Heat Pumps: Approach, Temperature Rise and Proper Winter Charging

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  • Опубликовано: 24 дек 2024

Комментарии • 19

  • @armandorodriguez6447
    @armandorodriguez6447 4 месяца назад +1

    Damn good tip.3 decades and now i come across this issue

  • @maylockin
    @maylockin 15 дней назад +1

    You made this video Jan of 2022, but do you remember if the compressor was a single stage, two stage, or an inverter? I am currently starting up a 24,000 btu comfort aire inverter heat pump. Vacuum below 500 microns broke the vacuum with about 4 oz of R410A, and have not added any additional refregerant. Just been running it and watching the numbers.. My approuch is 11 degrees..The seven segment display on the HP circuit board in charge mode shows high subcooling 56 degrees it calls for 36 degrees in heat mode. All the other numbers look ok. Furnace blower on high. There seems to be alot of control going on with a inverter heat pump. The delta T accross the indoor coil 16 to 20 degrees.

    • @timdestasiohvac
      @timdestasiohvac  14 дней назад

      2 stage

    • @gregclark1656
      @gregclark1656 7 дней назад

      Variable capacity systems can be tricky. There's a number of things I could ask. Let's start with the simple, how long is the line set, is the line set the correct size. Is this being tested in charge mode. I am not familiar with this brand, but most are communicating and charge mode is handled at the thermostat, however there are some that can use a conventional stat, and you have to move a jumper wire outdoors to put it in charge mode. Some brands will say they are in high cooling on the led, but there are levels within the stages listed on the LED, and the only way to be certain you are ramped all the way up is to be in charge mode (I'm looking at you Lennox EL18XPC). Also, if it's a conventional stat, with a charge mode jumper, you need to make sure the indoor fan is in high/second stage. There are a lot more questions to ask, and while this is a fantastic video, and a lot of techs don't look at, or consider approach, I would start with all of the appropriate install questions first. Proper line set size, length, proper duct size, airflow set right, and then the appropriate charging methods followed on a variable capacity piece of equipment, per the manufacturers instructions. You definitely do not want to overcharge this type of equipment, better to be slightly low, than over.

    • @gregclark1656
      @gregclark1656 7 дней назад +1

      Now that I am looking into this further, this is a lennox EL18XPV in comfort aire clothing. Charge mode is definitely a jumper on the outdoor unit. I am not saying this is the problem you are having, but I have seen a lot of these overcharged.

  • @michaelmaclachlan2152
    @michaelmaclachlan2152 Год назад +3

    Great tip on the probe placement.
    I'm a second year tech in Washington State, looking to get some good tips on heat pump maintenance and troubleshooting.

  • @StraightupheatingandCoolingLLC
    @StraightupheatingandCoolingLLC 11 дней назад +1

    How many line clamps do it take to complete this procedure?

  • @timdestasiohvac
    @timdestasiohvac  7 дней назад

    ​@gregclark1656 this was a York 2 stage I'm prety sure. I agree with you that verifying airflow is important. I did that with a static pressure test. This video is sevedal years old.

  • @interwoven222
    @interwoven222 Год назад +1

    Would all of this hold true (like the approach temperature) on a package unit?

    • @timdestasiohvac
      @timdestasiohvac  Год назад

      Yes, it would. Just pick up the liquid temperature as close to the "indoor" coil as possible.

  • @numbnut257
    @numbnut257 2 года назад +1

    I bet if you go back in the summer it will show that it is under performing again. I would suspect poor ductwork causing the problem. Thanks for sharing I did learn about winter approach

    • @timdestasiohvac
      @timdestasiohvac  2 года назад +1

      Static pressure was normal and this summer, the unit was performing well. Thanks for watching!

  • @qnzkrew
    @qnzkrew 2 года назад +1

    I have a 2 ton heat pump and everything seems to be working fine but the liquid line temp is about 30 degrees warmer than the return air instead of the 3-17 degrees. Does this mean there is an issue

    • @timdestasio3367
      @timdestasio3367 2 года назад

      No, not necessarily. If the indoor airflow is a little low, it won’t reject as much heat so your liquid temp will be higher. Or if it is not very cold outside there will be more heat in the indoor coil. Since the making of this video, I’ve seen quite a few units running 25-30 degree approach on a mild winter day in the 50’s or 60’s. If you’re running 25-30 approach on a 25 degree day, definitely check your airflow.

  • @hvac-r977
    @hvac-r977 Год назад +1

    It’s so funny that you have the job link probes, but you still use the old manifold 😂

    • @timdestasiohvac
      @timdestasiohvac  Год назад

      I break out the manifold to move gas. All other times its just the probes.

  • @waltherherrera67
    @waltherherrera67 11 месяцев назад

    Excelente investigación

  • @heatingairservices8708
    @heatingairservices8708 10 месяцев назад +1

    yes when one chargers an unit ..don't rush as I seem to do to many times ... but Charge her Slow or you be Backing it out in recovery in 20 30 mins & all that waist goes to recycle not uR wallet don't waist Hi dollar Juice & we can not leave an 1- 3 * Super-heat its happens .