Honeywell T87RF Single Zone Thermostat User Guide
- June 6, 2024
- Honeywell
Table of Contents
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T87RF/Y87RF
Single Zone Thermostat
User Guide
Setting your room temperature
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Your current room temperature is shown in the display. To set the temperature you want, just turn the dial right to increase and left to decrease.
Each ‘click’ as the dial turns represents a 0.5°C change.
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After five seconds the current room temperature will be displayed once again. The thermostat will then try to maintain your set temperature
as accurately as possible.
You can check your set temperature by turning the dial one ‘click’ to the left or right. The set temperature will flash up for a few seconds, before returning to display the room temperature again.
Night-time temperature reduction
Overnight, or if you are out, it is best to set the thermostat to a lower temperature, as it will save you energy. In general, a reduction of 5°C is recommended, but this will depend on your heating system and the amount of insulation in your home.
Replacing the batteries
The batteries should be replaced when the symbol is displayed.
Remove the dial (1) and separate the thermostat (2) from the mounting plate
(3). Replace the discharged batteries with two new AA alkaline batteries, then
reattach the thermostat to the mounting plate and replace the dial.
Getting to know your display
Set Temperature Indicator
This means the figure on the screen is your set temperature, rather than your
current room temperature.|
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Heating on
This means there is a requirement for some heating, so your boiler should
either be on or cycling on/off.|
Boiler Relay Connection
Means your thermostat is successfully connected to your Boiler Relay.|
Internet Gateway Connection (optional)
Means your thermostat is successfully connected to your Internet Gateway.|
Troubleshooting
Low batteries
If you see this battery icon then you need to replace the batteries right
away.|
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No power to the thermostat
If the thermostat screen is blank after initial installation, then check the
protective tab has been removed from the batteries. Otherwise, try replacing
the batteries.
RF communication error
If these icons are flashing, then there may be an issue with the signal from
the Boiler Relay. The first check there is mains power to the Boiler Relay. If
this does not resolve the problem, consult your installer.| 
Defective thermostat
If this icon is displayed when the thermostat is no longer functioning and
will need to be replaced.| 
Binding your thermostat to an RFG100 Internet Gateway
If you want to be able to operate your Thermostat remotely or add scheduling then you will need to use the RFG100 Internet Gateway (sold separately) and bind the thermostat to it. To do this, please follow the full installation instructions in the RFG100 box, and at the relevant binding stage follow these steps to connect your thermostat:
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Touch and hold the right-hand touch zone for about 10 seconds to activate the binding screen.
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Briefly touch the right-hand touch zone once again to send the binding signal. The and symbols will flash until the binding is successful.
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With good reception, the green LED on the Gateway will then light up to confirm successful binding.
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After binding, the strength of the signal between the devices will appear on the thermostat for a few seconds. 1 equals the lowest strength and 5 the highest.
Then the normal screen will be shown, including a symbol to confirm the Gateway and the thermostat are now connected.
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Please refer to your Gateway instructions to learn how to create your online account and download our smartphone app.
For support:
Resideo
200 Berkshire Place
Winnersh Triangle, Berkshire
RG41 5R
Phone: 0300 130 1299
Pittway Sarl, Z.A. La Pièce 4,
1180 Rolle, Switzerland
Country of origin: UK
© 2020 Resideo Technologies, Inc. All rights reserved.
The Honeywell Home trademark is used under license from Honeywell
International Inc.
This product is manufactured by Resideo Technologies, Inc. and its affiliates.
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