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Operation of appliances
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Security/drainage valve (FrostControl)
FrostControl is an autonomous security/drainage valve
that operates without electrical current. If there is a risk of
freezing, the valve automatically evacuates the contents
of the boiler via a purge hose. Automatic pressure
compensation by pulsations takes place via the safety
valve in case of excess pressure in the system.
a = rotating changeover switch in “on” position
b = pressure button in “off” position
c = pressure button in “purge” position
d = purge hose (goes through the vehicle floor pan to the
exterior).
1) Closing the drainage valve:
Check to see if the rotating changeover switch is in
the “on” position (a); that is, it is parallel to the water
connection and in operation.
The drainage valve can be shut off manually with the
pressure button (position b) and the boiler filled only
when the temperature on the evacuation valve is above
7°C.
Shut the drainage valve by pushing on the pressure
button. The pressure button should lock in position (b)
“off.”.
2) Automatic opening of the drainage valve:
If the temperature is less than 3°C on the drainage valve, it
will open automatically and the pressure button will pop
out (position c); the water from the heater will drain via
the purge hose (d).
3) Manual opening of the drainage valve:
Turn the rotating changeover switch 180° until becomes
fixed in place; the pressure button pops out (position c).
The water from the heater drains via the purge house (d).
To ensure proper drainage, the purge hose (d) of
FrostControl must always remain free of obstructions
(melting snow, ice, dead leaves, etc.).
The warranty does not apply in the case of damage due
to freezing!
