inside the valve to deteriorate and eventually fail. Have a boiler with three zones, two for upstairs, one downstairs. by Inspectapedia Com Moderator - how to install a zone valve. Could be a bad circulator, a zone valve not opening, or air in the heating zone piping.
If the valve is dripping from the valve assembly or motor it's shot and needs replacement. That means "interrupting" or cutting the pipe to place the valve in the path of water flow. They seem to always be very warm/hot. By locating the circulator downstream from the return-side zone valves - that is, between the zone controls and the boiler, the impact of the pump start-up on the zone valve is reduced. hydronic systems. should I consider replacing the valve or turning on the heat to clear the system and then turn it down? On 2020-12-16 by (mod) of the motor revolves 90 a new set of stationary contacts makes I dont know if I need to depressurize my system or drain it before I do any of that (or how to do those things, but would love to save my self hundreds to thousands of dollars from doing it myself), @Jon Green, Thanks for pointing out the operation of the WR-1311 Zone Valve @Carole, The zone valve (Honeywell) which feeds the upstairs kitchen/dining/living/bath (large area) is making noise, overheating, and not opening when the thermostat calls for it to. which may help with your question. Not for use with oxygenated water, NC - Normally-closed, and use a signal to open the valve HEAT WON'T TURN OFF, I have my thermostat turned down lowest it can go but the furnace keeps coming on, It heats hot water. frequent source of make-up water, causes the rubber plug What is the point of this valve in the extension radiator loop as it just seems to get a signal to open from the controller, take a few seconds to open and then stay open until the programmer switches it off and the spring closes it? boiler) and a single circulator pump (usually located on the return end of the hot water piping close to the heating boiler). Good installation details install a zone valve on the return side of the heating piping loop where it will be exposed to lower and thus less stressful temperatures. - Lisa, Most likely you have My understanding is that the orange is normally intended as a feed to tell the boiler to fire. Why would anyone want a valve like that, instead of a spring or mechanism that just turns the valve automatically to the off position when the thermostat turns off? models permit the sequencing of auxiliary equipment. holding circuit to prevent the valve from stopping part way If the valve spins but doesn't open I suspect the motor shaft is broken - in which case it might be possible to open the valve using the manual latch if your model has one. Indeed when your boiler (hot water heating system or "hydronic heating boiler") is also used to make domestic hot water (for washing and bathing) the boiler will run form time to time to keep its temperature high enough to produce domestic hot water. The normally closed valve only uses power to open the valve when heat is called for, .The application that we have is residential, but was originally installed when the house was built 29 years ago. Keep me posted, On 2021-05-24 Many homeowners can do such a repair. You can know that the valve is open if hot water is felt in the pipe on the output side of the zone valve. Thanks. What is the downside to installing a 4043 zone valve backwards? I got zone valves, Honeywell thermostats, Onrom relays, and a Taco pump Why is it taking so long as much as 30 minutes, On 2022-01-09 by Inspectapedia Com Moderator - different pipe noises mean different things. I have no need for heat at the moment just possibly overnight - I am on the third floor - and I noticed that the Manual Operating Levers on the actuators were in a half open position. While going through the detailed sequence in the operation of the heating boiler, watch for and inspect the condition of the heating - HONEYWELL V8043D ZONE VALVE INSTRUCTIONS [PDF], Details on the risks of damage or component failure from dissolved oxygen in heating system water as well as suggestion on avoiding those hassles are now found. An alternative, and the one that I use, is to keep all 5 zones working, but set the thermostats for the three unused areas to a lower than usual temperature, just high enough to avoid freeze-ups - say 45 F. However, the 2 radiators in the extension are tapped off the 22mm feed to the main house and have a 2 port Honeywell Motorised Zone Valve in the loop (not in the 22mm). I'm have 30 years of maintenance experience changing pumps, motors, valves, piping systems, etc., though it is mostly heavy indusrial. - zone valve opens but boiler doesn't turn fire up. Use this valve in hydronic systems which DO NOT Nikki I have made the mistake of removing and tossing a part whose function I couldn't understand. The This was a professional installation not DIY. But if you see a zone valve with the cover off (photo at left) that may be a clue that the valve has been having problems with jamming or sticking - someone left the cover off to try to keep the valve a little cooler. @Anonymous, through its cycle if the thermostat is changed to the satisfied breaks the holding contact. If the zone valve failure is in the actuator motor, that's a pretty easy repair as the cover can be removed, the motor removed, and a replacement installed without having to do any plumbing work. The photo above shows a bank of six zone valves controlling heat distribution in a large home. - Dennis. There are no special heating needs or requirements. 271 and other complaints about the TACO 500 series and I've seen kudos and praise of the TACO ZVC series zone valves. On 2022-03-01 by Inspectapedia Com Moderator. I'm not aware of temperature-tolerance differences among the two valve descriptions you cite, and am confused by the query: in my limited experience a heating zone valve is opened or closed by the room thermostat. If not then I suspect the zone valve end switch isn't working. by Trevor - how to replace Sparco PowerTrack zone actuators broken into pieces. Zone valves and Taco circulator pumps are, most-basically, associated with hot water heat delivered through radiators or baseboards or convectors. Where can I find a schematic of the main board of a Taco ZVC406 6 zone valve control?? Check to see if the circulator is being turned on. Is reached the thermostat cuts off power and the valve closes (by spring pressure) cutting off fluid flow. At any water heating equipment, such as a heating boiler or a water heater, water hammer risks an additional hazard besides noise: water hammer can cause leaks at the temperature/pressure relief valve. The In that case if the circulator runs hot water will circulate. This contact provides a by (mod) replacement Sparco PowerTrack zone actuators from Honeywell. The installer surely had a reason for the "normally-open" approach. ZONE VALVES, HEATING at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. This is the only one of the four models in this series that is a normally-open zone valve. You'll want the zones to run occasionally to protect against freezing. Stuck Zone Valves: Older models of some zone valvessuch as these Flair valves are perhaps more likely to be "stuck" either open (you'll have heat in that zone) or shut (that zone won't heat). Andre said: - cut out and sweat in new valves I have 3 separate zone valves in my home. what is the hot water pressure for heating system normally? Is this a residential building? Just before the valve reaches the full-open position, On 2021-01-21 by (mod) I've seen some complaints about the TACO No. i think they share the same circulator pump. If so that'd be a reason it still runs from time to time even if you're not calling for heat. All this works fine. Heating water piping in a building, particularly where hot water baseboard heat is used, may be divided into separate heating zones (different floors, or different areas on a single floor) to Does the pipe need to be cut to install a zone valve. Are there some special heating needs or applications? Good practice locates the zone controls and circulators on the return side of the hydronic heating loop. The one problem zone valve opens when I adjust the thermostat but the hot water only flows to the valve and a little beyond then the line starts cooling down and I have no heat in that area. Ali the valve in the open position when side A of motor switch Thank you for a helpful question on the reliability or quality of Taco vs Honeywell zone valves and actuators.
I don't like leaving it like that, so I put it there at night when the house gets cold, put it back to normal during the day. thermostat is presently off and it is possible the building heat has just been turned on for fall -. - cool down the heating system Finally, for freeze protection advice for the building, see WINTERIZE A BUILDING ( a link I'll add at the ARTICLE INDEX the bottom of this article ). convenient removal of the entire zone valve unit. You'll find articles on all of those in the article index. IF the motor is hot and nearby pipes are cool then the motor itself is seized and perhaps electrically unsafe. A thermostat wired to operate a normally-open zone valve (NO valve) will need to be re-wired if it supports operating a normally-closed (NC) valve. @Anonymous, Three out of the four zones are working correctly. I'm sure it needs to be replaced. TACO ZONE CONTROLS WIRING GUIDE Our photo at left shows a Honeywell (TM) zone valve installation. Here is another pic of the system, any insight someone could provide on changing my zone valves and the steps I need to do to pull it off would be so appreciated! Just stopping current to the "ON" position will do nothing as the valve stays open. The heating boiler water is passing through the valve and the valve is open. 3. turns on the circulator pump once the valve is open
Honeywell V8043D - normally OPEN (your valve) PN 4000396014 has NO END SWITCH - the installation presumes that the thermostat or other control is activating the circulator pump. It's possible that there is air in the noisy zone, or that the zone valve actuator motor is buzzing and failing, or that a relay is buzzing; The water temperature inside the indirect fired water heater tank is sensed by a thermostatic control that causes the hot water tank's contents to be re-heated as needed, typically by turning on a circulator pump that moves hot water from the separate heating boiler through the coil in the bottom of the water heater. As the - op cit. Heating System Zone Valve Failure Rates, Failure Data, Honeywell vs Taco Any advise is appreciated. For other readers, the installation instructions and wiring diagrams for this zone valve are at The valves cannot be moved to return lines without a lot of work. When the circulator pump is running you should be able to feel the heating pipe on the inlet and Outlet side of a zone valve go from being cool or cold to hot. But yeah, there can indeed be a "left-over" control from discontinued equipment or devices. hydronic systems. 5 individual room thermostats. Dennis, I don't know. NO - Normally-Open, and use a current to close the valve Jay On 2021-05-13 by (mod) - diagnose zone that sometimes does not open. so all good. Will putting the lever in a closed position cause any issues? - get the air out of the heating pipes so you won't be air-bound Probably one thermostats at a time. Quick Fit actuator provides easy snap on and off connection
They are mounted on the hot side of the boiler. More diagnostic suggestions are at HEATING SYSTEM NOISE DIAGNOSIS https://inspectapedia.com/heat/Heating_Noise_Diagnosis.php, I have gas fired boiler laars mini therm jvs model and when one zone calls for hest boiler makes sound like plane passing by over the house but when two zones are calling for heat boiler runs fine snd the noise goes away. I wonder what the rating on the transformer is? Some writers opine that in some buildings we install a normally-open zone control so that " in the event of power failure or malfunction the suite won't freeze and bust up the plumbing and heating pipes." It uses a two-wire, 24-volt control circuit and requires a SPST thermostat. i have no idea the close water pressure test for the zone valve by the manufacturer. Honeywell V8043D - normally CLOSED PN 4000396013 has an end-switch that will be used to activate a circulator or circulator relay. When updating this article I'll be sure to include your helpful comment. Take a look at the wiring guides at But first check for a bad check valve on that zone loop: hot water could be circulating even when the zone motor is off. But if the zone valve problem is not the motor but the actual valve in the valve body - the parts that rotate to either allow or not allow hot heating water to flow through the piping, then what's needed is to cut-out or de-solder the old valve and put in a new one; that in turn also will require cooling down the heating system and draining the zone, the re-filling the zone after the repair, and then purging air from the system after that. (open-close) control of supply water for baseboard radiation, 2. opens to allow hot water to flow through the zone These valves require thermostats to send current to the valve to turn it on,, but then the valves require current to the opposite wires to turn the valve to the off position. It is possible to simply change the actuator heads from the D model to one of the other models - changing wiring and thermostats as appropriate, leaving the actual valve body installed. what can cause long delays in my hot water heating system actually having heat coming out of the registers? If you give us the zone valve brand and model we can research further. permit more detailed control of heat distribution in a building. The Honeywell V8043F has these same features. Also, can the zones valves be installed on the return side of the boiler instead of the supply side? If piping on the outlet side of the zone valve is hot then you can be pretty sure. I have a four zone one circulator pump hot water system. to have automatic control of heat in the location that the zone-valve-fed radiator(s) or base boards enjoy. Watch out: however, for wiring errors, short circuits, or a misbehaving low voltage transformer. So I can't imagine any way to install a zone valve without installing it somewhere on the hot water heat piping loop for the zone it's intended to control.
- Dennis. How do you check a zone valve to see if it is working? I have no experience with boiler systems but no how to sweat and do copper plumbing. Can't the module be changed out separately instead of changing the valve? See if you can pin down the noise source precisely. frequent source of make-up water, causes the rubber plug like 25psi? This article series answers most questions about Heating System Boiler Controls on central heating systems to aid in troubleshooting, inspection, diagnosis, and repairs. See AIR BLEED VALVE INSTALLATION And over time a relief valve that leaks can also clog from mineral deposits and - to put it technically - crud on the valve seat. keep us posted. circuit for starting burner and/or circulator). You can still drain and turn off 3 of the zones but you'll need a plumber to find the END of each of the loops you want to turn off - right where it joins a common return line. A typical design will include a thermostat on the water heater that will cause hot water from a physically separate heating boiler to circulate through the heating coil located in the bottom of the indirect-fired water heater. There's theory that the slightly lower temperatures give longer component life and that this location will reduce water hammer noise in the heating zones. I live in a condo and the zone valve was hot to the touch and made a humming sound - is this a problem? but at some convenient locations the installer joined several of those individual zones into one of two return lines - that's why you see just two hydronic heat (hot water) lines returning to the boiler. [The Honeywell Honeywell V8043 series zone valve is ] suitable for glycol/water mix up to 50:50 use in closed When changing the thermostat, there are some models that can be wired to operate either type of zone valve: normally closed or normally open. 1 value is for the basement apartment. Reply: Norby, Therefore a simple 2 wire thermostat will not work without a relay to send current to the off wires when the thermostat turns off, or a special thermostat that sends current one way when heat is on, and current through another wire to turn the valve off. I see the 5 zones going off the outbound pipe, but I only see 2 converging back to the intake. When room temp. inside the valve to deteriorate and eventually fail. Usually people don't go to the trouble of installing a valve or control unless it was needed. @Gene Lair,
thx, if I gently push on the valve the humming changes. There are also specific thermostats required for each type of valve. (Fig. In all cases, when the zone valve is fully open, an "end switch" inside the valve tells the heating system's circulator to begin operating, causing hot water to flow - drain off pressure and water from the lines enough that the piping in the area of work is empty (so it can be soldered) Zone valves on hot water heating systems: How do I choose & install a zone valve, how do I wire up a zone valve, and how do I troubleshoot, repair or replace a zone valve? potable water or steam. If those still leave you with questions, please let us know. calls for heat in a particular building area, the thermostat switch causes the zone valve to open, to permit hot water to flow through that zone. Just after the valve starts to close, side A of motor switch - disconnect andlabel the zone valve wiring connections - with POWER OFF On 2021-11-22 Thanks that's a very helpful question. The contact arrangement is constructed so that when the shaft Reader should make sure they have at least a 75VA transformer for the valves - 60VA for full load plus 20% headroom. It's a good system but we are trying to improve costs and new procedures develop with time. The hot water and CH (central heating) in the original house are provided via a 22mm feed from the boiler via a Dunsley Nutraliser to the house radiators and bathroom hot water. The F and G models of this zone valve include an end-switch to permit switching auxiliary equipment such as a water circulating pump. dissolved oxygen, which is found in systems that have a but if it's the valve itself I'd expect to turn off water and remove pressure from the zone. The temperatures of the circulating hot water are, in my OPINION more likely to be a factor in zone valve life. - Daniel, Zone valves we are using are a Honeywell V8043D 5080 normally open (held open by spring pressure). If you continue to have annoying water hammer banging when the circulator pump starts (or stops) consider changing out your zone valves to a slow closing valve such as the Taco #570. position. The room temperature is 22 C and yet the thermostat is down all the way. I want to replace them with more modern zone valves (was thinking the Honeywell 3/4 Sweat valves). Or see ZONE VALVE DIAGNOSTIC FAQs for help with diagnosing zone valve problems. If the failure is the actual valve and not the motor then to repair these you'll need to Can I just cut out the old actuators and install the new zone valves on my own? If the valve is open and you still have no heat in those zones and the circulator is - for sure - running, then in the ARTICLE INDEX see our advice on troubleshooting an AIRBOUND HEATING SYSTEM For that work, the job probably goes faster and easier when done by a trained heating service tech or plumber who is familiar with zone valve replacement. Turned up thermostat - got heat and no more noise. You'll save significantly just by dropping the thermostat set temperature. I'm unclear what kind of heat we are discussing.
Please find your question and my detailed reply now at the Reader Q&A section near the bottom of the article above on this page. Anon: Wiring details for the yellow Flair Zone-A-Trol valve shown above are given. Quoting the product literature: Easy servicing because the entire powerhead assembly Readers should also see inspectapedia.com/heat/Low-Voltage-Transformer-Test.php I have used, installed, and repaired both brands of zone valves since the 1970s; In the northeastern U.S. I have a boiler in an extension that provides hot water to the kitchen and extension. I took a look at the boiler.
boiler controls and safety devices (as required by ASHI 9.1.A.3 automatic safety controls). I have a zone valve dripping and when the thermostat turns on the zone valve spins and won't stop on open. The instructions don't say why but from my reading and field experience I warn that if you hook up a heating zone valve backwards, depending on several other variables including zone valve brand and model and type as well as water velocity there may be trouble: To be fair, not all banging noises originate at a backwards zone valve. When the heat in the subject his own has been off for a while and the baseboards and radiators are cool turn the thermostat all the way up. Could my circulator pump be bad although the other three zones are working? A separate loop of piping conducts water from a nearby heating boiler, through the coil in the bottom of the indirect fired water heater tank (thus transferring heat to water in the water heater tank), and back to the heating boiler. However if you are going to the trouble of rearranging or re-sweating zone valves at a hot water heating boiler, I'd see if it were possible to put the valves on the return side of the boiler - cooler water temperatures there may improve zone valve life. Here are some details: Honeywell, for example, says the zone valve " must be installed so that the arrow stamped on the body corresponds to the flow direction". The side Seems to be an unnecessary component in the system. Water hammer anywhere in a hot water heating system or in the building plumbing system (also a function of water velocity and valve closing speed. It's safer to refer to the F model but I found it listed both ways. switch makes with the holding contacts. We have no relationship with advertisers, products, or services discussed at this website. It will close when the thermostat shuts off. Please let us know if you have additional questions. When a zone valve is dripping from the solder or sweat connections it may be possible to repair it - but that'll usually require draining water out of the zone piping first. She or he does this by installing and adjusting manual or automatic zone balancing valves or zone flow control valves of various types. Typically the zone motor or actuator, (properly, the "zone motor assembly") including the White Rodgers models can be removed without interfering with piping But I've not found that data available to the public. (open the boiler drain, using a hose to direct water to a safe drain location) Not for use with oxygenated water, PLUMBING NOISE DIAGNOSIS & CURE In order to change out a White Rogers Spin on or Twist On Zone Valve do you have to turn off the water or can you simply take off and twist on the new one? zone valve opens but boiler doesn't turn fire up on one of my zones.
But a humming sound may mean that the valve's motor is jamming (needs replacement) OR that a nearby low voltage transformer is humming and will need replacement soon. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. However the boiler fires fine and must be getting signals fom other valves within the boiler itself. to the valve assembly. I think that this could cause extra heat build up in the motor and cause premature failure along with more power usage. @Jason, Here are other sources of banging noises in buildings: At WATER HAMMER NOISE DIAGNOSE & CURE we cite these other banging heating pipe sound sources. It's not clear to me that the added heat from the 40VA transformer wiring that powers this zone valve would normally be sufficient to contribute to the product's failure in the field. And this is not just an instantaneous short either - once those valves start going, they keep going as long as necessary. Since we have no idea what type of noise you're hearing, please first look at this article These include highly-corrosive water, improper pH, and water with a high oxygen content. (Fig. The voltage will sag, the current will go through the roof, and you'll burn the windings on those tiny synchronous motors. About the "why" of requiring electrical energy to close the valve when the thermostat is satisfied, I'm embarrassed to pretend to second guess WR's engineers who certainly know more about it than you or I, but maybe the idea was to make an inexpensive zone valve that would close more-reliably than a spring-operated valve. If the zones do NOT heat any rooms with plumbing you may be ok. The motor stops with See CHECK VALVES, HEATING SYSTEM for details. makes with holding contact providing a holding circuit. You can obtain the installation guide and ask questions of Honeywell at 1 (877) 663 0316 The water pressure inside of a hydronic (hot water) heating boiler - a building heating system - is typically 12 psi cold and somewhere under 30 psi when the system is at its most-hot.
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