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When boiler is on, and pipes hot, the zone valve is very hot, and much hotter than the other taco valve on the system. PLUMBING NOISE TYPE CHECKLIST - disconnect andlabel the zone valve wiring connections - with POWER OFF This is the only one of the four models in this series that is a normally-open zone valve. position. @Anonymous, PLUMBING NOISE DIAGNOSIS & CURE Ali contain dissolved oxygen in the system water. i think they share the same circulator pump. Turned up thermostat - got heat and no more noise. All this works fine. You can know that the valve is open if hot water is felt in the pipe on the output side of the zone valve. Why add a zone valve? If the zones do NOT heat any rooms with plumbing you may be ok. 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. 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. 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. We discuss that in this article series. Anon: We have problems with the valve motors quitting (after about a year) and have to be replaced. See if you can pin down the noise source precisely. InspectAPedia tolerates no conflicts of interest. 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. Also, can the zones valves be installed on the return side of the boiler instead of the supply side? - Honeywell V8043D ZONE VALVE INSTALLATION GUIDE [PDF]. I wonder what the rating on the transformer is? 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. However the boiler fires fine and must be getting signals fom other valves within the boiler itself. Thank you for a helpful question on the reliability or quality of Taco vs Honeywell zone valves and actuators. - re-fill the heating system (assuming it's a water-only system) We welcome your further photos, comments, questions. "Cut" pipe, I interpret conceptually, since physical "cutting" or sawing isn't necessarily required if instead there are threaded fittings that can be unscrewed. WR-1311 type zone valve that uses current both to open and to close the valve. Since we have no idea what type of noise you're hearing, please first look at this article 2) I have an overheated Taco zone control valve, that is always hot, even when the boiler is off and water temp in it is down to 100 degrees with cold pipes. A of motor switch makes with contact 4 then breaks the If the failure is the actual valve and not the motor then to repair these you'll need to (Fig. I'm unclear what kind of heat we are discussing. 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. holding circuit stopping the valve in the closed position. @Trevor, 271 and other complaints about the TACO 500 series and I've seen kudos and praise of the TACO ZVC series zone valves. Typically the zone motor or actuator, (properly, the "zone motor assembly") including the White Rodgers models can be removed without interfering with piping (Fig. How do you check a zone valve to see if it is working? When room temperature is reached the thermostat applies power to the valve and it closes, cutting off fluid flow. "Complaints" are anecdotal reports, not peer-reviewed expert research on failure rates. Zone valves have no trouble operating in that pressure range. circuit for starting burner and/or circulator). B of motor switch opens (breaking auxiliary circuit), and side replacing boiler zone valves (have boiler serving 8 condominium units), which is better: taco zone actuator or Honeywell mechanical valve? 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. what can cause long delays in my hot water heating system actually having heat coming out of the registers? -, I turned my thermostat right off and the valve cooled slightly to warm to touch but still makes humming sound - But I've not found that data available to the public. If you give us the zone valve brand and model we can research further. I think that this could cause extra heat build up in the motor and cause premature failure along with more power usage. 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. Dennis, I don't know. The photo above shows a bank of six zone valves controlling heat distribution in a large home. which may help with your question. thermostat calls for heat, the valve motor is energized and hydronic systems. 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. Jay contain dissolved oxygen in the system water. thermostat is presently off and it is possible the building heat has just been turned on for fall -. Does the pipe need to be cut to install a zone valve. 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. Have a boiler with three zones, two for upstairs, one downstairs. On 2022-03-01 by Inspectapedia Com Moderator. (open the boiler drain, using a hose to direct water to a safe drain location) Is this a pretty easy fix for the homeowner? 1. responds to a thermostat's call for heat The side 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. convenient removal of the entire zone valve unit. As I noted, unless the valve mechanism itself is damaged, you can just change the power head - leaving the actual valve assembly in place. but if it's the valve itself I'd expect to turn off water and remove pressure from the zone. While typical indirect water heaters use a heating loop encompassing a circulator pump and check valve, some systems may use a zone valve in this piping loop that first opens to let hot water flow though the piping loop (boiler to water heater coil and back to boiler), and second, when the valve has opened, it turns on a circulator pump to cause water movement. The room temperature is 22 C and yet the thermostat is down all the way. The motor sits atop and operates a mechanical shaft that, by rotating, opens and closes the zone valve in response to a call for heat from the thermostat. At times it seems to be working normally; but at other times It will not call for heat until I turn the thermostat up for another zone valve. All radiators have thermostatic valves to control the heat in individual rooms. If the noise is gurgling water sounds there may be air in your heating water piping; I'm have 30 years of maintenance experience changing pumps, motors, valves, piping systems, etc., though it is mostly heavy indusrial. The contact arrangement is constructed so that when the shaft Is your boiler also making domestic hot water via tankless coil or an indirect water heater? boiler) and a single circulator pump (usually located on the return end of the hot water piping close to the heating boiler). i have no idea the close water pressure test for the zone valve by the manufacturer. 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). Thanks for a helpful "sticking" zone valve repair question. And about using a normally-open vs normally-closed zone valve: it depends on the application; for example some hot water applications require the valve to be normally open. Zone valves and Taco circulator pumps are, most-basically, associated with hot water heat delivered through radiators or baseboards or convectors. Sketch (left) courtesy of Carson Dunlop Associates. 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. My boiler system has White Rogers 1311-102 Zone-A-Flow valves. @Carole, IF the motor is hot and nearby pipes are cool then the motor itself is seized and perhaps electrically unsafe. Nikki So that's normal. Somewhere, logically, yes. Not for use with oxygenated water, The heating system installer or service technician addresses this heat imbalance by fine-tuning the volume or the rate at which heating water is delivered to different building areas. 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. dissolved oxygen, which is found in systems that have a Please let us know if you have additional questions. NC - Normally-closed, and use a signal to open the valve is it the actuator or could it be air-block? Also see 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 - cool down the heating system How do we know that a zone valve is working? Is this a residential building? Integral end-switch WHITE RODGERS 1311 ZONE VALVE INSTRUCTIONS [PDF], On 2021-05-18 by Jon Green - two wire thermostat vs White Rogers 1311-102 Zone-A-Flow valves. The voltage will sag, the current will go through the roof, and you'll burn the windings on those tiny synchronous motors. When thermostat is satisfied, the valve motor is again energized. I use the word "register" to refer to a warm air outlet - a furnace heating system - is your heat a water-to-air heating system? I hope this helps. dissolved oxygen, which is found in systems that have a and the Could be a bad circulator, a zone valve not opening, or air in the heating zone piping. - op cit. You'll save significantly just by dropping the thermostat set temperature. I have no need for heat at the moment just possibly overnight - I am on the third floor - Should I move the switch from auto to manual on the zone valve. If your heating system is giving a loud BANG when the zone valves open or close (and circulator starts or stops) take a look at the location of the zone valves. 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. She or he does this by installing and adjusting manual or automatic zone balancing valves or zone flow control valves of various types. 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 ). It's likely that both Taco and Honeywell have failure data for their products based on their own research, on field reports, or both. can be replaced without removing valve body from line. Dennis: thanks for the follow-up. Do i have flow issue. Your advice would be appreciated. See AIR BLEED VALVE INSTALLATION The risks of turning off heat completely, besides my previous warning about not getting all the water out, are that you freeze up plumbing somewhere. holding circuit to prevent the valve from stopping part way Zone valve bad?? Is reached the thermostat cuts off power and the valve closes (by spring pressure) cutting off fluid flow. Watch out: for conditions that could contribute to zone valve failure. 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. You'll want the zones to run occasionally to protect against freezing. Can I just cut out the old actuators and install the new zone valves on my own?