Munchkin Piping

Rick_18

I am going to install a Munchkin 140M boiler with Superstore indirect tank, witha Vision 1 System.
I will have radiant floor in the basement, a Unico A/C with hot water coil, garage infloor tubing, sidewalk tubing and some dive way tubing.
In the Vision 1 manual there are several piping diagrams to use fro the system. I have never installed this type of boiler or system and am looking for the bset advise and drawing to follow for the installation.
I have set up a Tru-Flow manifold with telestats for my basement heat and will make a manifold with a heat exchanger for the garage and drive.
Any suggestions?

Dof3

Piping

Rick, I have followed the recomennded piping in the installation guide with good success. I have 12 systems in right now and they are working very well. Make sure you use a good heat load and get the GPM to your zones properly sized. I use the Wirsbo software for all my sizing.LOL

hr

Sounds like

a lot of load for a 140,00 what with sidewalk and drive way, and all. Make sure your calcs are right.

The drawing with P/S piping would be the method I recommend from the installation manual.

hot rod

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Rick_18

Munchkin Piping

The square foot for the radiant is as follows:
Garage 26' x 26'
Driveway (only partial) 26' x 22'
Sidewalk 4' x 35'
Basement Slab 61' x 34'
The basement has 1-1/2" insulation while the rest is 2"

The hot water coil in the Unico is is 140,000 BTU and the heat exchanger is 125, 000 BTU for the garage/drive.

Ted_9

So you have a heat load inj the house of 140,000 btus and radiant and snowmelt of 125,000?

My question is 2 part; how many Munchkin 140s are you installing and if the answer is one then which is the proirity system.

BTW, the Munchkin 140 doesnt put out 140,000 btus, its about 126,000 for high temp heating.

PATRIOT HEATING & COOLING, INC.

Rick_18

Munchkin Piping

Only one boiler! Relied to much on salesman for cals! New Wick home with a total of 1,780 living space main and basement floors!

Mark Eatherton1

That works out to

70 btu/sq foot per hour. Is this a log cabin without chinking???

ME

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hr

Depending on the

performance you expect from the snowmelt and your snowfall amounts.. Figure at least 100 BTU/ sq. ft. Or about 72,000 for the melt.

That leaves you around 55,000 for the heat in the home. Figure 10- 15,000 for the garage, ball park of course. Now you have about 40 K left for heating and DHW.

Is the house a total 1700, or do you have that on two levels?

Really a heatloss calc for the home and shop would be a good step to assure you have everything covered. It can be a challange to have snowmelt and heating on one boiler. Generally the boiler ends up grossly oversized for the heating only loads. Add up the numbers.

hot rod

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Rick_18

Mark what is chinking?
The coil may be oversized as the radiant floor will take care of the basement.
Yes there are two levels!
Sounds like I may be in trouble wth only one boiler!

Mark Eatherton1

Chinking...

is the rubbery compound they put between the logs to keep the wind from blowing through the walls.

I'd ask for a copy of the heat loss calculations, and if one wasn't done, DO ONE.

ME

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S Ebels

You got

Some major issues to get resolved before you buy anything my friend. That Unico needs fairly high water temp to deliver any useful amount of heat. The radiant portion, which will be the lion's share of your load, needs lower water temps. Your job presents a number of challenges that require an experienced hand in design. I would highly recommend you seek some local "eyes on" advice from someone who has done this before. With what you are trying to blend together there, it's not going to be "plug and play".