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Trumatic Combi 4 E Manual

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15
Room thermostat
To measure the room temperature, an external room tempera-
ture sensor (s) 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 instruc-
tions for your vehicle for further details.
s
s = Room temperature sensor
The thermostat setting on the control panel (1 – 5) 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 4.
FrostControl
(safety/drain valve)
FrostControl is a currentless safety/drain valve. When there
is a danger of frost, it automatically drains the contents of
the boiler through a drainage muff. If excessive pressure is
present in the system, pressure will be automatically intermit-
tently equalized through the pressure relief valve.
t
u
w
x
t = rotary switch position “Operation”
u = push button position “Closed”
w = push button position “Drain”
x = drainage muff (led outside through floor of vehicle)
Closing the drain valve
Check if the rotary switch is set to “Operation” (position t),
meaning that it is parallel to the water connection and
engaged.
Close the drain valve by activating the push button. The push
button must engage in position (u) “closed”.
Only when the temperature around the drain valve is over
around 7 °C can it to be closed manually with the press button
(“u” position) and the boiler filled.
Truma supplies a heating element (part no. 70070-01) as an
accessory, which is inserted into the FrostControl and fixed in
place with a retaining bracket. This heating element heats the
FrostControl to approx. 10 °C when the Combi is switched on.
This means that the boiler can be filled after a shorter time, ir-
respective of the temperature in the installation compartment.
Automatic opening of the drain valve
If the temperature around the drain valve is below about 3 °C,
it will open automatically and the push button will disengage
(outward movement) (“w” position). The water from the boiler
will be released through the drainage muff (x).
Manual opening of the drain valve
Turn the rotary switch by 180° until it engages, whereby the
push button moves out (position w). The water in the boiler
drains out through the drainage muff (x).
The FrostControl drainage muff (x) must be free of contamina-
tion (slush, ice, leaves, etc.) at all times so the water can drain
out easily! There shall be no claims under guarantee for
damage caused by frost!
Taking into operation
Heating is possible without restrictions with gas,
electrical and mixed operation, with or without
water.
Check to make sure the cowl is unobstructed. Be sure to
remove any covers that may be present.
Turn on gas cylinder and open quick-acting valve in the gas
supply line.
Check whether the power supply fuse protection on the camp
site is adequate for the 900 W (3.9 A) or 1800 W (7.8 A) that
have been selected using the power selector switch.
The cable drum must be fully unwound in order to prevent the
power cable from overheating.
Summer operation
(boiler operation only)
Select gas or electrical operation using the power selector
switch. Illumination of the yellow LED (g) on the power
selector switch indicates that the unit is operating with 230 V.
Mixed operation (gas and electrical) is not possible in
summer mode. With this setting the unit automatically
selects electrical operation with a preselected power setting of
900 W or 1800 W.
Move the rotary switch on the control panel to position (I –
summer operation) 40 °C or 60 °C. The green (k) and yellow
(p) LEDs light up.
When the selected water temperature is reached (40 °C or
60 °C) the heater shuts off and the yellow LED (p) goes off.
Winter operation
Heating with water temperature monitoring
Select gas, electrical or mixed operation using the power
switch. Illumination of the yellow LED (g) on the power se-
lector switch indicates that the unit is operating with 230 V.
Move rotary switch on control panel to operating position (n).
Set the rotary switch (h) to the desired thermostat setting
(1 – 5). The green LED (k) for operation is lit and simulta-
neously indicates the position of the selected room tem-
perature. The yellow LED (p) indicates the water‘s heat-up
phase.
The device automatically selects the required power setting
in accordance with the temperature difference between the
temperature selected on the control panel and the current
room temperature. When the room temperature selected on
the control panel is reached, the heater switches back to the
smallest setting and heats the water to 60 °C. Once the wa-
ter temperature is reached, the heater switches off and the
yellow LED (p) goes out.
–
… 15 …


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