Hydra Delta Geothermal problem

Discussion in 'HVAC' started by Curious, Aug 9, 2005.

  1. Curious

    Curious Guest

    Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother board
    has a 2 amp time delay fuse on it.

    What is this fuse for? The fuse was blown, not a short, but it appears to be
    an overload that caused the failure.

    Does this fuse protect the board or the transformer and thermostat?

    Thanks
    Rich

    BTW, I forgot the get the model numbers, but its a two stage HydroHeat for
    sure, about three years old.

    Rich
    Curious, Aug 9, 2005
    #1
    1. Advertising

  2. On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    wrote:

    >Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother board
    >has a 2 amp time delay fuse on it.
    >
    >What is this fuse for? The fuse was blown, not a short, but it appears to be
    >an overload that caused the failure.
    >
    >Does this fuse protect the board or the transformer and thermostat?


    If you have to ask, you have no business putting your hands in
    the unit. Call a pro.

    >
    >Thanks
    >Rich
    >
    >BTW, I forgot the get the model numbers, but its a two stage HydroHeat for
    >sure, about three years old.
    >
    >Rich
    >


    Click here every day to feed an animal that needs you today !!!

    http://www.theanimalrescuesite.com/

    Paul ( pjm @ pobox . com ) - remove spaces to email me
    'Some days, it's just not worth chewing through the restraints.'
    'With sufficient thrust, pigs fly just fine.'
    HVAC/R program for Palm PDA's
    Free demo now available online http://pmilligan.net/palm/
    pjm@see_my_sig_for_address.com, Aug 10, 2005
    #2
    1. Advertising

  3. On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    wrote:

    >Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother board
    >has a 2 amp time delay fuse on it.
    >
    >What is this fuse for? The fuse was blown, not a short, but it appears to be
    >an overload that caused the failure.
    >
    >Does this fuse protect the board or the transformer and thermostat?


    If you have to ask, you have no business putting your hands in
    the unit. Call a pro.

    >
    >Thanks
    >Rich
    >
    >BTW, I forgot the get the model numbers, but its a two stage HydroHeat for
    >sure, about three years old.
    >
    >Rich
    >


    Click here every day to feed an animal that needs you today !!!

    http://www.theanimalrescuesite.com/

    Paul ( pjm @ pobox . com ) - remove spaces to email me
    'Some days, it's just not worth chewing through the restraints.'
    'With sufficient thrust, pigs fly just fine.'
    HVAC/R program for Palm PDA's
    Free demo now available online http://pmilligan.net/palm/
    pjm@see_my_sig_for_address.com, Aug 10, 2005
    #3
  4. Curious

    Geoman Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    > wrote:
    >
    >>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother board
    >>has a 2 amp time delay fuse on it.
    >>
    >>What is this fuse for? The fuse was blown, not a short, but it appears to
    >>be
    >>an overload that caused the failure.
    >>
    >>Does this fuse protect the board or the transformer and thermostat?

    >
    > If you have to ask, you have no business putting your hands in
    > the unit. Call a pro.


    Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    the recieving end LOL!!!

    Seriously, we didn't have time to get into the prints and all, the customer
    was a bunch of kids renting a place and we had several commercial accounts
    down. Found the bad fuse and pick some up today at Radio Shack, but hoped to
    find out before going back what the fuse was for.

    I'm assuming here without having prints, that its to protect the board from
    a short on the transformer and thermostat side. Also, the fuse looks like
    an overload condtion and not a short. Went to the Hydra Delta site and of
    course they don't have anything worth looking at there. I was hoping to see
    a print but most prints don't show that crap anyway.

    On Tranes boards the fuse protects for over amperage on contactors not on
    the board, but I have no idea what this one does.

    Later

    Rich




    >>
    >>Thanks
    >>Rich
    >>
    >>BTW, I forgot the get the model numbers, but its a two stage HydroHeat for
    >>sure, about three years old.
    >>
    >>Rich
    >>

    >
    > Click here every day to feed an animal that needs you today !!!
    >
    > http://www.theanimalrescuesite.com/
    >
    > Paul ( pjm @ pobox . com ) - remove spaces to email me
    > 'Some days, it's just not worth chewing through the restraints.'
    > 'With sufficient thrust, pigs fly just fine.'
    > HVAC/R program for Palm PDA's
    > Free demo now available online http://pmilligan.net/palm/
    Geoman, Aug 10, 2005
    #4
  5. Curious

    Geoman Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    > wrote:
    >
    >>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother board
    >>has a 2 amp time delay fuse on it.
    >>
    >>What is this fuse for? The fuse was blown, not a short, but it appears to
    >>be
    >>an overload that caused the failure.
    >>
    >>Does this fuse protect the board or the transformer and thermostat?

    >
    > If you have to ask, you have no business putting your hands in
    > the unit. Call a pro.


    Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    the recieving end LOL!!!

    Seriously, we didn't have time to get into the prints and all, the customer
    was a bunch of kids renting a place and we had several commercial accounts
    down. Found the bad fuse and pick some up today at Radio Shack, but hoped to
    find out before going back what the fuse was for.

    I'm assuming here without having prints, that its to protect the board from
    a short on the transformer and thermostat side. Also, the fuse looks like
    an overload condtion and not a short. Went to the Hydra Delta site and of
    course they don't have anything worth looking at there. I was hoping to see
    a print but most prints don't show that crap anyway.

    On Tranes boards the fuse protects for over amperage on contactors not on
    the board, but I have no idea what this one does.

    Later

    Rich




    >>
    >>Thanks
    >>Rich
    >>
    >>BTW, I forgot the get the model numbers, but its a two stage HydroHeat for
    >>sure, about three years old.
    >>
    >>Rich
    >>

    >
    > Click here every day to feed an animal that needs you today !!!
    >
    > http://www.theanimalrescuesite.com/
    >
    > Paul ( pjm @ pobox . com ) - remove spaces to email me
    > 'Some days, it's just not worth chewing through the restraints.'
    > 'With sufficient thrust, pigs fly just fine.'
    > HVAC/R program for Palm PDA's
    > Free demo now available online http://pmilligan.net/palm/
    Geoman, Aug 10, 2005
    #5
  6. On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:

    >
    ><pjm@see_my_sig_for_address.com> wrote in message
    >news:...
    >> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >> wrote:
    >>
    >>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother board
    >>>has a 2 amp time delay fuse on it.
    >>>
    >>>What is this fuse for? The fuse was blown, not a short, but it appears to
    >>>be
    >>>an overload that caused the failure.
    >>>
    >>>Does this fuse protect the board or the transformer and thermostat?

    >>
    >> If you have to ask, you have no business putting your hands in
    >> the unit. Call a pro.

    >
    >Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >the recieving end LOL!!!


    You morphing little bastid :)

    >
    >Seriously, we didn't have time to get into the prints and all, the customer
    >was a bunch of kids renting a place and we had several commercial accounts
    >down. Found the bad fuse and pick some up today at Radio Shack, but hoped to
    >find out before going back what the fuse was for.
    >
    >I'm assuming here without having prints, that its to protect the board from
    >a short on the transformer and thermostat side.


    Very unlikely. What's the VA on the xformer ? 40-50, I would
    guess ? The fuse is there to protect IT.

    Easy way to tell, if you cant' follow the traces for whatever
    reason. - pull the fuse, ohm out from the socket to the xformer. If
    one side of the fuse holder reads 0 to one side of the transformer,
    that's the answer.


    > Also, the fuse looks like
    >an overload condtion and not a short. Went to the Hydra Delta site and of
    >course they don't have anything worth looking at there. I was hoping to see
    >a print but most prints don't show that crap anyway.
    >
    >On Tranes boards the fuse protects for over amperage on contactors not on
    >the board, but I have no idea what this one does.
    >
    >Later
    >
    >Rich
    >
    >
    >
    >
    >>>
    >>>Thanks
    >>>Rich
    >>>
    >>>BTW, I forgot the get the model numbers, but its a two stage HydroHeat for
    >>>sure, about three years old.
    >>>
    >>>Rich
    >>>

    >>
    >> Click here every day to feed an animal that needs you today !!!
    >>
    >> http://www.theanimalrescuesite.com/
    >>
    >> Paul ( pjm @ pobox . com ) - remove spaces to email me
    >> 'Some days, it's just not worth chewing through the restraints.'
    >> 'With sufficient thrust, pigs fly just fine.'
    >> HVAC/R program for Palm PDA's
    >> Free demo now available online http://pmilligan.net/palm/

    >


    Click here every day to feed an animal that needs you today !!!

    http://www.theanimalrescuesite.com/

    Paul ( pjm @ pobox . com ) - remove spaces to email me
    'Some days, it's just not worth chewing through the restraints.'
    'With sufficient thrust, pigs fly just fine.'
    HVAC/R program for Palm PDA's
    Free demo now available online http://pmilligan.net/palm/
    pjm@see_my_sig_for_address.com, Aug 10, 2005
    #6
  7. On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:

    >
    ><pjm@see_my_sig_for_address.com> wrote in message
    >news:...
    >> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >> wrote:
    >>
    >>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother board
    >>>has a 2 amp time delay fuse on it.
    >>>
    >>>What is this fuse for? The fuse was blown, not a short, but it appears to
    >>>be
    >>>an overload that caused the failure.
    >>>
    >>>Does this fuse protect the board or the transformer and thermostat?

    >>
    >> If you have to ask, you have no business putting your hands in
    >> the unit. Call a pro.

    >
    >Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >the recieving end LOL!!!


    You morphing little bastid :)

    >
    >Seriously, we didn't have time to get into the prints and all, the customer
    >was a bunch of kids renting a place and we had several commercial accounts
    >down. Found the bad fuse and pick some up today at Radio Shack, but hoped to
    >find out before going back what the fuse was for.
    >
    >I'm assuming here without having prints, that its to protect the board from
    >a short on the transformer and thermostat side.


    Very unlikely. What's the VA on the xformer ? 40-50, I would
    guess ? The fuse is there to protect IT.

    Easy way to tell, if you cant' follow the traces for whatever
    reason. - pull the fuse, ohm out from the socket to the xformer. If
    one side of the fuse holder reads 0 to one side of the transformer,
    that's the answer.


    > Also, the fuse looks like
    >an overload condtion and not a short. Went to the Hydra Delta site and of
    >course they don't have anything worth looking at there. I was hoping to see
    >a print but most prints don't show that crap anyway.
    >
    >On Tranes boards the fuse protects for over amperage on contactors not on
    >the board, but I have no idea what this one does.
    >
    >Later
    >
    >Rich
    >
    >
    >
    >
    >>>
    >>>Thanks
    >>>Rich
    >>>
    >>>BTW, I forgot the get the model numbers, but its a two stage HydroHeat for
    >>>sure, about three years old.
    >>>
    >>>Rich
    >>>

    >>
    >> Click here every day to feed an animal that needs you today !!!
    >>
    >> http://www.theanimalrescuesite.com/
    >>
    >> Paul ( pjm @ pobox . com ) - remove spaces to email me
    >> 'Some days, it's just not worth chewing through the restraints.'
    >> 'With sufficient thrust, pigs fly just fine.'
    >> HVAC/R program for Palm PDA's
    >> Free demo now available online http://pmilligan.net/palm/

    >


    Click here every day to feed an animal that needs you today !!!

    http://www.theanimalrescuesite.com/

    Paul ( pjm @ pobox . com ) - remove spaces to email me
    'Some days, it's just not worth chewing through the restraints.'
    'With sufficient thrust, pigs fly just fine.'
    HVAC/R program for Palm PDA's
    Free demo now available online http://pmilligan.net/palm/
    pjm@see_my_sig_for_address.com, Aug 10, 2005
    #7
  8. Curious

    Geoman Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >
    >>
    >><pjm@see_my_sig_for_address.com> wrote in message
    >>news:...
    >>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>> wrote:
    >>>
    >>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>board
    >>>>has a 2 amp time delay fuse on it.
    >>>>
    >>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>to
    >>>>be
    >>>>an overload that caused the failure.
    >>>>
    >>>>Does this fuse protect the board or the transformer and thermostat?
    >>>
    >>> If you have to ask, you have no business putting your hands in
    >>> the unit. Call a pro.

    >>
    >>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >>the recieving end LOL!!!

    >
    > You morphing little bastid :)
    >
    >>
    >>Seriously, we didn't have time to get into the prints and all, the
    >>customer
    >>was a bunch of kids renting a place and we had several commercial accounts
    >>down. Found the bad fuse and pick some up today at Radio Shack, but hoped
    >>to
    >>find out before going back what the fuse was for.
    >>
    >>I'm assuming here without having prints, that its to protect the board
    >>from
    >>a short on the transformer and thermostat side.

    >
    > Very unlikely. What's the VA on the xformer ? 40-50, I would
    > guess ? The fuse is there to protect IT.
    >
    > Easy way to tell, if you cant' follow the traces for whatever
    > reason. - pull the fuse, ohm out from the socket to the xformer. If
    > one side of the fuse holder reads 0 to one side of the transformer,
    > that's the answer.
    > HVAC/R program for Palm PDA's
    > Free demo now available online http://pmilligan.net/palm/


    That is a slick way to test that situation, that would have saved me time on
    a roof top when I found that darn Trane glass fuse blown. It was a sticking
    compressor relay if I'm not mistaken.

    Thanks Paul, this may helps since Hydro Heat is about worthless for
    information. This is the first one we worked on, they aren't very popular in
    our area.

    Rich
    Geoman, Aug 10, 2005
    #8
  9. Curious

    Geoman Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >
    >>
    >><pjm@see_my_sig_for_address.com> wrote in message
    >>news:...
    >>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>> wrote:
    >>>
    >>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>board
    >>>>has a 2 amp time delay fuse on it.
    >>>>
    >>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>to
    >>>>be
    >>>>an overload that caused the failure.
    >>>>
    >>>>Does this fuse protect the board or the transformer and thermostat?
    >>>
    >>> If you have to ask, you have no business putting your hands in
    >>> the unit. Call a pro.

    >>
    >>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >>the recieving end LOL!!!

    >
    > You morphing little bastid :)
    >
    >>
    >>Seriously, we didn't have time to get into the prints and all, the
    >>customer
    >>was a bunch of kids renting a place and we had several commercial accounts
    >>down. Found the bad fuse and pick some up today at Radio Shack, but hoped
    >>to
    >>find out before going back what the fuse was for.
    >>
    >>I'm assuming here without having prints, that its to protect the board
    >>from
    >>a short on the transformer and thermostat side.

    >
    > Very unlikely. What's the VA on the xformer ? 40-50, I would
    > guess ? The fuse is there to protect IT.
    >
    > Easy way to tell, if you cant' follow the traces for whatever
    > reason. - pull the fuse, ohm out from the socket to the xformer. If
    > one side of the fuse holder reads 0 to one side of the transformer,
    > that's the answer.
    > HVAC/R program for Palm PDA's
    > Free demo now available online http://pmilligan.net/palm/


    That is a slick way to test that situation, that would have saved me time on
    a roof top when I found that darn Trane glass fuse blown. It was a sticking
    compressor relay if I'm not mistaken.

    Thanks Paul, this may helps since Hydro Heat is about worthless for
    information. This is the first one we worked on, they aren't very popular in
    our area.

    Rich
    Geoman, Aug 10, 2005
    #9
  10. On Tue, 9 Aug 2005 22:28:00 -0400, "Geoman" <> wrote:

    >
    ><pjm@see_my_sig_for_address.com> wrote in message
    >news:...
    >> On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >>
    >>>
    >>><pjm@see_my_sig_for_address.com> wrote in message
    >>>news:...
    >>>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>>> wrote:
    >>>>
    >>>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>>board
    >>>>>has a 2 amp time delay fuse on it.
    >>>>>
    >>>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>>to
    >>>>>be
    >>>>>an overload that caused the failure.
    >>>>>
    >>>>>Does this fuse protect the board or the transformer and thermostat?
    >>>>
    >>>> If you have to ask, you have no business putting your hands in
    >>>> the unit. Call a pro.
    >>>
    >>>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >>>the recieving end LOL!!!

    >>
    >> You morphing little bastid :)
    >>
    >>>
    >>>Seriously, we didn't have time to get into the prints and all, the
    >>>customer
    >>>was a bunch of kids renting a place and we had several commercial accounts
    >>>down. Found the bad fuse and pick some up today at Radio Shack, but hoped
    >>>to
    >>>find out before going back what the fuse was for.
    >>>
    >>>I'm assuming here without having prints, that its to protect the board
    >>>from
    >>>a short on the transformer and thermostat side.

    >>
    >> Very unlikely. What's the VA on the xformer ? 40-50, I would
    >> guess ? The fuse is there to protect IT.
    >>
    >> Easy way to tell, if you cant' follow the traces for whatever
    >> reason. - pull the fuse, ohm out from the socket to the xformer. If
    >> one side of the fuse holder reads 0 to one side of the transformer,
    >> that's the answer.

    >
    >That is a slick way to test that situation, that would have saved me time on
    >a roof top when I found that darn Trane glass fuse blown. It was a sticking
    >compressor relay if I'm not mistaken.


    Sticking relay won't blow a control fuse.

    >Thanks Paul, this may helps since Hydro Heat is about worthless for
    >information. This is the first one we worked on, they aren't very popular in
    >our area.
    >
    >Rich
    >


    BTW - what exactly would 'a short on the transformer or
    thermostat side' do to the board ? Inherently, the thermostat is a
    set of controlled shorts. Switches, IOW. Short that wire out
    anywhere, and either the transformer blows, or something runs when
    it's not supposed to :)

    The fuse is there for the xformer, nothing else.


    Click here every day to feed an animal that needs you today !!!

    http://www.theanimalrescuesite.com/

    Paul ( pjm @ pobox . com ) - remove spaces to email me
    'Some days, it's just not worth chewing through the restraints.'
    'With sufficient thrust, pigs fly just fine.'
    HVAC/R program for Palm PDA's
    Free demo now available online http://pmilligan.net/palm/
    pjm@see_my_sig_for_address.com, Aug 10, 2005
    #10
  11. On Tue, 9 Aug 2005 22:28:00 -0400, "Geoman" <> wrote:

    >
    ><pjm@see_my_sig_for_address.com> wrote in message
    >news:...
    >> On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >>
    >>>
    >>><pjm@see_my_sig_for_address.com> wrote in message
    >>>news:...
    >>>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>>> wrote:
    >>>>
    >>>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>>board
    >>>>>has a 2 amp time delay fuse on it.
    >>>>>
    >>>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>>to
    >>>>>be
    >>>>>an overload that caused the failure.
    >>>>>
    >>>>>Does this fuse protect the board or the transformer and thermostat?
    >>>>
    >>>> If you have to ask, you have no business putting your hands in
    >>>> the unit. Call a pro.
    >>>
    >>>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >>>the recieving end LOL!!!

    >>
    >> You morphing little bastid :)
    >>
    >>>
    >>>Seriously, we didn't have time to get into the prints and all, the
    >>>customer
    >>>was a bunch of kids renting a place and we had several commercial accounts
    >>>down. Found the bad fuse and pick some up today at Radio Shack, but hoped
    >>>to
    >>>find out before going back what the fuse was for.
    >>>
    >>>I'm assuming here without having prints, that its to protect the board
    >>>from
    >>>a short on the transformer and thermostat side.

    >>
    >> Very unlikely. What's the VA on the xformer ? 40-50, I would
    >> guess ? The fuse is there to protect IT.
    >>
    >> Easy way to tell, if you cant' follow the traces for whatever
    >> reason. - pull the fuse, ohm out from the socket to the xformer. If
    >> one side of the fuse holder reads 0 to one side of the transformer,
    >> that's the answer.

    >
    >That is a slick way to test that situation, that would have saved me time on
    >a roof top when I found that darn Trane glass fuse blown. It was a sticking
    >compressor relay if I'm not mistaken.


    Sticking relay won't blow a control fuse.

    >Thanks Paul, this may helps since Hydro Heat is about worthless for
    >information. This is the first one we worked on, they aren't very popular in
    >our area.
    >
    >Rich
    >


    BTW - what exactly would 'a short on the transformer or
    thermostat side' do to the board ? Inherently, the thermostat is a
    set of controlled shorts. Switches, IOW. Short that wire out
    anywhere, and either the transformer blows, or something runs when
    it's not supposed to :)

    The fuse is there for the xformer, nothing else.


    Click here every day to feed an animal that needs you today !!!

    http://www.theanimalrescuesite.com/

    Paul ( pjm @ pobox . com ) - remove spaces to email me
    'Some days, it's just not worth chewing through the restraints.'
    'With sufficient thrust, pigs fly just fine.'
    HVAC/R program for Palm PDA's
    Free demo now available online http://pmilligan.net/palm/
    pjm@see_my_sig_for_address.com, Aug 10, 2005
    #11
  12. Curious

    Geoman Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 22:28:00 -0400, "Geoman" <> wrote:
    >
    >>
    >><pjm@see_my_sig_for_address.com> wrote in message
    >>news:...
    >>> On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >>>
    >>>>
    >>>><pjm@see_my_sig_for_address.com> wrote in message
    >>>>news:...
    >>>>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>>>> wrote:
    >>>>>
    >>>>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>>>board
    >>>>>>has a 2 amp time delay fuse on it.
    >>>>>>
    >>>>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>>>to
    >>>>>>be
    >>>>>>an overload that caused the failure.
    >>>>>>
    >>>>>>Does this fuse protect the board or the transformer and thermostat?
    >>>>>
    >>>>> If you have to ask, you have no business putting your hands in
    >>>>> the unit. Call a pro.
    >>>>
    >>>>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be
    >>>>on
    >>>>the recieving end LOL!!!
    >>>
    >>> You morphing little bastid :)
    >>>
    >>>>
    >>>>Seriously, we didn't have time to get into the prints and all, the
    >>>>customer
    >>>>was a bunch of kids renting a place and we had several commercial
    >>>>accounts
    >>>>down. Found the bad fuse and pick some up today at Radio Shack, but
    >>>>hoped
    >>>>to
    >>>>find out before going back what the fuse was for.
    >>>>
    >>>>I'm assuming here without having prints, that its to protect the board
    >>>>from
    >>>>a short on the transformer and thermostat side.
    >>>
    >>> Very unlikely. What's the VA on the xformer ? 40-50, I would
    >>> guess ? The fuse is there to protect IT.
    >>>
    >>> Easy way to tell, if you cant' follow the traces for whatever
    >>> reason. - pull the fuse, ohm out from the socket to the xformer. If
    >>> one side of the fuse holder reads 0 to one side of the transformer,
    >>> that's the answer.

    >>
    >>That is a slick way to test that situation, that would have saved me time
    >>on
    >>a roof top when I found that darn Trane glass fuse blown. It was a
    >>sticking
    >>compressor relay if I'm not mistaken.

    >
    > Sticking relay won't blow a control fuse.


    The relay was sticking OPEN, not closed. The slide was worn and wouldn't let
    the contact pull in and the amps exceeded the fuse rating. This was on a 15
    ton Trane RTU. Sorry I didn't state that it was stuck 'energized" Very
    unusual to find this happening, and then when we changed out the darn fuse
    it would run for about a week and then do it again.


    >
    >>Thanks Paul, this may helps since Hydro Heat is about worthless for
    >>information. This is the first one we worked on, they aren't very popular
    >>in
    >>our area.
    >>
    >>Rich
    >>

    >
    > BTW - what exactly would 'a short on the transformer or
    > thermostat side' do to the board ? Inherently, the thermostat is a
    > set of controlled shorts. Switches, IOW. Short that wire out
    > anywhere, and either the transformer blows, or something runs when
    > it's not supposed to :)
    >
    > The fuse is there for the xformer, nothing else.


    The fuse however indicates an overload and not a short, this may turn out to
    be a PITA repair. IF the amperage is fine when we do the tests and IF it
    runs for a few days and then blows a fuse again, then its going to be a
    nasty cat and mouse game.


    >
    >
    > Click here every day to feed an animal that needs you today !!!
    >
    > http://www.theanimalrescuesite.com/
    >
    > Paul ( pjm @ pobox . com ) - remove spaces to email me
    > 'Some days, it's just not worth chewing through the restraints.'
    > 'With sufficient thrust, pigs fly just fine.'
    > HVAC/R program for Palm PDA's
    > Free demo now available online http://pmilligan.net/palm/
    Geoman, Aug 10, 2005
    #12
  13. Curious

    Geoman Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 22:28:00 -0400, "Geoman" <> wrote:
    >
    >>
    >><pjm@see_my_sig_for_address.com> wrote in message
    >>news:...
    >>> On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >>>
    >>>>
    >>>><pjm@see_my_sig_for_address.com> wrote in message
    >>>>news:...
    >>>>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>>>> wrote:
    >>>>>
    >>>>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>>>board
    >>>>>>has a 2 amp time delay fuse on it.
    >>>>>>
    >>>>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>>>to
    >>>>>>be
    >>>>>>an overload that caused the failure.
    >>>>>>
    >>>>>>Does this fuse protect the board or the transformer and thermostat?
    >>>>>
    >>>>> If you have to ask, you have no business putting your hands in
    >>>>> the unit. Call a pro.
    >>>>
    >>>>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be
    >>>>on
    >>>>the recieving end LOL!!!
    >>>
    >>> You morphing little bastid :)
    >>>
    >>>>
    >>>>Seriously, we didn't have time to get into the prints and all, the
    >>>>customer
    >>>>was a bunch of kids renting a place and we had several commercial
    >>>>accounts
    >>>>down. Found the bad fuse and pick some up today at Radio Shack, but
    >>>>hoped
    >>>>to
    >>>>find out before going back what the fuse was for.
    >>>>
    >>>>I'm assuming here without having prints, that its to protect the board
    >>>>from
    >>>>a short on the transformer and thermostat side.
    >>>
    >>> Very unlikely. What's the VA on the xformer ? 40-50, I would
    >>> guess ? The fuse is there to protect IT.
    >>>
    >>> Easy way to tell, if you cant' follow the traces for whatever
    >>> reason. - pull the fuse, ohm out from the socket to the xformer. If
    >>> one side of the fuse holder reads 0 to one side of the transformer,
    >>> that's the answer.

    >>
    >>That is a slick way to test that situation, that would have saved me time
    >>on
    >>a roof top when I found that darn Trane glass fuse blown. It was a
    >>sticking
    >>compressor relay if I'm not mistaken.

    >
    > Sticking relay won't blow a control fuse.


    The relay was sticking OPEN, not closed. The slide was worn and wouldn't let
    the contact pull in and the amps exceeded the fuse rating. This was on a 15
    ton Trane RTU. Sorry I didn't state that it was stuck 'energized" Very
    unusual to find this happening, and then when we changed out the darn fuse
    it would run for about a week and then do it again.


    >
    >>Thanks Paul, this may helps since Hydro Heat is about worthless for
    >>information. This is the first one we worked on, they aren't very popular
    >>in
    >>our area.
    >>
    >>Rich
    >>

    >
    > BTW - what exactly would 'a short on the transformer or
    > thermostat side' do to the board ? Inherently, the thermostat is a
    > set of controlled shorts. Switches, IOW. Short that wire out
    > anywhere, and either the transformer blows, or something runs when
    > it's not supposed to :)
    >
    > The fuse is there for the xformer, nothing else.


    The fuse however indicates an overload and not a short, this may turn out to
    be a PITA repair. IF the amperage is fine when we do the tests and IF it
    runs for a few days and then blows a fuse again, then its going to be a
    nasty cat and mouse game.


    >
    >
    > Click here every day to feed an animal that needs you today !!!
    >
    > http://www.theanimalrescuesite.com/
    >
    > Paul ( pjm @ pobox . com ) - remove spaces to email me
    > 'Some days, it's just not worth chewing through the restraints.'
    > 'With sufficient thrust, pigs fly just fine.'
    > HVAC/R program for Palm PDA's
    > Free demo now available online http://pmilligan.net/palm/
    Geoman, Aug 10, 2005
    #13
  14. Curious

    TURTLE Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 22:28:00 -0400, "Geoman" <> wrote:
    >
    >>
    >><pjm@see_my_sig_for_address.com> wrote in message
    >>news:...
    >>> On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >>>
    >>>>
    >>>><pjm@see_my_sig_for_address.com> wrote in message
    >>>>news:...
    >>>>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>>>> wrote:
    >>>>>
    >>>>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>>>board
    >>>>>>has a 2 amp time delay fuse on it.
    >>>>>>
    >>>>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>>>to
    >>>>>>be
    >>>>>>an overload that caused the failure.
    >>>>>>
    >>>>>>Does this fuse protect the board or the transformer and thermostat?
    >>>>>
    >>>>> If you have to ask, you have no business putting your hands in
    >>>>> the unit. Call a pro.
    >>>>
    >>>>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >>>>the recieving end LOL!!!
    >>>
    >>> You morphing little bastid :)
    >>>
    >>>>
    >>>>Seriously, we didn't have time to get into the prints and all, the
    >>>>customer
    >>>>was a bunch of kids renting a place and we had several commercial accounts
    >>>>down. Found the bad fuse and pick some up today at Radio Shack, but hoped
    >>>>to
    >>>>find out before going back what the fuse was for.
    >>>>
    >>>>I'm assuming here without having prints, that its to protect the board
    >>>>from
    >>>>a short on the transformer and thermostat side.
    >>>
    >>> Very unlikely. What's the VA on the xformer ? 40-50, I would
    >>> guess ? The fuse is there to protect IT.
    >>>
    >>> Easy way to tell, if you cant' follow the traces for whatever
    >>> reason. - pull the fuse, ohm out from the socket to the xformer. If
    >>> one side of the fuse holder reads 0 to one side of the transformer,
    >>> that's the answer.

    >>
    >>That is a slick way to test that situation, that would have saved me time on
    >>a roof top when I found that darn Trane glass fuse blown. It was a sticking
    >>compressor relay if I'm not mistaken.

    >
    > Sticking relay won't blow a control fuse.
    >
    > Paul ( pjm @ pobox . com )


    This is Turtle.

    Keep Guessing here and he will still keep teaching you the business. i can't
    believe they did not teach you about a unloaded set of contactor coil with no
    metal in the middle will burn the coil or blow the fuse in Software Salesmen
    School. You don't power up a coil without any load in the middle.

    And No , Bullshit is not the universial answer to everything that you like to
    use.

    TURTLE
    TURTLE, Aug 10, 2005
    #14
  15. Curious

    TURTLE Guest

    <pjm@see_my_sig_for_address.com> wrote in message
    news:...
    > On Tue, 9 Aug 2005 22:28:00 -0400, "Geoman" <> wrote:
    >
    >>
    >><pjm@see_my_sig_for_address.com> wrote in message
    >>news:...
    >>> On Tue, 9 Aug 2005 20:00:24 -0400, "Geoman" <> wrote:
    >>>
    >>>>
    >>>><pjm@see_my_sig_for_address.com> wrote in message
    >>>>news:...
    >>>>> On Tue, 9 Aug 2005 18:49:10 -0400, "Curious" <>
    >>>>> wrote:
    >>>>>
    >>>>>>Customer has a Hydra Delta, (Hydro Heat) two stage unit. The mother
    >>>>>>board
    >>>>>>has a 2 amp time delay fuse on it.
    >>>>>>
    >>>>>>What is this fuse for? The fuse was blown, not a short, but it appears
    >>>>>>to
    >>>>>>be
    >>>>>>an overload that caused the failure.
    >>>>>>
    >>>>>>Does this fuse protect the board or the transformer and thermostat?
    >>>>>
    >>>>> If you have to ask, you have no business putting your hands in
    >>>>> the unit. Call a pro.
    >>>>
    >>>>Hey Paul, it was me, Geoman asking! Man, I now know what its like to be on
    >>>>the recieving end LOL!!!
    >>>
    >>> You morphing little bastid :)
    >>>
    >>>>
    >>>>Seriously, we didn't have time to get into the prints and all, the
    >>>>customer
    >>>>was a bunch of kids renting a place and we had several commercial accounts
    >>>>down. Found the bad fuse and pick some up today at Radio Shack, but hoped
    >>>>to
    >>>>find out before going back what the fuse was for.
    >>>>
    >>>>I'm assuming here without having prints, that its to protect the board
    >>>>from
    >>>>a short on the transformer and thermostat side.
    >>>
    >>> Very unlikely. What's the VA on the xformer ? 40-50, I would
    >>> guess ? The fuse is there to protect IT.
    >>>
    >>> Easy way to tell, if you cant' follow the traces for whatever
    >>> reason. - pull the fuse, ohm out from the socket to the xformer. If
    >>> one side of the fuse holder reads 0 to one side of the transformer,
    >>> that's the answer.

    >>
    >>That is a slick way to test that situation, that would have saved me time on
    >>a roof top when I found that darn Trane glass fuse blown. It was a sticking
    >>compressor relay if I'm not mistaken.

    >
    > Sticking relay won't blow a control fuse.
    >
    > Paul ( pjm @ pobox . com )


    This is Turtle.

    Keep Guessing here and he will still keep teaching you the business. i can't
    believe they did not teach you about a unloaded set of contactor coil with no
    metal in the middle will burn the coil or blow the fuse in Software Salesmen
    School. You don't power up a coil without any load in the middle.

    And No , Bullshit is not the universial answer to everything that you like to
    use.

    TURTLE
    TURTLE, Aug 10, 2005
    #15
  16. Curious

    Geoman Guest

    Results

    Found that the unit is definatly a 2 stage. The relay board has four million
    relays on it, what a joke!! Im sure I was told up at ASHRAE in Chicago about
    six years ago that this board was once used in Carrier systems.

    Fan and pump relays .9 amps
    First stage cool 1.36
    Second stage cool 1.64 amps

    This unit had a 2 amp in it. I wonder if anyone has a phone number to Hydra
    delta, the old number I had is no longer working and the web site dosen't
    show one.

    Rich

    M# 03-042-WTAR-MT mEGA tEK
    Geoman, Aug 10, 2005
    #16
  17. Curious

    Geoman Guest

    Results

    Found that the unit is definatly a 2 stage. The relay board has four million
    relays on it, what a joke!! Im sure I was told up at ASHRAE in Chicago about
    six years ago that this board was once used in Carrier systems.

    Fan and pump relays .9 amps
    First stage cool 1.36
    Second stage cool 1.64 amps

    This unit had a 2 amp in it. I wonder if anyone has a phone number to Hydra
    delta, the old number I had is no longer working and the web site dosen't
    show one.

    Rich

    M# 03-042-WTAR-MT mEGA tEK
    Geoman, Aug 10, 2005
    #17
  18. Don't know the number you are using, might try: 412.373.5800
    "Geoman" <> wrote in message
    news:p...
    > Results
    >
    > Found that the unit is definatly a 2 stage. The relay board has four

    million
    > relays on it, what a joke!! Im sure I was told up at ASHRAE in Chicago

    about
    > six years ago that this board was once used in Carrier systems.
    >
    > Fan and pump relays .9 amps
    > First stage cool 1.36
    > Second stage cool 1.64 amps
    >
    > This unit had a 2 amp in it. I wonder if anyone has a phone number to

    Hydra
    > delta, the old number I had is no longer working and the web site dosen't
    > show one.
    >
    > Rich
    >
    > M# 03-042-WTAR-MT mEGA tEK
    >
    >
    Anthony Berlin, Aug 11, 2005
    #18
  19. Don't know the number you are using, might try: 412.373.5800
    "Geoman" <> wrote in message
    news:p...
    > Results
    >
    > Found that the unit is definatly a 2 stage. The relay board has four

    million
    > relays on it, what a joke!! Im sure I was told up at ASHRAE in Chicago

    about
    > six years ago that this board was once used in Carrier systems.
    >
    > Fan and pump relays .9 amps
    > First stage cool 1.36
    > Second stage cool 1.64 amps
    >
    > This unit had a 2 amp in it. I wonder if anyone has a phone number to

    Hydra
    > delta, the old number I had is no longer working and the web site dosen't
    > show one.
    >
    > Rich
    >
    > M# 03-042-WTAR-MT mEGA tEK
    >
    >
    Anthony Berlin, Aug 11, 2005
    #19
  20. Curious

    TURTLE Guest

    "Geoman" <> wrote in message
    news:p...
    > Results
    >
    > Found that the unit is definatly a 2 stage. The relay board has four million
    > relays on it, what a joke!! Im sure I was told up at ASHRAE in Chicago about
    > six years ago that this board was once used in Carrier systems.
    >
    > Fan and pump relays .9 amps
    > First stage cool 1.36
    > Second stage cool 1.64 amps
    >
    > This unit had a 2 amp in it. I wonder if anyone has a phone number to Hydra
    > delta, the old number I had is no longer working and the web site dosen't show
    > one.
    >
    > Rich
    >
    > M# 03-042-WTAR-MT mEGA tEK
    >


    This is Turtle.

    I think this job was messed up because the lack of math skills.

    TURTLE
    TURTLE, Aug 12, 2005
    #20
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