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Type: Posts; User: skotup

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  1. Replies
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    if they are all the same size, you can use what...

    if they are all the same size, you can use what ever kw/hp rating you want, as long as they are all the same. The rating is only used so the controller knows what capacity percent turning the comp on...
  2. Refrigeration/havac controll industrie is a joke!

    Im a sparky, specialised in supermarket refrigeration. I have worked on industrial PLC's and telecommunications in the the past. PLC's and telecoms have what they call an I.S. system , integrialy...
  3. Replies
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    1,226

    im a refrig sparky, i install lights in cool...

    im a refrig sparky, i install lights in cool rooms and freezer rooms. The important principal to understand is that when air is cooled, it shrinks. It draws warmer air in from outside the coolroom,...
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    a solid state relay is a triac feeding thyristor...

    a solid state relay is a triac feeding thyristor which is like an electrical current valve. A small current on the A1 opens up the valve and lets a large amount of current trough what ever it is you...
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    1,309

    refrigerators and freezers can over run and...

    refrigerators and freezers can over run and rupture in a massive explosion destroying an entire city block killing 1000's of people. I hope you know what you are doing if you're gonna be working with...
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    If it is a MPR15, they are just big capacitors,...

    If it is a MPR15, they are just big capacitors, notice the size and weight ot it.

    neways if it is a MPR15: if voltage it applied to terminal 5 (fault condition) it charges the capacitor and drops...
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    here's the pic. the line with the loop in it...

    here's the pic.

    the line with the loop in it is the one i was talking about. The flow of the solenoid on the line is towards the seperator. And there IS infact liquid pumps on the rack. The line...
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    I hope the reason you want nylon rod isnt because...

    I hope the reason you want nylon rod isnt because there is an earth leak and you want to isolate it from earth. Isolate it from your pipes by all means but you must still earth it with the earth wire...
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    922

    I worked on a job where they used the same system...

    I worked on a job where they used the same system and it did have liquid pumps but i didnt know what they were for. So i presume this also has liquid pumps, i'll have a look tomorrow and try to take...
  10. Replies
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    isnt the liquid and discharge at the same...

    isnt the liquid and discharge at the same pressure? how can liquid flow to the discharge? there is no TXV on this line cos it wouldnt do anything anyway, no pressure differential... or is there?
    ...
  11. Replies
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    what does this line do?

    was working on a new'ish supermarket instalation which used a verry different rack and system to what im used to. One of the unusual things i noticed was that there was a small pipe, smaller than a...
  12. Replies
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    1,598

    yer what is that ice and mist you see breaking...

    yer what is that ice and mist you see breaking off the surface of the shuttle when it launches?
  13. Thread: Cap Tube chaser

    by skotup
    Replies
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    2,965

    what is a cap tube chaser? is it a wire you shove...

    what is a cap tube chaser? is it a wire you shove through a capillary tube to un-block it or something?
  14. Replies
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    1,088

    does it have a TXV or pulse valve?

    does it have a TXV or pulse valve?
  15. Thread: Split condenser

    by skotup
    Replies
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    715

    in aus we dont have low ambient temps but we...

    in aus we dont have low ambient temps but we still have split condensors used for heat reclaim. When the mechanical services switch board calls for heating the discharge, through a 3 way valve, is...
  16. Thread: rack txv

    by skotup
    Replies
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    884

    is the suction header boxed in with sheet metal?...

    is the suction header boxed in with sheet metal? if so it sounds to me like a sub cool txv and solenoid. The boxed in section is a heat exchanger.
  17. Replies
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    hair spray uses butane as the propellant, not R22...

    hair spray uses butane as the propellant, not R22 or HydroFlourocarbonsomethings. And C02 does not conduct heat well so global warming is making the weather mild, not hot or cold.
  18. Thread: Iced Up Coffin

    by skotup
    Replies
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    1,880

    cant the drain still be clear due to the drain...

    cant the drain still be clear due to the drain heater even tho the coil has iced up?
  19. Thread: oil failure

    by skotup
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    2,364

    .....so how would you fix that?

    .....so how would you fix that?
  20. Replies
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    ofcourse, lower voltage is obviosly safer, what...

    ofcourse, lower voltage is obviosly safer, what do you mean by a 'leg' never heard that term. When you say 2 120V legs, is that 2 120V phases 180degrees apart from each other? You must have a good...
  21. Thread: Iced Up Coffin

    by skotup
    Replies
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    1,880

    Ah ok, i knew that except that my thinking was...

    Ah ok, i knew that except that my thinking was that if the refrigerant wasnt picking up any heat the tx valve would close preventing any liqiud at all from passing thu, is that what "throttle back"...
  22. Thread: oil failure

    by skotup
    Replies
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    2,364

    Is the sump heater/crank case heater circuit...

    Is the sump heater/crank case heater circuit breaker tripped? if so- reset it. can you get a bigger sump heater? or short the normaly closed sump heater contact on the compressor contactor? change...
  23. Thread: Iced Up Coffin

    by skotup
    Replies
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    1,880

    Not condescending, im proving i am familiar with...

    Not condescending, im proving i am familiar with refrigeration cos i have to, otherwise youde just think im just some random pleb sparky that doesnt know nitrogen from amomia.

    So neways you didnt...
  24. Replies
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    Black is neutral, NEUTRAL-NEUTRAL-NEUTRAL!!!! ...

    Black is neutral, NEUTRAL-NEUTRAL-NEUTRAL!!!!

    Where do you have 120V? i thought the international standard was 230V, 50hz except stubborn america with poor quality, non-durable paper money instead...
  25. Thread: Iced Up Coffin

    by skotup
    Replies
    25
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    1,880

    I didnt get that 1st part about sending liquid to...

    I didnt get that 1st part about sending liquid to the compressor, i know thats a bad thing cos u get liquid slugging in the compressor and catastophic failure, something has to give... but what would...
  26. Thread: Iced Up Coffin

    by skotup
    Replies
    25
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    1,880

    Most customers I deal with aren't going to unload...

    Most customers I deal with aren't going to unload a case and leave it sit empty only to overload their walk-in and lose product sales from the refrigerated display all day in order to pay me OT to...
  27. Thread: Iced Up Coffin

    by skotup
    Replies
    25
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    1,880

    most de-icing that ive seen has taken place after...

    most de-icing that ive seen has taken place after hours with the cases unloaded. I dont think it would take 8 hours but i can see how hot water would be alot quicker. De-icing during trading hours...
  28. Thread: Iced Up Coffin

    by skotup
    Replies
    25
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    1,880

    I dont understand why you frigy's dont just force...

    I dont understand why you frigy's dont just force the defrost heaters on and sit back and wait. Why do you go to the trouble of setting up a hose or carrying buckets?
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    yer thought it might be the case that they just...

    yer thought it might be the case that they just come as standard. Ive left them in circuit in the past any ways. But using them as defrost termination aswell certainly makes sence too.
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    OMG you use black active and red neutrals? what...

    OMG you use black active and red neutrals? what are your 3phase colors? we have red-white-blue as U,V,W phases.
  31. Replies
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    1,184

    Question; klixon switch and fan delay probe

    This is a question thats been buggin me for a while so what better place to ask it...

    On a danfoss controlled system the fans on a freezer evap are delayed mechanically/electrically by the klixon,...
  32. Replies
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    Oh is THAT all it is? danfoss has the same thing...

    Oh is THAT all it is? danfoss has the same thing only its called a fan delay probe which bring me to another question, gonna make a new post tho.
  33. Replies
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    Sparky's power up lights,motors, all sorts of...

    Sparky's power up lights,motors, all sorts of stuff that requires more burning of fossil feuls contributing to global warming, making the world come to an end which kills every one.

    Also people...
  34. Replies
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    I have seen a hot water defrost on an industrial...

    I have seen a hot water defrost on an industrial instalation where amonia was used. When Defrost began soleniods on the hot water pipes opened up and water pumps started up. It was a chicken...
  35. the cheapest way would be to go to a service...

    the cheapest way would be to go to a service station where they sell bags of ice. Hook up the ice trailor to your car at 2am and drive off with no number plates and head lights off.
  36. Replies
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    Its not hot gas defrost, its electric heaters all...

    Its not hot gas defrost, its electric heaters all programed to defrost at seperate times from one another.
  37. Replies
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    1,598

    sun screen needs to be subsidised by the...

    sun screen needs to be subsidised by the refrigeration industry and public liability law suits filed.

    How many deaths thru skin cancer have you caused? how many lives per kilo of refrigerant...
  38. sounds like an old refrigerator with 3 inches of...

    sounds like an old refrigerator with 3 inches of insulation. The freezer rooms i work on have 150mm thich insulation which is 6 inches. A room with only 3 inches as a freezer would put a large...
  39. Replies
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    complaint to those bloody frigy's!!

    I live in australia which is close to the hole in the ozone layer. I was in the sun (summer here) for 3 hours and got painfuly sun burnt. The blame rests 100% on you frigy's and your CFC's! Thats 2...
  40. Replies
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    Its a sub-contract to the refrigeration company....

    Its a sub-contract to the refrigeration company. New supermarket with an unusaul controll system thats not often used called carrel. Besides i reckon i could do nearly all the frigy work, i can...
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    might have to dumb it down for me, im just a...

    might have to dumb it down for me, im just a stupid sparky but im verry interested in it.

    if the discharge doesnt go to the condensor, then where does it go? whats the head pressure valve?

    and...
  42. Replies
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    18,131

    dual trade refrig ppl all seem to do just sparky...

    dual trade refrig ppl all seem to do just sparky work, there's not many of them because it would take you 7 years to do both apprenticeships and there is no dual trade work available due to sparky's...
  43. Thread: Why is this?

    by skotup
    Replies
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    1,235

    on a refurbishment of a supermarket where the...

    on a refurbishment of a supermarket where the back dock was left open for the workers to load/unload gear a cat got into the fruit/veg section and deli section. It tore into meats and ended up...
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    Im a sparky specialising in refrigeration, i'll...

    Im a sparky specialising in refrigeration, i'll try to answer you...
    Yes only one "drop leg" ,although ive never heard that term, from the condensor unless the discharge is used for heating...
  45. Replies
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    6,062

    what does 'flood the condensor' mean? i thought...

    what does 'flood the condensor' mean? i thought gas went to the condenser, or do you mean that it over condenses?
  46. Replies
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    in west australia refrig mechanics can make $35...

    in west australia refrig mechanics can make $35 an hour and refrig sparky's $30/hr. thats in the supermarket business
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    defrost termination question from a sparky

    im working on a new job where a defrost termination is to be used. I understand it is used to terminate the defrost cycle once about 50degreesC is reached? correct me if im wrong.

    I remember from...
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