17 Posts
Red face Forgot stuff

I also need to know about the windows (double pane?), any doors on outside walls, & floor insulation (on grade, over crawl, over bsmt [heated or no]). Sorry.
 
  #9  
Old 11-25-05, 04:52 PM
L
LaGattaDJ
Visiting Guest
Posts: n/a
Grady,

Double glazed low E glass, r-19 in the floor, basement temp 60 degrees all winter, yes heated to 60, no doors leading to the outside.

Tahnsk,

Dave
 
  #10  
Old 11-25-05, 05:14 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,151
Received 19 Votes on 17 Posts
Fin tube

Quick "short form" calculation shows about a 5000 btu/hr heat loss. Figuring 500 btu/hr/ft, this says 10 ft. of bsbd.
 
  #11  
Old 11-25-05, 05:16 PM
L
LaGattaDJ
Visiting Guest
Posts: n/a
thanks Grady!!! Guess I need to figure out why the bsbd is not as hot as I think it should be.

Dave
 
  #12  
Old 11-25-05, 05:22 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,151
Received 19 Votes on 17 Posts
"cool" baseboard

After the heat has been on a while (aprox. 10-15 minutes) feel the pipes at the ends of the baseboard. If they are hot, the fins may need cleaning out. You would be surprised how much dust, lint, & especially pet hair collects on the fins. If not hot, check the boiler temperature.
 
  #13  
Old 11-25-05, 05:27 PM
L
LaGattaDJ
Visiting Guest
Posts: n/a
Grady,

They are so hot in fact I can only leave my hand on the el. for a brief amount of time.......guess i will clean the fins next to see if thats the problem. Boiler temp is a steady 170 - 175.

Dave
 
  #14  
Old 11-25-05, 05:34 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,151
Received 19 Votes on 17 Posts
Another common problem

If there is not a couple of inches opening at the bottom of the baseboard it cannot conduct heat as it should. Often houses which have been retro-fitted with carpet have the carpet too close to the bottom of the bsbd.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


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