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  1. Replies
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    An oil change never hurts but it sounds like an...

    An oil change never hurts but it sounds like an issue with your manifold/hoses. Sometimes you have to resort to the shotgun method of troubleshooting. First, make sure your gaskets/O-rings are in...
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    2wings, just apply for pro membership man. You...

    2wings, just apply for pro membership man. You catch some flak around here sometimes. It's no big deal. Just the internet. The guys in the pro forums know their stuff. Helped me out numerous times....
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    I bought a fluke 902 a few years ago. I think...

    I bought a fluke 902 a few years ago. I think it's a solid meter. The only issue I ran into was that after 2 years of use I noticed the temperature readings were off by about 6 degrees. There's no...
  4. You make a good point there man.

    You make a good point there man.
  5. Ha! I carry around one of those faucet to garden...

    Ha! I carry around one of those faucet to garden hose adapters in the hopes of getting a hot water supply in freeze up situations. Still can't seem to keep from making a mess though. The last ice...
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    If it were me, I'd install the liquid line...

    If it were me, I'd install the liquid line solenoid. It's just better for the longevity of the system, as others have pointed out. This will also save you from pulling wire to the condensing unit at...
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    Last time I was on call I get woken up by the...

    Last time I was on call I get woken up by the service informing me that one of our store's Walk-in freezers are down. Call the store, temping at 30*. Have her walk inside the box, fans are not...
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    I was talking about purging with nitrogen while...

    I was talking about purging with nitrogen while you are brazing. If you are, be wary about the pressure flowing through the system potentially making the system have a higher pressure than...
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    3,875

    Dipping your rag in the bucket then wringing it...

    Dipping your rag in the bucket then wringing it out over the fitting would be the only way you are going to introduce moisture to the system, barring a thunderstorm. Focus on the melting point of the...
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    I'm curious about what prompted the other tech to...

    I'm curious about what prompted the other tech to change the TXV in the first place? What symptom made him reach that conclusion? It seems that the decision to change the power head and not the valve...
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    This....X2....He knows what he's talking about.

    This....X2....He knows what he's talking about.
  12. Replies
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    3,875

    Cool gel works really well. Self contained...

    Cool gel works really well. Self contained equipment is always tight. Without cool gel it usually seems to end up smelling like a tire fire.
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    You could try a rosebud tip. I use mine quite a...

    You could try a rosebud tip. I use mine quite a bit. If your brazing rod is sticking then you aren't running your torch hot enough. Like Jason12000 said, the flame will turn green when the copper is...
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    Single phase thermal OL will open S and R to C....

    Single phase thermal OL will open S and R to C. Three phase will open all three windings. A few years ago I responded to a follow up call to replace a compressor which was condemned by another tech....
  15. Anytime a variable speed blower motor fails, the...

    Anytime a variable speed blower motor fails, the customer, when given the option, will opt to replace it with a conventional blower motor. The cost, with the additional contactor, pales in comparison...
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    Question Answer I think you may...

    Question



    Answer




    I think you may be confusing capacity with efficiency. When a unit is brand spanking new, you should expect capacity to be as advertised by the manufacturer (assuming...
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    What "Beenthere" was correcting me on was the...

    What "Beenthere" was correcting me on was the system capacity; the systems ability to absorb heat from the occupied space and reject it to the outside space. Assuming we are talking about a system...
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    You are correct. 95 degrees is the maximum design...

    You are correct. 95 degrees is the maximum design condition. Condensers operate more efficiently below the maximum design conditions. Although, theoretically, capacity should not change until you...
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    ....In the northeast all units, regardless of...

    ....In the northeast all units, regardless of refrigerant, have a capacity loss at 95 degree outdoor ambient.
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    It rarely reaches 95 degrees around here. But I'm...

    It rarely reaches 95 degrees around here. But I'm curious about this capacity loss. We have been swapping out R22 units with R422D. Both comfort cooling and medium temp refrigeration. I have noticed...
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    Regarding condenser split, it will vary,...

    Regarding condenser split, it will vary, slightly, based on ambient temp and evap load. A 12 seer unit should have an approximate 20 degree condenser split. As others have stated, mid to low teens is...
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    A bad condenser? Need a little more information....

    A bad condenser? Need a little more information. What is the Delta T across the evaporator? Suction pressure? Superheat? Head pressure? Was the system previously able to keep the occupied space below...
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    After reading your posts, I agree, It does seem...

    After reading your posts, I agree, It does seem counter intuitive to think that non-condensible gases would increase subcooling. I've never run into a unit with that problem so this is all a thought...
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    How much is that really going to change the...

    How much is that really going to change the direction of the country? I don't mean to sound cynical, but do you REALLY think that Obamacare would be repealed or that the fiscal policies are really...
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    I transitioned to commercial refrigeration after...

    I transitioned to commercial refrigeration after years of strictly HVAC work, resi and light commercial. The stress level is definitely higher when you have a customer with a fully stocked walk in...
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