Thermal Actuator, Four-Wire
Thermal Actuator, Four-Wire
The Uponor Thermal Actuator is a slow-opening thermal actuator that provides individual loop flow control on a multi-zoned manifold and features an end switch for activation of relay (pump), heat plant or other auxiliary devices.
Uponor's new Thermal Actuator, four-wire features a new design with lower power consumption (1 watt) and includes three adapter rings for compatibility with all of Uponor's radiant manifolds, including:
- Engineered Polymer (EP) Heating Manifold
- Stainless-steel Manifold
- TruFLOW Jr. Manifold
- TruFLOW Classic Manifold
| Application: | Zoning |
|---|---|
| Voltage: | 24 VAC |
| Operating Range: | 24 VAC, +20% -10% |
| End Switch: | 24 VAC, 0.5 A |
| Power Consumption: | 1W |
| Wiring: | Four-Wire |
| Type: | Thermal |
| Fluid Temperature Range: | 32°F - 212°F |
| Height (Inches): | 2.5" |
| Width (Inches): | 1-3/4" |
| Depth (Inches): | 2" |
| Weight (lbs): | 0.32 |
| Warranty: | 10 Year |
Questions?
Most Liked Positive Review
Verify manifold style
I replaced three faulty Wirsbo telestat style thermal valves with this Uphonor valve.This valve comes with the adapters to mount this valve to the various manifolds listed. As I was unsure what MANIFOLD style I had I called Uphonor customer service. The gentleman was extremely helpful and explained ...
Most Liked Negative Review
Pretty poor actuator -- they have two major problems
I have Wirsbo/Uponor radiant floor heat in my house, which originally had the MVA actuators (motorized, also called "Tele-stats") on a 3-zone manifold. They were wearing out after several years of use, so I ordered these new thermal ones for replacement. Like other reviewers here, I have found two...
Reviewed by 114 customers
Great product.
Rated 5 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
It fits perfect and works great.
Excellent valve though expensive
Rated 4 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
Replacing old motorized valves that had corroded open. These are all plastic - nothing to corrode and have no "moving parts". They operate by heating a special wax to expand and open the valve. Should last longer than the 17yrs of the previous ones. The web catalog is one of the best, guiding you from one obsolete part to the replacement with clear explanations along the way. Rather than wasting plastic by supplying 3 adaptor rings (I had to purchase a different, 4th, type) why not remove the adaptors lower the base price and let customers order the adaptor they need. 1 star lost for this and the high price!
Works great - caveat for older manifolds
Rated 5 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
Needed to replace some faulty actuators on an old Wirsbo system (about 28 years old). These come with three adapters, but none of them fit the old manifold (the depth of the thread rings on the included adpaters isn't deep enough to reach and grab the manifold threads). I was about to give up, but after further investigation I saw a video on YouTube mentioning a fourth adapter, VA33. Bingo. If you have an older manifold, you will also need this. I ordered this adapter and everything fit beautifully and it's working great. There's probably not a lot of people out there with such an old manifold, but I would like to see the product description prominently feature a hard-to-miss addendum regarding the fourth adapter. Anyway, adapter works great and has a smaller profile. Love that you can actually see it physically activate and not wonder if it's working or not.
Nice Actuator but adapter ring confusion
Rated 2 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
Needed a replacement actuator so I went online. My original actuator was superseded to a third generation actuator. It was shipped fast tract which was great. It came with 3 adapter rings but none for the manifold I had. I used the chat option at supply house. They had no idea. Called Uponor. They said none of the rings that came with the actuator will work but gave me the ring part number I needed VA33. Called SupplyHouse to see if they could send one right away. Would not send it free of charge had to charge me. I purchase it and was to have it in 4 days. For some reason they shipped it using UPS ground.So Dec. 28 became Jan. 3.
I have already bought this product multiple times
Rated 5 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
Works perfectly for our radiators. Didn't think I'd be able to find it but customer service worked diligently to help me. Within 2 days I had the product I needed. Outstanding service
Recommend Supply House
Rated 5 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
The contractor fixing my radiant heat helped me find and order these products. All parts arrived quickly, are installed, tested and working.
I would buy again.
Rated 5 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
Everything fit and worked great!
Replaced all my old Wirsbo mechanical actuators.
Rated 5 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
I hope these last longer than the old mechanical Wirsbo actuators. My heat in several zones would not shut off. When I inspected the manifolds with the old motor-driven Wirsbo actuators I discovered that many of them had failed. Two had fallen completely off the manifold. I replaced the worst of them and had such success that I went back and replaced all the actuators in my system. Remember that these are in a middle (partially open) position when they arrive. To reset the actuator you must turn the heat on (power the actuator) and then turn it off again. If you don't do that you will be getting heat through that zone until you cycle the thermostat.
My bedroom is warm again!
Rated 5 out of 5 starsComments about Thermal Actuator, Four-Wire
Watched some YouTube videos and replaced several of these. Took about 10 minutes to do the actual work once the parts showed up. Best thermal actuators I've met so far!
Replaced old Wirisbo rectangular actuator
Rated 5 out of 5 starsVerified Buyer
Comments about Thermal Actuator, Four-Wire
Easy to install, good price, great shipping.