Truma Combi 6E User manual

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How to Use my Truma Combi
6E Water and Heating System
A safe operating environment
–The unit may be operated only with appropriate Truma control panels
and accessories.
–Danger of toxic exhaust fumes. The heater’s exhaust can be toxic in enclosed
spaces (e.g. garages, workshops).
What must I do if I smell gas?
–Extinguish all naked flames
–Open windows and doors
–Close all quick-acting valves and gas cylinders
–Do not smoke
–Do not operate any electrical switches
–Have the entire gas system checked by an expert.
If the vehicle is parked in closed rooms:
–Shut off the fuel supply to the heater
–Deactivate the time switch
–Switch off the heater at the control panel.
–If the cowl has been placed near or directly beneath an opening window, the appliance must be
equipped with an automatic shut-off device in order to prevent operation with the window open.
–Heat-sensitive objects (e.g. spray cans) or flammable materials/ liquids must not be stored in the
same compartment where the appliance is installed because, under certain conditions, this area may
be subject to elevated temperatures.

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–Keep flammable materials away from the area in front of the warm air outlets. Never block the
warm air outlets.
–The openings for circulated air intake, the installation compartment and the space around the unit
must be kept free of obstacles so that the unit does not overheat.
–Keep the cowl for the exhaust duct and combustion air intake free of contamination (slush, ice,
leaves etc.) at all times.
–Danger from hot surfaces and exhaust gas. Do not touch the area around the wall cowl and do not
lean any objects against the wall cowl or the vehicle.
Obligations of the operator / vehicle owner
–The operator is responsible for the water with which the Combi boiler is
filled and for its quality.
–The vehicle owner is responsible for correct operation of the appliance.
–The installer or vehicle owner must affix the supplied yellow sticker with the warning information
in a location in the vehicle where it is clearly visible to all users (e.g. the wardrobe door). Missing
stickers can be requested from Truma.
–Liquid gas systems must comply with the technical and administrative regulations of the respective
country of use (e.g. EN 1949 for vehicles in Europe). The national legislation and regulations (e.g.
DVGW Work Sheet G 607 for vehicles in Germany) must be observed.
–The vehicle owner must arrange for the gas system to be tested (in Germany every 2 years) by a
liquid gas expert (DVFG, TÜV, DEKRA). The test must be confirmed on the respective test certificate
(G 607).
–Pressure regulating devices and hoses must be replaced with new ones no more than 10 years
after their date of manufacture (every 8 years if used commercially).
–Inspect hose lines regularly and have them replaced if they are broken.
–If the heater is not being used, always drain off the water if there is a risk of frost. No claims may
be made under the warranty for damage caused by frost.
Safe operation
–The use of upright gas cylinders from which gas is taken in the gas phase is mandatory for the
operation of gas pressure regulation systems, gas equipment and gas systems. Gas cylinders from
which gas is taken in the liquid phase (e. g. for fork lifts) must not be used, since they would result in
damage to the gas system.
–The operating pressure of the gas supply (30 mbar) and of the appliance (see type plate) must be
the same.

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–In Germany, only pressure regulating equipment that complies with DIN EN 16129 (in vehicles)
with a fixed output pressure of 30 mbar may be used for the gas system. The flow rate of the
pressure regulating equipment must correspond to at least the maximum consumption of all devices
installed by the system manufacturer.
–We recommend the Truma MonoControl CS gas pressure regulation system for vehicles and the
Truma DuoComfort / DuoControl CS gas pressure regulation system for dual-cylinder gas systems.
–At temperatures of around 0 °C and below, the gas pressure regulation system or the changeover
valve should be operated with the EisEx regulator heater.
–Suitable hoses that meet national regulations must always be used in the
respective country for which the equipment is destined.
–Ensure that the inside of the vehicle is sufficiently ventilated. When the unit is
started up, there may be some smoke and/or smell due to dust or dirt. Especially if it has
not been used for a long time.
–This appliance can be used by children aged 8 and over, as well as by persons with reduced
physical, sensory or mental capabilities or with a lack of experience and knowledge, provided that
they are supervised or have been instructed on how to use the appliance safely and that they
understand the resulting risks. Children must not be allowed to play with the appliance.
–The integrity and tight fit of the exhaust double duct must be checked regularly, particularly at the
end of long trips. Also check the mounting of the unit and the cowl.
Operation while driving
–Directive UN ECE R 122 stipulates that a safety shut-off device is required if motor homes and
caravans are heated while driving. The Truma MonoControl CS gas pressure regulation system
satisfies this requirement. Throughout Europe, a type-tested liquefied gas heating system may be
used while driving (according to the directive UN ECE R 122) if the system includes a gas pressure
regulator with an appropriately configured gas installation. National regulations and rules must be
followed.
–If no safety shut-off device (e.g. as contained within the Truma MonoControl CS gas pressure
regulation system) has been installed, the gas cylinder must be closed when driving and information
signs must be attached in the gas cylinder protection box and in the vicinity of the control panel. –
Liquid gas equipment must not be used when refuelling, in multi-storey car parks, in garages or on
ferries.
–To prevent damage to the appliance from spray water, such as when cleaning the vehicle, do not
spray water directly into the cowl.
Troubleshooting
–If you notice unusual noises or smells, close off the gas supply and switch off the Combi.

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–Danger of fire / explosion if you attempt to use a Combi that has been damaged by flooding or if
the vehicle has been involved in an accident. A damaged Combi must be repaired by an expert or be
replaced.
–Have faults repaired by an expert without delay.
–Only carry out repairs yourself if the solution is described in the
troubleshooting guide of this manual.
–Following a deflagration (backfire), have the appliance and the exhaust duct
checked by an expert.
Maintenance / Repairs / Cleaning
–The unit may only be repaired and cleaned by an expert.
–Maintenance, repairs and cleaning must not be done by children.
–Guarantee claims, warranty claims and acceptance of liability will be ruled out in the event of the
following:
–Modifications to the appliance (including accessories),
–Modifications to the exhaust duct and the cowl,
–Use of replacement and accessory parts other than original Truma parts,
–Failure to follow the installation and operating instructions. The appliance’s operating permit, and
consequently also the vehicle’s operating permit in some countries, are also rendered void.
–With a new Combi or if the appliance has not been used for some time, thoroughly rinse all
hot/cold water hoses with drinking water before use.
Function description (Combi E)
The liquid gas heater Combi E is a warm-air heater with integrated hot water boiler (10 litres
volume). The burner is fanassisted, which ensures that operation is problem-free, even when on the
move. The unit also has heating elements for electrical operation.
In heating and hot water mode the heater can be used to heat the room and heat water up at the
same time. If only hot water is required, select hot water mode.
At a temperature of approximately 3 °C at the automatic FrostControl safety/drain valve, the valve
will open and drain the boiler.
3 different options are available for operating the unit:
–gas mode only Propane / Butane for autonomous use
–electrical mode only 230 V for stationary use on camp sites

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–or gas and electrical mode
–mixed mode Only possible in winter.
Heating and hot water mode
In heating and hot water mode, the unit automatically selects the required
operating level according to the temperature difference between the temperature
set on the control panel and the current room temperature. If the boiler has been filled, the
water is automatically heated as well. The water temperature depends on the selected operating
mode and the heater output.
All 3 energy selection options can be used for winter deployment.
–In gas mode the unit automatically selects the operating level that is required.
–In electrical mode output of 900 W (3.9 A) or 1800 W (7.8 A) can be manually preselected in
accordance with the fuse protection at the camp site. If more output is required (e.g. heating up or
low outside temperatures) gas or mixed mode should be selected so that enough heating power is
always available.
–In mixed mode 230 V electrical mode is preferred if the power requirement is low (e.g. for
maintaining the room temperature). The gas burner is not enabled until the power requirement is
higher, and is the first to switch off during heat-up operations.
Hot water mode (with filled boiler only)
Gas mode or 230 V electrical mode is used to generate hot water. The water temperature can be set
to 40 °C or 60 °C.
–In gas mode the water is heated at the lowest burner setting. Once the water temperature has
been reached, the burner switches off.
–In electrical mode output of 900 W (3.9 A) or 1800 W (7.8 A) can be manually selected in
accordance with the fuse protection at the camp site.
Mixed mode is not possible. With this setting the unit automatically selects electrical mode. The gas
burner is not enabled.

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Read the safety instructions and operating instructions carefully before
starting the unit.
Operating instructions can be viewed in offline mode with a mobile device and the Truma App.
Download the operating instructions when you have a WiFi
connection and save them on your mobile device.
Before initial use, be sure to flush the entire water supply thoroughly with clear
water.
The materials of the appliance that come into contact with water are drinking
water safe (see manufacturer declaration: www.truma.com –Manufacturer
Declaration).
Control panels
The control panels are described in separate operating instructions.
Room temperature sensor
To measure the room temperature, an external room temperature sensor (2) is located in the
vehicle. The position of the sensor is determined by the vehicle manufacturer depending on the
vehicle model. More information can be found in the operating instructions for your vehicle.
The temperature setting on the control panel depends on personal heating requirements and the
design of the vehicle, and must be determined individually.
Safety/drain valve
A. FrostControl (Safety/drain valve with integral frost protection / optional in UK version)
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 socket. If excessive pressure is present in the
system, pressure will be automatically intermittently equalized through the pressure relief valve.
Opening the safety/drain valve
–Turn the rotary switch by 180° until it engages, whereby the pushbutton pops out (The water from
the boiler drains through the drainage socket
The FrostControl drainage socket must be free of contamination (slush, ice, leaves, etc.) at all times
so the water can drain out easily! No claims may be made under the warranty for damage caused by
frost.

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Closing the safety/drain valve
–Check whether the rotary switch is set to “On” i.e. parallel to the water connection and engaged.
–Close the safety/drain valve by pressing the pushbutton. The pushbutton must
engage in position “closed”.
Only when the temperature at the safety/drain valve is above approx. 7 °C can it
be closed manually with the pushbutton 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 sooner,
irrespective of
the temperature in the installation compartment. Automatic opening of the
safety/drain valve If the temperature at the safety/drain valve is below about 3 °C,
it will open automatically and the pushbutton pops out).
The water from the boiler drains through the drainage socket.
B. Safety/drain valve (Safety/drain valve without frost protection / standard in UK version)
The safety/drain valve automatically equalises the pressure in the event of overpressure in the
system. When this occurs, the water is drained to the outside in intermittent bursts via a drainage
socket.
This safety/drain valve does not protect the water container from frost damage.
Opening the safety/drain valve
–Move lever to position –vertical.
The water from the boiler drains through the drainage socket.
The drainage socket of the safety/drain valve must be free of contamination (slush, ice, leaves, etc.)
at all times so the water can drain out easily!
No claims may be made under the warranty for damage caused by frost! Closing the safety/drain
valve –Move lever to position –horizontal.

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Operating instructions
Filling the boiler
Check whether the safety/drain valve is closed (see “Closing the safety/drain
valve”).
When the temperature at FrostControl is below approx. 7 °C, first switch on the
heater to warm the installation compartment and FrostControl. After several
minutes, when the temperature at FrostControl is above 7 °C, the safety/drain valve can be closed.
–Switch on the power for the pump assembly (main switch or pump switch).
–Open hot water taps in the kitchen and bathroom (set preselecting mixing taps or single-lever
fittings to “hot”). Leave the valves open until the boiler has been filled by displacing the air and
water is flowing without interruption.
If only the cold water system is being operated without the boiler, the boiler also fills up with water.
To avoid frost damage, the boiler must be drained via the safety/drain valve, even if it was not
operated.
In the event of frost, filling may be prevented by frozen residual water. The boiler can be thawed by
turning it on briefly (no more than 2 minutes). Frozen lines can be thawed by heating the interior.
If the boiler is connected to a central water supply (rural or urban connection),
a pressure reducer must be used, which will prevent pressures higher than 2.8 bar
from occurring.
Draining the boiler
The boiler must be drained if the motor home / caravan is not being used during the frosty period.
–Switch off the power to the pump assembly (main switch or pump switch).
–Open hot water taps in kitchen and bathroom. In order to check the water that is flowing out,
place an appropriate container (capacity 10 litres) beneath the drainage socket of the safety/drain
valve.
–Open safety/drain valve (see “Opening the safety/drain valve”).
The boiler will now be drained directly to the outside via the safety/drain valve. Check whether all
of the water in the boiler (10 litres) has been drained into the container via the safety/ drain valve.
No claims may be made under the warranty for damage caused by frost.

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Start-up
The interior can be heated in gas, electrical or mixed mode, either with or without water, depending
on the setting. Check whether the power supply fuse protection at 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.
–Check to make sure the cowl is unobstructed. Be sure to remove any covers that may be present.
–Open the gas cylinder and the quick-acting valve in the gas supply line.
–Fill boiler with water if necessary (see “Filling the boiler”).
–Switch on the unit on the control panel.
Switching off
–Switch the heater off on the control panel.
–The switch-off procedure may be delayed by several minutes because of internal heater
operations.
Always drain water contents if there is a risk of frost!
If the appliance is not used for a long period, close the quickacting valve in the gas supply line and
the gas cylinder.
Maintenance
Only original Truma parts may be used for maintenance and repair work.
–Clean the compartment where the unit is installed at least once annually.
–Have an expert check the unit for dirt and clean it if necessary.
–The safety/drain valve must be operated regularly (at least twice annually) to remove limescale
deposits and to be certain that it is not blocked.
We recommend the use of suitable commercially available products to clean, sterilise and maintain
the boiler. Products containing chlorine are not suitable.
The effectiveness of the use of chemicals to combat microorganisms in the appliance can be
increased by heating the water in the boiler to 70 °C at regular intervals.
–Select “Gas mode”. – Set the water temperature to 60 °C.
–Switch on the appliance.

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Once the water in the boiler has reached a temperature of 60 °C, the burner will switch off. The
appliance must stay switched on for at least 30 minutes and no hot water may be removed. The
residual heat in the heat exchanger will
heat the water up to 70 °C.
Fuses
Fuse 12 V
The fuse is in the electronics beneath the connection cover.
Always replace the fuse of the unit with an identical fuse.
230v (Combi E)
The fuse and the power supply lines must only be replaced by an expert!
The unit must be disconnected from the mains (all poles) before opening the electronic housing lid.
The fuse is in the power electronics housing lid.
This fine fuse must always be replaced with a fuse of the same type:
230 V overheating switch.
If the 12 V power supply is interrupted during operation or during the after-run period, for example,
the temperatures within the unit could activate the overheating protection.
To reset the overheating protection, allow heater to cool, remove connection
cover and press red reset button.

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Faults
Faults
Heater Descriptions of possible fault causes and a troubleshooting guide can be found in the
operating instructions for the control panel that is installed.
Faults –Water supply Possible fault causes and a troubleshooting guide –See
“Troubleshooting guide (water supply)”.
Troubleshooting guide (water supply)
Fault
Cause/Remedy
Water taking an extremely long time to heat up.
Water running away –boiler cannot be filled.
Boiler cannot be drained, even though the
safety/drain valve is open.
Water dripping/flowing from drainage socket of
safety/ drain valve.
After the heater has been switched off, the
FrostControl opens.
The FrostControl can no longer be closed.
Water container furred. / Descale water system
(see maintenance).
Safety/drain valve open. / Close safety/drain
valve.
Safety/drain valve drainage socket blocked. /
Check opening for soiling (slush, ice, leaves etc.)
and remove if necessary.
Water pressure too high. / Check pump pressure
(max. 2.8 bar). If the boiler is connected to a
central water supply (rural or urban connection),
a pressure reducer must be used that will
prevent pressures higher than 2.8 bar from
occurring
At temperatures of less than approx. 3 °C the
FrostControl opens automatically / Switch heater
on / Without heater operation the FrostControl
cannot be closed again until the temperature
reaches approx. 7 °C / Use heating element for
FrostControl.
Temperature at FrostControl less than approx. 7
°C / Switch heater on / Without heater operation
the FrostControl cannot be closed again until the
temperature reaches approx. 7 °C.
Rotary switch is not set to “Operation”. / Turn
the rotary switch of the FrostControl to
“Operation”, then press the pushbutton until it
engages.