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Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire

SKU:A3030101

Brand: Uponor (Wirsbo)

Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Qty	Price
	$52.69 / each
	$202.36 / box (4 units x $50.59)

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65 Available

Specs

Product Specs
Application:	Heat Only
Stages: ? Stages close Stages describes the number of heat or cool sources that you need to control with a single thermostat.	1 Heat
Programmability:	Non-Programmable
User Interface:	Push Button
Mount:	Vertical
Power Method:	Hardwired
Operating Voltage:	24 VAC +/-10%
Voltage: ? Voltage close Voltage, or volts, is a measurement of the difference between two electric fields (in heating terms, the difference between the Earth's electrical field and the electricity running through your wires).	Low voltage
Wiring:	Two-Wire
Color:	White
Height:	5"
Length:	2.72"
Depth:	0.91"
Max Load:	1.3A at 24 VAC
Display Range:	32 to 99°F
Resolution:	1° Displayed
	0.25° Calculated

Description for Uponor (Wirsbo) A3030101

When it comes to radiant heating systems, not just any thermostat will do. That's why professional installers choose Wirsbo Radiant Thermostats. They are the first thermostats designed specifically for radiant floor heating.
Why a special thermostat for radiant floor heating? The dynamics of a radiant heating system differ from typical baseboard or warm air heating systems. Radiant systems always heat objects and mass, and need to be addressed differently than conventional thermostat logic.
The Wirsbo Thermostats offer two different control methods to handle this condition--differential and pulse-width modulation. Differential--When the measured room temperature falls 1F (0.5C) below the desired room setting, the control devices wired to the thermostat turns on.
Pulse-width Modulation--When the condition exists where the room temperature is 1 to 3F (0.5 to 1.5 C) below the room setting, the thermostat manages the on-and-off cycle using pulse width modulation. The on-and-off times vary depending on the difference between the room and set temperatures. The farther away the room temperature is from setpoint, the longer the on time. This prevents the room temperature from rising above the set temperature. The heating system runs continually at room temperature differences greater than 3 degrees F below setpoint.
These thermostats also feature digital filtering. This means that the thermostat measure the room temperature continuously. The thermostat's sensor detects even the smallest change, making it better able to react to a room's changing conditions. If all the room's temperatures were displayed as they are sensed, the temperatures shown would appear erratic and inconsistent. Filtering works by averaging the sensed values to ensure a smooth operation and display.
Wirsbo offers three thermostat models: Heat Only (A3030101), Heat and Cool (A3030102) and Heat Only, Three-wire (A3030103). The Heat Only (A3030101) and Heat and Cool (A3030102) thermostats are designed to operate in heating mode over two wires. These types of thermostats obtain their power for operation from taking voltage from the connected wiring. Different from other industry power-sharing thermostats, these eliminate any need for a third wire or battery, which makes the thermostats simple to install, wire and service.
And for those times when the two-wire thermostats aren't appropriate because of incompatibility with some third-party devices, Wirsbo also offers the Heat Only, Three-wire (A3030103).
No matter which thermostat you use, when you're selling radiant, you're selling comfort, The Wirsbo Radiant Thermostats feature special built-in software that provides the ultimate control that standard thermostats--when used with radiant heat--simply cannot. There's no overshoot, no undershoot--just constant, even comfort. Your customers will love the distinctive design and easy-on-the-eyes readout. But most of all, they will love the true radiant comfort only Wirsbo Radiant Thermostats provide!

Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire

REVIEW SNAPSHOT®

by PowerReviews

Uponor (Wirsbo)Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire

4.7

(based on 28 reviews)

100%

of respondents would recommend this to a friend.

Most Liked Positive Review

Very satisfied

I got these because one of our thermostats was acting up. A replacement was easily installed and worked well in the room which has been more evenly heated ever since. The result was so satisfactory that I ordered 4 more for other zones because it was obvious that the electronics. including the temperature sensor, had been changed from the originals which were installed in 2009. If you can use a screwdriver you can install this unit. Only a few minutes are required for installation. [...]

Most Liked Negative Review

no backlight

Works great, but no backlight. In order to adjust the temp at night, yiou need to have a flashlight or turn on the room lights. Why would they make a thermostat without a ...Read complete review

Works great, but no backlight. In order to adjust the temp at night, yiou need to have a flashlight or turn on the room lights. Why would they make a thermostat without a backlight?

Reviewed by 28 customers

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Displaying reviews 1-10

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3/17/2012

5.0

Works Great

By Old House

from NW PA

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

This thermostat is controlling our 1st floor zone for hydronic radiant floor heat. It installed easily and works great. We didn't want a programmable thermostat, which this isn't. Great product so far, especially for the price.

3/13/2012

4.0

Good thermostat, but works oddly

By Brick

from Albany, NY

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

The Uponor t-stat works much better with the radiant heat than the old standard Honeywell t-stat that it replaced, but it doesn't work quite as I expected. When the Uponor indicates that the room has come to the set temperature and it's no longer calling for heat, in fact the circulating pump continues to run until the display indicates one degree above the set temperature. The temperature goes no higher than that, however, and remains stable, unlike the old t-stat.

3/5/2012

5.0

Radiant thermostat with vs circulators

By bk

from Peachtree City, Ga

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

This thermostat does a great job of controlling overshoot with the cycling off & on once it reads within 3 degrees of the set point. I use Taco Delt "T" variable speed circulators together with this thermostat.

1/23/2012

3.0

no backlight

By Mike

from Skyhigh Ranch, CA

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

Works great, but no backlight. In order to adjust the temp at night, yiou need to have a flashlight or turn on the room lights. Why would they make a thermostat without a backlight?

12/12/2011

5.0

Perfect product for consistent heat

By CdaWg

from Montpelier, VT

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

Easy to install and works exactly as advertised. Very excited to have consistently controlled heat in all of my zones! Excellent price and value.

12/9/2011

(0 of 1 customers found this review helpful)

5.0

Good inexpensive thermostat

By Jim

from McPherson, KS

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

I have two of these thermostats and they work exactly like they were intended for. Easy installation and use. No complaints.

12/7/2011

(1 of 1 customers found this review helpful)

5.0

Excellent thermostat!

By Marv

from Poulsbo, WA

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

I have a six zone radiant heat system in my house and one of the original installation thermostats failed recently. The original Wirsbo thermostats are no longer made so I substituted the Wirsbo (Uponor) WT1 two wire heat only model and it works great. It's better than the original Wirsbo thermostat because when the power goes out, it resets to your input temperature as opposed to 70 degrees like my old one. I'm very happy with the WT1 and will end up replacing all my old thermostats with this one.

11/28/2011

(0 of 1 customers found this review helpful)

5.0

Works GREAT..

By Griz

from Seattle

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

Simple to use and you can see the read out if you know what I mean.

11/22/2011

(0 of 1 customers found this review helpful)

5.0

a must for radiant floor heat

By hawk

from fletcher, vermont

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

i have radiant floor heat (2 floors, 3 zones). before installing the wirsbo thermostats, house temperature was somewhat erratic. now it's quite stable.

11/5/2011

(0 of 1 customers found this review helpful)

5.0

Everything as expected

By Annonymous

from Nashua, NH

Comments about Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire:

Perfect replacement for the original thermostat used on our radiant floor heating system. Everything was the same except for the name on the product (said Uponor vs. Wirsbo).

Displaying reviews 1-10

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20 Questions | 25 Answers

Displaying questions 1-10Previous | Next »

Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
Currently I have a 1008 sq. foot single level home with radiant heat provided by a 9kw boiler mfg. by Electro Industries. One zone only. The control is currently performed through the embedded floor sensor only with a Ranco Electronic Temperature Control unit.

I have to reprogram the setpoint of the control unit up or down every time the weather significantly changes in order to maintain the desired room air temperature.

Is the answer to this issue as simple as changing control from the floor sensor to your Radiant WT 1 thermostat? Seems to me that using a thermostat like this that monitors and uses air temperature to control would be more accurate and efficient than me trying to estimate what floor sensor setpoint will give me the desired room temp......Or am I missing something here??

Please advise and thank you much!
Asked on 4/28/2012 by tommyboy from Melrose, MN
Know the answer? Answer this question
2 answers
- VERIFIED BUYER
  
  A:
  It maybe that simple yes.
  Your comfort is closely tied to the temperature your head feels, both
  from radiation (structure temperature) and convection (air
  temperature). In cold weather, while the floor is warm, both the walls
  and the ceiling are likely to be significantly cooler, which will not
  only cool the air, but radiate cold to your head.
  In milder weather the warmer structure will require significantly less
  heat to be provided through the floor (a cooler slab) to be comfortable.
  Another factor is the amount of air circulation between the floor an the
  rest of the structure. A ceiling fan can significantly increase the
  transfer of heat from the floor to the rest of the structure, however an
  air temperature sensor is still recommended.
  Answered on 4/29/2012 by Another PexSupply Customer
- VERIFIED BUYER
  
  A:
  I would think a room thermostat would give a much more consistent room
  temperature. I have three room thermostats one for each of three zones and
  am very happy with it.
  Answered on 4/29/2012 by Another PexSupply Customer
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
HOW CAN TO SET THE THEMOSTAT FROM C TO F
Asked on 2/8/2012 by BAM BAM from GRACE IDAHO
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2 answers
- A:
  Take the thermostat off the wall mounting bracket by gently pushing down on the top this should split the unit from the wall plate. Inside they have a button called the special setting button. Push this once, then using the + and - buttons you can change units from F to C
  Answered on 3/5/2012 by bk from Peachtree City, Ga
- CUSTOMER CARE
  
  A:
  You must execute the following steps:
  1. Press the Special Setting button once.
  2. The display shows the units icon (°F or °C).
  3. Press the + (top) or – (bottom) button to change the units.
  4. The thermostat accepts thechange five seconds after pressing the last button, and then the thermostat returns to normal operation.
  Answered on 2/9/2012 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
can this be changed from pwm to differntial control
Asked on 1/23/2012 by Anonymous
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1 answer
- CUSTOMER CARE
  
  A:
  You can set a 2°F differential. Please see page 4 of the following manual for more information: http://s3.pexsupply.com/manuals/1294429173704/43534_PROD_FILE.pdf
  Answered on 1/24/2012 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
My radiant floor heating is not working due to a failed Wirsbo Setpoint 511S thermostat. It is used for heating only. Is the Wirsbo WT 1 Heat only 2 wire thermostat a suitable replacement for the Wirsbo Setpoint 511S?
Asked on 11/22/2011 by Rick from Portland, OR
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3 answers
- VERIFIED BUYER
  
  A:
  I just replaced one of my Wirsbo setpoint thermostats with the Uponor WT1 models and my system is working great again. The WT1 is a much better thermostat than my original Wirsbo (and it's not made in China!).
  Answered on 12/7/2011 by Marv from Poulsbo, WA
- A:
  The Wirsbo WT1 Heat only 2 wire thermostat is a great replacement for your Wirsbo Setpoint 511S. The Wirsbo WT1 Heat only 2 wire thermostat has many additional features such as condition--differential and pulse-width modulation and digital filtering.
  Answered on 11/30/2011 by Anonymous from None
- CUSTOMER CARE
  
  A:
  You can use the A3030101 thermostat, but this unit does not have a floor sensor like the 511s.
  Answered on 11/23/2011 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
as we text I am building a detached garage for woodworking. I am planning on installing 1/2' PEX in the slab. I live in Wisconsin, what type thermostat do I need ? Is it installed into the slab?
Asked on 10/18/2011 by Okis from SE Wisconsin
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1 answer
- CUSTOMER CARE
  
  A:
  You should be able to use any low-voltage thermostat. The thermostat itself always goes on the wall, but it is a good idea to use a slab sensor with radiant heat. The Uponor A3041501 thermostat is a non-programmable model that comes with a slab sensor.
  Answered on 10/19/2011 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
When our builder installed our hydronic radiant floors, he installed LuxPro mechanical thermostats in each zone. We have many south facing windows to help warm the house in the winter. The temperature in the house is never the steady, even, temperature that is touted for radiant systems. Our home goes from quite cool to overly warm, especially on sunny winter days. We have never been happy with our system and have said we would not put one in again. Is our thermostat the problem? Will buying a Wirsbo radiant thermostat help to control temperature fluxuations?
Asked on 6/25/2011 by Meg from Central New York
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1 answer
- CUSTOMER CARE
  
  A:
  It seems to us as if the thermostat is the issue. We recommend that you use a digital thermostat (they are more accurate). The swing setting on the mechanical thermostat is probably too high. This Uponor thermostat should make your system work much better and allow you to feel more comfortable.
  Answered on 6/27/2011 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
I have a wirsbo heat only thermostat. Wired to a White rogers 829A-845 switching relay.The thermostat display works and I can adjust the on/off temperatures. But the thermostat does not activate the relay.
If i remove the 2 wires from the relay I can activate the relay by jumper between the 2 thermosat terminals.
Any ideas?
thanks
Asked on 3/31/2011 by joe from binghamton, ny
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1 answer
- CUSTOMER CARE
  
  A:
  If the thermostat calls for heat and is wired correctly, the relay should activate.
  Answered on 4/4/2011 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
Is this thermostat compatible with my Taco ZVC405 Zone Valve Control? Also, the PWM operating mode sounds like it could lead to short cycling of the boiler. What do you think?
Asked on 3/16/2011 by Jeff from San Francisco, CA
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1 answer
- CUSTOMER CARE
  
  A:
  This thermostat will be compatible with the ZVC405. The PVM mode is designed to prevent the room temperature from rising above the desired level. It should only shorten the on times of the boiler, rather than making it turn on more frequently. If you do not want to use PVM mode, you can use differential mode instead.
  Answered on 3/17/2011 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
can this product be us with ceiling radiant heat ?
Asked on 2/17/2011 by CBH from Nashville
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1 answer
- CUSTOMER CARE
  
  A:
  They can, as long as the system will work with low voltage.
  Answered on 2/18/2011 by PexSupply Staff from NY
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
Q:
We can't find the Special Setting button. Right now we can't lower the temperature below 59 degrees or raise it above 86 degrees. What are we missing?
Thanks, Beth and Leroy
Asked on 2/7/2011 by Beth from Idaho
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1 answer
- CUSTOMER CARE
  
  A:
  The Special Setting button can be found on the inside of the thermostat case. When using this button, the thermostat must be wired and have power, but needs to be separate from the wall mounting plate. More information on this button, as well as instructions for changing the default upper and lower temperature limits can be found on page 4 of the manual ( http://s3.pexsupply.com/manuals/1286975873009/40450_PROD_FILE.pdf ).
  Answered on 3/8/2011 by PexSupply Staff from NY

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Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire

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Description for Uponor (Wirsbo) A3030101

Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire

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