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Easier to fast fill the system using the external feed/relief. But your right navien rec's using auto fill.

Originally Posted by worm5932

You did the job about 4 years ago? You'll feel the same way in about 3 years.

While we are digging up old posts, I still love propress! Do yearly PMs on a lot of the jobs we have been pressing since 12’ with no issues.


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Originally Posted by jimmyed

Navien is a horrible company to deal with.

Do you still feel this way 7 years later??? If so give some detail. Companies can sometimes improve their customer service greatly and I have found Navien to be one of the best.

Some things take time. Someone just answered a question yesterday for me. I asked the question seven years ago. <g>

PHM
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Originally Posted by Pnasty

Please don't dig up anymore 3 year old posts. Especially if you are only going to bash the equipment and not comment on the install, which is what this board is for.

Originally Posted by paulheater

Navien i had bad experience with their service teck wanted to dump the fault on end user and thats not right hope your issue was resolved good luck with Navien units looks like they have lost lot of customers due to their service and they want to quickly turn the fault on customers so end user has to buy parts which are costly its worth Rinnai at least they are honest and helpful

I would not recommend Navien bad taste

Please don't dig up anymore 3 year old posts. Especially if you are only going to bash the equipment and not comment on the install, which is what this board is for.

Originally Posted by alliedtech12887

Attachment 530721

Thanks ! I figured that was the usual but thought he mentioned something else...

Attachment 530721

It's common with all these style boilers, they run off priority demand and DHW is always priority #1.

Where you have the primary / secondary H - could you have saved the two 90's by aligning the upper and low pairs of verticals?

Or is there a functional reason for the 90's to be there?

PHM
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Originally Posted by alliedtech12887

Navien Boiler install, not 100% done but pretty close. Attachment 468201

Originally Posted by njbiker66

Combi Boiler the two pipes are for Domestic hot water. These boilers are really nice and do a great job keeping up with both heat and hot water at the same time. Can't wait put mine in.

I have a weird issue with mine.. Once the hot water side goes on the heating side immediately drops the supply temps down to the same as the hot water temp leaving the dhw side... I thought this was common with Naviens.. Any idea how to adjust this so it doesn't happen ?

[the only thing worse then training someone and having them leave is not training someone and having them stay]

good piping job however i agree the drain could have been better and the vent pipe should have been CPVC or Polypro,

The only propress issues I have seen are installation errors. Such as fitting not seated correctly or it does not get a full crimp.


The future isn't what it used to be.

I see propress on well and city water stuff running at much higher psi then boilers with no issue.

I would imagine the turbulence created by a propress fitting would be much less than the cavitation and turbulence caused by flo checks and circulators.




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I was on a ton of Navien installs in the past 5 years.we also used the fb38 reducing valve. I went back 5 times out of 30 or do with a 9 lb lock out

Originally Posted by alliedtech12887

Well I guess that's just a personal preference. I've never experienced anything like that with propress, as long as it's been properly preped and fitted. The company I work for did a 20 million dollar mechanical job about 4 years ago in all propress due to strict fire watch protocols. There were maybe about 5 leaks during the job and hasn't been one since.

You did the job about 4 years ago? You'll feel the same way in about 3 years.

Originally Posted by worm5932

Propress makes the pipe slightly out of round and causes turbulence, which leads to leaks. I've seen a lot of it.
I prefer to use pumps and check vales to zone. A pump is generally less expensive than a valve and I've found more reliable.
Now I have used propress and zone valves, just don't anymore if I can make the decision.

Well I guess that's just a personal preference. I've never experienced anything like that with propress, as long as it's been properly preped and fitted. The company I work for did a 20 million dollar mechanical job about 4 years ago in all propress due to strict fire watch protocols. There were maybe about 5 leaks during the job and hasn't been one since.

Originally Posted by alliedtech12887

What's wrong with the propress and zone valves?

Propress makes the pipe slightly out of round and causes turbulence, which leads to leaks. I've seen a lot of it.
I prefer to use pumps and check vales to zone. A pump is generally less expensive than a valve and I've found more reliable.
Now I have used propress and zone valves, just don't anymore if I can make the decision.

Originally Posted by worm5932

Am I the only one who thinks the secondary loop is tied in wrong? I thought the boiler loop is supposed to be the primary. I also don't like pro press or zone valves, but that's just personal preference.

What's wrong with the propress and zone valves?

Piping looks correct to me. The circ for the primary is inside the boiler cabinet.

Attachment 473901


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Am I the only one who thinks the secondary loop is tied in wrong? I thought the boiler loop is supposed to be the primary. I also don't like pro press or zone valves, but that's just personal preference.