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TECHNICAL GUIDE
STN Steam Generators
Probe 3
Probe 2
Probe 1
PE
HEATING
ELEMENTS
POWER INPUT
S
WATER
FEED
SOLENOID
VALVE
CONTROL BOARD
230VAC in
FAN
SCENT PUMP
24VAC IN CONT. DRAIN FILL
PROBE1
PROBE2
PROBE3
LIGHT
FUSE
NTC2
FUSE
NTC2
TEMP
SWITCH
+/- ill
Fan
Max
100W
Light
Scent Pump
Auto
Drain
See page 21
12V
DC Switch
Temperature
Sensor
7,5 meters
STP
-Classic
STP
-Classic 2.0
STP
-SST
C
CONTACTOR
GROUND
SWITCH
TRANSFORMER
PE
3 core cable
4 core cable
220-240V
1N~
380-415V
2N~
G
N
L
N
G
L1
L2
HEATING
ELEMENTS
CONTACTOR UNIT
It’s possible to connect totally 5 STP steam generators in a series. In this connection, steam generators
act as one big steam generator. Control unit and room temperature sensor are connected to MASTER steam generator.
Each slave must be given a number by DIP switches. This helps troubleshooting in case of malfunction. If an error occurs, in
one of the slave units, error message is followed by a slave number.
For example E1 -> S2 -> E1 -> S2.
Pressing ON/OFF button disables the slave and rest of the generators can operate normally. Slave generators must be checked
and reactivation happens by shutting down the whole steam generator chain. Either turning of main breaker for 5 seconds or
switching OFF all steam generatos from their main switch. Once chain is powered, disabled slave will be enabled.
Water Level Probe
Troubleshooting
Below are possible errors of a level probe.
E5 -
E6 -
E7 -
E8 -
E9 -
Temp fuse blows
Tank too full
Fill failure
Illogical water levels
Fill failure
Water level during
automatic drain
Water level during
normal operation
Low level water switch
Contactor OFF.
Electrical Diagrams
NOTE!
Water level measurement is done
between Probe and Tank.
CONVERTIBLE
3,0 kW | 3,5 kW | 4,0 kW | 4,5 kW | 5,0 kW
WARNING!
Do not connect the elements
to the power supply directly.