USER INSTRUCTIONS GH11RA
STRONA
16
Wydanie I
STYCZEŃ 2010
9.
TEMPERATURE LIMITER (STB)
The GH13RA controller is provided with an extra mechanical protection, independent of automatic
systems. It is called safety temperature limiter (STB).
9.1.
Operation principle
In case heating water reaches the temperature of
95
0
C
, temperature limiter will start working
automatically (it will activate the STB function), and interrupt fuel supply and air delivery to combustion
chamber (it will switch off the fan).
When temperature in the limiter drops by approximately
20
0
C
, it will be possible to restart the STB
function, but only manually.
9.2.
STB function restart (manual)
In order to restart the device press push-button “
RESET
” installed on the left side of the controller housing.
The controller does not return by itself to automatic operation due to safety reasons.
Press push-button
twice to resume the controller operation:
- first pressing of push-button
will cancel the alarm and switch off the controller
- second pressing of push-button
will restart the controller
- press push-button
- the controller will switch to automatic operation mode
Temperature limiter (STB)
