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1

HeatMaster / Re: Damper position issue

« on: November 13, 2019, 05:58:59 PM »

Thanks I'll give that a try. It was delivered to my place late summer 2017. I ordered it spring of 2017.

2

HeatMaster / Damper position issue

« on: November 13, 2019, 12:52:20 PM »

I have a problem with my G200. It's only a couple years old but only has been ru6for one year. Situation:
Start a fire, get boiler up to setpoint and leave. Come back, boiler no longer meeting setpoint, open up firebox and see wood is just smoldering. Damper position is 38% but water temperature is 140 deg.  I have to turn it off and turn it back on to get it to open to 100%. This is getting very frustrating. It just started doing this in the past couple weeks. I noted that there is some tar around the damper and it doesnt turn to open in a smooth fashion, acts like the tar is gumming it up a little.

3

HeatMaster / In slab design

« on: October 27, 2018, 09:51:56 AM »

I wanted to reduce the temperature of my in slab loop using a 3way mixing valve.   In the furnace installation guide it showes two circulator pumps in a primary/secondary configuration.  This is a normal configuration and is generally required to protect a standard boiler from thermal shock. I was wondering if that is really required on a heatmaster?  My thoughts are that the boiler has a large holding tank and a circulator pumps dedicated to mixing the water inside the boiler. It seems highly unlikely that any thermal shock would be happening with this setup.  I didn’t want to setup my boiler in a primary secondary configuration unless absolutely necessary.

Also how are you guys controlling your in slab heat?

4

HeatMaster / Re: G200 with storage?

« on: April 26, 2017, 09:18:58 PM »

sorry, I've been off line for a while.  I used several methods to come up with the 50,000 heat load to the house using online calculators but that didn't include the sidearm for DMHW I calculated at 21000 btu or the future hot tub (no idea yet on BTU).  It's a 2300sf log home, well chinked and very few openings in the walls.  The shop is 1800sf but only heating about 1700sf because some of it will be a walk in cooler for hanging meat.  I came up with 33,000 btu on the shop keeping it at 65 deg.

5

HeatMaster / Re: G200 with storage?

« on: April 13, 2017, 09:16:54 PM »

so anyone got an answer to my circulator sizing questions?

6

HeatMaster / Re: G200 with storage?

« on: April 12, 2017, 08:23:50 PM »

I'm glad you posted that link because it reminds me of another question I have.  I ran through that whole taco circulator selection step by step and I got stumped when you determine the length of the piping.  Are you supposed to include all piping from the the boiler to the header in the house and are you supposed to times that by two because it is a supply and return?  Are you supposed to add all of your circuits together or just use the longest run? 

7

HeatMaster / Re: G200 with storage?

« on: April 11, 2017, 08:45:23 PM »

I selected the G200 for a handful of reasons one of them being that I also have plans of converting an additional 1200 sf of log garage into a small cottage and I'd eventually route pipe to it too AND if I still had capacity I even considered a small hot tub by the house.  When I did my house, cottage and shop calculations (including house DHW) I came up with 122265 btu.  I live in Northern Idaho at about 3200 ft elevation.  I know the 1" is borderline for serving my house load so I decided 1 1/4 in case i did decide to add a hot tub to that load.  I already ordered the G200 so there's no going back now.  Part of the problem is the published numbers on the rating.  I was confused about the difference between the 8hr output and max BTU numbers and I figured I'd rather be a little over sized than a little undersized.  I've recently read some material on another site that explained the difference.

8

HeatMaster / Re: G200 with storage?

« on: April 10, 2017, 09:02:21 PM »

My house load is about 50,000btu and my shop looks like it's going to be 30 x 60 but only putting pex in 30 x 45 portion of slab.  I calculated my shop to be about 32,000 btu.  The boiler will be located on a slab right outside and next to my shop, which is about 80 ft from the house.  I was going to route my piping from my boiler to the shop with 3/4" pipe. From there I'll go to a 5 loop header for my slab.  I assume a small circulator would be all that I need for that configuration.  My house will have 8 zones and I was hoping I have enough boiler capacity to support a side arm on my existing electric water heater so let's just assume 9 zones at my house.  I was planning on running about 80ft of 1 1/4 underground thermopex to the house, penetrate the basement wall (about 4 ft underground) I would immediately go to a circulator and then the zone header where I'd control the zones with valves. 

Does the above sound reasonable?  Knowing the boiler has two inlets and outlets,  I'm still confused about how I will run the piping to both house and shop but still have adequate flow through boiler using it's circulator for that?  It kind of looks like the circulator for the boiler has its own separately piped inlets and outlets, is that true?   

9

HeatMaster / G200 with storage?

« on: April 09, 2017, 09:12:40 PM »

Hi I'm a soon to be owner of a G200.  I'm heating a 2300 sf home and a shop floor.  I have enough engineering skill to be dangerous and I can't really afford to pay a licensed engineer to design the system for me.  I've done all my load calculations utilizing various methods online as a check, which is how I determined the G200 should be adequate.  I have several questions on system design that I was hoping a few of you experts out there might help me out with.  The first is regarding storage.  I see many of the other owners who own EKO or TARM style units are installing either pressurized or non-pressurized storage tanks but I'm not seeing many, if any, heatmaster owners talking about storage.  Why?  I was considering installing a 500 gal storage tank but the design question I have is: with the heatmaster being atmospheric does that mean I need to either install a heat exchanger to use a pressurized storage tank or use a non-pressurized tank?  In either case, it seems to me that this would provide a way to decouple system storage from boiler so that I could put glycol in the boiler for protection for weekend getaways.

Regardless of storage, are most of you using a primary/secondary configuration?  It seem to me that heatmaster already kind of assumes that because the boiler comes with a circulator with literature that says it is for boiler flow only. 

If the boiler is atmospheric then does that mean you don't need to consider system expansion at warm up (expansion tank?) 

I would like to post some basic equipment and load data with some of my design assumptions and have you guys shoot holes in it.  Would you be willing to do that?

Much appreciated,

Robert

10

HeatMaster / Re: G series manual footprint drawing correction

« on: April 09, 2017, 08:34:49 PM »

I got a new G 200 that isn't shipped yet.  I want to get the pad poured in advance.  I need to know if 21 is correct or not?  Can someone help me?