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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.

Setting your room temperature

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 0.5º change.

User Guide

Single Zone Thermostat 
Y87RF

User Guide

Single Zone Thermostat 
Y87RF

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

Your batteries should be replaced 
when the 

 symbol is displayed. 

To do this, separate the thermostat 
from the wiring plate and insert 2 
new AA alkaline batteries in place 
of the empty ones. Then reattach 
the thermostat to the wiring plate. 

 CLICK

IN

CR

E

A

S

E

D

E

C

R

EA

SE

Getting to know your display

Set Temperature Indicator

Means the figure on the screen is your set temperature, 
rather than your current room temerature.

Heating on

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.

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