Is this diagram correct for a munchkin boiler

escaseadjug1793177

If you want to use 2 secondary loops I think you want the DHW loop first in line so it gets the hottest water since it will be priority (usually). Also the supply for the DHW should go in the upper port.

A question for you, why do you need an 011 on the primary loop? Would something smaller work?

Larry Savino

Is this diagram correct for a munchkin boiler

I made this scetch for a Munchkin 140 m boiler to replace a Weil Mclean gold boiler Do you feel this is correct?

Larry Savino

Is this diagram correct for a munchkin boiler

Hello folks it has been awhile since I last posted here.

I made this sketch for a Munchkin 140 M boiler to replace a Weil Mclean gold boiler .Do you feel this is correct?

I have been walking thru the water flow in my mind and I almost think I may need to add an additional flow check valve

Thanks Larry

Couderay

Why two secondary loops

Why not pull the loop for the domestic off the loop for the rest of the house (1 set of closely spaced tee's).One primary loop,one secondary loop. I'm asking not suggesting?

Larry Savino

Thanks for the replies. This happens to be my own home I am working on,

Why not pull the loop for the domestic off the loop for the rest of the house (1 set of closely spaced tees).One primary loop, one secondary loop. I'm asking not suggesting?

You want the long answer or the short? I will give you the short now and the long later. Short is I am trying to get a basic, simple, what we do in this house will be the same as the next house, design our guys can memories and with simple thought can duplicate weather or not the have a secondary loop for radiant, hydro air, a bank of circulators feeding a house or a bank of zone valves, My thought is this home will require an 007 for heat and an 011 for the domestic hot water heater.


If you want to use 2 secondary loops I think you want the DHW loop first in line so it gets the hottest water since it will be priority (usually). Also the supply for the DHW should go in the upper port.
With the munchkin the heat circulator get turned off on a call for DHW so it does become the priority zone till it’s satisfied
A question for you, why do you need an 011 on the primary loop? Would something smaller work?


The munchkin is a low mass boiler with a heat exchanger having a pressure drop across the heat exchanger requiring high flow I probably could have done it with a 010 but chose the 011 as we always have them in stock

Thanks again
Larry

Brendan_3

If you pipe it as suggested by the vision 1 manual you will only have to run one pump for DHW production

Larry Savino

If you pipe it as suggested by the vision 1 manual you will only have to run one pump for DHW production

Well I am looking at the vision manual drawing 3b and I see P1 is off so if P1 is off on a call for domestic and I re pipe my drawing it would be for the energy savings? Or a simpler design
My electric rate in our area is 17 cents per KWH that pump pulls 1.76 amps @115 volts = 202 watt hour say it runs 3 hrs a day 3x202=606/1000 = .60per KWH X .17 per KWH = 10 cents per 3 hour day of operation So my total saving per day assuming its running for 3 hrs (standard 2 bath home 4 residents) is 10 cents x 365 days is an additional 36.50 per year
Is the only reason for electrical saving or is the drawing flawed other wise

Larry

Larry Savino

Corrected diagram enclosed

Well it was simple enough to correct I am adding another flow check behind the P1 pump and an addtional ball valve, The cost of thew addtional part would be paid back with in 2 years compaired to the operation of the pump

Larry Savino

Actually I dont think I need an extra flow check I could actually removed the flow check behind the 007 (for the heat load) as the flow check behind the P1 pump would be protecting that area from a flow reversal

chris_93

munchkin piping

Hi, we just put 2 munckins in one 199k and 140k. We piped them both w/ the vision one manual and they work great. By having the second pump for dhw off the primary loop, you can use the priority function built into the boiler. This will also overide the outdoor reset and allow the indirect to receive hw up to the boilers high limit setting. ie. 180 deg.
Good luck
Mike

hot_rod

Another way with only one purge point

this is my method for piping DHW off a mod con. It uses one valve to purge all systems and provide pump isolation.

hot rod

Ted_9

diagram

Larry, now your second piping diagram looks better. Now you can use the Vision 1 Domestic priority feature.

John F

Consider the Munchpak

Larry, if you are looking for repeatability, zoning options, and indirect water tank options, consider the Munchpak from PHP. This is a primary/secondary piping system that you could assemble in about one hour. If you would like more info, please contact me at 503-209-7830.

Larry Savino

Thank you all for the replies, I think we have a plan and I am going pipe out the primary from my drawing and make sure it will all fit in a resonable amount of space so we can consistantly build them the same way,It seams as though the horizontal pipe/header of the primary piping will not have enough lenght to install the spiro vent, 011 pump. flow check,ballvalve, and a "T" to pull out the DHW zone so I just found out they make a verticle spiro vent,

So I may just relocate the spiro vent to the verticle discharge of the of the boiler, relocate the point of no pressure change directly above the spiro vent,relocate the DHW supply line and its circulator just above the point of no pressure change then use an 011with the IFC (no one seams to stock them locally) and with this set up I could actually shorten the horizontal header pipe so it doesnt exstend much past the dimentions of the boiler allowing it to be more compact for use in replacement in excisting homes.

As for the munchpack

I had priced out a php-mp-1250sz at a cost of $4,280.00 I actually question if they were selling me the boiler also I had requested just a starter module as we are always trying to just reconnect to excisting zones or circulators . I was also told the availablity was 3-4 weeks

Have things changed? can I get just a starter module as I have scetched out?

Thanks Again every one.

I will collect my material tomorow and plan on building the primary loop on Saturday once I get a perfect primary loop with a good material list to duplicate it I will then take some pictures and then replace my boiler.

Larry

Roger from Caleffi

Proper piping

Larry, take a look at the attached journal it has some great schematics included.

Glenn Sossin_2

Rename File

Roger In order to open this, I had to rename extension to .pdf

Glenn