Navien Tankless Water Heater DIP Switch and Parameter Settings

[@I-doing-it]

Man!! You saved me from the scammers!! A plumber asked me to fix it for $700.00 I said no. I followed your explanation now my son can take a shower. May god bless you. Thank you very much !!!

[@bigjimsrealm4369]

Glad it was helpful. Thanks for the blessing!

[@howardiko7156]

Thanks so much I got more in 5 minutes of your video than the hours with the manual.

[@robertmoldovan5931]

This guy actually know how to explain things. Thanks for the instruction..

[@burningpile8371]

First of all, would be nice to get a manual. Wish my new home came with one. But you introduced me to the general idea & I went from 3 minutes of 120º max to the temp I set for as long as I run the hot water! Thanks a million!

[@bigjimsrealm4369]

@@burningpile8371 you’re welcome. Your builder should have the manual. If not you can download one online.

[@KevinMarshall-vk4sp]

This was an exact replacement for the old one that lasted about 10 years. kzbin.infoUgkx7yWIKcrbA9KMHkGSfcgxW2lsjHT6B8Sh The top of my mitigation tube by my roofline was just a 90 elbow which allowed too much debris to fall down into the fan, eventually ruining it. Without this issue, I bet it would have kept running another 10 years. When I replaced this fan, I added an extra elbow joint so the top tube now it does a 180, which should solve that problem. The radon guys around here wanted to charge me a $300 diagnostic fee, then parts/labor (probably close to $600 total). I installed this all by myself in about an hour for the cost of the fan; it would probably be even easier/faster with two people. FYI the manufacturer's warranty greatly differs depending on whether you install it yourself (1 yr warranty) or have a licensed installer do it (10 yrs).

[@realtoast7036]

Thank you! I just had the 240A installed and need to get the intelligent pre-heat setup. The installer didn't know S and I would have had to cold-call around the area to find someone with familiarity with the system.

[@fernandoalcantar7907]

Thank you!! This help me, plumbers also didn’t turn on the recirculating pump

[@captaincoyote1792]

Thank you, Jim, for this Navien video. While it didn’t answer to my issue (where the hell is that DIP switch? - I have an older 240a), I did learn something about my ten year old unit. BTW…..nice Porsche. I’m a long time owner of a 944, which is in winter-time mothballs right now. I’m already looking forward to spring! Take care!

[@1nvisible1]

Two seconds of notes that might be helpful Manual p45 dipswitch settings 1-3= recirc (int vs ext) 3 = intel preheating in "A" unit 5 = well pump is on 6 switch 9 off = sea level Programmming parameters p 64-68 Turn off + x 3 - x 3 + x 4 >1.TEC +x1 >2.PAR i Preheat is 20, title 24 is 5 p12 +x12 i >10 (flash) +/- i >wait reset (backs you out) power (off)

[@johnmcnally2227]

Thanks for making this video. FYI it looks like Navien has eliminated the dip switches in the newer models. It's been replaced with the initial setup wizard.

[@bigjimsrealm4369]

Thx for the heads up!

[@awi1330]

Good vid, helpful to see you go over it in real time

[@donkaspar5336]

Great video Jim. No I’m confident to mess with my parameters.

[@dshanahan99]

Jim, I am pretty sure the internal and external recirc is in reference to the pumps, Internal will use the pump you have internal to the unit and will push water through the circ loop via that pump. External would be if you had an external pump connected to the pcb in the water heater. The "A" units come all ready to go with internal recirc you just need to flip up dip switch 1

[@awnrc70]

wrong , if u set internal , it will circulate water only in the heater ,if external it will circulate in the loop in the house

[@BobsBudMan]

@@awnrc70this

[@broderp]

I need to find my manual now. Good information.

[@georgekabele640]

Great video, thanks. I will be installing same boiler and I see that fresh air intake you didn’t take it from outside bud is just in your basement, is this ok? Thanks for your reply, take care.

[@trevorhoward3328]

Appreciate you making this

[@mooch91]

That "well pump" setting is very vague - what does it do? I've always assumed it changes the control to better manage the pressure/flow swings associated with the well operation, but I've never really noticed much difference.

[@pk5786]

Hi Jim, anything in this unit that needs to cleaned or replaced even if the unit is working good?

[@da1dada]

GF’s new place has this water heater. The GPM is at 0.0, which parameter is that?

[@Schematics_38]

I have the same tankless boiler there’s an option for the gpm are we supposed to set that? It’s at 0.0 right now

[@davidg5629]

Hi. Is there a manifold for the circ pump (at the end point) or do you have a loop plumbed into your house? Not sure how the external loop works. Also, can you install PEX that close to a tankless unit? 18" linear for tanks. These things have really improved since the last one I installed. Great video, thanks. I'm sold.

[@bigjimsrealm4369]

The loop is plumbed into the house.

[@angelachen8770]

May I know how can do “no hot water “! I did cleaned the filter!

[@arbtrader43]

Hey Jim Have you stuck with the intelligent recirculation setting for a long while now? If so, how would you rate how intelligent it is? Any details appreciated ... thanks!

[@bigjimsrealm4369]

I have had it on since I posted the video. I would give the intelligence 6/10. But we are retired and don’t have a set schedule and we have 2 units servicing the house. But I would give the gas savings a 10/10.

[@godfollower920]

Very very helpful. Thank you!

[@christopherlee6195]

Why did you pull the cord rather than the plug when you unplugged it?

[@vyacheslavshimunov609]

You the best 👍

[@darrentoth7165]

Hey big Jim, looks like you utilized the recirculation with a return line, did you install an expansion tank and check valve on the cold water intake side? thanks :)

[@bigjimsrealm4369]

No. The house was plumbed with the hot water loop.

[@darrentoth7165]

@@bigjimsrealm4369 I am adding a hot water loop from the furthest bathroom and bringing that line straight back to the tankless heater and utilizing the built in recirc pump. Do I not need an expansion tank for my application? Thanks for the reply and great video!!!

[@bigjimsrealm4369]

@@darrentoth7165 Don’t know. Probably need to ask a plumber. 😀

[@myreviews4905]

Does the external recirculation have a sensor to put on the most distant bathroom like The Grundfos or Watts Hot water recirculation pump? So you have instant hot water? Any issues with this unit?

[@bigjimsrealm4369]

No remote sensor. It preheats the loop during times when you typically use hot water.

[@Tazod41]

Did the intelligence setting actually work, and if it did how long do you feel it took to learn your usage? Was the 10 min preheat sufficient or did you have to change it back. I have a new 240a2 and just changed setting from always on where plumber left it to intelligent so we’ll see. Good video

[@bigjimsrealm4369]

It’s working ok. We don’t have a steady pattern of hot water usage so it’s a little confused. My gas bill has gone way down. I did set the preheat time back to 20 minutes. Hope this helps.

[@AshleyC-vw7cu]

Do you know which way the black two-way switch should be for internal recirculating? 9 o’clock or 6 o’clock?

[@adammcgee8844]

9

[@kelbymorgan]

I just had a 240S2(NG) installed. If I set the temperature at 120f, the kitchen tap reads 90f after running for 10 minutes. If I bump it up to 140f, the kitchen tap will read 110f after running 10 mins. Anything I should check? I have already power cycled it. Just looking for things to check before my plumber gets here later this week. Thanks, Kelby

[@DBC-NC]

You are most likely loosing those degrees on the run between heater and fixture. If the water line between the two is accessible, try insulating it to maintain the temperature coming out of the water heater.

[@kelbymorgan]

@@DBC-NC thanks for the info Raymond. My plumber came by and it was a shower valve (showers not done yet) in my master bath allowing hot and cold to mix. Now the kitchen sink water will scald my hands!

[@arunramalingam6280]

can we connect to the system using the mobile app using wifi, do we need an adapter to connect using wifi ?

[@thomasjefferson3552]

I have the npe-150s unit and it takes 3 minutes to heat my faucet water. Would this solution work for my model? My navien is in my bathroom so i dont think its a pipe distance issue i am having.

[@rickyswanson8547]

Navien has changed this model of dipswitches.

[@slbynum]

In the menu, there’s also intelligent mode. I guess I’m confused. Why is there intelligent mode on and off in the menu and also dip switch settings?

[@bigjimsrealm4369]

You have the newer model.

[@shilpiveludandi]

do you know where is the thermistor and how to change for this water heater

[@bigjimsrealm4369]

No, sorry.

[@valueStocks]

My water takes forever to get warm. Is that what this pre heat is about. Keeps the lines warm?

[@bigjimsrealm4369]

Yes, but your house has to be plumbed with a hot water loop. The water heater can be set to preheat the loop.

[@CobraChamp]

Great video. Thanks!

[@danieljohnson2671]

Hey Jim what version is your book. My version is a 1.0 (Feb.2021) and my book does not show the dip switches like yours on page 45. I am hooking up a brand new NPE-240A2 with the internal pump.

[@bigjimsrealm4369]

My book is 5.4 Jan 2020. Also my unit is a 240A not a 240A2. Don’t know what the 2 means.

[@dergibog27]

Would a recirculation valve be beneficial for this model?

[@bigjimsrealm4369]

I’m guessing no. The unit has a recirculating pump in it. I don’t think any additional valves would be needed.

[@luisrgomez804]

Thank you, I’m having trouble with error codes and one is E438 is this sample fix or I need to change parts? Cay you help me?

[@bigjimsrealm4369]

Sorry, I’m not familiar with the error codes.

[@captaincoyote1792]

@ Luis R Gomez good morning, . I’m dealing with my Navien and internal vs external circulation….and a “mildly disturbed” wife when there was no hot water for her shower!. Our unit is ten years old, I’m in western MA, and we’ve had extremely cold temps recently. I’m in my manual (I have a 240A model)….and I have two pages of error codes…but no code E438. I do have a E038….which signifies “Abnormal Circulation Pump, with three suggestions: (1) check circulation pump, (2) check water valve sensor, and (3) check cold water main. I hope this helps…..damn this technology.

[@captaincoyote1792]

Good morning, Luis….my reply above accidentally sent to Big Jim

[@Dbonecapo]

Temp will not go up on my navien 240s only down, what can I do to raise the temperature?

[@user-ns8qp8md3m]

Did you figure this out?

[@corymccarty6496]

How dp i adjust the temperature

[@silva0003]

How do you increase PSI on this thing?

[@bigjimsrealm4369]

Unit shouldn’t impact psi.

[@CorvetteC6-LS2]

140f is good settings for my house?

[@bigjimsrealm4369]

120

[@CorvetteC6-LS2]

@@bigjimsrealm4369 is very cold outside 20°

[@CorvetteC6-LS2]

​@@bigjimsrealm4369right now she is on 133f that perfect right I don't want to use too much gas is very cold outside

[@chanhducphung2826]

Thank you for your video

[@redeyewill100]

Is 120 the max temperature?

[@bigjimsrealm4369]

I’ve heard 140. Never seen anyone go that high. Usually people go 120 or 125.

[@yingnyang2889]

@@bigjimsrealm4369 we had ours set at commercial setting (160 degs [8 yr warranty] vs 140deg setting residential temp - [15 yr warrant]). Been fine for a year. Then my kids said it was too hot this week (Jan 2023)?? I turned it down to 139 via the front panel, now it’s just luke warm can’t even make tea. AND the temp button stays at 139 and won’t go up. I’ll try your +++--++++ method

[@bigjimsrealm4369]

@@yingnyang2889 we leave ours at 120. It takes a few minutes to get the shower hot hot.

[@PaulWyandt]

We have the NPE-A2 and it allows temps 140-160 but you have to turn off the temp lock dip switch and enable commercial mode through the installer menu on the front panel. See manual p91.

[@michaeldamico9592]

I’m having one of these units installed in my house in a few weeks… trying to learn more about them…. But very hard to hear you in this video

[@ajnaprints]

Should be pulling combustion air from outside

[@Myoldiesrecordings]

Is there a video on just start up?

[@bigjimsrealm4369]

No, sorry. The plumber started them up.

[@kbabyblue]

I want to shutoff 1 area thats 1 room and is super hot Thermostat broke and I dont need that area So I can just stay with the house one

[@bigjimsrealm4369]

If there is a valve to shut off that area, should be no problem. What is the set temp on the water heater?

[@RS-cd9cf]

There is this weirdo guy Mikey Pipes up in New York who is a plumber and is also a registered Sx offender hates Navian and cries about them all the time

[@zavie22]

I guess you FAILED to read manufacturers manual it literally says do NOT put a 90 elbow directly on top of tankless lmao 🤣 amateurs