• 2 Posts
  • 59 Comments
Joined 1 year ago
cake
Cake day: December 4th, 2024

help-circle


  • HVAC-R tech here.

    Not sure what you mean about simulating high temps on the thermostat. If you want to trick the thermostat into seeing a higher temp than it is actually at then you would need to find the temp sensor on the thermostat (usually a thermistor) and replace it with something where you can manually control the input like a potentiometer if there was a thermistor there.

    If you’re talking about simulating calls from your thermostat to your hvac system, then you can usually do that with just some jumper wires if your hvac system has a built in transformer (almost all new systems do). You just remove the thermostat and jumper the hot wire (R or Rc) to whatever call you want to make.

    Edit: I should probably note that if you accidentally jumper anything to ground or to common then you will likely trip the breaker or blow the fuse on your systems transformer. If you do that then you’ll need to find that transformer (usually in the airhandler, assuming a standard residential split system) and reset the breaker or replace that fuse before your system will work again.














  • Exactly, loving your job doesn’t prevent burnout. No matter how much you love it, if you are doing actual work (not some exec shitposting on linkedin all day) then past a certain point your body/mind will just get too tired to function well.

    I genuinely love my job. I would do it for free if I could afford to. I sometimes (especially lately) work well over 60 hours a week. But I need to be careful about how much OT I let myself put in because I will burn out. I know that when I push myself too hard I will eventually start fucking up. I will start missing obvious things. I will start making stupid mistakes. With my job I am also far more likely to seriously injure myself when burned out. Allowing myself to become burned out results in worse outcomes for the customers and costs my company more money. Not to mention that if I did injure myself badly enough to be out of work then all those extra hours I put in would be outweighed be the time I miss.

    A good manager recognizes that a burned out employee does more harm than good and works to prevent it. A good manager knows that keeping their employees happy, well rested, and fulfilled is in the company’s best interest. Sometimes demands pop up that will require a bit of burn out to deal with but the benefit of meeting those demands needs to be weighed against the harm of that burnout. Shitty managers always severely underestimate the harm burnout causes not just to their employees but also to the company.





  • They use adiabatic coolers to minimize electrical cost for cooling and maximize cooling capacity. The water isn’t directly used as the cooling fluid. It’s just used to provide evaporative cooling to boost the efficiency of a conventional refrigeration system. I also suspect that many of them are starting to switch to CO2 based refrigeration systems which heavily benefit from adiabatic gas coolers due to the low critical temp of CO2. Without an adiabatic cooler the efficiency of a CO2 based system starts dropping heavily when the ambient temp gets much above 80F.

    They could acheive the same results without using water, however their refrigeration systems would need larger gas coolers which would increase their electricity usage.