20 Most Recent Grundfos UP10-16B5/ATLC Comfort Series 1/33 HP Recirculator Pump with Sweat Questions & Answers

Replace pump? http://waterheatertimer.org/Water-heater-recirculation-system.html Gene If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Install air vent Clean impeller with white vinegar http://waterheatertimer.org/Water-heater-recirculation-system.html http://www.amazon.com/dp/B0078RZDS2/?tag=waterheaterti-20 Gene If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Most recirculation pumps can operate in 2 different modes.Timed mode where you schedule times of day on face of analog timer that rotates like a clock, or thermostat mode where the pump runs when water inside pipe drops below 90 degrees.The selector switch lets you choose which mode.http://waterheatertimer.org/Water-heater-recirculation-system.html If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Open following link to view how recirculation system looks:
http://waterheatertimer.org/Water-heater-recirculation-system.html

Ordinarily the cold water line is used to complete recirculation loop.
There is no reason why you cannot run separate line back to water heater instead of using cold water line.
The Grundfos system comes with crossover piece that connects hot-and-cold lines at furthest faucet.
Instead of connecting between hot-and-cold line, simply connect hot to your new hot water return line.

When your new line arrives back at water heater, it must connect to cold water inlet so return water is directed to bottom of water heater.
For critical safety concerns, do not remove TP valve to install new water inlet.
Nor is it best to use extra plug on top of tank to install new water inlet, unless you also install dip tube that directs water to bottom of tank.
http://waterheatertimer.org/How-it-works.html
In the case of tankless water heater, return line must be connected to cold water inlet also.

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The lines may have sediment build-up.
Clean re-circulation connection with CLR and see if that helps.

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Pull off the pump and clean it out.
The noise could be sediment build up causing pump rotor to make noise.
Noise could also be bad bearing or bad rotor.
Noise could be air bubbles in the line.
Once pump motor begins to slow, no mater what the cause, it overheats and begins to burn out.
Many times, once a motor has slowed, it never recovers and spirals downhill and stops working.
There are no repair parts for recirculation pumps.
Following page has general information plus links to Grundfos manuals, installation, and contact.
http://waterheatertimer.org/Water-heater-recirculation-system.html#Grundfos

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Following link shows links to grundfos and grundfos manuals.
http://waterheatertimer.org/Water-heater-recirculation-system.html#Grundfos

1) My grundfos stopped working because sediment clogged the pump, and the motor slowed.
When motors slow, they get hot and burn up.
I ask my friend who rewinds motors how to fix it, he said in the old days, they rewound every motor, but today they throw valuable scrap into landfill, and then buy new motors from China.
I told him not to retire, but go to school and teach kids how to rewind motors, and then took apart the grundfos line and cleaned it out with CLR, but it never worked again.

2) If timer stops working, but pump still works, you can buy cheap plug-in timer and connect grundfos to the cheap timer

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If your grunfos pump is clogged with hard water sediment, then it probably needs replacement.
You can try soaking it in CLR for a while, but I doubt it can be salvaged.
Sediment adheres to surfaces and there is no way to get inside the pump and scrub it out with a tooth brush.

You might benefit from replacing pump with the type that has a timer. That might save a bit of money. Or you can add a timer to the ordinary grundfos. If pump works fewer hours, it shouldn't clog up as quickly (or so the theory says)
And your water system might benefit by flushing your water heater each 6 months to prevent sediment from forming in the water heater.
http://waterheatertimer.org/Water-heater-recirculation-system.html
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

pumps of this type will fail quickly without water. They are lubricated, and cooled by the fluid that runs through them.

The Ranco ETC-112000-000 is a temperature controller commonly used for HVAC and refrigeration applications. To connect it to an indirect water heater, you can use it to control the temperature of the water in the indirect water heater's tank. Here's a general guide on how to do this: Please note: This is a general guide, and it's essential to follow the specific wiring instructions provided in the Ranco ETC-112000-000 user manual and the installation instructions for your indirect water heater. Materials and tools you'll need:

1. Ranco ETC-112000-000 temperature controller.
2. Indirect water heater.
3. Appropriate wiring and electrical supplies (cables, wire nuts, etc.).
4. Screwdrivers.
5. Wire strippers and crimping tools.
6. Electrical tape.
7. Safety equipment (gloves, goggles, etc.).

Steps to connect the Ranco ETC-112000-000 to an indirect water heater:

1. Read the Manuals: Before starting, thoroughly read the user manual of the Ranco ETC-112000-000 and the installation manual of your indirect water heater. This will ensure you understand the specific requirements and wiring diagrams for your equipment.
2. Turn Off Power: Ensure the power supply to the water heater and the Ranco controller is turned off at the breaker box to prevent electrical accidents.
3. Mount the Controller: Mount the Ranco ETC-112000-000 controller in a suitable location, typically on a nearby wall or control panel, within easy reach. Make sure it's securely fastened and level.
4. Wire Connections:
   • Connect the power supply wires (usually 120V or 240V AC) to the Ranco controller following the wiring diagram in the manual. Typically, you'll have two power wires: one for Line (L) and one for Neutral (N).
   • Connect the load wires from the Ranco controller to the electrical terminals on the indirect water heater that control the heating element(s). Refer to the water heater's manual for the correct terminals.
   • Make sure all wire connections are secure using appropriate connectors (wire nuts, crimps) and cover them with electrical tape to prevent any exposed wires.
5. Sensor Placement: Install the temperature sensor (usually included with the Ranco controller) into the water heater tank. Ensure the sensor is in contact with the water, as it will measure the water temperature.
6. Power On and Set Parameters: Restore power to the Ranco controller and the water heater. Configure the Ranco controller according to your desired temperature settings and control parameters. Refer to the Ranco manual for specific instructions on programming the controller.
7. Test and Monitor: Once everything is connected and set up, test the system to ensure it's functioning correctly. Monitor the water heater's temperature to make sure it maintains the desired level.
8. Final Check: Double-check all connections and ensure there are no loose wires or exposed connections. Secure the wiring neatly to prevent accidents or damage.

Check the breaker. Check the reset on the motor. Wiring connections. If you have power to the motor & motor doesn't work...you need new motor.

Normally you can just replace the motor with out changing the entire unit. A new gasket should come with the new motor.

Sounds as if it is siezing up, replace for new.

Replace it.

Last one I installed, I used a PIR sensor to control it, so that whenever someone walked towards the bathroom or kitchen, the pump will start up and run for 15 minutes. It really depends how often you use hot water - if only certain times of day, then it would be wasting power to run the pump, and heat loss from the pipes (unless very well insulated). If you have a regular pattern of use, then you could use a timer/programmer as you would on your normal hot water or heating. If your piping is plastic, then don't run pump continuously, as some plastic piping is not recommended for continuous circulation at normal hot water temperatures.

ManualsLib.com and enter grundfos pump ch 230 in the search area. Make sure to enter with the proper spacing.

Sounds like the diverter valve is not working. In order to heat the hot water, it needs to direct the circulating water to the heat exchanger rather than the rads.

No, the pump is not rated for outdoors. Build a cover for it http://waterheatertimer.org/Water-heater-recirculation-system.html Gene Water Heater Timers Save Money If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7