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Re: Change in my repiping/buffer tank schedule

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Posted by Dave on December 01, 2005 at 21:12:36:

In Reply to: Re: Change in my repiping/buffer tank schedule posted by Heatpro on December 01, 2005 at 18:59:10:

Your piping suggestion, modified to have the same piping of:
+ the bottom 2-inch to the boiler inlet,
+ the middle 2-inch tap to the boiler outlet.
+ The top 2-inch tap to the supply manifold stub disconnected from the manifold and manifold removed

+ the return stub from the zones piped to a tee on the tank bottom 2-inch boiler inlet line

+ the spirovent and expansion tank on the 1-inch top tank tap.

I like the above scheme better because the water does not constantly run through the boiler until the tank calls for heat.

Just a few questions though about the above scheme:

1. In the Lochinvar tank, the 2 2" pipes that you call bottom and middle are only a few inches apart. Is that OK?

2. The supply manifold pipe would be removed completely from the tee it's attached to presently and piped to the top of tank? It won't require another pump but will just rely on flow from the zone pumps?

3.Would the 1.5" return manifold pipe and boiler inlet pipe be teed right at the tank? Do either of these pipes or any others in the scheme require check valves (except for the 0010 pump)?

4. Taco 0010 would have integral checkvalve.

5. How would Spirovent and exp tank as well as inlet valve be piped into 1" tap on tank? (their configuration). I thought the Spirovent had inflow and outflow connections.

6. With the much increased volume of the system, is my Extrol Model 60 expansion tank adequate?

7. In this situation, would the 0010 be turned on by the aquastat in the tank?

Thank you so much.

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