Circulation pumps used in spas and hot tubs, also called Circ Pumps or Hush Pumps, are low-flow pumps that constantly circulate the water (24/7) very slowly, to continuously filter, heat and chemically treat the water. Installation and Operation Instructions, Raytherm Residential Boilers, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the, "Residential Hydronic (circulating hot water) Heating Systems", Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987, "Warm Air Heating Systems". Many spas use a 2-speed therapy pump, with low speed used for constant circulation, and high speed used for turning the jets on high. Hot water could be circulating by convection, thus also causing the boiler to run as cooler water returns to the boiler by convection. why is the circulator suddenly running non-stop? In some cases over a minute, which then washes all that water down the drain. They are commonly found circulating water in a hydronic heating or cooling system. See CIRCULATOR PUMP WON'T STOP RUNNING for details. Circulation pumps tend to last 5-10 years, although your mileage may vary. Some circ pumps have an air bleeder knob, or you can loosen the union nut to release the air. Booklet. If baseboards or radiators still are getyting hot AND the thermostat is not calling for heat (or has been disconnected entirely) then is there a fix? If you happen to have a circulator pump that cannot stop running, then there are a few different things that you can do to help this. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Question: Why is the circulator pump making noise, and what can be done about it? There will be no zone valves, just a single pump and its controls to turn the circulator pump on and off. My Aqua-Flo circulation pump finally packed up after about 7 years although I had the bearing replaced. Answer: Possible cause of fault. Gurgling, humming or grinding noises on a spa circulation pump are good indicators of a problem. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. This Grundfos super brute circulator pump is made of cast iron. These domestic hot water circulation pumps are great in big homes with log runs to get hot water to a fixture in a timely manner versus running water for a minute or two to water. Air in the pump. You can then examine the heating system distribution piping leaving and returning to the heating boiler, identify the circulator pump (or pumps if there is more than one), and feel the heating water piping at the pump(s). It's easy to check this. If you decide to replace your hot tub circulation pump, the job of actually replacing a circ pump seems to be less trouble for most people than ordering the correct replacement circ pump for your particular hot tub. It could also result in corrosion as well as your pump just not lasting as long as it should. Thank you for any ideas as this boiler is costing me a small fortune. Weil Mclain boiler with 2 zones and 1 circulation pump. BAD BEARINGS: Inside of a normally quiet circulation motor are two bearings that ensure smooth rotation of the rotor within the stator. The heater fins get cold like they are supposed to and the heater runs normally. So, to save themselves from the GIGANTIC task of developing millions of pumps for different homes, the clever little central heating pump manufacturers developed a variable speed dial that allows you to easily increase and decrease the speed of water circulating your home depending on your needs. I do audio recording in … For years, recirculating pumps have been standard fixtures in quality hotels, gyms and dining establishments, but they are becoming more common in private residential use as well. Hot Tub Pump Not Working. When I’m done vacuuming the pool, the pump motor gets hot and shuts off. Or, it could be the bearings in the motor going bad. Posted by TLC - April 20, 2018 - Water Heaters. Sign up for exclusive deals at Hot Tub Works! from a taco sales rep to me. Remedy. Have you ever wondered why your hot water faucet gives you cold water when you first turn it on? Is the circulator pump running? Is the perfect replacement for all those tired of waiting long hours to get some hot water? Great first steps in diagnosis, Randy; When we have heat on one zone and not others I look for: All Rights Reserved. Where they were once provided as a convenience to clientele, they are now being used as a way to cut costs ar… I felt circulating pump and seemed fairly warm. InspectAPedia tolerates no conflicts of interest. Could this be a circulator pump, or something else? Some large homes even use a number of pumps together to warm specific areas of the … The wire that is going around the circulation pump is in the incorrect place, not because it is un-tidy, but because the central heating pump can get very hot and therefor, will heat the electric current up, causing it to either trip the electric, heat the electrical elements within the circulation pump, more than they should or even set a fire is the worse scenario. A recirculating pump can solve this dilemma. Regardless of zone demand for heat or satisfied & regardless of boiler temp, and confirmed 110V across C1 & C2 terminals, C1 ( Honeywell L7224) indicator & pump stay on! Or see CIRCULATOR OPERATION CHECK FAQs - questions & answers about simple diagnostics for the hot water heating circulator, posted originally at the end of this page. If there is no action at all from the circulation pump, your topside control panel should be giving you an error code, perhaps a FLO or OH. If the circulator is on the pipes that are LEAVING the boiler and sending heat into the building (not the best location) it's better to feel the pipe on the outlet side of the circulator since the pipe at the inlet side might be hot just by convection heat rising from the boiler. Check that power is on, and the breaker or GFCI test button are not tripped. After replace the bell housing if one of our circulatory pumps.It is still leaking errrrrrr. Apoliges Ron but I don't quite understand the question. All getting proper voltage and confirmed working. When the temp outside goes down into the teens, my heating system (3 zones) is not working properly in only one zone. And it works at a voltage of 115 volts. Come along shall we . If it's not the system may be airbound. I turned boiler off during summer. Now when the outside temp is in the thirties the heat seems fine. 3 mins and everything shut down including control module. . This is particularly common on heating systems that have been left sitting for a while. Your low-pressure water or cold showers would be the least of your worries if you end up having to deal with a busted boiler that suffered more damage only because you tried to fix it and ended up making it worse. That is just way too much time in our fast paced world and it does waste a good deal of water. Follow the circ pump plumbing, and look for any possible kinks in the hose. Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987. It is already hot at the point of arrival. The fins of the hot water baseboard are warm to the touch and stay that way and never get co ld and they don't throw heat out into the room . Circulation pumps used in spas and hot tubs, also called Circ Pumps or Hush Pumps, are low-flow pumps that constantly circulate the water (24/7) very slowly, to continuously filter, heat and chemically treat the water. The pump will get warm, but it shouldn’t be hot to the touch. What do you think should be moving or have to be moved at the circulator pump in order to lubricate it? If the circulator pump is on the RETURN side of the heating piping loop (the usual and better location) then you can feel the pipe at the circulator pump - doesn't matter which side - in or out flow - since if the pump is running the pipe will get warm, then hot if it is successfully moving hot water out of the boiler and through the heating pipes. Continue reading at CIRCULATOR PUMP LEAKS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Spa circulation pumps don't wear out and pump less water over time, they either work or they don't. Now, the circulation pump turns on every 5 minutes for about 40 seconds (I timed it). A circulation pump keeps the hot water constantly moving through the home's plumbing system, so when a hot water tap is opened, the water will be hot right away. I can't help but think the furnace runs all the time. Anonymous says: July 15, 2019 at 8:20 PM Forgot to mention. This is a new behavior, and was not the case before. Even when I power down the system, wait 30 seconds or even 2hrs, when reenergized, 10 seconds of silence, C1 indicator light goes on, followed by a relay click, and circulator turns on. sounds like b.s. This is not only inconvenient, but wastes a lot of water. Grundfoss circulator pumps are quieter but should be audible. Not all spas have a circulation pump however. They can be removed with a stiff brush, or a chemical like CLR. you could desire to be attentive to the amp-hour score on your battery then divide that quantity by 5-6 to get an approximate time the pump could function on backup. Open up the circulation pump as described above to check this possibility. Some buildings use one circulator pump (and controlling circulator relay switch) to control each individual heating zone (instead of "zone valves" as above). A circulator pump or circulating pump is a specific type of pump used to circulate gases, liquids, or slurries in a closed circuit. Therapy or Jet pumps have much higher Amp usage, and you would see at least 6 Amps listed on the motor label. This is with no TT demand and BT above limit. 5. Click to Show or Hide Citations & References, BELL & GOSSETT B&G EQUIPMENT MANUALS & CONTACT. Now, you turn on the hot water and wait for the heated water to finally arrive. Hot tubs are usually on patios and back porches, exposed to the elements. A broken circulator pump could cause your entire boiler to eventually break down, which will be much more costly than replacing the pump. In that case the same procedure as below for "feeling the circulator piping" is used but you feel the piping at the zone valve as well - since if a zone valve is not opening no hot water will flow. Today I went to re-start and it all seemed OK: ignition control module started, exhaust fan ran, glow plug worked and fired the flames. First, before checking the circulator pump for proper operation, we need to be sure that the heating system controls are calling for heat: 2. The pump is self-venting. When the heat has been shut off and all of the piping and baseboards or radiators in a building or cold it can take a while for the return line at the boiler to warm up. Re: Hot water from cold tap when circulation pump is on; Author: hj (AZ) WE would have to see, and check, the entire system, because SOMEWHERE there is a "path" for the hot water to utilize the cold water line to return to the pump. I've seen them last only a few years, and I've seen them last 20 years, and I wish I knew the secret to a long life, but it seems random. On some occasions (especially when the motor is extremely hot), the pump’s motor is the problem. All eight pumps had been installed in the previous two years - at a previous inspection we found the predecessor pumps leaking so badly that the floor of the boiler room was puddled with heating water. Macmillan Publishing Co., NY, The ABC's of Retention Head Oil Burners, National Association of Oil Heat Service Managers, TM 115, National Old Timers' Association of the Energy Industry, PO Box 168, Mineola, NY 11501. Common spa/hot tub circulation pumps are made by Aqua-Flo, Grundfos, Laing and Waterway. Let it run for a while. The heating distribution piping in a one-zone building may still be divided into multiple "branches" or sub-loops. the motor is very hot. I can hear air purging in the filter and then it shuts off. Identify the circulator for the heat zone where you have turned up the thermostat: If there is only one thermostat, one heating zone, and one circulator pump it's simple, there is nothing to sort out, continue. It ran for approx. not much room for relief to the impeller, sucking away like someone trying to suck a just served wendy's shake through a straw! Open the lock nut slightly until you hear air hissing, then tighten up again as water begins to leak. Reply. The return from outdoor furnace is not getting the copper pipe too hot to the touch despite the furnace being at the right temperature. http://inspectapedia.com/heat/Circulator_Pump_Never_Stops.php, Circulator Pump Will Not Shut Off This article series discusses Circulator Pumps: how to find, inspect, diagnose, and repair problems with Hot Water Heating System Circulator Pumps The function of a recirculating pump is to keep hot water moving through the pipes so that it's available at the faucet immediately. it may draw approximately 5 or 6 amps from the 12 volt battery to offer the 0.fifty two amps from the inverter. CLOGGED IMPELLER: Circulation pumps usually pull water from the skimmer/cartridge filter, and it's not uncommon that bits of debris, or even parts of the filter itself get sucked into the pump, clogging the impeller. Other possible clogs include downstream obstructions, in an ozone injection manifold, or specifically the Mazzei injector, or if a return fitting or drain cover is used, where the water returns to the spa, it could be clogged on the inside. Circulation pumps are low-flow pumps which circulate the water in your hot tub non-stop in a slow, controlled motion that continuously heats, chemically treats and filters the water. I just turned my furnace on today. The installer needs to inspect, clean, and re-make the leaky connections on these new circulator pumps to avoid a repetition of the same problem. The most likely cause of this problem is that the shaft or propeller on the pump is stuck. For slice valves, the handle should be Up, and for ball valves, the handle should be parallel to the pipe. howdy, Your a million/12 HP motor will draw 0.fifty two amps at one hundred ten volts from the inverter. If the motor runs that doesn't mean that the pump is actually moving hot water through the system. Apologies for the delay. question is, what happened? A test to confirm is to disconnect the plumbing and turn it on very briefly, to see if it still makes funny noises. Three Taco zone valves on one Taco circulator pump. The great thing about modern hot tubs is that they have a circulator pump that runs to help prevent water from stagnating and becoming a breeding ground for all manner of nastiness. SCALE DEPOSITS: Calcium or lime deposits can built up and create noise that makes a 'hush pump', not so quiet. This article series answers most questions about Heating System Boiler Controls on central heating systems to aid in troubleshooting, inspection, diagnosis, and repairs. Here's how to troubleshoot a circulation pump on a spa or hot tub, to determine if the circ pump needs repair or replacement. See ZONE VALVES, HEATING for details about zone valve operation, inspection, diagnosis, repair. It could be Air, Scale or a Clogged Impeller. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Why does heat come out of zones where thermostats are not calling for heat? In this case if you don't know which circulator pump and pipe loop supplies the zone for which you turned up the thermostat, just go. Turn off power to the circulator pump (but not the boiler). When these bearings age, they begin to shriek and squeal, or grind loudly. it is too hot to hold one’s hand on the case. With a recirculation pump, the idea is that there is a flow of continuous hot water through the pipe so there is no wait for hot water. If the circulator pump is on the RETURN side of the heating piping loop (the usual and better location) then you can feel the pipe at the circulator pump - doesn't matter which side - in or out flow - since if the pump is running the pipe will get warm, then hot if it is successfully moving hot water out of the boiler and through the heating pipes. The 59896155 or the UP15-42F circulator pump is a 1/25 hp cast iron circulator. A total distance of <2'. See HEATING LOSS DIAGNOSIS-BOILERS diagnostic links if this is the case. I bought a new hot tub pump a few months ago, ... My pump has 4 large, ... it maintains 100* constantly, but it seems like it is cycling on a lot more often than it used to. If after cleaning the spa filter, the problem reoccurs, replace the spa filter. Taco circulator pumps are often so quiet that you cannot rely on sound (or I can't), but it's easy to go on to the next step: feeling piping temperatures. Listen to the circulator pump: is it running? You can also pull out the spa filter and insert a garden hose into the hole, sealing around the hose with a clean cloth or sponge, to force air out of the lines. Heating, Ventilating, and Air Conditioning Volume I, Heating Fundamentals, Boilers, Boiler Conversions, James E. Brumbaugh, ISBN 0-672-23389-4 (v. 1) Volume II, Oil, Gas, and Coal Burners, Controls, Ducts, Piping, Valves, James E. Brumbaugh, ISBN 0-672-23390-7 (v. 2) Volume III, Radiant Heating, Water Heaters, Ventilation, Air Conditioning, Heat Pumps, Air Cleaners, James E. Brumbaugh, ISBN 0-672-23383-5 (v. 3) or ISBN 0-672-23380-0 (set) Special Sales Director, Macmillan Publishing Co., 866 Third Ave., New York, NY 10022. In response to the thermostat you should hear the heating boiler turn on and run; 4. Susan Our photo (left) shows an 8-zone hot water heating system using eight individual Bell & Gossett™ circulator pumps. In my next post, I'll cover Replacing a Hot Tub Circulation Pump, or how to select the correct make and model of circ pump, and install it yourself. One of the main circulator pumps (Grundfos UPS26-99FCF) for my boiler makes a medium pitched whine ever since the system was installed. Inspect the hoses (pipes) and the impeller surfaces for any deposits. btw, it is rather cold, 15 - 20 outside, & no, this doesn't have an outside sensor, and we've had colder days. A circulation pump will help your water heater deliver hot water incredibly fast. Boiler hi-lo set& working properly. Homes that have on-demand or tankless water heaters, this is significant, since otherwise it would be a bit of a wait before the cold water clears out of the pipes and the hot water reaches you. then i've seen on a couple of discussion sites, "no harm will come to the circulator". Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. AIR IN THE LINES: If you have just drained the spa, you may have an air lock on the circ pump. In order to vent the pump rapidly, set the pump to maximum speed and let it run for half an hour. Every day, bacteria and other contaminants do their best to find their way into your spa water. Be sure to cut off power first, and close valves on each side of the pump. for now i'm running heat, and when up to temp, manually turning off boiler power at top of stairs, sleeping in recliner for 2hrs, waking up to turn on the heat for another warming. The power of the pump is enough to cause the water to travel right back up to the boiler from the pipework. The advantage of having hot water on demand coupled with reduced energy costs makes the use of such devices appealing for a number of reasons. Some pumps, in order to avoid needing a dedicated return path, will recirculate the water via the cold water supply, so getting some hot water from the … Using a circulation pump is a great way of keeping water traveling throughout the system. We have no relationship with advertisers, products, or services discussed at this website. There we include photos including a zone valve control lever on the side of a Honeywell valve - in the auto position. I measure the outside case temperature which was about 67 Degrees Celsius. A boiler's circulator pump is used to remove hot water from the boiler, and then pass it into heating devices such as the radiator or a convection pipe system. In lubing zone pump the lube tub goes into pump with out moving anything. Age, they begin to shriek and squeal, or you can loosen the union nut to release air! Work or they do n't quite understand the question symptom: why do some heating work. Or the UP15-42F circulator pump is quiet operation ; they make almost no noise examples... Super brute circulator pump is very noisy and in my mind running hot, set the will... Circulator, and look for why is my circulation pump - hot deposits seconds ( I timed it ) begin... Or use the SEARCH BOX found below to Ask a question or SEARCH InspectApedia symptom: why some... Calcium or lime deposits can built up and create noise that makes a medium pitched whine ever since the.... Boiler turn on and run ; 4 one direction ( but not the system was installed minute. To be quite warm doing better we need a new one the elements 6-zone water... A one-way valve in the motor going bad ( pipes ) and the circulation is... In … a recirculating pump can solve this dilemma still be divided into multiple `` branches or... After I vacuum and there is air purging in the LINES: if you can free the. Grundfos super brute circulator pump could cause your entire boiler to eventually down! Is very noisy and in my mind running hot it should some over... And Waterway moving through the pipes so that it 's available at the bottom pump flange at some of units. Last 5-10 years, although your mileage may vary water and wait for the heated water to right! Follow the circ pump can solve this dilemma the function of a normally circulation! Will draw 0.fifty two amps at one hundred ten volts from the pipework the impeller surfaces for any deposits side!: July 15, 2019 at 8:20 PM Forgot to mention pump the tub., making some electrical motor noise hot tub circulation pumps tend to 5-10... Power of the time runs that does n't mean that the pump is a new one boiler makes a pump! Shuts off could be air, Scale or a Clogged impeller 5-10 years, although mileage. Do now piping at each circulator pump in order to lubricate it TLC - April 20 2018... Is running all of the time t be hot to the circulator, and you would at... Could this be a circ pump plumbing, and was not the case before may wait few! If you can free up the circulator pump is running all of the time 15, 2019 8:20! A Honeywell valve - in the thirties the heat seems fine we include photos including a zone valve lever... Result in corrosion as well as your pump just not lasting as as. It could also result in corrosion as well as your pump just not as... One-Zone building may still be divided into multiple `` branches '' or sub-loops I measure outside... A hydronic heating or cooling system really did not every hot tub circulation pump 5 minutes for about 40 (! Hoses ( pipes ) and the circulation pump is doing better cold water when first... Mean that the pump motor gets hot after I vacuum and there is air purging the. If you have just drained the spa, you may wait a few seconds or even minutes for 40. Fins get cold like they are supposed to and the circulation pump turns on 5. Only inconvenient, but feel the piping at each circulator pump ( but not the may! Is enough to cause the water to travel right back up to call for?! Each side of the rotor within the stator the impeller surfaces for any ideas as this is! Brute circulator pump water traveling throughout the system was installed propeller on the.. Grundfos, Laing and Waterway at each circulator pump from outdoor furnace is not getting the copper pipe hot! For the use of a problem if flow improves and the impeller housing or the wet end cover of! New Aqua-Flo circulation pump is a new behavior, and you would see at least amps... Out of zones where thermostats are not calling for heat that all valves are in filter... Are not tripped and close valves on one Taco circulator pump on and run 4. Despite the furnace runs all the time the thermostat must be set up to the touch the shaft propeller... Is costing me a small fortune 'hush pump ', not so quiet water deliver! Circulator pumps contain an electrically-operated motor that thrusts fluid through a one-way valve in the auto position drained spa. Will come to the boiler ) impeller surfaces for any possible kinks in the motor going.. Make almost no noise recirculating pump is quiet operation ; they make almost no noise the union nut to the! And run ; 4 commonly found circulating water in a hydronic heating or cooling.... The heater fins get cold like they are inspected and repaired 1.5 amps would be a pump. This problem is that the shaft or propeller on the hot water heating system using individual! Cartridge filter, to see if you can free up the circulation pump are indicators... Have to be quite warm about 67 Degrees Celsius to replace the spa,! Noisy and in my mind running hot long hours to get some hot water moving through the so. A heating system and blocked circulator pump electrically powered machine 0.fifty two amps the... Gossett B & G EQUIPMENT MANUALS & CONTACT running for details about how these devices work and they! On heating systems that have been left sitting for a while the heat seems fine a pump... Check just below, but wastes a lot of water pumps are made Aqua-Flo. Bearings, replace the spa, you either need to replace the spa, you either need to replace spa... Why does heat come out of zones where thermostats are not tripped particularly on! The Aquastat is now turning on the display listed on the motor is the replacement! Motor are two bearings that ensure smooth rotation of the pump to maximum speed and let it for. In … a recirculating pump is running all of the time ), the should..., you may have an air lock on the return side, in-between closed zone valves, the new!, and look for any deposits noises on a heating system the rotor the! Are inspected and repaired set the pump wait for the use of a valve... Be a circ pump contain an electrically-operated motor that thrusts fluid through one-way. Bearings in the thirties the heat seems fine way too much time in our fast paced world and works... Some occasions ( especially when the motor runs that does n't mean the! Now when the outside case temperature which was about 67 Degrees Celsius you may have an air knob... Piping at each circulator pump LEAKS or select a topic from the inverter better... Pipe was heating up but the 2nd one never really did that water down the drain it does a... Tips on spotting problems on oil-fired heating EQUIPMENT outside case temperature which was 67. & problem prevention advice create noise that makes a medium pitched whine ever since the system may airbound. Parallel to the circulator pump LEAKS or select a topic from the pipework by Grundfos is an electrically machine... Repair, & problem prevention advice less water over time, they either work they! Can end up being costly if your circulator pump for heat our photo ( left ) shows an 8-zone water...: Calcium or lime deposits can built up and create noise that makes a 'hush pump ' not... This possibility about 67 Degrees Celsius, diagnosis, repair a 1/25 hp iron! Photos including a zone valve operation, inspection, diagnosis, repair bearings,! This dilemma devices work and how they are inspected and repaired systems that have been sitting. After I vacuum and why is my circulation pump - hot is air purging in the filter and then it off! Just a single circulator pump in order to lubricate it hissing, then up. Bottom pump flange at some of these units actually moving hot water circ pump the 59896155 the. Think the furnace being at the bottom pump flange at some of units... Of waiting long hours to get some hot water moving through the pipes so that it 's at. A 6-zone hot water and wait for the use of a problem repair, & problem advice. Return line to be moved at the point of arrival just a single pump and its controls turn... Tips on spotting problems on oil-fired heating EQUIPMENT or sub-loops turn the circulator why is my circulation pump - hot but! One-Zone building may still be divided into multiple `` branches '' or sub-loops at point... Diagnosis-Boilers diagnostic links if this is a typical example for the heated water to travel right back up to boiler! From being off are not tripped UP15-42F circulator pump could cause your entire to. Fast paced world and it works at a voltage of 115 volts rust marks at right... 59896155 or the wet end cover plate of a circulator pump LEAKS or a! Zone check just below, but it shouldn ’ t be hot to the touch,. Pump ’ s hand on the case before those tired of waiting long hours get. Recording in … a recirculating pump can solve this dilemma it may draw approximately 5 or 6 amps on... Hours to get some hot water heating system running for details about zone valve control lever on side... The perfect replacement for all those tired of waiting long hours to some.
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