Honeywell's TL8100 Hydronic Thermostat offers the energy savings of a programmable control for a wide variety of applications. It can be used to control 2-way zone valves, 3-way zone valves or circulator pumps in both line volt and low volt applications. It also offers special protection modes to prevent system seizures and to reduce callbacks.
The TL8100 works in the following Hydronic applications:
. Line volt circulators
. 24 volt circulator relays
. 24 volt zone valves
. 120 volt zone valves
Not only is the TL8100 great for valve and pump control, it also does much more!
. Electric heating up to 1200W@ 240V max.
. Millivolt systems (e.g., gas fireplaces)
. Gas, oil or electric systems
. Hot air system with no fan control
Features: 7-Day Programmable - Up to 4 periods per day to fit any lifestyle and help save energy.
Precise Comfort (+/-1ºF) - Maintains consistent comfort to the highest level of accuracy.
Low Battery Indicator - Gives 60-day warning to replace batteries.
Installation Flexibility - Works with mV, 24V, 120VAC, and 240VAC heating systems. Rated at 5A resistive and 2A inductive load.
Pump Protection - Activates zone valves or pumps for one minute every 24 hours to prevent seizures and reduce callbacks.
Armchair Programming - Save time on the job with convenient programming by simply removing the faceplate from the base.
Specifications: Application - Hydronic and Electric Heating Systems
Programmability - 7 Day Program
Color - Premier White®
Terminal Designations - R, W, (X, C, optional remote input)
Switching Action - SPDT
Dimensions (in.) - 4.9 in. high X 3.8 in. wide X 1 in. deep
Dimensions (mm) - 127 mm high X 97 mm wide X 26 mm deep
Mounting - Vertical
Electrical Ratings Maximum load: 5 A (resistive) @ 24 V, 120 V, 240 V 2 A (inductive) @ 24 V, 120 V, 240 V
Frequency 50/60 Hz
Electrical Connections 5.5 in. (140mm) tinned copper lead wires
Operating Temperature Range (F) 32 F to 122 F
Operating Temperature Range (C) 0 C to 50 C
Setting Temperature Range (F) 40 F to 85 F
Setting Temperature Range (C) 5 C to 30 C
Stages 1 Heat
Sensor Element Thermistor
Voltage 24 VDC, 120 Vac, 240 Vac
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
It has helped us reduce our energy bills. We have now purchased three thermostats to upgrade 3 different areas of our church building.
8/24/2011
5.0
Worked well with an inductive load
By Kevin
from San Francisco
About Me Professional
Pros
Cons
Best Uses
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
This Honewell thermostat worked well with an inductive load for fans and pumps. Our installation included a recirc pump and a convective fan. Don't buy the Verdant line voltage thermostat for anything other than a purely resistive load. Actually, don't buy any Verdant products, they have no customer support and don't answer their phone. Buy the Honeywell instead. It's more flexible with installations.
3/15/2011
4.0
Great product
By Ralph
from Baltimore
About Me Homeowner
Pros
Easy To Adjust
Easy To Install
Cons
Hard To Read Display
Best Uses
Homes
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
This is good thermostat for my application. Easy to install & program. Controls my hydronic baseboard heating system perfectly.
12/7/2010
(1 of 1 customers found this review helpful)
4.0
We are now staying warmer!
By Gene
from Springdale, WV
About Me Handyman, Homeowner, Professional
Pros
Easy To Adjust
Easy To Install
Intuitive Controls
Cons
Best Uses
Homes
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
works well -- thanks
3/15/2010
(2 of 2 customers found this review helpful)
4.0
Pretty nice - one functional drawback
By Energy geek
from Oakland CA
About Me Homeowner, Professional
Pros
Easy To Install
Intuitive Controls
Cons
Minimal temp options
Best Uses
Homes
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
Overall performs fine, easy to install and set up and it looks nice in my mid-modern home. Only drawback is that you can only set one temperature for occupied periods and one temp for unoccupied periods. I would rather set one setpoint for early mornings, and a different one for evenings - which I can't do.
2/23/2010
(2 of 3 customers found this review helpful)
5.0
Perfect
By JP
from Coram NY
About Me Handyman, Homeowner
Pros
Easy To Adjust
Easy To Install
Precise Controls
Cons
Best Uses
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
I have two thermostats, one line voltage and one low voltage. I wanted the same thermostat in both spots and this was it. Simplest installation possible, works great, looks great - these have been perfect.
1/28/2010
(2 of 2 customers found this review helpful)
5.0
So far so good
By Sebastian
from Central Vermont
About Me Handyman
Pros
Easy To Adjust
Easy To Install
Intuitive Controls
Precise Controls
Cons
Best Uses
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
This was very easy to install, although I chose the conventional setting as I am using it to control a "smart pump" circulating hot water to radiators. This thermostat seems to have far nicer design features than the Lux models. Easy to read and It is also quite quiet with only an unobtrusive soft click as it switches.In addition I like the fact that it has a low battery indicator but since it is newly installed I have not seen that feature in operation.
1/6/2010
(1 of 1 customers found this review helpful)
4.0
I will buy another
By JW
from New York
About Me Homeowner
Pros
Easy To Adjust
Easy To Install
Cons
Best Uses
Homes
Comments about Honeywell TL8100 Programmable Hydronic Thermostat - Heat-Only:
easy to install, clear display, replacing my old mechanical thermostat with a programable one will lower my heating cost. I am planning to purchase another one for the other zone in my home.
