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Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
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MANUALS (2)
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Product Highlights
Description
- 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!
Specs
| Application: | Heat Only |
|---|---|
| Stages: | 1 Heat |
| Programmability: | Non-Programmable |
| User Interface: | Push Button |
| Mount: | Vertical |
| Power Method: | Hardwired |
| Voltage: | 24V Low voltage |
| Operating Voltage: | 24 VAC +/-10% |
| Wiring: | Two-Wire |
| Color: | White |
| Height: | 5" |
| Length: | 2.72" |
| Depth (Inches): | 0.91" |
| Max. Load: | 1.3A at 24 VAC |
| Display Range: | 32 to 99°F |
| Resolution: | 1° Displayed 0.25° Calculated |
Questions?
Product Reviews
Most Liked Positive Review
Very satisfied
Most Liked Negative Review
no backlight
Good thermostat but...
Good product that I needed and I bought it again yesterday.
Was the exact model we have had since 2001 in our home.
Well worth the investment
Using for Geothermal Radiant Heating
Great Product, simple install
Radiant radiant
easy to install and works just the way it is advertised
wire up and go (simple-dimple)
Works fine.... But
Product Q&A
38 QuestionsQ: HOW CAN TO SET THE THEMOSTAT FROM C TO F
Asked by BAM BAM 14 years ago
Add your answer
Verified Reply- PexSupply StaffYou 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.
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
Q: can this be changed from pwm to differntial control
Asked by 14 years ago
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Verified Reply- PexSupply StaffYou 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
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 by Rick 15 years ago
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Verified Reply- PexSupply StaffYou can use the A3030101 thermostat, but this unit does not have a floor sensor like the 511s.
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.
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!).
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 by Okis 15 years ago
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Verified Reply- PexSupply StaffYou 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.
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 by Meg 15 years ago
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Verified Reply- PexSupply StaffIt 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.
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 by joe 15 years ago
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Verified Reply- PexSupply StaffIf the thermostat calls for heat and is wired correctly, the relay should activate.
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 by Jeff 15 years ago
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Verified Reply- PexSupply StaffThis 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.
Q: can this product be us with ceiling radiant heat ?
Asked by CBH 15 years ago
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Verified Reply- PexSupply StaffThey can, as long as the system will work with low voltage.
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 by Beth 15 years ago
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Verified Reply- PexSupply StaffThe 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 ).
Q: What is the warranty on a A3030101?
Asked by Richard 15 years ago
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Verified Reply- PexSupply StaffThe thermostat is covered by an 18-month warranty from the date of installation.