Question about Laing Thermotech Laing EcoCirc E14NSTN2W10 112 Threaded Spa Circulation Pump 230V

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I have Laing circulator pump(D5 solar 38/00) for my solar heater. There is a loud vibrating sound that is coming from it. What is that and what do i have to do to get rid of it?

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Posted on Jan 02, 2017

SOURCE: I have a Laing circulating

The sound may be air in the line or sediment build-up or the motor is slowing down.
Take apart the line and inspect the water line and nearby valves and nipples and elbows, clean pump & water lines with CLR remover.
Add air vent valve to the water line.
Check if the sound is directly at the pump or further down the line, say at elbow where sediment clog has gathered.

If this model pump is connected to wall under sink, then add foam insulation spacer between pump and wall.
Shooting from the hip, if this model is connected directly to galvanized or copper pipes at water heater, then check at plumbing supply if they have ideas for connecting pump to a sound-deadening union that can be inserted along a section of pipe.

Open following link for recirculation system resources.
http://waterheatertimer.org/Water-heater-recirculation-system.html

Add a comment to this thread and say what you did to solve problem.

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on plumbing or any do-it-yourself project.
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Posted on Jun 06, 2011

SOURCE: Laing model 330 Pump not working-delay in hot

Question not 100% clear.

1) The pump is not working? Does the pump make a noise? if pump is not working full-time, it can cause delay in arrival.
If pump motor is suspect, and outlet has power, then check override switch located on timer. Set override to Timer, move some of the trippers outward, then manually rotate timer dial until pump turns ON.
http://waterheatertimer.org/images/IMG_9325-grundfos-timer-800.jpg
If no noise is detected, or noise stops and starts, or seems strained, or if pump is hot, then pump motor may have burned out.

2) If pump is working, and makes noise like a humming sound, and pump motor is not hot, but hot water is not circulating, then unplug pump so it will not overheat and burn up.
Disassemble the pump and cross-over piece. Clean piping with white vinegar or CLR. Do not soak in CLR or it will damage seals. Rinse parts thoroughly. Reassemble and see if problem is resolved.
If pump is vibrating, then suspects include sediment and/or air inside line, and this can be resolved by cleaning as described. Also install air vent to increase life of pump.

3) Other causes for hot water delay at faucet are crossover.
Crossover can be caused by bad single-handled faucet cartridge, and/or by clogged-or-failed check valve on cross-over piece on grundfos.
This type of problem lets cold water enter hot line, and causes delay in arrival of hot water. Clean-or-replace the grundfos cross-over piece, and replace bad faucet cartridge.
Open following link for testing instructions:
http://waterheatertimer.org/Crossover.html

Resources:
http://waterheatertimer.org/Water-heater-recirculation-system.html
http://waterheatertimer.org/pdf/Troubleshoot-recirculation.pdf

Add a comment for more help.

Take a moment and rate answer for accuracy:
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.

Posted on Sep 17, 2011

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1 Answer

Laing model 330 Pump not working-delay in hot water delivery.In the past,a vibration occurred when cold water running above the pump.Can this be repaired.Power operating to pump. Thanks, mel ross


Question not 100% clear.

1) The pump is not working? Does the pump make a noise? if pump is not working full-time, it can cause delay in arrival.
If pump motor is suspect, and outlet has power, then check override switch located on timer. Set override to Timer, move some of the trippers outward, then manually rotate timer dial until pump turns ON.
http://waterheatertimer.org/images/IMG_9325-grundfos-timer-800.jpg
If no noise is detected, or noise stops and starts, or seems strained, or if pump is hot, then pump motor may have burned out.

2) If pump is working, and makes noise like a humming sound, and pump motor is not hot, but hot water is not circulating, then unplug pump so it will not overheat and burn up.
Disassemble the pump and cross-over piece. Clean piping with white vinegar or CLR. Do not soak in CLR or it will damage seals. Rinse parts thoroughly. Reassemble and see if problem is resolved.
If pump is vibrating, then suspects include sediment and/or air inside line, and this can be resolved by cleaning as described. Also install air vent to increase life of pump.

3) Other causes for hot water delay at faucet are crossover.
Crossover can be caused by bad single-handled faucet cartridge, and/or by clogged-or-failed check valve on cross-over piece on grundfos.
This type of problem lets cold water enter hot line, and causes delay in arrival of hot water. Clean-or-replace the grundfos cross-over piece, and replace bad faucet cartridge.
Open following link for testing instructions:
http://waterheatertimer.org/Crossover.html

Resources:
http://waterheatertimer.org/Water-heater-recirculation-system.html
http://waterheatertimer.org/pdf/Troubleshoot-recirculation.pdf

Add a comment for more help.

Take a moment and rate answer for accuracy:
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.

Sep 17, 2011 | Laing Thermotech Autocirc Undersink...

1 Answer

When the pump is running, if I turn on the cold water faucet the check valve opens and closes rapidly making a loud knocking sound. This problem only developed after four years of trouble-free operation.


Clean out check valve with CLR calcium-lime-rust and see if functionality is restored.
Problem can also be caused by air bubble inside the line, caught at the check valve. Dissemble and reassemble parts. Install air vent.
Another option is to install direct return line with in-line check valve and air vent.
Parts can also be ordered.
http://waterheatertimer.org/Water-heater-recirculation-system.html

Jul 24, 2011 | Laing Thermotech Autocirc Undersink...

1 Answer

I have a Laing circulating pump for a residential domestic hot water line. It was installed 7/8/2004. It has developed a whine that carries throughout the residence. The model is smt-909-bsw-14.


The sound may be air in the line or sediment build-up or the motor is slowing down.
Take apart the line and inspect the water line and nearby valves and nipples and elbows, clean pump & water lines with CLR remover.
Add air vent valve to the water line.
Check if the sound is directly at the pump or further down the line, say at elbow where sediment clog has gathered.

If this model pump is connected to wall under sink, then add foam insulation spacer between pump and wall.
Shooting from the hip, if this model is connected directly to galvanized or copper pipes at water heater, then check at plumbing supply if they have ideas for connecting pump to a sound-deadening union that can be inserted along a section of pipe.

Open following link for recirculation system resources.
http://waterheatertimer.org/Water-heater-recirculation-system.html

Add a comment to this thread and say what you did to solve problem.

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

Jun 06, 2011 | Laing Thermotech Laing SMT-909-BSW-14...

3 Answers

How do i test a e10-nshn2w20 to see if it works


We are play with 230V here Two hot wires and a ground center off pump to water top off pump to lawn

Feb 27, 2011 | Laing Thermotech Laing Circulation Spa...

1 Answer

I have had 2 pump failures with the laing e14ns can the pump be re.built with out the electronics for reliability


No.

Their pump design is propietary and no other manufacturer makes a drive motor that will install on a Laing pump end.

John

Oct 23, 2010 | Laing Thermotech Laing EcoCirc E14NSTN2W10...

1 Answer

Which circulating pumps works on tankless water heaters


Laing UCT-909-TANKLESS UltraCirc Tankless Water Recirculating Pump

This is designed to maintain the proper flow to fire the heater. Please be sure the pressure in the house is at least 5 psi over the minimum required for your unit.

Apr 03, 2010 | Rheem Tankless Hot Water Heater...

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