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  • #76
    Re: Navien tankless heaters

    Had a similar problem with my 6 month old Navien CR180 unit as rme. Intermittant ignition failures for a couple weeks before the unit quit working completely. After much troubleshooting and replacement of the circuit board it was found to be a bad ignitor.

    Now the unit fires up and works well maintaining 120F except for some extreme vibrations at high flows. Pretty much only notice the vibrations during startup of the washing machine and only for roughly 10sec at time, but it is quite loud throughout the house and can't be good for the unit long term. Called tech support again and they had me run through some checks before saying it was fine and that I could put a damper on the wall mounts. Any ideas on what could be causing this and if this unit is actually functioning normally?

    Comment


    • #77
      Re: Navien tankless heaters

      Originally posted by pbjpilot View Post
      Had a similar problem with my 6 month old Navien CR180 unit as rme. Intermittant ignition failures for a couple weeks before the unit quit working completely. After much troubleshooting and replacement of the circuit board it was found to be a bad ignitor.

      Now the unit fires up and works well maintaining 120F except for some extreme vibrations at high flows. Pretty much only notice the vibrations during startup of the washing machine and only for roughly 10sec at time, but it is quite loud throughout the house and can't be good for the unit long term. Called tech support again and they had me run through some checks before saying it was fine and that I could put a damper on the wall mounts. Any ideas on what could be causing this and if this unit is actually functioning normally?
      High water pressure.
      DIRTFT

      Comment


      • #78
        Re: Navien tankless heaters

        I was guessing that it may be high water pressure as we typically have over 100psi here. Would you recommend a pressure reducer installed immediately before the unit? What pressure 50-60psi?
        Thanks

        Comment


        • #79
          Re: Navien tankless heaters

          I have a brand new customer who I am going to bid a whole new house remodel, with all new plbg. He is looking at purchasing Naviene on demand heater for domestic hot water. Sounds like I better bring my sleeping bag over there, from the sounds of all this trouble you guys have.
          These units haven't impressed me yet. Put in a standard water heater, and never look back. No service calls is enough to sell me, whether I'm the contractor or homeowner.
          Don't these people get sick of frequent no hot water problems?

          Comment


          • #80
            Re: Navien tankless heaters

            Originally posted by Swytech View Post
            So I have had some issues with my Navien CC240A. I have a home run system and single presure balanced taps all over the house. I have the unit set to external recirculation on a schedule with the maifold in the recirc loop.

            I live in Edmonton AB and the water temp is 40F in and I am heating it to 125F out. My presure in the house is 60 PSI in.

            Here is my issue. The unit has a flow sensor ( to detemine when to start making hot water, it also has a buffer tank and a constrictor valve that can reduce the flow of water. So the two sides are not 30 PSI and 30 PSI when at 50% mix at the shower. So when every a toliet is flushed or any change in pressure on either side ( hot or cold ) the Navien starts changing the demand of water, as well as the shower valve starts trying to balance the presure. So the result is what I call Water temp feedback. ( just like when you get too close to a speaker and you are holding the mike. The amp would make a loud scream and the blow a fuse ) But in the water world, the Navien starts making hot hot water and then starts to burn the shower victim, then the presure valve starts to flap again and freeze the victim. This goes on for about 30 - 50 seconds until the tap is happy with the flow and the Navien is happy as well. I have come up with a few ideas that may fix it but don't really want to implement the 2nd option because of the energy waste.

            1st option, should I install a pressure balance unit that takes the cold and the hot and makes them the same pressure before the manifold? How will that affect my recirc on the manifold and would it stop the flip flop burn cold crap. (if so I would like a 3/4 unit and am looking for a brand you have used ( manual is okay, electronic would be fine if it reacts faster.

            2st option, place a mixing valve on that hot that mixes the cold and make the pressure the same, while also putting the Navien into Pro mode and heating the water to 145ish. ( gas savings are probably out the window if I do that right?)

            3rd option, say screw it to the taps at the sinks ( because balance is not a important), and install tempature regulated shower valves?

            4th,, ideas are welcome.

            BTW overall I think the technology in the Navien is great, however if they would take the hot in and give you hot and cold out, which both balancing the pressure on both sides, I think they would have an awesome system.

            5th expeimental, Take the wires off the valve that restricks flow, and add 2 wires and then take the cold though the same take of valve ( may not be clear, daisy chain so that the hot valve position is also applied to the cold outside the unit.

            Help!

            Swytech
            Is all this trouble really worth the "so called" fuel savings, over storage tank heaters. Who pays for all these hours spent, repairing manufacturers defects, by their greed, lack of engineering,& get it to end user quickly, way of thinking?

            Comment


            • #81
              Re: Navien tankless heaters

              The first Navien heaters had issues , but they have all been fixed now . I do enjoy the $$$ savings that I receive every month . the unit here cost me 1100 $ , 200 for the gas piping and venting , the government gave me back 900 $ and I'm saving around 30 $ per month ... Why don't you call the Navien specialists and see what they have to offer for solutions ..

              Every house / job / install is different , just like life ...

              Comment


              • #82
                Re: Navien tankless heaters

                Originally posted by Total View Post
                The first Navien heaters had issues , but they have all been fixed now . I do enjoy the $$$ savings that I receive every month . the unit here cost me 1100 $ , 200 for the gas piping and venting , the government gave me back 900 $ and I'm saving around 30 $ per month ... Why don't you call the Navien specialists and see what they have to offer for solutions ..

                Every house / job / install is different , just like life ...
                The new Naviens have issues still. They have the widest temperature swing in the industry, along with many other issues. Till this day I still refuse to install these units anymore.
                Ron Hasil Lic #058-160417
                A-Archer Sewer & Plumbing specializing in:
                Tankless Water Heaters | Drain and Sewer Cleaning
                Sump and Ejector Pumps | Backflow RPZ Testing

                Comment


                • #83
                  Re: Navien tankless heaters

                  Originally posted by SewerRatz View Post
                  The new Naviens have issues still. They have the widest temperature swing in the industry, along with many other issues. Till this day I still refuse to install these units anymore.
                  Weird - sounds like something gone wrong with the installations , maybe they used 1/2 gas line instead of the 3/4 that is required . Mine keep the temp within 1 deg C . Maybe I'm the exception , but around this area I know many installs that don't have the temperature swings .. But that is why we are given choices , install or not to install ..

                  Comment


                  • #84
                    Re: Navien tankless heaters

                    Well everyone that has installed Navien and that will be looking for Navien support will be out of luck in 2011. Navien will be filing for bankruptcy in the US market, they have already eliminated the office in Canada. Prices will be going up another 10% in the second quarter of 2010.

                    I say stick with what you know, but this will only spell trouble in the next 3 years when these units start to fail and parts are no longer.

                    This is what I was told from a buyer, don't hold your breath. If someone else had heard the samething let us all know.

                    Thanks.
                    Last edited by ChicagoPlumbin; 01-07-2010, 03:49 PM.

                    Comment


                    • #85
                      Re: Navien tankless heaters

                      Originally posted by ChicagoPlumbin View Post
                      Well everyone that has installed Navien and that will be looking for Navien support will be out of luck in 2011. Navien will be filing for bankruptcy in the US market, they have already eliminated the office in Canada. Prices will be going up another 10% in the second quarter of 2010.

                      I say stick with what you know, but this will only spell trouble in the next 3 years when these units start to fail and parts are no longer.
                      Where did you find this info ??

                      Comment


                      • #86
                        Re: Navien tankless heaters

                        I have only installed ONE tankless EVER.

                        It was the Navien CR something. Internal circulation pump.

                        That was about 4 months ago.
                        I spent about 4 hours JUST making sure that it would work for the application.
                        Made sure the meter would push it. 6 bath house with a pool heater.
                        I spent EIGHT HOURS installing it.

                        NOT ONE SINGLE PROBLEM.
                        Me thinks...
                        meh they are okay.
                        Attached Files

                        Comment


                        • #87
                          Re: Navien tankless heaters

                          Originally posted by Total View Post
                          Where did you find this info ??
                          A source that is no longer with Navien, it's a wait and see.

                          Comment


                          • #88
                            Re: Navien tankless heaters

                            Originally posted by ChicagoPlumbin View Post
                            A source that is no longer with Navien, it's a wait and see.
                            Sounds like a disgruntled employee...
                            I know plenty of people that quit or get fired and just can't say enough bad about a company

                            Comment


                            • #89
                              Re: Navien tankless heaters

                              Originally posted by SewerRatz View Post
                              The new Naviens have issues still. They have the widest temperature swing in the industry, along with many other issues. Till this day I still refuse to install these units anymore.
                              It can't possibly be worse than Bosch/Aquastar.

                              I have installed quite a few tankless, mainly Rinnai & Rheem and not a single service call aside from the annual flush. ()one customer who bought their own Rheem 4 gpm was shocked when the flow was reduced filling her tub, but not a real complaint)

                              The only tankless service calls have been from Bosch, one that wasn't even a year old where their customer service refused to listen to me when I told them the flow engine was defective and it took two weeks effort on the part of myself and the homeowner to get them to finally agree to mail the replacement part.

                              All the while the homeowner had to turn on two faucets in order to trigger the flow engine so he could take a freaking shower.

                              The service tech actually attempted to convince the homeowner I'd need to replumb his water system rather than admit I was right...and I was right, the part fixed the problem.

                              Comment


                              • #90
                                Re: Navien tankless heaters

                                Originally posted by ChicagoPlumbin View Post
                                Well everyone that has installed Navien and that will be looking for Navien support will be out of luck in 2011. Navien will be filing for bankruptcy in the US market, they have already eliminated the office in Canada. Prices will be going up another 10% in the second quarter of 2010.

                                I say stick with what you know, but this will only spell trouble in the next 3 years when these units start to fail and parts are no longer.

                                This is what I was told from a buyer, don't hold your breath. If someone else had heard the samething let us all know.

                                Thanks.

                                I wonder though, in light of the fact that I'm getting more tankless and high efficiency boiler requests than ever, if the stimulus incentives won't maybe change that projection.

                                A $1500 credit makes a world of difference for those who were deterred by the fat price tag till now.

                                Comment

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