taco zone valve control troubleshooting

2021/05/21

Get home building tips, offers, and expert advice in your inbox. My guess is that Rh or W1 wires are damaged somewhere inside walls and when it gets colder at night they lose the contact. The designer and builder of the 2018 Fine Homebuilding House detail why they chose mineral-wool batts and high-density boards for all of their insulation needs.

Chased the transformer wires to zone valves to ensure integrity, wires from the Aquastat are fine as well. Comment document.getElementById("comment").setAttribute("id","a9c8ddae2394264912341ea635ec92c5");document.getElementById("afe6277d1c").setAttribute("id","comment"); Save my name, email, and website in this browser for the next time I comment. Ive attached some pics for reference. When I use ecobee app standing next to the water heater and call for heat I see the zone valve opening and hot water starting to circulate. This may dislodge the gunk more easily, and allow the flowing water to "wash it out". problem is i have a thermo runaway on 1 of the zones, I pulled the thermostat and the radiators for that zone cooled down. The odds that the manual open feature on the zone valve is broken are in the 2% range, most likely its working well, but you have air or icing problems. What do you think could be issue and how could I fix it? zone 4inch Some Mod-Con boilers also require a T T call for heat to activate the boiler. Connect terminal 4 on ZVC to the other end switch connections on the zone valve. 120 VAC wiring must have a minimum temperature rating of 75C. I've just had 2 zone valves (Sunvic) fitted to separately control under-floor hearing in one room and the central heating in the rest of the house. In two of the rooms the thermostat is set a 63, but the heat goes up to 79. General Operation: When any thermostat calls for heat, the appropriate zone valve is energized, and the yellow light goes on. I HAVE 8 ZONE VALVE DO I TO BLEED THEN EVERY YEAR AND WHAT THE BEST WAY, On 2016-10-20 by (mod) voltage drops when 7 zone valves are on one transformer, Good question, Andre.We often read about people hooking up too many zone valves to a single transformer, overloading it. I knew something had to be causing these failures & that it was not just the contactors that where failing so I started investigating & I figured it out that the end switches where the culprits.I found 2 new contactors on line & also purchased new Taco 571 valves. turned down. - to connect to the new zone valve, and a push-to-connect to copper fitting for (probably 3/4") copper heating zone piping on its other end. 2022 The Taunton Press, Inc. All rights reserved. My serviceman has ordered new zone valves but without them, my boiler is heating my house just fine in 18 degrees below zero. IF you can't move the mechanical valve parts then the zone control needs replacement. This completes a circuit between the thermostat, the zone valve transformer and the heat. I also checked the 28V transformer although I knew it cannot be the issues as it supplies power to both zones. Problem: No heat in a zone or room of the building. Thanks everyone for the info.

I have a 2 zone heating system (3 if you include the hot water). 0000169121 00000 n If you mean the zone valve: it's normally fully open or fully closed. 0000058266 00000 n With the t stat. All switching relays are ul listed, and are compatible with conventional and programmable thermostats. - M.K. In this case, wire the Main Boiler End Switch to T T input on the boiler. With a goal of getting tools into the hands of more women, this new web service enables people to set up consultation calls with women and nonbinary pros on a variety of home-construction projects. What's a typical frequency of having to replace these (assume our water is pretty moderate -- neither overly soft, nor overly hard). Connect 3 on Master zone control to 3 on all Expansion zone control(s). I have a 3 Zone system and a brand new thermostat on this zone and the other two zones respond when I call for Heat but this one doesn't. 0000040627 00000 n Is there any danger to turning the knob (thumbscrew) too far to the left or right? This is a one circulator system. 0000119482 00000 n And one on my central heating? Problems of all kinds.Heat not working. What gives? 0000032194 00000 n The thing is a total POS and needs to be replaced but I just bought the place and will have to limp along with it till next year if it lasts. 0000050722 00000 n I would be hiring a professional to remove the radiator, I will not be undertaking anything that I don't think I could handle. Most of the time this is not a big deal, usually zones are set to temps that are fairly close &no onenotices a few degree difference. More adjustments are available when using the Taco eLink mobile app. On 2016-11-29 by john a - wrong voltage at the thermostat? If in doubt as to whether a particular substance is suitable for use with a Taco product or part, or for any application restrictions, consult the applicable Taco instruction sheets or contact Taco at[401-942-8000]. 8 0 obj <> endobj xref 8 51 0000000016 00000 n Question: are there zone valves that resist damage from dissolved oxygen in hydronic heating system boiler waterDenys Picard said:Honeywell warns that makeup water feed to a boiler may damage the rubber plug of Zone Valves 8043 and make them fail.Are they zone valves resistant to dissolved oxygen from makeup water feed? 1995-2022 MH Sub I, LLC dba Internet Brands. Will I have to start out with a smaller furnace so it don't cycle on & off to often and damage the furnace or can i buy the correct size for the entire home? The other end connected to the old thermostat. This site is protected by reCAPTCHA and the Google. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. Thank you, Its fairly easy to test the valve with a multimeter, and if the test reveals an internal electrical problem, you can replace the head without disturbing the valve itself. pump magnetic contactor.

They cost about $15. Does this appear to be my problem now, that I need a new zone valve motor for the lower level. ValveThe issue can be in the motor - that can be replaced without removing the valve body -or in the valve assembly itself.Pull the motor and see if you can easily rotate the valve stem. I don't understand what the higher bid contractor is actually thinking; Why would a boiler over-heat; it is controlled by its aquastat settings. Just not sure that is the best permanent solution.

TACO WILL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF ITS PRODUCTS OR ANY INCIDENTAL COSTS OF REMOVING OR REPLACING DEFECTIVE PRODUCTS. But, I don't know what the best solution is. Here's an example of a zone valve that connects by providing female NPT threaded connections. So it looks like it is the thermostat to transformer/ zone valve issue. I was wondering If I could replace a 40004850-001 Honeywell end-zone valve with some other replacement Zone Valve. Circulator Output; Secondary / AUX 1 (120 vac): Circulator Output; Primary / AUX 2 (120 vac): Circulator Output; Priority Zone / AUX 3 (120 vac): PA01-V ZVC406-5 with 5 Zone Valves & Indirect DHW; Supply & Return Headers, PA02-V SR506-5 with 5 Zone Circulators & Indirect DHW; Primary/Secondary, PA03-V High & Low Temp Temperature Zones + Indirect DHW; Primary/Secondary, PA04-V Oil Fired Boiler with Tankless Coil; Supply & Return Headers. To sort that out we need to know both brands and to look at their wiring instructions. David:If the valve ticking stops after the system has cooled down I suspect it's thermal contraction; sometimes using plastic noise reducing pipe mounts can reduce or even eliminate that problem.If the zone valve is ticking continuously and never stops that sounds like a failed or jammed zone motor and the valve head probably needs replacement. It's hard to be 100% sure, since I can't see all of the piping, but it looks like you have four pumps on the return side and four flo-checks on the supply side.

Joe,If nobody changed the wiring then more likely the valve is jammed open or its motor has failed. "SharkBite Universal fittings have a maximum temperature of 200F maximum pressure 200 psi when used on copper pipe.". The odds that the manual open feature on the zone valve is broken are in the 2% range, most likely its working well, but you have air or icing problems. The t stat is a new Honeywell type that looks like the old round ones but has no mercury switch in it. One of the other zones gets minimal and the 3rd I can't seem to get any heat to -. The heat anticipator has no bearing on the operation of the zone valve. On 2016-06-06 by (mod) thermostats not working right - shorted wires? See section 7 for more information on the Taco eLink mobile app. My system has "flow control" valves directly above each circulator on the supply side ( 3 zones total). To connect a zone valve without soldering copper (sweat connections), you'd need to buy a valve that uses threaded pipe (in the U.S that's NPT threading) connections. However if the Taco zone valves are quite old it'd make sense to install new units for reliability. Jack Denis:This may help:On a call for heat the thermostat is acting as a simple "on-off" switch. I've tried replacing the head and still nothing? Boiler Sensor:A boiler supply sensor is required for either indoor or outdoor reset. I think the issue is that the valve doesnt completely close, so hot water bleeds through this zone when other zones are fired. Apologies for the delay. Called hvcc people back and they are now telling me after a $226 service call/estimate that all 3 of my Erie zone valves are bad and need to be replaced. When they cut the pipes to remove the old indirect tank and wired the new tank (by the way they piggybacked it on the panel cause there was not enough room) could that have somehow damaged my 3 zone valves (the 4th was for the old HW tank and pipe was capped but wiring was just left)? hi can any body hive zone valve installation working procedure ,where the location in heating systemsthanks shibu. I have moved the zone valve to manual so it is receiving heat when other zones fire the boiler. On 2016-12-22 by (mod) - too many thermostats & zone valves on one power transformer. The voltage will sag, the current will go through the4 roof, and you'l burn the windings on those tiny synchronous motors.

0000004357 00000 n And like you I don't rule out and intermittent poor Connection in the thermostat wires themselves. This unit is mounted on the furnace itself, vibration? Can I just disconnect the wiring from the therm. Component, but if the zone valve is still sticking open or closed the problem could be the mechanical valve itself that is a valve body. Designers prefer these valves for their quiet and dependable operation. Scott, Possibly if you include adjustable flow balancing valves. Perhaps one reversed low voltage wires. I have 2 other zones that work fine and they do turn the burner on. With that radiator in place I cannot put a twin bed in the room, which I need to do. This device may not cause harmful interference. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. And this is not just an instantaneous short either - once those valves start going, they keep going as long as necessary. The room is small, approx. It is no, Honeywell Home V4043 Motorized Zone Valve APPLICATIONS The V4043 valve has been designed to control the flow of, Owners Manual Please Read & Save These Instructions Rechargeable Fan with Stand Base Features: 3 Speeds Runs up, Comfort Zone CZPH20RSL Outdoor/ Indoor Electric Patio Heater Features: Powerful Golden Halogen Heating Element Full Functioning Remote Control. Sometimes you can detect a problem by checking for continuity between the wires after disconnecting them from the thermostat at one end and the zone valve at the other. More adjustments are available when using the Taco eLink mobile app.

We have a two-port motorised valve that makes a ticking noise when the hot water is switched off.Is there anything that can be done about this? Troubleshooting a taco zone valve checking the voltages images that posted in this website was uploaded by media.wcyb.com. Perhaps there is a draft r at or in the wall cooling the thermostat,or the temperature sensor could be dust blocked. The valves are just out of the box. At the same time when I test the Rh and W1 wires upstairs there is 0 voltage. On 2016-12-13 13:03:05.522294 by (mod) Drayton ZA5 zone actuators & multiple controls. ZONE VALVE DIAGNOSTIC FAQs at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. There is only 1 pump for both zones so it cannot be the issue either. However yours are not on the supply side,but I suspect that they would have to serve a similar function. Dan:Buzzing zone control sounds unusual, perhaps a failing low voltage transformer or a valve that's jamming. Solution: Some thermostats are a Power Stealing type which means they are powered by the switching relay with just 2 wires (R & W). pump magnetic contactor.This means that when the thermostat closes & makes contact, it open the valve which when open should close the end switch that should energise the circ. If this equipment causes harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by doing one or more of the following measures: NOTE: THE GRANTEE IS NOT RESPONSIBLE FOR ANY CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED BY THE PARTY RESPONSIBLE FOR COMPLIANCE. They were both just working fine but now the lower level stays cold and only gets warm when the upper level kicks in. I have to manually open it all the way. I checked the voltage and i get 75 volts at the thermostat, that does not sound right to me (24 v system). It controls the flow of water in a room or zone in response to the demands of the room or zone thermostat. This is a dialog window which overlays the main content of the page. Connect 1 on Master zone control to 1 on all Expansion zone control(s). Hello I could use some advise. Changing the zone valve head is a good diagnostic step to rule out. I know nothing about this stuff so really unsure! Here's a SharkBite 3/4" copper connector that sports male NPT on one end. 0000169579 00000 n Leo As a result, they overheat and burn.Ive had technicians change the 2 main contactors 4 times in the past 30 years & they have burned once more. On 2015-11-24 by (mod) possible bad zone valve motor. The 1st floor new addition will be lets say zone 2, the 2nd floor will be zone 3 and eventually the existing structure of the first floor will eventually be turned over to base boaseboard and made zone 1. AUX 3; Priority Zone Circulator Output: The AUX 3 output is energized when zone 1 calls for heat and the zone valve end switch is closed. The installation just had its 10 birthday. But a zone valve can be located at more remote spots too if a heating zone loop splits into a sub-loop elsewhere in the building.The thermostat controls the zone valve, telling it to open or close in response to a call for heat. Expansion Connections: Set dip switch (#1) to MASTER on the switching relay that is designated as the priority zone control. This device must accept any interference received, including interference that may cause undesired operation. Hot water heating system zone valve installation. i have 2 zones to my furnace basement zone works , but the zone upstairs makes noices as if its working furnace kicks on (2 mins) but no hot water going thru pipes Help! Works just as it should. 0000006356 00000 n Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Modulating Output:Most Mod-Con boilers have an input for an external modulatingsignal (0-10 vdc or 4-20 ma) to control boiler. Taco 571 Zone Valve Wiring Diagram Wiring Diagram And from tops-stars.com. (b):- the end switch circuit is completed from the transfo, to 1 pole for the circ. A:- the # 2 terminal on the valve,B:- one pole on the circ. Troubleshooting a taco zone valve checking the voltages images that posted in this website was uploaded by media.wcyb.com. The whole system is only 4 years old! I havea current problem valve, and I think one that will be a problem soon. View our Privacy Policy here. I think I have to replace the motor of the Honeywell8043, but not sure, since it doesn't work when the thermostat is requesting heat. That's the usual 4-wire Honeywell zone valve set-up. Remodeling Contractor just outside the Glass City. If the subject product or part contains no defect as covered in this warranty, the purchaser will be billed for parts and labor charges in effect at time of factory examination and repair. Zone 2 only (and always) provides heat if hot water or zone 1 is requesting heat. .I hope it will be enough to ensure good performance for a reasonable time. It looks like water got into It from the top. The small plastic switch lifter melted loose and allowed the heater to run continiously till it burnt out. I did a quick google search on the nameplate data on those valves. from the manual one of the Honeywell zone valve manuals at the link I gave above - the V8043 [Click to enlarge any image], why do or what causes Honeywell zone valve to separate were the o ring sits there are four screws holding it in place and one bolt lets go pushing the o ring out are these bolt acting like a shear pin, On 2017-07-15 by (mod) where to find dissolved-resistant zone valves. 0000007345 00000 n Increase the separation between the equipment and receiver. I have a gas fired hot water baseboard system with two zones. Fuses are replaceable; with 2 spare fuses attached to inner cover near the transformer. Yes, when I turned the tstat on, on the offending zone the circulator came on after about 2 minutes but the burner never kicked on. The boiler was hot, it has dom hot water and was running a few minutes earlier. When the dip switch is set to ON, the AUX 2 circulating pump output will energize when any zone calls for heat. For the last few days Zone 2 started to work normally but I haven't changed/ fixed anything besides replacing the Zone 2 valve head but the issue persisted at that time. Priority Operation: When the priority dip switch (#2) is set to ON and the priority zone (zone 1) is actuated, all other zones will stop operation until priority zone is satisfied. Wire the Main Boiler End Switch to T T input on the boiler. When there is a call for heat, the red LED will come on indicating power to the zone circulator. The unit must be only located in dry interior locations. Below is an excerpt from ZONE VALVE MANUALS & WIRING https://inspectapedia.com/heat/Zone_Valve_Wiring.php On taco 571 zone valve wiring diagram. Interestingly, testing Rh with Y gives 5-6V. Consult the dealer or an experienced radio/TV technician for help. The zone in question is on the 1st floor just above the boiler, there is one large zone for the 2nd floor. The system only fires zones for heating. However, Gwen, with all of the zones left in the manual "ON" position you have no zone control. It seems that if the zone valve has 24 volts and the end switch is turning on the circulator but I don't have heat the zone, the valve body must be stuck or frozen closed. Thanks, Dan take a look at the diagnostics and cures. On 2017-03-11 by (mod) - where are the zone valves located? Vibration? Priority Protection Operation: If the priority zone calls continuously for more than one hour, power is returned to all the other zones, allowing each zone to function independently. You'll need to use either a coupling (shown below) or a SharkBite connector that provided a male NPT fitting on one end. Taco reserves the right to make changes in details of design, construction, or arrangement of materials of its products without notification. I have the third zone shut all the way down on the thermostat and it still seems to run when the second zone is turned on. The modal window is a 'site map' of the most critical areas of the site. Forcing the zone valve open and then getting heat tells me that the circulator was running but the zone valve not opening. Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. SUCH MODIFICATIONS COULD VOID THE USERS AUTHORITY TO OPERATE THE EQUIPMENT. I have a two zone heating system. On 2016-12-26 by (mod) - no heat: thermostat exposed to drafts? bk, are these zone valves in addition to the several pumps I see in one of the pics? If there are isolation valves on either side of the zone valve (usually not there) the job would be easier; I can't say what's easy or not for someone I don't know - it's basic plumbing plus heating knowledge necessary to wire the valve (read the instructions and copy the old hookup if the valve is the same brand and model) and knowledge necessary to bleed air out of the system if neeeded.InspectApedia also offers articles on how to bleed air from the system . I found the old thermostat (with batteries) and the remainder of the 18 gauge wire that I used to run C wires from haulers to ecobees and connected that wire on one end to the Rh wire from the 24V transformer to thermostat and W1 wire from thermostat to zone valve. SZ Series PowerTrack Motorized Zone Valve This is a legacy product document supported by Resideo. I'm thinking because the basement is sucking up all the power/heat. Thank you for the reply. After some further inspection, it looks like the problem may be mechanical in nature. 0000182953 00000 n I have an Argo AZV 244P Zone Valve Control unit and Honeywll Rev A 40004850-001 zone control valves. So i did some basic troubleshooting, and everything electrical checked out ok.

On 2016-12-22 by (mod) emergency use of the manual open lever on a zone valve or pushing the head down. Connect terminal 3 on ZVC to one of the end switch connections on the zone valve. Eventually the whole hose will be turned over to base board. After all, equal length is not enough to assure even heat across 3 loops as they may rin at different levels, have a different number of turns, even run through building areas with different rates of heat loss.

Granted the tub is at the opposite end of the house but the old 40 gallon tank had no problem filling the tub with hot water. Readers should make sure they have at least a 75VA transformer for the valves - 60VA for full load plus 20% headroom. DoItYourself.com, founded in 1995, is the leading independent 0000033025 00000 n The reason given was that the Taco valves take time to open and that the new boiler would tend to overheat waiting for that valve to open. I wonder what the rating on the transformer is? So the proper place to install the 1-way valves is in each RETURN line. Outdoor Sensor:An outdoor sensor is required when utilizing the outdoor reset function. I have a four zone boiler system. 0000005643 00000 n On 2017-05-19 by (mod) - ticking zone valves. brand new motor valve. The zone valve stays open on the 1st floor and when control by our nest thermostat, it doesnt push hot water.

I find that sometimes one of my zone valves will stick on causing my house to overheat. Taco makes a 1-valve that you can insert into the line of each zone. This transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. See if the zone valve is stuck shut; see if you can latch the valve in a manual OPEN position. When I call for heat using the old thermostat the zone valve opens the mechanical valve heat works every single time I test/ use it instead of turning on the zone valve manually. Furthermore, what are we talking about here - a matter of seconds, not even minutes, for a zone valve to open. 0000037045 00000 n To fix the problem I installed a solenoid valve on the zone, a normally closed valve that only would open when the pump was energized. Do not try using PEX tubing as the heating system temperatures are likely to exceed the PEX maximum (typically 130F).

More adjustments are available when using the Taco eLink mobile app. Primary Pump Operation: When the dip switch (#3) is set to OFF, the AUX 2 circulating pump output will energize when any zone calls for heat, except the priority zone. Try tapping on the valve when that particular zone is active, and the valve is in the open position. It doesnt work. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. I changed the lower thermostat but the problem persist. Absolutely no problem.

I changed the zone valve and ecobee, did not help, exactly the same issue.