'/%3E%3C/svg%3E)
T87K Round Non-Programmable, Heat Only, Mechanical Thermostat, T87K1007
 --%3E %3Csvg version='1.1' id='Fill' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23F15C02' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
 --%3E %3Csvg version='1.1' id='With-RB' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23FBC8B4' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
MANUALS (3)
Product Highlights
Description
The Round T87K and T87N thermostats provide electronic control of 24Vac heating and cooling systems with the classic twist to set dial.
Features
- Mercury Free
- Classic Styling
- Premier White
- Separate temperature setting and thermometer
- The T87K heat only works with 2 or 3 wire heat only systems
- The Easy-To-See has enlarged scale and raised numbers plus it click at every 2ªF change
Specs
| Amperage: | 1 |
|---|---|
| Application: | Heat Only |
| Stages: | 1 Heat |
| Programmability: | Non-Programmable |
| User Interface: | Mechanical |
| Mount: | Round |
| Power Method: | Battery Assisted Power Stealing |
| Temperature Range (F): | 40°F - 90°F |
| Operating Humidity: | 5 to 90% RH, non-condensing |
| Wattage: | 0.4 to 30 |
| Wiring: | Y W R |
| Frequency: | 50 Hz 60 Hz |
| Color: | Premier White |
| Height: | 3-11/16" |
| Width: | 3-11/16" |
| Depth (Inches): | 1-3/4" |
| Voltage: | 24V Low voltage |
Questions?
Compare Similar Products
You May Also Need
Product Reviews
Most Liked Positive Review
Great, simple,durable,well made product !
Most Liked Negative Review
be careful on compatibility
Careless packaging
Good
perfectly advertised, met my expectations
thermostats
As it should be....
Standard of the indusry
Perfect Replacement
no
This is my go to replacement
Good quality
Product Q&A
13 QuestionsQ: what are the mechanical devices to make this work what replaces the mercury mechanism
Asked by cal 11 years ago
Add your answer
It works with a snap action switch. When it operates there is a small click. I have one of these and it works very well.
Q: Will this control on off of the blowers on my hotblast wood furnace
Asked by Stoots the ???????? 12 years ago
Add your answer
Verified Reply- SupplyHouse StaffThis can control the temperature of a 24 volt system. You would need to check the wiring connections on the blower units to verify the voltage and the connection.
Q: How do I calibrate this thermostat?
Asked by Kbob 12 years ago
Add your answer
The only adjustment is by leveling the thermostat. You can adjust it right or left and try using it.
Q: What is the lowest temperature setting it can be set at?
Asked by Amber 12 years ago
Add your answer
The bottom of the dial says 42 deg F. I've never tested its functionality that low, though.
About 40. <a href="http://overview.mail.yahoo.com?.src=iOS"><br/><br/>Sent from Yahoo Mail for iPhone</a>
42 F
The set temp range seems to go down to about 42 degrees F.
The lowest temperature setting on this thermostat is somewhere between 40 and 42 degrees Fahrenheit. I would probably set it to no more than 45 degrees F. Good Luck Ruben
Q: Will this thermosatat work with Taco zone valves using a 24 vac 40 Ma transformer to operate the zone valves and not a Relay box ?
Asked by Tim 12 years ago
Add your answer
If you are using this thermostat to control one zone valve there should not be any issues. The older taco zone valves need 1 amp to energize. This thermostat and your 40 VA transformer should easily work with one zone valve.. Good luck Ruben
I'm not that familiar with zone valves but here's what I can tell you: This thermostat uses a tiny amount of power from the positive wire and closes its internal switch when it is colder than the set temp, closing the circuit to power somethng. What you need to know is how many mA (or watts) the solenoid on the zone valve takes. The two things to be careful of are: does the transformer supply enough power to run the solenoid on the zone valve, and can this thermostat handle that much current? Thermostats are usually used with relays, and the coil on a relay only takes a very tiny amount of power. I'm pretty sure the solenoid (coil) on a zone valve takes quite a bit more.
Q: what if my color wires are different than yours
Asked by bronx 14 years ago
Add your answer
color has nothing to do with it. One wire is used for power relay, the other for heat relay. some also use third, but it is rare. If you got more than 3 wires this model is probably not for you.
In this system, the thermometer acts as an on/off switch. There should only be two wires attached to the furnace terminal (single zone), even if there are three in the cable. You can verify that it acts as switch by examining the schematic for the furnace or temporarily jumpering the terminals- the circulator will start and if the furnace is cold will also fire up/.
Q: Several of the reviews refer to installing temp stops on this thermometer. Is that something that is purchased separately? I didn't see any reference to it in the manual.
Asked by Garth 14 years ago
Add your answer
Verified Reply- PexSupply StaffThe range stop for this thermostat (part 50010944-001) can be purchased separately to establish minimum and maximum temperatures to which the thermostat can be set.
Q: Can these thermostats be used to control the heat for a radiant baseboard heat system, with a thermostat in each room?
Asked by 14 years ago
Add your answer
Verified Reply- PexSupply StaffYes, but the thermostats would need to be connected proper zone valves/pumps in order to zone the system by room.
Q: is the max this unit can be set at is 72 degrees? I am looking for a heat only, low voltage thermostat that can't be set higher than 72 degrees.
Asked by PZ 15 years ago
Add your answer
Verified Reply- PexSupply StaffThis thermostat can be set up to 90°F.
Q: How long is the warranty on this product if I buy from you people?
Asked by 15 years ago
Add your answer
Verified Reply- PexSupply StaffThe manufacturer warrants this thermostat for 60 months from the date of installation.