Search results

  1. Fitter30

    Is it possible to adjust hysteresis (or PID) of the blower motor on Navien NPE-240?

    Only factory service might be able to change the whole burner operation. Ran some numbers 60° cold, 120° hot 105° mixed, 1.6 gpm total, .4 gpm 25% cold , 1.2gpm hot ,75% hot. By throttling hot water down to 1.2 gpm might help or playing with the wh setpoint maybe raise or lower it by 2° at a...
  2. Fitter30

    Citric acid passivation for ss tankless?

    Your only treating waterside. Burner can be 3500°+. The hx water is moving fast. I've seen hx twisted like a pretzel in a copper fin hx from low flow , scaled or flow switch isn't fast enough. Passivation burner side isn't touched. Plate and frame both sides can be treated or shell and tube. Hx...
  3. Fitter30

    Tankless Challenges

    Tank 1 stage reg should be set at 10 lbs. Second stage at house 11". Did you see the on the conversion manual last page has burner side lp pressure.
  4. Fitter30

    Outdoor Fire Pit Gas Psi Noise - need help pls

    Have a regulator before the burner? Btu rating of burner?
  5. Fitter30

    Leak at T & P: pressure tank or T & P, how to diagnose?

    Need a gauge that will attach to either to a outdoor hose bib or at the clothes washer valve to measure the water pressure. They open at 150 psi or 210°. They might start dripping at 140 lbs...
  6. Fitter30

    Heating and Cooling 120sqft building

    Motel unit called a PTAC through the wall. Comes in straight cooling, heat pump or with electric heat. Window ac mounted in the wall.
  7. Fitter30

    pump flange compatibility - unions

    If you have the room could just buy the flanges 2- 1.250" screwed ball valves and 2 nipples that's if you need the valves
  8. Fitter30

    TPV drain line

    Run a separate lines outside that pan under the heater if the tpv would let go water would be splashing out of it
  9. Fitter30

    System not maintaining pressure after water runs out in storage tank

    2.31 ' = 1 lb of pressure doesn't matter what size pipe.
  10. Fitter30

    Exploring Slimline Radiators: Seeking Advice

    Slimline radiators not fin tube what temp water? Their all probably very close. What water temp do u what to run. Are u thinking 140° +f or less.Less is a heat pump.
  11. Fitter30

    pump flange compatibility - unions

    No i can't but I've never tried another brand because i can't afford a problem. No different than replacing a pump or a cartridge. Labor cost to much. What advantage would another company have
  12. Fitter30

    Tankless Challenges

    Stop want is the lp pressure incoming? What is is it out? Is this a lp unit?
  13. Fitter30

    System not maintaining pressure after water runs out in storage tank

    What are using to maintain level in the storage tanks.280 gallons of storage how long does it take to refill?
  14. Fitter30

    Citric acid passivation for ss tankless?

    Asking for a combi water heater? I've only seen it done on process equipment. Never seen it done on a plate and frame hx used for condenser, chilled or heated water.
  15. Fitter30

    TPV drain line

    A catch pan for a tp relief devise is like there is no way it's big enough. A devise could fail wide open or at least fail part open.
  16. Fitter30

    Septic 102: need to learn about sewage lift systems

    Have any idea who the builder was? Call them for the plumber company. Your in the process of buying a house and the realtor doesn't know some company sad. The owner doesn't know who to call. I'd be very skeptical. Good home inspector should know. On Facebook post a question on septic systems...
  17. Fitter30

    Septic 102: need to learn about sewage lift systems

    Just Google sewage lift pump system explained. There are two types of pumps sewage and grinder. Grinder pump is probably what u have it handles toilet waste.
  18. Fitter30

    Need help reading Pump Curve for Sewage

    There some good videos on tdh on you tube and how to pick the right sewage pump.
  19. Fitter30

    Navien NPE-240A2 x2 units--please help me configure

    Ask the plumbing company to have the local rep of navian to meet with your plumber at the house. They are plumbers that haven't been trained on the correct installation of two units.
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