Safety Devices - Kärcher HWE 4000 Manual Original

Safety Devices

Safety valve
The safety valve protects the high pressure system against
–
excessive pressure.
This valve is set and sealed in the factory. Do not change the
–
setting.
Safety switch for water scarcity
When the water supply is scarce, the flow switch switches off the
burner.
Water shortage safeguard
When the water supply is scarce, the flow switch switches off
–
the burner.
Accomodates the switching head during spray jet operations.
–
Switch head for spray jet operation (with upgrade kit
spray jet only)
The flow switch (additional switching head) prevents the burn-
–
er stage 2 from being switched on during spray jet operations
(approx. 1500 l/h) in order to avoid overheating.
The burner stage 1 is released when there is function failure.
–
Safety temperature limiter (upgrade kit for steam
stage only)
The safety temperature limiter switches off the burner when the
maximum permissible steam pressure is exceeded.
Safety valve "steam stage" (upgrade kit for steam
stage only)
The safety valve "steam stage" protects the installation
–
against excessive pressure in the steam stage.
This valve is set and sealed in the factory. Do not change the
–
setting.
Temperature stop for exhaust gases
The exhaust temperature limiter switches off the burner when the
maximum permissible exhaust temperature is exceeded.
Pressure monitor (upgrade kit for steam stage only)
When there is a pressure shortfall (1.2 MPa), the pressure
–
guard switches the operating mode "Operate with steam"
over to "Operate using hot water".
The operating mode "Operate with steam" is released only
–
when the minimum pressure (1.4 MPa) is reached.
Main switch
A main switch that can be locked is to be installed at a safe
–
and easily accessible place to switch off the entire heating
unit.
The main switch is to be switched off while carrying out any
–
repairs or maintenance jobs.
Pump module
If a pump module other than the HD 4000 E is used, you must
check if this module has a pressure limit (max. 1.4 MPa). If this is
not the case, you must install an additional safety valve (order no.
6.412-271) at the input.
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