2/3.6.1 Steam Boiler With Temperature Sensor And Electrode (Level Sensor) T2-20 - WMF 800 Manual

Engineering
2/3.6.1 Steam boiler with temperature sensor and electrode (level sensor)
Both heating elements (hot water and steam boiler) disable each other. If there is
a change in heating control, there is a pause (flicker). The steam boiler is insulated so
that as little heat energy as possible is lost.
Technical data: steam boiler system
Steam boiler
Steam boiler volume 0.35 litres
Volume to the electrode
Heating element
Heating capacity / voltage/ Standard: 1 kW/230 V
power consumption
Desired temperature 130 °C
Safety valve
16 bar
Test pressure (2.4 MPa)
Temperature sensor
Resistance at NTC at 20 °C about 12.500 ohms
Resistance at NTC at 95 °C about 800 ohms
Resistance at NTC at 125 °C about 350 ohms
Service life for the steam boiler and temperature sensor
Maximum 6 years
Descaling may only be performed with the descaling program and with the intended
descaler.
Fundamental temperature controls:
If below the desired temperature, the heat turns on until the desired temperature is
reached.
T2-20
The heat is switched using an SSR (Solid-
State Relay). The temperature is measured
with an NTC resistor.
The steam boiler is protected by the
following safety systems against
overheating and bursting:
• The temperature sensor switches the
heating element on and off depending
upon the steam temperature.
• The safety thermostat interrupts
the heating circuit if the surface
temperature of the steam boiler exceeds
155 °C.
• The safety valve opens at 16 bar and
vents any excess pressure.
Purchaser-supplied fuse: at
least 10 A
See steam boiler safety
valve chapter.
After 6 years, the steam boiler must be replaced for
safety reasons.
See safety valve chapter 2/3.5.3
© WMF 800 / 900 / 1000 S / 1000 pro S Edition 07/2014 - KMT