Pump Start Relay Question

Discussion in 'Irrigation' started by jvanvliet, Feb 20, 2012.

  1. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,862

    as far as i know you have a single controller and not multiples, why do you need an ice cube? the PSR should should stand alone shouldn't it?

    the ice cube should be installed as an isolation between multiple controllers if i am not mistaken.
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,485

    Isn't a big contactor with a 7.5 HP rating likely to have a coil that draws too much current for a master valve output?
     
  3. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,862

    a psr simply closes the circuit, if you have 24vac output you should be golden
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,485

    PSR coils routinely outdraw irrigation controllers today - they aren't designed for weenie controller circuits that have 20VA supply transformers.
     
  5. stebs

    stebs LawnSite Senior Member
    Posts: 358

    The other possibility is that you have bad contacts in the ice cube causing the relay to "chatter" when the controller is energizing the ice cube, which would cause the pump to draw more, or, the coil on the relay is drawing more since it is constantly pulling in and releasing....

    Just a thought...
     
  6. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,862

    i don't understand the use of the cube

    below is a copy of the hunter psr specs

    Pump Start Relay Model Chart
    MODELS DESCRIPTION
    PRS-22 Double pole/single throw pump start relay for 120 VAC pumps up to 2HP or 240VAC pumps up to 5HP

    PRS-52 Double pole/single throw pump start relay for 120 VAC pumps up to 5HP or 240VAC pumps up to 7.5HP

    PRS-53 Double pole/single throw pump start relay for 120 VAC pumps up to 5HP, 240VAC pumps up to 7.5HP, or 240VAC pumps up to 10HP (three phase)
    PSRB Used to boost controller output power available to operate larger pump start relays if necessary

    we're not getting all the info morris, i'll be back in a few days :waving:
     
  7. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,862

    oh yea....

    psr2.jpg
     
  8. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,485

    I think the TECO relay was already in place (or maybe not) - but you aren't including the VA requirement of the relay coils, and that is key - no way the old Hunter SRC controller could feed any 24VAC relay it might encounter.
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,612

    Sure be nice if one of you "pros" would explain why an "ice cube" was used in a single clock situation. Pump start relays can be wired any which way (115/240), so I don't understand this whole deal, but, it is Florida. :dizzy:
     
  10. Sprinkus

    Sprinkus LawnSite Silver Member
    Posts: 2,048

    Could be that the controller controls the ice cube with 24 vac and the ice cube controls the pump start with 110 vac, if the PSR coil is a 110 coil.
    Most of the larger PSR's I deal with use 110 coils.
     

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