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Motorized Valve Actuator (MVA), four-wire
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A3020522 has been discontinued
Discontinued January 1, 2014
This product was discontinued by the manufacturer.
MANUALS (3)
Direct Replacement:
Product Highlights
–
24V
TruFLOW Manifolds
Description
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The Motorized Valve Actuator (MVA) (24VAC) features quick-opening motorized valve head that mounts directly onto 1-1/4" Brass and TruFLOW Valved Manifolds. The open/close indicator allows for easy visual inspection. It provides individual flow control on a multi-zoned manifold (manifold serving more than one zone). MVA includes end switch for activation of relay (pump), heat plant or other auxiliary devices. Power-open, spring-closed, do not mount actuators upside down.
Note: The MVA is not compatible with the Wirsbo Genius control system.
Note: The MVA is not compatible with the Wirsbo Genius control system.
Specs
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| Application: | Zoning |
|---|---|
| Voltage: | 24V |
| Operating Range: | 24V +/- 10% VAC |
| Max Close-Off PSI: | 17 psi/39.2 feet of head |
| Wiring: | Four-Wire |
| Type: | Motorized |
| Max Number of Actuators: | 6 MVAs (50VA transformer) 9 MVAs (75VA transformer) 12 MVAs (100VA transformer) |
| Used With: | TruFLOW Manifolds |
| Current Draw Range: | 0.29 Amps |
Questions?
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Product Reviews
4.41 out of 22 reviews
95% would recommend this product
5 star
68%
4 star
18%
3 star
5%
2 star
5%
1 star
5%
Most Liked Positive Review
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Wirsbo MVA have good track record
We have radiant floor heating in 23 homes. Each home uses one Wirsbo MVA for each heating zone. With an average of 4 per home have a total of about 100 heating zones thus 100 valves. The system was installed 11 years ago. Over the last 5 years we have replaced 10 Wirsbo MVA's. I expect to replace a few each season. When they die they tend to stay open so the heat runs constantly. We keep 3 in stock at all times. They take about 10 minutes to install. No need to call the plumber. 90% of the valves have been working for over 10 years. I think that's pretty good. We'll replace as necessary. I'd love it if they would work forever but I guess I need to be real about this.
VS
Most Liked Negative Review
Easy to install
I use the product as part of my home heating system. The valves are easy to replace and the price from Pex Supply is the best around. Unfortunately the valves need replacing about every two to three years. I don't think they're sealed and internal corrosion makes them malfunction.
Showing 1-10 of 22 reviews
Be prepared to replace every 2-3 years
Works fine but have to replace every 2-3 years.
Jim
PA
11 years ago
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MVA for Radiant Heating
Used for zone control in a radiant heating system with 8 MVA valves. All valves have been replaced once. We are now starting to replace the last Wirsbo's with the blue Uponor's. System is 15 years old this October.
The MVA's work good for about 5-7 years. Then the small motors begin to fail or the end switch to the pump fails closed.
donmac
Whidbey Island, Washington
13 years ago
Verified Buyer
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they work like they are supposed to
easy to use easy to trouble shoot
swede
hot springs village arkansas
13 years ago
Verified Buyer
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Very good product.
Product works very well.
Mal
Newaygo, MI
13 years ago
Verified Buyer
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Quick acting
Works great, replacement for a MVA with bad end switch so we will see.
Sears6341
Beecher Il
13 years ago
Verified Buyer
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Valve Actuator
simple screw it on, hook up 4 wires. 2 min time floor heat is up and running, floor is worm again, saved a pile of money
Hillbilly
outback Mn.
13 years ago
Verified Buyer
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Fills the bill.
One of the motorized valve actuators in our heating system failed. I ordered this part as a replacement and it works perfectly.
Steve
Montrose, CO
13 years ago
Verified Buyer
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Just like picture, different color is al
This was a easy replacement would recommend to any homeowner.
Vic
Orcas Island WA
14 years ago
Verified Buyer
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Purchase process was great...
The system works great but more important is the quality follow up processes if your need replacement parts. There are real people who talk to you that help you with technical questions, installation adjustments, who will call you back when there are upgrades. All done quickly, they know that time is important and respect you time. They are great....
Walt
Ocean City, MD
14 years ago
Verified Buyer
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PexSupply exceeded ecpectations.
Installation is simple and straight forward. The directions mention that the manifolds should be balanced. It would have been helpful to have instructions on how to balance the manifolds - I'm a handy homeowner, not an experienced radiant floor installer.
Fred G. (for great) Sanford
Loveland, CO
14 years ago
Verified Buyer
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Product Q&A
14 Questions14 Questions
Q: I am a DYI homeowner, my systemis 10-years old. THere are a couple of rooms where the radiant heat seems to be "hot" all the time, is there a way to test to see if the actuator is bad or if I have other problems. Thanks
Asked by 15 years ago
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Verified Reply- PexSupply StaffYou can always check the actuator with a zone meter to see if the unit is opening and closing based on a call for heat.
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- takman67
Sure, just look at the front of the actuator. If the needle on the valve is in the open position all the time, just disconnect one set of the red and yellow wires from the thermostat connection. If the valve stays open replace it. If it closes, then reopens when you reconnect the themostat wires, your themostat may need replacing.
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Q: I am a DIY homeowner and have a faulty MVA on a 7 valve manifold. It seems like I should be able to replace the MVA myself but before I order parts I would like to know where I can find installation info for the MVA. I prefer to be knowledgeable about a task before spending money on materials and then realize I am in over my head. Can you provide a link where I can get install info for the A3020522 MVA? Thanks
Asked by DIYinNM 16 years ago
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Verified Reply- PexSupply StaffPlease take a look at this document: http://s3.pexsupply.com/manuals/1291296857222/42040_PROD_FILE.pdf
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Q: how do I know wether I can use SKU 3010522 or 3020522 or 3020416 for replacements on my existing system. I have a mix of both types of units now.
Asked by 16 years ago
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Verified Reply- PexSupply StaffThe A3010522 is a thermal 4 wire unit and is slow opening (about 3-5 mins. to fully open), the A3020522 is a motorized 4 wire unit and is fast acting (opens in about 4 secs.), and the the A3020416 is a thermal 2 wire unit and is slow opening (about 3-5 mins. to fully open). All three are actuators and do the same thing as the end result, but each does it differently. So you can use any of them, it just depends on how you want it done.
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Q: Trying to put together a 10 loop heating system. Is the manifold # * A2641000 * Brand: Wirsbo (Uponor) compatible with tthis actuator? Could you help me with putting together a list of necessary items in addition to the manifold listed above to make my setup complete. I will be using 5/8 hePex plus for this setup, that i have already purchased from you guys. Thank you in advance for your help.
Asked by 16 years ago
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Verified Reply- PexSupply StaffThe 10 loop manifold A2641000 is compatible with this actuator, A3020522. Two components you will definitely need are fitting assemblies (20) A4020625 to connect the PEX loops to the manifold and supply/return adapters. The other necessary components will depend on your system setup. Some common system components include pump, switching relay, transformer, and thermostats.
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