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Type: Posts; User: derekkite

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  1. Another thing that gets fussy on hoshizaki units...

    Another thing that gets fussy on hoshizaki units is the harvest termination. Harvest is triggered by water level, the float gizmo you see on the front of the evaporator. It is terminated by a...
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    470

    I think the manufacturer's documents should say....

    I think the manufacturer's documents should say. 200-225 psi.
  3. I got here late, but I'd check the fan delay. It...

    I got here late, but I'd check the fan delay. It should freeze the coil real cold before bringing the fan on. It will cycle a number of times before the box pulls down.

    There isn't enough hp to...
  4. Thread: Work boots!

    by derekkite
    Replies
    122
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    17,870

    I've been wearing Timberland Pro. Have trouble...

    I've been wearing Timberland Pro. Have trouble getting a year out of them though. They fit my feet however.
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    833

    HP80 and MP39 replacements

    We've used MP39 since the R-12 phaseout, same with HP80. Both work very well, with any oil in short coupled applications. 134A has been nothing but a nuisance with it's low capacity, and my habit has...
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    48
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    5,553

    I detest my Dtek :) Seriously I have yet to...

    I detest my Dtek :) Seriously I have yet to locate a leak with it. The best I can find is that there is a leak somewhere, in the cabinet as opposed to out. But actually finding it? Nope.

    I find...
  7. Last name actually. Where are you in BC?

    Last name actually. Where are you in BC?
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    19
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    1,928

    Remember head pressure equals condensing...

    Remember head pressure equals condensing temperature. The compressor adds energy to the refrigerant vapor. The temperature will rise to the point where the gas will condense. That temperature is a...
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    53
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    7,053

    Learn the refrigeration cycle. You are working on...

    Learn the refrigeration cycle. You are working on something interesting, a VRF system. What do all the valves and chambers in that box do? Figure it out. Learn the PE graphs, pressure enthalpy, it...
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    9
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    1,300

    Reach in coolers and open refrigerated display...

    Reach in coolers and open refrigerated display cases are often controlled like that. They work fine, you just set them lower than for the return. If something goes wrong, like your compressor gets...
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    6,234

    Cases icing up usually means loss of...

    Cases icing up usually means loss of refrigeration capacity. Even with scheduled defrosts, an air defrost needs to be off 4-6 hours in a day to keep clear. Check your charge, tx valve, clean...
  12. I ran into this last week. These are the...

    I ran into this last week. These are the mechanical clocks with the small rockers around the outside of the dial. I had one defrost that wouldn't terminate, the rest were fine. Must be part of the...
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    11
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    1,519

    I've run into a couple air driers where the...

    I've run into a couple air driers where the refrigerant leak on the evaporator introduced air into the system. The air pressure is higher than the refrigerant pressure.

    That will give you very odd...
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    3,003

    What do I do? I look in the cooled space. Are the...

    What do I do? I look in the cooled space. Are the fans working, are they hot? Is the coil plugged? Is it iced up? Then look at the condensing unit. Is it plugged? Fans running, hot? Is the compressor...
  15. Thread: Mechanic

    by derekkite
    Replies
    3
    Views
    897

    Mechanic

    Been doing refrigeration and air conditioning service and installation since the late 80's. Have my canadian trade certification. We are in a small town so we do almost everything from chillers,...
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