REMKO PG 25 - Manual (Page 7)

7
Unit function
When the unit has been switched on (operating switch in
position "
I" = heating operation), the supply air fan is
started and the electric solenoid opens. However, gas
supply to the burner is still blocked. Gas supply to the
burner is released only after having pressed on the pin
of the thermoelectric gas valve (safety pilot).
The liquid gas is supplied by means of a nozzle under
pressure to the burner pipe, where it is enriched with an
adequate quantity of oxygen which has been adapted to
the burner capacity concerned.
The generated gas-air-mixture is ignited at the burner
head by an electric ignition spark. The spark is genera-
ted by the manual actuation of the piezo igniter. The
thermoelectric control of the flame is started by heating
the thermocouple. The pin of the safety pilot is to be re-
leased.
Gas supply is interrupted in case of operating troubles or
when the flame goes out. However, the supply air fan
continues working. The unit has to be restarted.
In the case of overheating, the gas supply is interrupted
by a safety thermostat (STB) which blocks all the functi-
ons of the unit. A manual release of the STB can be car-
ried out only after the unit has cooled down.
During the operation of the unit the min/max heating ca-
pacity can be regulated continuously by means of the
built-in "Power Regulation".
The "RESET" position can only be set when the feeler
has cooled to a temperature below approx. 90°C.
In the chapter "Troubleshooting Instructions" you
will find a detailed chart regarding the elimination of
faults.
2
1
Interference elimination
The unit is equipped with a safety thermostat (STB)
which, in the case of overheating, interrupts gas supply
and locks the electric devices of the unit. Any functions
of the unit are switched off.
If the safety thermostat has been released, the reason
for the trouble is to be localized and to be eliminated.
Release is to be carried out after having screwed off the
protecting cap and after having pressed down the key
"STB-RESET".
– Remove protecting cap (1)
– Press key (2)
– Fit protective cap (1)