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Messages - Flyboy206

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1
Plumbing / Re: Manifold diagram or pics
« on: January 18, 2018, 07:27:37 PM »
Thanks for the diagram, I was overthinking this.

Another question, I have a 50ft run from the OWB to get inside, once inside, I need to go vertical 12ft, 40ft across the truss, and down at least 6ft to tie into the HX. Any issues with this run other than initial air purge?

Plan to use Logster then transition to PEX for the inside run.

2
Plumbing / Re: Manifold diagram or pics
« on: January 16, 2018, 01:07:33 PM »
Sweat or threaded fittings easier to work with?

3
Plumbing / Manifold diagram or pics
« on: January 16, 2018, 01:01:29 PM »
Going to collect the pieces and parts for my manifold this week. Looking for pictures or drawings to follow.

This will be the closed  loop coming from the heat exchanger to the 3 floor zones. From earlier discussions on here, 1 1/4 copper to and from the HX. Mixing valve and pump for each zone. Expansion tank and air vent. Suggestions on placement of ball valves and drain and fill? Will the check valves in the circulators be all that I need?

Appreciate the input



4
Plumbing / Re: Primary loop PEX size
« on: December 19, 2017, 09:30:40 AM »
That poor guy was me, wasn't to bad. I'll try to get a pic of the manifold this weekend.

5
Plumbing / Re: Primary loop PEX size
« on: December 19, 2017, 07:44:42 AM »
I checked last night. This 7/8 ID pex.

6
Plumbing / Re: Primary loop PEX size
« on: December 18, 2017, 11:44:45 AM »
What about a check valve in the loop from the HE?

7
Plumbing / Re: Primary loop PEX size
« on: December 18, 2017, 10:27:18 AM »
Had one of the supply houses do the specs for the floor before I had done much research. So that is what I have in the slab to work with.
Initial design was for an open system. I decided I wanted to keep the boiler water out of my floor and use a heat exchanger, may add glycol in the future.
After all the advice, plan now is 1 1/4 pex from boiler to HE and return. 1 1/4 loop from HE, 1" branches to each zone, individual mixing valve and pump for each zone, expansion tank and air eliminator (in the main loop from HE?). Thermostat for each zone with a 3 zone controller.

Anything else I need to consider? This will be my first go around with an OWB. G200 coming Friday.

Appreciate all the help.

8
Plumbing / Re: Primary loop PEX size
« on: December 18, 2017, 09:32:51 AM »
It's 7/8 OD pex (orange) 3/4 ID, 7 loops, 1 zone in the shop. House is 5/8 OD, 1/2 ID, 6 loops, 2 zones.


9
Plumbing / Re: Primary loop PEX size
« on: December 18, 2017, 06:58:49 AM »
Should be 3/4 ID, I'll have to check for sure. I can install one mixing valve for each zone if that will help with the flow. Any recommendation on what size heat exchanger?

10
Plumbing / Re: Primary loop PEX size
« on: December 17, 2017, 05:08:22 PM »
My thought was to install the mixing valve on the supply line from the plate exchanger, prior to the pumps. Whenever a zone calls for heat it will get tempered water. The primary from the boiler will be continuous circulation through the plate exchanger back to the boiler.

11
Plumbing / Re: Primary loop PEX size
« on: December 17, 2017, 09:47:10 AM »
wreckit,

Appreciate the reply. I had already posted it this, but am on moderator probation. LOL

I would like to separate the systems with a heat exchanger so the floor is a closed system. I have a 1740 sq. ft. house and a 2480 sq. fit connected shop I am trying to heat. Eventually I will add DHW, but for now, just want to get the floor heat up and running

Looks like I should use 1 1/4 for the long run. Taco chart shows a max flow rate of 11.2 GPM for 1 1/4.

Suggestions on what size heat exchanger to use that won't restrict the flow rate? If all zones are calling for heat, flow rate will be around 15 GPM on the radiant side with 120* water.

Have 2 zones in the house, 1/2 inch, 3 loops each. 1 zone in the shop, 7/8 inch, 7 loops. All loops are 300ft.

What am I missing or need to do different?

12
Plumbing / Primary loop PEX size
« on: December 16, 2017, 11:04:16 AM »
Been lurking and reading on here for a year or so. Finally getting ready for the install.
Have a few questions, and this board is a wealth of knowledge.

I am setting up in slab floor heat, 3 zones. Two for the house and one in the attached shop. Have a mixing valve, relay, and each zone has a dedicated pump.

Total BTU required when all zones call for heat is calculated at 94,732 BTU. Will be using a G200 for heat.

My question is sizing the primary loop and max flow rate. Total run is about 214 ft.  My numbers tell me I need 9 to 10GPM in the primary to keep a 20 degree temp diff on the return when all the zones are calling for heat. Once the floor is up to temp, will the 1" Thermopex work to keep the temps stable?

Thanks,
Terry

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