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    Ok, there can't be any leaks because the system...

    Ok, there can't be any leaks because the system held nitrogen over the weekend.
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    Help with Micron gauge

    I bought a CPS VG200 Micron gauge and used it for the first time today. I am using a brand new set of yellow jacket gauges to pull a vacuum (hoses aren't vacuum rated). I can't get a reading unless...
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    Mitsubishi MHK1 wireless thermostat

    I was trying to connect a Mitsubishi MHK1 wireless thermostat to the receiver last night and the thermostat seemed to be unable to connect to a receiver. There's 3 units (2 of which were successfully...
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    Oh ok so I'm sure you know everything then.

    Oh ok so I'm sure you know everything then.
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    The pumps are slightly below the first floor in...

    The pumps are slightly below the first floor in the boiler room. Building is 2 stories. Pump is on a VFD but runs at 60 hz. Pressure is 30 lbs....system is all PVC.
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    The problem we're having is that there doesn't...

    The problem we're having is that there doesn't seem to be a pressure differential in some places and the water is not flowing from supply to return through the unit. Sometimes if there is a...
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    They are not insulated so I can definitely say...

    They are not insulated so I can definitely say they are different sizes. One is probably 1" and the other is like 2". I would think the smaller would be supply so that it stays pressurized around...
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    Condenser water loop systems

    My company has a contract with a 200,000 square foot office building that has a condenser water loop that feeds 270 water source heat pumps on the perimeter. My question is this; there are two pipes...
  9. Emailed local 30 they said there probably won't...

    Emailed local 30 they said there probably won't be an apprenticeship recruitment this year. 2 year wait list
  10. Been looking for about a year

    Been looking for about a year
  11. I've also been trying to get my foot in the door...

    I've also been trying to get my foot in the door but have had no luck. Everyone seems to be looking to hire people who are already in the union.
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    There's actually three pumps. Two 50 hp which...

    There's actually three pumps. Two 50 hp which were designed to run just the condenser water for the chillers but now run the whole loop. Only one runs at a time. There is a third pump that was...
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    Yes, condenser water is pumped by this pump as...

    Yes, condenser water is pumped by this pump as well as the water for the heat pumps. There's 270 something heat pumps in the building.
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    The pump runs at 50 hz 24/7. There is also 5 60...

    The pump runs at 50 hz 24/7. There is also 5 60 ton chillers run on the same water. Strainers are at the pump and are clean.
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    I'm wondering if the check valve at the pump is...

    I'm wondering if the check valve at the pump is bad? There's no other valves besides manual loop isolation valves that are all open.
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    No I haven't seen any valve like that. It's a...

    No I haven't seen any valve like that. It's a very simple system but I'm assuming that there has to be a pressure differential so that the return water doesn't reverse the flow?
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    We've swapped hoses numerous times

    We've swapped hoses numerous times
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    The pump is on a VFD but it runs at 50 hz all...

    The pump is on a VFD but it runs at 50 hz all day. I can assure you that the return is the return. There's 2 pipes one is larger in diameter (return).
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    We have two pipes that lay on the floor under the...

    We have two pipes that lay on the floor under the unit that go throughout the perimeter of the building. What I've noticed is that there seems to be more pressure behind the return for some reason....
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    We've flushed the unit, flushed the lines ...

    We've flushed the unit, flushed the lines Strainers were cleaned last week.
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    In cooling, the outlet should be hot. All it is...

    In cooling, the outlet should be hot. All it is is a loop that goes around the whole building with a supply and return. Supply has a 1/2 ball valve and so does the return. The problem is that when...
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    Water source heat pump problems

    We have one troublesome water source heat pump in a building that had a condenser water loop. The one spot has an Islandaire water source heat pump that cuts out. The inlet water gets really hot....
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    Are the techs in 638?

    Are the techs in 638?
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    So does anyone know about United? How it is to...

    So does anyone know about United? How it is to work for them?
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    Yes I have. Emcor is pretty big.

    Yes I have. Emcor is pretty big.
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