Note: The safety/drain valve is held closed
by an electrical coil. To save battery power,
we recommend to open the valve if the
vehicle is not in use for a prolonged period.
If the temperature at the safely/drain valve is
less than 4°C, the water contents may
discharge on it's own accord if the appliance
is not in operation (also if there is a failure).
To avoid water loss, switch the device on
(Summer or Winter operation) and close the
safety/drain valve at the actuating button by
raising it up (position m).
Without heater operation, the safety/drain
valve can only be closed again at
temperatures above 8°C!
The draining socket of the electrical
safety/drain valve must always be kept clear
(free from slush, ice, leaves etc.)! There
shall be no guarantee claims for damage
caused by frost!
Filling the boiler
1. Close electrical safety/drain valve at the
control knob by lifting up (position m).
At temperatures of around 8°C and less,
switch on the heater or water heater first,
to make sure the valve does not open
again!
2. Switch on power for water pump (main
switch or pump switch).
3. Open hot water taps in kitchen and
bathroom, (set pre-selecting mixing taps
or single-lever fittings to "hot"). Leave
taps open until the water heater has
forced out air and filled up with water and
water is flowing out of the taps.
Note: If just the cold water system is being
operated, without using the water heater, the
heater tank also fills up with water. In order
to avoid damage by frost, the water
contents must be drained by operating
the safety/drain valve, also when the
water heater has not been used. As an
alternative, two shut-off valves, resistant to
hot water, can be fitted in front of the cold
and hot water connection.
Attention: When connecting to a central
water supply (rural or city mains), a
pressure reduction valve must always be
installed to prevent pressures above 2.8
bar from developing in the water heater.
Draining the water heater
1. Interrupt power for water pump (main
switch or pump switch).
2. Open hot water taps in kitchen and
bathroom.
3. Open electrical safety/drain valve at
control knob by pressing in (position n).
58
Equipment Details
TRUMATIC C 3402, C 6002
Attention: Before using for the first time, it
is essential to flush the entire water supply
through with clean warm water. If the
heater is not being used, always drain the
water contents if there is a risk of frost.
There shall be no claims under
guarantee for damage caused by frost!
Also drain the water prior to repair or
maintenance work on the vehicle (in the
workshop!) as the electrical safety/drain
valve opens when the appliance is
switched dead.
Electrical safety/drain valve
m = Control knob "closed"
n = Control knob "drain"
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