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Author Topic: Dhw question  (Read 3680 times)

DonE911

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Dhw question
« on: November 06, 2014, 03:58:45 PM »
New user.....  not running long but I have a small issue with the hot water.

I have my mixing valve connected to a manifold and distribute the water to two hot water heaters from the manifold.  One water heater is a very small (maybe 15 gallon) unit that serves a small bathroom and the other that is upstairs (30 gal) serves everything else.   On days when no one is home the water in the hot water heater cools down and the water coming to the house is like 50 deg.  It takes a long time for the hot water to mix with the cold in the hot water heater and provide hot water.... after it is hot in the tank it is fine but waiting 5 minutes or more to get in a shower is not okay.

I have two empty ports on the manifold and I am thinking about running a line to the hot out side of each hot water heater to get my more instant hot water.

I plan on leaving the hot line on the cold fill tee as well.   I don't see an issue here but I'd rather ask you folks first.

Thanks in advance
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slimjim

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Re: Dhw question
« Reply #1 on: November 06, 2014, 05:48:06 PM »
I'm not sure what you are considering doing but by all means DO NOT run boiler water directly into potable water, you will get very sick!
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DonE911

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Re: Dhw question
« Reply #2 on: November 06, 2014, 06:53:20 PM »
lol.....  no no no.....  its the potable water that is warmed by the plate exchanger..... leave the exchanger.... into mixing valve ( so not to burn ya ) and into a manifold  with four ports....  each hot water heater gets a 1/2" line to the cold supply side of a hot water heater from one of these ports.  I was considering running the other two ports from the manifold into the HOT out line on each of the water heater so I would not have to wait forever for the water in the hot heater to be reheated after it has turned cold from sitting still all day......  maybe that would make the supply line into(cold supply) the hot water heater useless 

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RSI

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Re: Dhw question
« Reply #3 on: November 06, 2014, 09:43:02 PM »
Have you considered getting a recirculation pump for the DHW and just pump it from the tanks back through the plate when necessary?
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slimjim

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Re: Dhw question
« Reply #4 on: November 07, 2014, 02:19:21 AM »
It would render the existing lines useless, RSI is right, a recirc pump will do it or add a side arm,either way will work.
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