Question about Bosch 1000P NG AquaStar 2.6 GPM Indoor Tankless Gas Water Heater

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We hzve natural gas ion oujr cabin but no electricity. Does Bosch 1000P NG require electricity? My plumber says electricithy is required. I need a DEFINITIVE answer. Thanks

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LOOK AT THE UNIT WHERE THE GAS GOES INTO THE UNIT IF YOU SEE SOME KIND OF A SPARK PLUG WIRE YES YOU WILL NEED ELECTRIC FOR THE UNIT TO FIRE, MOST OF THE UNITS HAVE WHAT THEY CALL A STANDING PILOT LIGHT WHICH STAYS LIT TO IGNITE THE GAS WHEN NEEDED. LOOK AT THE UNIT FOR INFO FOR VOLTAGE THERE HAS TO BE SOME KIND OF TAG FOR THIS TO COMPLIANT FOR SALE OF THE UNIT

Posted on Sep 23, 2009

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Posted on Jan 02, 2017

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Eratic hot water flow


Bosch 1600H NG??? I suppose. If so you need a digital manometer.
Take a static (off) reading then leave it hooked up and start flow. Watch pressure draw down and you should see the heater draw Water Column down below 5" as the pocket of NG in the pipe just before the unit draws down to minimal to keep heater lite. In that case problem in gas line size/gas line run length, Meter pressure.
If you have and maintain in operation 5" WC then is probably the water valve needs rebuilt along with a new diaphgram and also the water filter should be replaced too. This occurs esp after 2-3 year as Bosch specs rebuild at 3 yrs on the Maint Schedule. Also clean all the faucet aerators for good flow above 1.25 GPM Min at all faucets.
Under a single faucet flow (laundry sink) of 2.25 GPM the flame bed of the Unit should be 1"+ high and uniformly Blue.
I assume at this time you either have a Maint problem or you could be overflowing the heater's Winter capacity. This unit @ 70F rise only makes about 2.2 GPM. It's strictly a single use faucet heater at 117,000 BTU.
When you do the Maint look to see if there is corrosion between the GV pushrod and the water valve pushrod. Notice there is a huge mis- match in the 2 rods sizes.These units occasionally (more the 125B) corrode there and the GV will seize on and boil the heater dry and open a seam so you really want to maintain it to Bosch Specs and Schedule.
Note: This is a gas appliance & requires skill and knowledge to service. While Bosch may say you can DIY, I'd readily advise a Bosch approved Service Tech or Plumber do any rebuild. The Digital Manometer alone is a $100-150.00 item and it's the ONLY way to get accurate gas pressure readings.

Mar 14, 2014 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

We installed a Bosch 1600h ng tankless and it will occasionally ignite but not regularly??


Before calling service technician, open following links for Bosch troubleshoot resources:
1) General resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

2) Sales page: Notice the paradoxical promotion of unlimited hot water that saves 50% off utility bill.
http://www.boschhotwater.com/BoschHotWatercomHome/GasProducts/BoschModel1600H/FeaturesandSpecs/tabid/1024/Default.aspx

3) 1600H troubleshooting. Click each item and it opens drop down menu that also has links to service bulletins. Lots of reading, but a great way to get familiar with your product.
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/1600HTechSupport/Troubleshoot/tabid/1094/Default.aspx

I do not recommend tankless for the number of difficult and expensive problems, the required yearly maintenance, plus the specific need for incoming air quality, sufficient quantity of gas, water quality, water pressure, water volume, and correct venting and drainage of vent condensation. And never recommend self-installation since most tankless manufacturers refer immediate problems back to the installer.

Assuming the tankless was installed correctly and not defective:
Other problems can be caused by household conditions.
For example crossover:
http://waterheatertimer.org/Crossover.html
Tight house: tankless require more incoming air than tank-type because they burn so much more fuel per minute of operation:
http://waterheatertimer.org/pdf/Bosch_Ventilating_tight_houses.pdf
http://waterheatertimer.org/pdf/Bosch_Overcoming_fluctuating_temps.pdf
Low water pressure:
http://waterheatertimer.org/Low-hot-water-pressure.html

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And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Aug 27, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

I would like to know the electrical requirements.( voltage and amperage) Does it plug in or is it hard wired? If the power goes out is the hot water also out? thankyou


Are you asking about tankless gas or tankless electric?

You posted under Tankless gas water heater: gas type tankless plugs into standard 120Volt household outlet to power circuit board. You need larger gas line than used for tank-type gas water heater.

If you are asking about volt and amp draw of Tankless electric, then that depends on specific model number.
For example, if each tankless element draws 3500Watts, and unit has 3 elements, you will need 3 additional 20 amp 240Volt circuit breakers. Volts x amps = watts. 3500 watts divided by 240Volts = 14.58 amps. At full blast, this unit would draw 43.75 amps and will cost more to operate yearly than tank-type electric water heater. If unit has 4500 watts elements, then it will draw 56 amps at full blast, and use a good percentage of household power.

Tankless water heaters have no hot water in power outage. This is true for gas and electric models.

Additional resources:
http://waterheatertimer.org/images/Compare-water-heater-parts-650.jpg
http://waterheatertimer.org/pro-n-con.html
http://waterheatertimer.org/pdf/Bradford-White-on-demand-tankless-service-manual.pdf

Aug 04, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

Black soot on outside wall above hot air exhaust. Excess flame, incomplete combustion? How to adjust/correct?


All gas water heaters, tankless and tank-type, require cleaning burner and combustion parts.
Tankless manuals suggest once per year.
Tank-type once every 2-3 years.
Before calling service technician, open following links for Bosch troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://waterheatertimer.org/pdf/TWH-G1-13_Removing_and_cleaning_burners.pdf
Burners do not operate cleanly:
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/125BOTechSupport/Troubleshoot/tabid/602/Default.aspx

Jun 26, 2011 | Bosch 125BO NG AquaStar Outdoor Natural...

1 Answer

No gas through regulator


Before calling service technician, open following link for Bosch troubleshooting resources including online support, possible manual, and service bulletins.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Read manual for troubleshooting, advisories and required maintenance.

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
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May 28, 2011 | Bosch 1000P NG AquaStar 2.6 GPM Indoor...

1 Answer

Bosch 1600H-NG Natural Gas AquaStar AquaStar Natural Gas Tankless Water Heater. Problems with constant hot water. The heater turns ok but (i think) when i turn on the cold side the heater stops. at...


Possible flow sensor issue. Check to see if your water pressure fluctuates a lot or is fairly steady. These units are sensitive to the pressure. take care.

Feb 19, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

2 Answers

My old Aquastar tankless natural gas water heater used 1/2" gas line. My new Bosch 2700ES -NG says it requires no less than 3/4" inside diameter gas line. Do I have to replace all the gas supply lines...


None !!
3/4 pipe from gas meter or regulator. At low pressure there may not be enough gas flow through a smaller pipe for the boiler when on full bore.
The boiler input pipe will be 1/2" needing a reduction from 3/4 so there is some leeway.
I have about 8' of 1/2 pipe on mine [Bosch Worcester] from the reg. and it is ok.
You could use the existing 1/2 and try. No harm done if insufficient-just replace. If you have some other gas takeoff on the same line a 3/4 pipe up to that take off is most likely.

Jan 29, 2010 | Bosch 2700ES Natural Gas AquaStar ...

1 Answer

No hot water


Aquastar 1600H NG Natural Gas Tankless Water Heater Bosch AquaStar Model 1600H NG Natural Gas Whole house tankless gas water heater, 117,000 Btu input, natural draft with hydro-generated ignition. Provides endless hot water for one major application at a time . Can replace 40-gallon storage tank water heater. Optional Accessory: Model AQ1- Power vent with built-in... More freeze protection when venting horizontally. Capacity: 1 to 2 Bathrooms Dimensions: 8.75D x 18.25 W x 29.75H Weight: 40 Max GPM @ 45F Rise: 4.2 Energy Factor: NG .80 LP .84 Minimum Input: 28,000 Maximum Input: 117,000 Vent Size: 5 Gas Connection: 3/4 Water Connections: 1/2 Warranty: 12-year warranty on heat exchanger, 2-year on parts Features: Endless hot water Can save up to 50% off utility costs annually Perfect for one major application at a time No standing pilot, hydro generated

Mar 01, 2009 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

Takes a long time to heat water. Brand new Ge 50 gallon water heater. Once heated it right temp,just a long time to heat it and then won't maintain hot water. Is gas line to small? 3/8 copper line. Thanks


If you are using a 3/8" copper line for your gas, get it replaced ASAP. It will fail. 1/2" Black Iron is required with natural gas. 50 gallons is a lot of water to heat. Look on the heater label for the recovery rate.

Feb 27, 2009 | Bosch 1600H-NG Natural Gas AquaStar...

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