I have a Rheem Power Vent hot water heater. Model 21VP50E-1 A. The hot water heater makes hot water and keeps up with demand. Problem or no problem: main burner cycles on and off in about 5 second intervals. Downloaded technical service bulletin 1602 for troubleshoot from Rheem. Vacuum safety switch checked sat, 24V between 24V (GND) and terminal #5. Also jumpered vacuum hose with need and same results, no vacuum line blockage. Blower motor runs normal. Ignition control module checked SAT, 24V between 24V terminal and 24V (GND) terminal. Thermostat and transformer SAT. Do I have a problem or is this normal. Thanks in advance for any info/insight.
Jeff
Your question is very complete and technical. With this level of information you can also post question on professional water heater forum:http://www.thetankatwaterheaterrescue.co...Your question is very complete and technical. With this level of information you can also post question on professional water heater forum: http://www.thetankatwaterheaterrescue.com/forums/forum3/
geno, Thanks, I posted of the site you suggested. Will let you know how things go.geno,
Thanks, I posted of the site you suggested. Will let you know how things go.
2/20/11 - After a day of trouble shooting here is where I think I am. I connected a volt meter between the 120V/24V transformer out to the vacuum control valve. The voltage was steady, between 24.3V-28.9V, through all cycles of the hot water heater. This indicated to me that the thermostat, that is in line with the 120V/24V transformer, on the 120V side, was not cycling the voltage to the vacuum control valve. The voltage on the outlet of the vacuum control valve was cycling between 0-24.2V. This indicated that the vacuum control valve was tripping the gas valve. I made a home made manometer and checked the blower vacuum. The troubleshooting guide from Rheem states that the blower should be able to draw between .6-1.5 inches of water. Based on my manometer, not super accurate but able to give me some indication, was indicating between .6-.7 inches of water. I noticed over the day that the heater ran normal except during extended run time due to demand. The electric motor was extremely warm to the touch due to running and the hot exhaust gases. That is when the cycling began. I believe the blower motor is about ready to give up the ghost. Now begins the search for the part. If anyone thinks I am going in the wrong direction, please leave me a note. Thanks2/20/11 - After a day of trouble shooting here is where I think I am. I connected a volt meter between the 120V/24V transformer out to the vacuum control valve. The voltage was steady, between 24.3V-28.9V, through all cycles of the hot water heater. This indicated to me that the thermostat, that is in line with the 120V/24V transformer, on the 120V side, was not cycling the voltage to the vacuum control valve. The voltage on the outlet of the vacuum control valve was cycling between 0-24.2V. This indicated that the vacuum control valve was tripping the gas valve. I made a home made manometer and checked the blower vacuum. The troubleshooting guide from Rheem states that the blower should be able to draw between .6-1.5 inches of water. Based on my manometer, not super accurate but able to give me some indication, was indicating between .6-.7 inches of water. I noticed over the day that the heater ran normal except during extended run time due to demand. The electric motor was extremely warm to the touch due to running and the hot exhaust gases. That is when the cycling began. I believe the blower motor is about ready to give up the ghost. Now begins the search for the part. If anyone thinks I am going in the wrong direction, please leave me a note. Thanks
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Re: I have a Rheem Power Vent hot water heater. Model...
I see your question posted under JJ, and will also watch for the answer. The Tank has amazing amount of water heater information. But the industry is also changing very fast.
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This is an on demand water heater, often called an instantaneous hot water heater. If you are losing water from the delivery (faucet) side, the boiler should be alight. Wherever the leak is from, you must be able to see it, unless you are on a water meter and observing the loss there. In which case you have a broken service pipe between the meter and the house.
3) Read product manual for power vent specifications. Keep in mind that power vent on top of heater can sometimes cover access to anode rod located on top of tank.
Why is it always Rheem problems? Every water heater problem is Rheem. And Rheem doesn't post any service manuals, like the other two big manufacturers, AO Smith-American, and Bradford White.
That is a power vent failure code. Rheem is aware of this problem and are changing systems as we speak. Call your Rheem dealer and demand the updated system.
Hello Check the red overtemp reset button at the temp control.Check for contintuity at the elements with a volt meter (pull one wire off first) they should have a reading otherwise they are open & shot.Last is overdrawing (busted pipe) shut off the cold water supply for a 1/2 hour and open it back up and feel the hot water supply pipe.Is it hot?The tank can't keep up with the demand.
1. Turn off power vent blower and set water heater temp to vacation (lowest temp) 2. Turn on power vent blower 3. Turn the water heater temp from vacation (lowest temp) to hot (highest temp) four times. 4. Set the water heater temp to normal
Your question is very complete and technical. With this level of information you can also post question on professional water heater forum:http://www.thetankatwaterheaterrescue.co...
geno,
Thanks, I posted of the site you suggested. Will let you know how things go.
2/20/11 - After a day of trouble shooting here is where I think I am. I connected a volt meter between the 120V/24V transformer out to the vacuum control valve. The voltage was steady, between 24.3V-28.9V, through all cycles of the hot water heater. This indicated to me that the thermostat, that is in line with the 120V/24V transformer, on the 120V side, was not cycling the voltage to the vacuum control valve. The voltage on the outlet of the vacuum control valve was cycling between 0-24.2V. This indicated that the vacuum control valve was tripping the gas valve. I made a home made manometer and checked the blower vacuum. The troubleshooting guide from Rheem states that the blower should be able to draw between .6-1.5 inches of water. Based on my manometer, not super accurate but able to give me some indication, was indicating between .6-.7 inches of water. I noticed over the day that the heater ran normal except during extended run time due to demand. The electric motor was extremely warm to the touch due to running and the hot exhaust gases. That is when the cycling began. I believe the blower motor is about ready to give up the ghost. Now begins the search for the part. If anyone thinks I am going in the wrong direction, please leave me a note. Thanks
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