Safety valve – procedure for performing a functional check
The safety valve is screwed onto the steam boiler via a pipe end. The pipe end is dimensioned so that the valve seal is exposed to a
temperature load less than 80 °C. If functioning normally, the valve need not be replaced during the entire service life of the coffee machine.
Important technical service instructions:
The safety valve must undergo a functional check at least 1 x year.
If an error situation arises, in which the safety valve was triggered, the safety valve will need to be replaced because its seal may be
damaged.
Functional check / venting instructions
Disassemble to the level shown: Top cover and rear cover
• The function is to be carried out at operating pressure
• Gently unscrew the knurled nut on the safety valve (½ to max 1 turn max) until steam escapes
• Afterwards, immediately tighten already at the stop
Technical service instructions:
• The safety valve MUST NOT be vented in the pressureless state.
• The knurled nuts must only be tightened ½ to a maximum of 1 rotation-
otherwise, the clamp collar may come off, which would compromise the
accuracy of subsequent functional checks.
• If the temperature limiter connected downstream of the safety valve trips
during venting, it must be reset.
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