We have a hot water boiler with 7 normally open Honeywell zone valves. The - Dennis. Honeywell zone valves are among the most popular in the industry and can be used for applications such as baseboard or radiator heating, radiant floor heat, chilled water cooling and others. 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. How do you check a zone valve to see if it is working? Or see ZONE VALVE DIAGNOSTIC FAQs for help with diagnosing zone valve problems. It still amazes me how it faded into semi-obscurity, especially its use on smaller systems, between when it was first postulated in the 1950s, and when it was \"rediscovered\" by the hydronics industry a few years ago (thanks largely to the efforts of Dan Holohan).If you're in… These include highly-corrosive water, improper pH, and water with a high oxygen content. It is within this room that you will find your zone valves and set to work on installing your new zone valve. Our photo at left shows a Honeywell (TM) zone valve installation. Honeywell V8043C - PN 40003916011 normally closed, also has no end-switch. As I noted, unless the valve mechanism itself is damaged, you can just change the power head - leaving the actual valve assembly in place. I hope this helps. If you have a gas, oil or LPG central heating system, your full set of controls should ideally include a timer or programmer, a room thermostat and thermostatic radiator valves … Zone valves can be used to regulate water flow in hydronic heating or cooling systems. It will close when the thermostat shuts off. 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 Many homeowners can do such a repair. If not then I suspect the zone valve end switch isn't working. If it's a standard 40VA like you find on a lot of equipment from the factory, 7 of those valves will try to draw 60VA if they all open at once.The voltage will sag, the current will go through the roof, and you'll burn the windings on those tiny synchronous motors. Good practice locates the zone controls and circulators on the return side of the hydronic heating loop. boiler) and a single circulator pump (usually located on the return end of the hot water piping close to the heating boiler). Is this a residential building? This is the only one of the four models in this series that is a normally-open zone valve. There are four major zone valve manufactures. should I consider replacing the valve or turning on the heat to clear the system and then turn it down? The V4043H normally closed model has end switches for electrical control of boiler and pump. When using zone valves I like to pipe two pumps in parallel with outlet flow checks. The V4043H normally closed models have end switches for electrical control of pump and/or boiler. Watch out: however, for wiring errors, short circuits, or a misbehaving low voltage transformer. 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. 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. Honeywell V4043H Motorised Zone Valve - 2 Port 22mm Honeywell V4043H are two port motorized valves for flow control applications in domestic central heating systems. Discuss Best 2 port 22mm zone valves normally closed in the Central Heating Forum area at PlumbersForums.net. > Available in 1/2" - 1 1/4" sweat … Here are the factors to consider when choosing a valve; the power source, type of valve, the features offered, materials it is made from, size of the valve, and the limitations and capacities of the valve. There are no gears to strip, or wax conductors to break down. I have a zone valve dripping and when the thermostat turns on the zone valve spins and won't stop on open. And I agree you'd need to look at thermostats and wiring if changing the zone valve type as a normally-open zone valve requires a reverse-acting thermostat (as you indicated).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. Bottom line: Both Honeywell and Taco make reliable zone valves.But Watch out: wiring a MIX of the two brands on a single heating system requires some care as the two brands are not wired identically. Then draw a line to the next sprinkler in the valve zone, and the next, etc. So that's normal. In stock Zone valves manufactured by Honeywell and Taco are the … 5 loops of hot water heating piping leaving the boiler (one at each zone valve) 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. 95 Removable actuator head and replaceable motor makes servicing the valve easy and does not require shutting off the water supply.
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