8
Operating
instructions
Always observe the operating instructions and
„Important operating
notes“ prior to starting!
The vehicle owner is responsible for the correct operation
of the appliance.
The installer or vehicle owner
must apply the yellow sticker
with the warning information,
which is enclosed with the
appliance, to a place in the
vehicle where it is clearly visible to all users (e.g. on the
wardrobe door)! Ask Truma
to send you stickers, if necessary.
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“
The safety/drain valve
is held closed by a 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 safety/drain valve is less than 4°C,
the water contents may discharge on its 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).
Taking into operation
1. Check that the cowl is not
obstructed. Always remove
any covers, open deck cowl
on boats.
In winter, if a roof cowl is fitted, it is recommended that a
cowl extension be fitted (see
Accessories). This must be
removed when the vehicle is
on the move. To run the cowl
through the roof on a caravan, a cowl extension piece is
likewise used, which must be
fixed to the roof with clamp
rings (see Accessories).
2. Turn on gas cylinder and
open quick-acting valve in
the gas supply line.
Heating operation is
basically possible
without restriction with or
without water content.
Summer operation
(hot water only)
Set the rotary switch to Summer operation (c), 40°C or
60°C.
Once the water temperature
which has been set (40°C or
60°C) has been reached, the
burner will switch off and the
yellow monitor lamp (g) will
go out.
Winter operation
Heating with hot
water requirement
1. Set the rotary switch (a) to
the desired thermostat setting (1 – 9). When the system
is switched on, the green
monitor lamp (b) will light up,
and shows the setting for the
room temperature.
2. Set the rotary switch to the
operational setting „e“.
The device automatically selects the output stage required, depending on the
temperature difference between the room temperature
which has been set and the
temperature at the particular
time. Once the room temperature set on the control panel
has been reached, the burner
switches back to the lowest
stage, and heats the water
content to 60°C. The yellow
monitor lamp (g) indicates
the heating-up phase is in
progress, and goes out once
the appropriate water temperature has been reached.
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
claims under guarantee for
damage caused by frost!
Filling the water heater
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
preselecting 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.
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 shutoff valves, resistant
to hot water, can be fitted in
front of the cold and hot water connection.
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).
The water heater content is
now emptied to the outside
through the safety/drain
valve. Place a bucket beneath
the outlet to check whether
the water content has completely drained away (12 litres).
There shall be no claims
under guarantee for damage caused by frost!
Gas operation (heating
and hot water)
a = Rotary switch for room
temperature (1 – 9)
b = Green „Operation“
monitor lamp
c = Summer operation
(water temperature 40°C
or 60°C)
d = Winter operation
(heating without hot
water requirement)
e = Winter operation
(heating with hot water
requirement)
f = Rotary „Off“ switch
g = Yellow „Boiler heating
phase“ monitor lamp
h = Red „Fault“ monitor
lamp
When using vehicle-specific
switches: refer to operating
instructions of vehicle manufacturer.
Room thermostat
i = Room temperature sensor
To measure the room temperature, an external room temperature sensor (i) is located
in the vehicle. The location of
the sensor is determined individually by the vehicle manufacturer, depending on the
vehicle type; consult the operating instructions for your
vehicle for further details.
The thermostat setting on the
control panel (1 – 9) must be
determined individually depending on the heating requirement and the type of
vehicle. For an average room
temperature of about 23°C,
we recommend a thermostat
setting of about 6 – 8.