Noritz Tankless Water Heater Series 531 and 631 Models – Interesting Facts
I was looking over the owners manual for the Noritz tankless water heaters, models: Model N-0631S, N-0631S-OD, N-0531S, N-0531S-OD, and there were interesting thing in there.
For instance, I read the following:
“Do not drink water that has been inside the unit for an extended period of time. Do not drink the first use of hot water from the unit in the morning.”
What? Really! Why not! Don’t tell me not to drink the water and not tell me why. What is being leached into the water? Maybe there is too much solder exposed to the potable water? This needs further research!
The next thing that interested me was the statement: “Clean the filter on the water inlet as frequently as required by the quality of your local water. “I hope that isn’t often since I probably won’t ever get around to it. I peeked at the instructions about cleaning the water inlet filter, which is listed in the Noritz manual under “Periodic Maintenance”.
Here are the steps:
1. Close the water supply valve.
2. Open all hot water fixtures.
3. With a bucket ready, remove the inlet and outlet drain plugs (about 0.2 gal. will drain out)
5. Clean the water drain valve (with water filter) with a brush under running water.
6. Replace the water drain valve (with water filter) and close the drain plugs. (Take care not to lose the packing.)
7. Close all hot water fixtures.
8. Open the water supply valve and check that water does not leak from the drain plugs or water drain valve (with water filter).
I would hope that I wouldn’t have to do that very often.
In the troubleshooting section I discovered this item:
“• To keep the temperature stable, the heater limits the amount of water that can flow through it to a small amount initially, but the amount increases over time.”
Interesting, they should tell us more about this… maybe they do and I missed it.
Still in the tankless water heater trouble shooting section of the Noritz manual I came across this statement:
“• If the supply water is hard and has not been treated, scale can build-up in the water heater and decrease the maximum amount of hot water available. Scale can be removed from the water heater by flushing the unit periodically. To prevent scale from forming in the water heater, a water softener or scale inhibitor is recommended.”
Remote Control?
I never really thought about it, but that makes sense, since you may need to change the temperature setting and rather than go find the tankless water heater, you just pick up the remote in your bathroom and change the temperature setting. The remote also lets you set a pre-determined amount of water for things like filling your bathtub, although it seems to me to be a little frivolous. LOL to each his own.
Well, that’s all the interesting stuff I could find in the manual about the Noritz models Model N-0631S, N-0631S-OD, N-0531S, N-0531S-OD.
These models are great for green point of use water heater installations. Green because not only do you save energy with the tankless hot water heater, but you save water by eliminating long hot water lines. It’s about the greenest hot water plumbing you can get.
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