2 Heat Exchangers - Overkill?

TechShop · 08-07-15, 04:58 AM

To begin, I have a new Carrier model 50YDS049NCD311.
That's a re-badged Climatemaster 4 ton indoor split GSHP.

My project involves converting this system into a hydronic heat pump. The way I intend to do this is to build an enclosure on top of the existing unit which will house the following components:

1) 4-ton TXV (Sporlan CBBIZE-4-GA)
2) Filter Dryer (Sporlan Catch-All)
3) Sight Glass (Sporlan See-All)
4) 4-ton or larger heat exchanger(s)
5) circulation pump (will feed a water storage tank)

This week I came into a pair (two) of these TurboTec BTSSN-48 coaxial heat exchangers (see attached performance graphs).

Is there any downside to running two of these 4-ton rated heat exchangers in parallel?

Do I stand to gain much in efficiency or should I just run a single HX and save the other for a future project / shelf-spare?

Thanks. As I get going on this I'll start posting up some photos, etc of my project.

08-07-15, 04:58 AM	#1
TechShop FNG Join Date: Jul 2015 Location: Washington Posts: 71 Thanks: 8 Thanked 19 Times in 13 Posts	2 Heat Exchangers - Overkill? To begin, I have a new Carrier model 50YDS049NCD311. That's a re-badged Climatemaster 4 ton indoor split GSHP. My project involves converting this system into a hydronic heat pump. The way I intend to do this is to build an enclosure on top of the existing unit which will house the following components: 1) 4-ton TXV (Sporlan CBBIZE-4-GA) 2) Filter Dryer (Sporlan Catch-All) 3) Sight Glass (Sporlan See-All) 4) 4-ton or larger heat exchanger(s) 5) circulation pump (will feed a water storage tank) This week I came into a pair (two) of these TurboTec BTSSN-48 coaxial heat exchangers (see attached performance graphs). Is there any downside to running two of these 4-ton rated heat exchangers in parallel? Do I stand to gain much in efficiency or should I just run a single HX and save the other for a future project / shelf-spare? Thanks. As I get going on this I'll start posting up some photos, etc of my project.