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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...
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    1,223

    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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    778

    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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    1,284

    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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    941

    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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    916

    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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    767

    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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    916

    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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    916

    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...
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    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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    2,871

    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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    1,068

    does it have a TXV or pulse valve?

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

    by skotup
    Replies
    6
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    693

    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
    9
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    860

    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
    25
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    1,795

    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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    26
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    2,253

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

    .....so how would you fix that?
  20. Replies
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    1,547

    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
    25
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    1,795

    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
    26
    Views
    2,253

    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
    25
    Views
    1,795

    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...
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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
    Views
    1,795

    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...
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