Help Installing Munchkin Boiler


  #1  
Old 10-20-05, 10:31 AM
n3srk
Visiting Guest
Posts: n/a
Help Installing Munchkin Boiler

I'm looking into replacing my old American Standard boiler with a new Munchkin 80m with an indirect DHW tank (ssu-20). Looking at the plumbing diagram in their installation manual is giving me a little trouble. I made the diagram available here: http://www.the-mcdonalds.org/boiler/fig_2d.pdf .
What is the purpose of P1? Do I even need it?
My current setup has 1 circulator that comes on with the boiler when the thermostat calls for heat.
What do I need to control P2 and zone 1 (my existing plumbing)?
What is the purpose of the loop created by the closely spaced tees?
Thanks.
 
  #2  
Old 10-20-05, 10:59 AM
S
Member
Join Date: Aug 2005
Location: Philadelphia area
Posts: 31
Upvotes: 0
Received 0 Upvotes on 0 Posts
Originally Posted by n3srk
I'm looking into replacing my old American Standard boiler with a new Munchkin 80m with an indirect DHW tank (ssu-20). Looking at the plumbing diagram in their installation manual is giving me a little trouble. I made the diagram available here: http://www.the-mcdonalds.org/boiler/fig_2d.pdf .
What is the purpose of P1? Do I even need it?
My current setup has 1 circulator that comes on with the boiler when the thermostat calls for heat.
What do I need to control P2 and zone 1 (my existing plumbing)?
What is the purpose of the loop created by the closely spaced tees?
Thanks.
Ha!! I am in process of doing the very same setup, except that I am using Peerless equipment which (I read somewhere) is identical to munchking, so let's keep in touch!

Don't take my words for granded since I am very new to this!
I believe P2 and zone circulators need to be controlled by control board, such as
http://www.peerlessboilers.com/home/...ontrol_410.pdf
Control board is very cool and hi-tech, and will probably improve efficiency of the system, but it costs close to $500

or
switching relay, such as TACO SR502 ~$80:
http://www.taco-hvac.com/uploads/Fil...ry/100-9.0.pdf
Switching relay takes inputs from termostat on your wall and aquastat from the heater. Based on the input it will issue call for heat to the boiler which will activate boiler circulator as well as activate appropriate zone circulator.
Relay also has priority that you can set for the water heater.

Here is the explanation of the closely spaced tees loop:
http://www.findarticles.com/p/articl...1/ai_n13481024
The summory is:
"P/S piping lets several circulators of different pumping ability "co-exist" within the same system without interfering with each other. In effect, the closely spaced tees allow each circuit to be thought of as a standalone circuit, not connected to the other circuits. You might even say that a circulator in a given circuit of a P/S system "doesn't know the other circulators and piping circuits even exist." This isolating effect makes it relatively easy to design sophisticated multi-load systems without concern over how flow rates and pressure drops will change as various circulators turn on and off."

Also, I have a picture of fully installed Munchkin boiler with the loop shown. I can email it to you if you want.
 
  #3  
Old 10-20-05, 07:23 PM
n3srk
Visiting Guest
Posts: n/a
Thanks,I would like to see that picture. You can email me: raym at the domain where I posted the installation diagram.

I don't think I'll need the fancy control board -- didn't really plan on changing anything but we had a storm come through a couple weeks ago that knocked bricks out of my chimney. Found out the whole chimney is bad My boiler (accordind to the pump) is 35 years old. I'm trying to save as much money as I can. Go high efficiency or fix chimney and line it and take my chances on the old boiler. With the cost of natural gas rising I think a new boiler is the way to go.

Thanks for the links, I need all the learnin' I can get.
 
  #4  
Old 10-20-05, 07:52 PM
S
Member
Join Date: Aug 2005
Location: Philadelphia area
Posts: 31
Upvotes: 0
Received 0 Upvotes on 0 Posts
see:
http://www.geocities.com/slvr00gt/munchkin_setup.jpg

Also, check out my other post for all the drawings I came up with for my upcoming install:
http://forum.doityourself.com/showthread.php?t=237079
 
 

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