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Round Non-Programmable, 1H/1C, Digital Thermostat
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MANUALS (3)
Product Highlights
Description
Manual changeover and R,Rc,O,B,G,Y,W terminals for 24 Vac gas, oil and electric heating with cooling, including 1 heat/1 cool heat pumps. Provides single-stage temperature control for 24V heating-cooling systems with manual changeover from heat to cool.
Features
- Attractive styling complements any decor.
- Large easy-to-read display.
- The temperature reading is easily seen from a distance.
- Backlit display.
- On-demand backlighting makes it easy to read the display in a dark room or hallway.
- No batteries required.
- The temperature setting is held permanently in memory in the event of a power failure.
- Powered through heating-cooling system controls.
- System and Fan switches on the T8775C model.
- Manual changeover from heat to cool on T8775C model.
- Easy installation, set up and 5-minute compressor bypass saves time and increases installer productivity.
- Easily configurable by the use of DIP switches.
- F or C temperature display.
- Selectable heating cycle rates (1, 3, 6, 9 cph) for a variety of applications.
- Cooling cycle rate is fixed at 3 cph.
- This is the standard compressor setting for quick installations.
- Minimum off-time for compressors in the cooling mode.
- Protects and extends the life of the equipment.
- Decorative cover plate is available to cover marks on the wall or to mount the T8775 Thermostat onto an electrical box.
Specs
| Application: | Single-Stage (Heat/Cool) Heat Pump |
|---|---|
| Stages: | 1 Heat/1 Cool |
| Programmability: | Non-Programmable |
| User Interface: | Mechanical |
| Mount: | Round |
| Options: | Fan Control |
| Power Method: | Heat-Cool System Controls |
| Changeover: | Manual |
| Temperature Range (F): | 40°F - 99°F |
| Operating Humidity: | 5 to 90% RH, non-condensing |
| Voltage: | Low voltage 24V |
| Wiring: | Y R O B Rc G W |
| Color: | Premier White |
| Height: | 3-11/16" |
| Width: | 3-11/16" |
| Depth (Inches): | 1-7/16" |
Questions?
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Product Reviews
Most Liked Positive Review
A top notch, no nonsense, thermostat!
Most Liked Negative Review
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need a pro to install
Old familiar shape. Modern technology.
Been using for years
One time purchase....
Non-programmable thermostat
Yes
Great!
Perfect for basement furnace for my elderly mother-in-law
good product good service!
I would buy this product again.
This is a great product!
Product Q&A
9 QuestionsQ: The thermostat reads 84 degrees and we are trying to set the cooling side of the thermostat. We've set it at 70 degrees with it on cool and auto but the room temperature does not change. How can we trouble shoot?
Asked by Darr 11 years ago
Add your answer
Verified Reply- Supplyhouse StaffYou would need a technician or call Honeywell's tech support.
Q: How do I change the heating cycles. It is kicking in every 4-5 minutes.
Asked by Stacy g 11 years ago
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Verified Reply- SupplyHouse StaffThere are dip switches on the back of the thermostat that must be adjusted. Refer to page 3 of the installation manual for more information.
Q: Digital readout says room temp is 81 with small blinking icon to the left of the number,room temp is set at 72 on cool and auto.Don't have the owners' manual so no way to assess problem or what this icon means.Thanks
Asked by robj 14 years ago
Add your answer
Icon to left of temp should display flame in heat mode, or snowflake in cooling mode. If system not working dip switches or wiring could be incorrect for type of system. See attached instructions.
What you see is probably a small flashing snowflake which means if a call for cooling is made before the compressor has been off for five minutes, or if a power interruption occurs while the compressor is running, the thermostat will go into a five-minute delay to protect the compressor. The snowflake will flash during this delay. (A steady snowflake is normal cooling cycle) This can happen if you turn the thermostat up ( turning off the a/c), than turning it back down to soon (turning on the a/c). Foot note: If the five minute delay isn't enough, this can cause the a/c compressor to "lock up" if it hasn't had time to "decompress", and seems to be running but not cooling. This is also common during quick power outages or "brown outs". If this is the case, shut off the a/c unit via the breaker for about 15 minutes than turn it back on. Manual can be found here if this is your model? : copy/ paste: http://customer.honeywell.com/Honeywell/getliterature.axd?LiteratureID=69-1679ES.pdf Original Message-----
If you have the switch set to COOL, and everything is fine, a "snowflake" should be ON steady in the upper left corner. The manual says, "If a call for cooling is made before the compressor has been off for five minutes, or if a power interruption occurs while the compressor is running, the thermostat will go into a five minute delay to protect the compressor. The snowflake ] will flash during the delay." Based on that - if your problem lasts longer than 5 minutes - I would check that all wires in the system are attached securely. You can get a manual here: http://customer.honeywell.com/techlit/pdf/PackedLit/69-1679ES.pdf Good Luck! Ralph.
Q: Does the T8775c T-Stat need the common side or both sides of the transformer supplied to the T-stat. Thanks
Asked by 15 years ago
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Verified Reply- PexSupply StaffThe T8775 does not require a common wire, as it has a power-robbing design. You must have a minimum of 20 vac that is always available at the subbase.
I feel this is up to the buyer in where he lives as for me in Iowa yes it does need both sides
Q: how do i manualy change it from air to heat
Asked by 15 years ago
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Verified Reply- PexSupply StaffYou can switch between cool, heat, and off by using the system switch located on the upper left of the unit.
Q: I bought 4 of the T8775C1005 stats to replace my old mech ones. But, I have a strange problem. I am using them for heat only on a hot water boiler system with Taco zone valves. I installed one first per instructions with the resister provided for the zone valve. It appears to work at first then it goes nuts. It will continue to call for heat even if I switch it to the off position. The temp display will show the temp 78 or higher even though it is not that high. Sometimes the display flashes the temp. After checking the install I thought it must be a bad stat. I put another new one on and it does the same thing. I put my old stat back on and it works fine???Do these thermostats work ok with Taco zone valves? The paperwork says they will. Any ideas?
Asked by Scott 15 years ago
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Verified Reply- PexSupply StaffTaco valves should work with a resistor bar installed.
Q: My current round non-programmable T8775C1005 shows a room temperature approximately 4 to 5 degrees warmer than the actual room temperature in both heat and cool mode. This causes the house to be cooler than desired as the furnace or a/c cycles on/off relative to the room temp. Any repair or should I replace the thermostat with a new one?
Asked by 15 years ago
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Verified Reply- PexSupply StaffThe location of where the thermostat is mounted (by a window for example) could be causing the discrepancy between the actual room temperature and what the thermostat is reading. If location of the thermostat is not an issue, the thermostat itself may be defective.
Q: Can I use this unit for heating system only?
Asked by Bill 16 years ago
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Verified Reply- PexSupply StaffYes, you can use this unit just for heating applications.
Q: I have this thermostat, and it is approximately 5 years old. I can't find the owners manual. It seems like it has a regulator that causes it to not kick in at night, is that possible?
Asked by 16 years ago
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Verified Reply- PexSupply StaffThe T8775C1005 is a digital, non-programmable 1Heat/1Cool thermostat only and is powered through the system heating controls. There is no regulator that comes with this specific thermostat, so it cannot be the reason why you are having this issue.