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Easy User Guide;  
 
 
Vaillant VRT 392f 

 

V 1.1 Apr_2010 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Changing Room Temperature  

 

The following steps will change the current room temperature.  
 

a. Turn 

the 

right-hand

 dial 

clockwise or anti-clockwise

. The current room temperature will be 

highlighted and replaced by the desired room temperature. 

b.  When the desired new temperature is shown highlighted simply leave the control for 3 seconds. 

The control automatically accepts the new setting and the display changes back to show the 
current room temperature again.  

 

 

Selecting Operating Mode

 

 
By turning the 

left-hand dial clockwise

 or 

anti-clockwise 

the modes will become highlighted. When 

the desired mode is shown highlighted simply leave the control for three seconds. The highlighted 
section will revert back to normal and the desired mode has been set.   
Modes are shown below. 
 

 
 

If you press either dial by mistake simply wait until the display changes back to 
the normal display before proceeding. 

 

Auto 

Heating and hot water follow the 

Time and Temperature  Programmes already set in 

the control

. These programmed into menu screens         2 heating and         4 hot water.   

Manual

 

Heating and hot water are 

on

 constantly and the temperature is controlled according to 

those programmed into menu screens           2 heating and           4 hot water.    

Off

 

Heating and hot water are 

off

.       Frost protection is active. 

 

Right-hand Dial 

Left-hand Dial 

Mode 

Normally set to Auto 

Current 
Room Temperature

Date & Time  

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