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***Installation Disaster*** homeowner needs advice
This is my second time posting in this group. I received some amazing advice previously.
System specifications Navien NHB150 & NTI DHW Tank.
Scope of work:
- Install NHB 150
- Install NTI DHW Tank
- Supply and install 1 euro slim radiator and one towel warmer.
Replace all existing iron pipe In basement ceiling from the manifold to the radiators on the first floor of the house( some pipes badly coroded.
- install one customer supplied radiator.
Total cost 17.2k incl HST
March 2nd 2020 The company I hired in Toronto, Ontario began work. They worked at my house every day for nearly 2 weeks. Upon completion as the job appears to be done around March 13th with exception of installing the ecobee thermostat. They were paid for the job.
Hours after they left and the heat was running I went downstairs and found multiple leaks and water gushing from pipes. One sweat fitting was never soldered once he left and the system got up to temp the flux melted and caused quite a leak. They returned to fix and all was good. Day 2 after install another serious leak was discovered spraying in a wall. Upon inspecting everything I found 5 leaks 4 of which they have yet to properly address but have attempted to fix 5X with failure.
Here is where things get wild. My DHW pump won’t stop it’s causing the loop to heat backwards and pump incredible heat into my radiators. My bathroom on the second floor reached 40C /104F this past weekend during a heat advisory.
Tech spent 2 hours and claimed aquastat was defective. Came back today replaced with a new aquastat that feeds off the 24v from the Navien. Claimed defective again ( if I’m not mistaken the navien doesn’t push enough amps to operate the switch). During this time I reached out to a friend of mine that actually works for Navien(wish I knew this before) he is a specialist in this system. He advised tech needs a standard Honeywell aquastat to work on this system. I provided this info and the tech confirmed with Navian support.
Just when you thought it couldn’t get better... hope you’re sitting down...
My friend at Navien asked for pictures of the install and everything. After reviewing he reported back that there was no tag or sticker on the gas line, I also found a copper radiator line they installed resting on the gas line. I called the contractor and just about lost it and threatened to contact TSSA. He arrived within 30 minutes and addressed the pipe on the gas line and not being the installer he put a sticker with the wrong Install date and the rest of the info he just put whatever. My friend also confirmed that everything is installed wrong and one pump in the system is missing. Thats likely pump is running nonstop causing heat to travel back up the loop. I confronted the contractor and his response was regarding the 3rd pump that the pump is inside the boiler. Well actually the NHB 150 does not have a pump inside it’s the combi that has the pump inside.
Long story short the easiest way to fix this is to reinstall the whole system at this point. I am very concerned as this contractor has not only totally screwed this up I don’t feel they are capable of doing this properly.
Opinions please on how to deal with this I am mentally taxed dealing with this clueless contractor. I fear my only recourse is to Call TSSA to investigate Which they will likely red tag me and hire someone else to reinstall the whole system and proceed with legal action against the company that originally installed the system.