Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 23

Thread: Jandy ain't dandy...

  1. Back To Top    #1

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Jandy ain't dandy...

    This thing has been driving me crazy. It's fine... then I go away and my wife tries to heat the spa and.. it's not fine. I am starting to think it's personal. Like CHRISTINE the killer car.
    argh.
    So we have a properly functioning pool system (it seems) in all other ways. Diatomacious earth filter gets semi-annual re-do... and shows 10-20 psi after a top bleed consistently. Pumps work perfectly, automation switches are good and the servos to change pool-spa-pool are good.
    The heater shows LOW PRESSURE sometimes and there doesn't seem to be rhyme nor reason to it.
    It's also home to a bunch of nasty black widow spiders, so I wouldn't mind if the thing just exploded in general.
    But... I should probably just fix it. I've no training in this or hvac etc, but I restore and build custom/vintage motorcycles so I know how to spin a wrench. My gut says it's a wonky pressure switch (where would that be located?) and... anyone have a quick and dirty way to use an ohmmeter to find out if this one is copacetic or not?
    Attached Images Attached Images
    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  2. Back To Top    #2

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Re: Jandy ain't dandy...

    i was gonna add more pix but the system won't let me -- ?
    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Jandy ain't dandy...

    Look for something screwed into the plumbing with a grey and a purple wire connecting to it. Well... if this is the manual for your heater: http://www.zodiacpoolsystems.com//~/...ads/h/h0286900

    If you jumper it and the thing works, either the switch is bad or you have low pressure. The 15 psi you have ought to be enough to close the thing. Page 36 of that manual shows what the switch looks like and how to adjust it. Page 53 is an exploded view of things.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  4. Back To Top    #4

    TFP Guide
    PAGirl's Avatar
    Join Date
    Jun 2012
    Location
    Central PA
    Posts
    2,388

    Re: Jandy ain't dandy...

    Quote Originally Posted by alacrity View Post
    i was gonna add more pix but the system won't let me -- ?
    Upload to a service such as Photobucket, then paste the IMG link into the post.
    26' X 52" Intex Ultra Frame. Intex Sand Filter
    26' X 52 Intex Ultra Frame Install
    You can lead a horse to (clear) water, but you can't force him to swim in it!

  5. Back To Top    #5

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Re: Jandy ain't dandy...

    Quote Originally Posted by PAGirl View Post
    Upload to a service such as Photobucket, then paste the IMG link into the post.
    Ok i will, thanks!!
    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  6. Back To Top    #6

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Re: Jandy ain't dandy...

    Quote Originally Posted by Richard320 View Post
    Look for something screwed into the plumbing with a grey and a purple wire connecting to it. Well... if this is the manual for your heater: http://www.zodiacpoolsystems.com//~/...ads/h/h0286900

    If you jumper it and the thing works, either the switch is bad or you have low pressure. The 15 psi you have ought to be enough to close the thing. Page 36 of that manual shows what the switch looks like and how to adjust it. Page 53 is an exploded view of things.
    thanks Richard! I have the older version - the LX, but it seems most if not all of it is the same. I hope the pressure switch hasn't migrated... Gonna pull it apart tomorrow (before watching MotoGP from Indianapolis!!)
    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  7. Back To Top    #7

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Re: Jandy ain't dandy...

    more pics of my overall setup. sorry for the blurriness -- the spiders made me jumpy.





    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  8. Back To Top    #8

    In the Industry

    ps0303's Avatar
    Join Date
    Jul 2011
    Location
    FL
    Posts
    3,436

    Re: Jandy ain't dandy...

    If you are doing regular maintenance on the filter and keeping it clean, it's probably the pressure switch. Like Richard320 said, you can jump it out and if the heater works, then it's the switch or water flow. Once you verify water isn't the issue, then the switch becomes the suspect.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

  9. Back To Top    #9

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Re: Jandy ain't dandy...

    Quote Originally Posted by ps0303 View Post
    If you are doing regular maintenance on the filter and keeping it clean, it's probably the pressure switch. Like Richard320 said, you can jump it out and if the heater works, then it's the switch or water flow. Once you verify water isn't the issue, then the switch becomes the suspect.
    Got it - but how would one know if in fact it's the water flow itself? I mean - is there a separate way to test that? It only takes a couple psi to shove the plunger in the switch so it makes contact and opens the circuit, right? So am i right in that pretty much any positive flow should kick it open? I can see LOTS of pressure flowing into the pool-- the pool sweeper flies around like it always has when all pressure is directed that way, and on spa setting, there is a lot of active circulation and flow. There is also none of the telltale air-gapping (sounds of whack/bang) from the heater core or piping that one gets if water flow is low and the pump is sucking/pumping air. What gauge wire do you recommend for the jump? I don't know how many amps are travelling along that line...
    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  10. Back To Top    #10

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Re: Jandy ain't dandy...

    this seems like the right schematic... yes? Jandy Laars LX/LT Heater Parts
    Last edited by alacrity; 08-09-2015 at 01:59 PM. Reason: corrected link
    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  11. Back To Top    #11

    In the Industry

    ps0303's Avatar
    Join Date
    Jul 2011
    Location
    FL
    Posts
    3,436

    Re: Jandy ain't dandy...

    Nothing special on the gauge of wire for jumping out the switch.

    I usually test the pressure by placing my hand on one of the pool inlets and if it's strong enough to push my hand away, enough pressure is there. If I can hold my hand over the inlet with little effort, probably not enough water pressure.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

  12. Back To Top    #12
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Jandy ain't dandy...

    My reading of the adjustment procedure on that switch was that it looks for some kind of differential pressure - about 2 psi.
    The pressure switch is preset at the factory for activation
    at 2 psi (14 kPa). Do not adjust the pressure switch if
    the heater is installed more than 15 feet (4.57 m) below
    the pool surface. Consult your local Jandy Pro Series
    representative for recommendations.
    BYPASS
    ADJUSTMENT
    SCREW
    THERMOMETER WITH
    PETE’S PLUGŪ
    Figure 34. Temperature Rise Measurement
    On some installations, the piping from the heater to the
    pool is very short. The back pressure could be too low
    to trigger the pressure switch. If this happens, it may be
    necessary to install a directional fitting or elbows where
    the return line enters the pool. This will increase back
    pressure enough for the heater to operate properly.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  13. Back To Top    #13

    Join Date
    Aug 2015
    Location
    Los Angeles, california
    Posts
    17

    Re: Jandy ain't dandy...

    Quote Originally Posted by ps0303 View Post
    Nothing special on the gauge of wire for jumping out the switch.

    I usually test the pressure by placing my hand on one of the pool inlets and if it's strong enough to push my hand away, enough pressure is there. If I can hold my hand over the inlet with little effort, probably not enough water pressure.
    There is PLENTY of pressure by this test. thanks.

    - - - Updated - - -

    Richard: I saw that in the service manual you posted...

    I also found what appears to be the right manual for this particular (older) LX heater here

    https://www.google.com/url?sa=t&rct=...99804247,d.cGU


    What I would love to find (but haven't yet) is a couple pix or a video showing the easy way to remove the panels to get to the pressure switch. I have the lower front cover off -as you see in the pix. Given the spiders etc (I know I sound like a weenie - but these black widows are not to be trifled with)... I don't wanna be reaching up inside under the top front cover. Does the whole top come off?
    28x14' in ground pool -@15k gallons - max 6' depth. Motorized vinyl pool cover. Jandy LX1 (laars) gas heater. Century/Jandy jhpu2.0-2 pump. Jandy CL580 filter runs 15-20psi usually. there's a secondary 1.0 pump for the water feature that has it's own circuit. We have automated Jandy system.

  14. Back To Top    #14
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Jandy ain't dandy...

    Haven't got a clue.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  15. Back To Top    #15
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Jandy ain't dandy...

    What do you mean the filter pressure is 10-20psi? That is a huge range. We recommend backwashing when the pressure rises 20-25% or the flow drops too much. If you have a clean pressure of 10 psi, then there will be virtually no flow by 20psi.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  16. Back To Top    #16

    In the Industry
    Qwaxalot's Avatar
    Join Date
    Jun 2012
    Posts
    439

    Re: Jandy ain't dandy...

    Quote Originally Posted by alacrity View Post
    this seems like the right schematic... yes? Jandy Laars LX/LT Heater Parts
    Pressure switch is behind the upper front panel (#59 in the parts breakdown). It's secured by screws running vertically from the bottom of the panel. Remove the screws and the panel slides down.
    In the industry, CSP (Certified Service Professional) by the NSPI and it's successor the APSP. My company services over 600 pools every year. I think the practices regularly espoused on this forum (especially the BBB method) are outstanding; however my comments will be often oriented towards the goal of getting it done, and getting it done right now!

  17. Back To Top    #17

    In the Industry
    Qwaxalot's Avatar
    Join Date
    Jun 2012
    Posts
    439

    Re: Jandy ain't dandy...

    One more comment. This unit displays the pressure switch error when (in remote operation) there is no call for heat. That is, the Aqualink thinks it's set temperature has been reached (a more complete explanation is in the Jandy manual).
    In the industry, CSP (Certified Service Professional) by the NSPI and it's successor the APSP. My company services over 600 pools every year. I think the practices regularly espoused on this forum (especially the BBB method) are outstanding; however my comments will be often oriented towards the goal of getting it done, and getting it done right now!

  18. Back To Top    #18

    Join Date
    Aug 2015
    Location
    Plano, TX
    Posts
    212

    Re: Jandy ain't dandy...

    Just to cover the obvious things...Are you sure the "low pressure" is in reference to the water and not the gas?
    Curtis- 20k gallon IG gunnite/plaster with hot tub/waterfall and "grotto"
    All Jandy equipment: 60sqft DE filter - 399k btu natural gas heater - Stealth pumps - iAquaLink RS8.
    Polaris 9400 on patrol.
    TF-100 in da house/TFP method in effect: FC=4-6, pH=7.5, TA=80, CH=250, CYA=50, Borate=50, CSI=-0.21

  19. Back To Top    #19

    In the Industry

    ps0303's Avatar
    Join Date
    Jul 2011
    Location
    FL
    Posts
    3,436

    Re: Jandy ain't dandy...

    Pool heaters have no way of knowing about gas or pressure.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

  20. Back To Top    #20

    Join Date
    Aug 2015
    Location
    Plano, TX
    Posts
    212

    Re: Jandy ain't dandy...

    You see in the pic the sticker that says '3.0" WC'? That refers to the minimum gas pressure required going into the unit while the inlet valve is open. That refers to 3 inches of water column which is a measurement of pressure. Three inches of water column is equivalent to 0.108 PSI. The regulator coming off the gas meter that supplies your house should be a 0.25 PSI regulator which is the standard for all residential appliances that use natural gas. This being said, you should have 0.25psi before inlet valve with valve closed. When valve opens, you should have at absolute minimum 0.108psi. Anything less than that, your heater will shut down due to low gas pressure. Just a note about something related, if your flame is burning on low pressure, it will create more soot than usual which will build up on your flame sensor causing it to fail prematurely.
    Curtis- 20k gallon IG gunnite/plaster with hot tub/waterfall and "grotto"
    All Jandy equipment: 60sqft DE filter - 399k btu natural gas heater - Stealth pumps - iAquaLink RS8.
    Polaris 9400 on patrol.
    TF-100 in da house/TFP method in effect: FC=4-6, pH=7.5, TA=80, CH=250, CYA=50, Borate=50, CSI=-0.21

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •