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Weird indirect (PAH)

bigugh_4
bigugh_4 Member Posts: 406
> we've been handed the assignment of installing an <BR>
> indirect HW storage tank that has a direct <BR>
> immersion aquastat set up to reside within the <BR>
> hydronic side supply within the tank (suspended <BR>
> in the inlet of the coil).<BR>
> <BR>
> Seems to me that <BR>
> this is a crazy set up! Also potentially <BR>
> dangerous where scalding is concerned.<BR>
> <BR>
> First <BR>
> of all, I'm betting we'll be seeing short cycling <BR>
> due to it (the aquastat) seeing boiler output <BR>
> temps.<BR>
> <BR>
> Secondly, it's BLIND to the actual tank <BR>
> storage temps! <BR>
> <BR>
> Thirdly, I believe it will lag <BR>
> behind temp drop due to being in the coil's <BR>
> water. <BR>
> <BR>
> We're most likely going to cut away <BR>
> the jacket and install a surface mount aquastat <BR>
> on the outer tank wall.<BR>
> <BR>
> Then again, maybe I'm <BR>
> just nuts!<BR>
> <BR>
> _A <BR>
> HREF="http://www.heatinghelp.com/getListed.cfm?id= <BR>
> 98&Step=30"_To Learn More About This Contractor, <BR>
> Click Here to Visit Their Ad in "Find A <BR>
> Contractor"_/A_ <BR>
<BR>

Comments

  • hot_rod
    hot_rod Member Posts: 23,398
    Without naming names....

    we've been handed the assignment of installing an indirect HW storage tank that has a direct immersion aquastat set up to reside within the hydronic side supply within the tank (suspended in the inlet of the coil).

    Seems to me that this is a crazy set up! Also potentially dangerous where scalding is concerned.

    First of all, I'm betting we'll be seeing short cycling due to it (the aquastat) seeing boiler output temps.

    Secondly, it's BLIND to the actual tank storage temps!

    Thirdly, I believe it will lag behind temp drop due to being in the coil's water.

    We're most likely going to cut away the jacket and install a surface mount aquastat on the outer tank wall.

    Then again, maybe I'm just nuts!

    To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • bigugh_4
    bigugh_4 Member Posts: 406
    I can't believe

    There are not responses to this yet! and the wall moves so fast I have brought it back to the top.
    Just at first glance I agree with you. Someone at the manufacture should be able to explain this unusual position of the control placement! I'd be wary of modifing the part as it may destroy the warrenty, and at the same time, may place you in jeporday, if the unto-wared should happen. A disclaimer from the designer (specifier) should and would be the best bet for you. JMHO bigugh
  • Earthfire
    Earthfire Member Posts: 543
    isit

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • Earthfire
    Earthfire Member Posts: 543
    isit

    > we've been handed the assignment of installing an

    > indirect HW storage tank that has a direct

    > immersion aquastat set up to reside within the

    > hydronic side supply within the tank (suspended

    > in the inlet of the coil).

    >

    > Seems to me that

    > this is a crazy set up! Also potentially

    > dangerous where scalding is concerned.

    >

    > First

    > of all, I'm betting we'll be seeing short cycling

    > due to it (the aquastat) seeing boiler output

    > temps.

    >

    > Secondly, it's BLIND to the actual tank

    > storage temps!

    >

    > Thirdly, I believe it will lag

    > behind temp drop due to being in the coil's

    > water.

    >

    > We're most likely going to cut away

    > the jacket and install a surface mount aquastat

    > on the outer tank wall.

    >

    > Then again, maybe I'm

    > just nuts!

    >

    > _A

    > HREF="http://www.heatinghelp.com/getListed.cfm?id=

    > 98&Step=30"_To Learn More About This Contractor,

    > Click Here to Visit Their Ad in "Find A

    > Contractor"_/A_



  • Earthfire
    Earthfire Member Posts: 543
    is it

    supposed to control the boiler water temp to the coil or respond to the domestic water temp?IS it suppossed to be a two stat system one to turn on the circulator and one to fire the boiler as needed on temp differential?
  • bigugh_4
    bigugh_4 Member Posts: 406
    usually the domestic water temp is what is controlled.

    Just like in the ole gas water heater. Why it would be in the hydronic coil I do not understand. Unless it is to contol the inlet hydronic heating temp to a max point, thereby limiting the domestic water at a maximum temp. that however may limit the ability of the tank to procduce its maximun gph heat. Hummm I should like to see the manufactures reply to these questions! bigugh
  • Dave Yates (PAH)
    Dave Yates (PAH) Member Posts: 2,162
    questions

    I've sent the manufacturer a list of questions and await a response.

    While I agree a modification exposes me to increased responsibility, I strongly believe I would be grossly negligent if I ignore the potential problem. An ounce of prevention.....

    To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"
  • bigugh_4
    bigugh_4 Member Posts: 406
    A 'CYA'

    Letter to the owner is another way to handle this. just send it registared mail. so you have a reciept of it. Your concern is exactly mandated. Thereby CYA for yourself is justified! Sheesh, the Lawyers are invading the simplest of jobs. The future you may be required to become a Lawyer before you get a contractors license. Doctors are abandding private practice because of them, what is next no service to P & HVACbecaus of insurance cost brought about by Lawyers. Just imagine that!!!
  • Guy_5
    Guy_5 Member Posts: 159
    Indirect

    Actually, if this is the tank I believe it is, the sensor is nestled up in the center of the coils in the base of the tank. It seems to work well,however I have in the past had a problem with the differential setting. By the time it called the boiler on, the tank temp. had fallen lower than I would have liked. I prefer the old, mechanical control that they previously had. Actually I have that (old style) tank in my own home and it performs well. Then again, I am the first in a house of 6 to shower.
This discussion has been closed.