Water Heaters - Bosch 1600H tankless water heater (NG)

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Soonergirl99
01-29-09, 09:39 AM
We installed a Bosch 1600H (natural gas) yesterday. When we first tried to start it we would get a spark but it would not light (the green light would not come on). After about 10-15 minutes of trying different faucets we now no longer get a spark.

We know it is getting gas. We reduced the gas flow into the unit from 3/4" to 1/2" because of existing pipes from the previous, very old, standard hot water tank. Could this be part of the problem? If not, what else could be wrong?

Thanks!

Michael Thomas
01-29-09, 10:40 AM
We reduced the gas flow into the unit from 3/4" to 1/2" because of existing pipes from the previous, very old, standard hot water tank. Could this be part of the problem?

Yes, if it's it's iron pipe, it needs to be 3/4" minimum, see pp 12 of your installation manual:

http://paragoninspects.com/images/temp/bosch1600H.jpg

and this FAQ Paragon Home Inspections Evanston / Chicago - Tankless Water Heater Installation FAQ (http://paragoninspects.com/tankless-heater-home-inspection-evanston-chicago-il-faq.html).