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I have engineer who wants to install this direct vent heater about 14" above the exhaust of the heating unit , my concern is the water heater would bring in products of combustion from the heating unit being so close

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You should be concerned since there may be a possible transfer of condensations or c/o. If the vents are off set by 3 feet one way or the other and 14" above, there should be no problems as long as it is not an in a closed area.

Posted on Dec 29, 2010

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Posted on Jan 02, 2017

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2 Answers

Wall above Direct Vent Heater gets very hot.


Sense heat rises the only real way to help this is to put some sort of thermal barrier above the heater.

Mar 21, 2017 | Heating & Cooling

1 Answer

Error code 14


This is the latest I have. recommend calling Rheem customer service. They are very good
14 Overheat Wrap Fault
Ensure high fire and low fire manifold pressure are correct.
Check gas type of unit and ensure it matches gas type being used.
Check heat exchanger for cracks and/or separations.
Ohm out safety circuit.
Check for improper conversion of product.
Check for restrictions in air flow around unit and vent terminal.
Check for a foreign materials in combustion chamber and/or exhaust piping.

Jul 14, 2014 | Rheem RTG-84DVP Indoor Propane Tankless...

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How do i fix code 14 on a rheem tankless water heater model # rmtg-66dvp


Code 14 Overheat Wrap Fault
Ensure high fire and low fire manifold pressure are correct.
Check gas type of unit and ensure it matches gas type being used.
Check heat exchanger for cracks and/or separations.
Ohm out safety circuit.
Check for improper conversion of product.
Check for restrictions in air flow around unit and vent terminal.
Check for a foreign materials in combustion chamber and/or exhaust piping.

Jun 28, 2014 | Rheem Water Heaters

1 Answer

Code 14 comes up on the remote what does that mean


Before calling Rheem or service technician, open following link for troubleshoot resources including error codes, Rheem chat, typical required maintenance manual, and possible product manual:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Error codes are start point for troubleshoot.
Error 14 is 'overheat wrap fault.'
This can include venting problem, failed heat exchanger, bad safety circuit, gas problem.
Rheem does not have a service manual posted for this specific problem.

Additional information: Tankless water heaters consume large amounts of gas during combustion. The combustion burns away hydrogen and the remaining poisonous byproduct is vented into the atmosphere at each home day and night.
Byproduct includes acidic water vapor that condenses along the vent pipe and drips back down vent.
Each tankless vent pipe has a drain line that directs acidic water into household drain.
If this drain line becomes clogged, or if vent was not installed correctly, then water drips down into heat exchanger and can erode or crack exchanger.
The typical maintenance manual above shows steps that can solve many tankless problems before they happen.

Sep 11, 2011 | Rheem Water Heaters

1 Answer

The computer code 14 comes up on the computer what does that mean.


Before calling Rheem or service technician, open following link for troubleshoot resources including error codes, Rheem chat, typical required maintenance manual, and possible product manual:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Error codes are start point for troubleshoot.
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf
Error 14 is 'overheat wrap fault.'
This can include venting problem, failed heat exchanger, bad safety circuit, gas problem.
Rheem does not have a service manual posted for this specific problem.

Additional information: Tankless water heaters consume large amounts of gas during combustion. The combustion burns away hydrogen and the remaining poisonous byproduct is vented into the atmosphere at each home day and night.
Byproduct includes acidic water vapor that condenses along the vent pipe and drips back down vent.
Each tankless vent pipe has a drain line that directs acidic water into household drain.
If this drain line becomes clogged, or if vent was not installed correctly, then water drips down into heat exchanger and can erode or crack exchanger.
The typical maintenance manual above shows steps that can solve many tankless problems before they happen.

Sep 11, 2011 | Rheem Tankless Water Heater Main Remote...

1 Answer

Flashing code 90 .


The 90 error code is caused by two conditions:

1) the unit is under heating the water (not hitting the set temperature)
2) the fan is encountering resistance to air flow, which causes it to over correct

The most common causes for this conditions are:
1) insufficient BTU supplied to the unit
2) clogged fan motor or vent
3) insufficient makeup air
4) improperly installed exhaust vent

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1 Answer

Black film from furnace/AC


I would be concerned that exhaust is not venting properly and the soot is getting into the fresh air side of heater. Have unit checked for carbon monoxide presence in fresh air ducting. Heaters use a heat exchanger the is heated by the furnace and fresh air is blown through yje exchanger to be warmed before it gets out the vents. If the exchanger is damage or rusted through the good and bad ai can exchange creating a serious/ life threatening condition. I recommend professional inspect and repair and have a carbon monoxide detector in place and functioning. Be safe and good luck

May 16, 2009 | Heating & Cooling

2 Answers

What is error code 59 on a noritz tankless water heater lp?


The 59 code is typically caused by insufficient gas supply to the unit. It can also be caused by obstructed exhaust flow, stuck exhaust damper (located directly on top of the unit's exhaust), insufficient makeup air, or improperly installed venting (i.e. too long or too many elbows).

I would recommend initially checking the incoming gas pressure at the gas connection on the unit. The gas pressure should not drop below 5" water column for a natural gas unit, 8" for a propane system (the unit need to be operating at its maximum output).

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1 Answer

B vent configuration of direct vent propane heaters


Yes, the design of the combustion chamber is limited at how much fresh air and combustion air can enter it. If you lengthen the venting, you will be causing more restriction and there will not be enough natural air movement to make it work. It will start, run for a minute or two and poof out. Not to mention you will be circumventing it's UL rating and if you sell your home with it installed, you are liable for any fatality or damage. Do you want to risk that? Don't even think of doing it! There are "Box" heaters out there sized from about 5,000 Btu's on up to 100,000 Btu's. Check the web.

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