Combi 2 E / 4 E CP plus (Australia)
Operating instructions Page 2 Installation instructions
Page 9
To be kept in the vehicle!
Combi 2 E / 4 E CP plus (Australia)
1 Control panel (digital)
2 Room temperature sensor
3 Cold water connection
4 Hot water connection
5 Gas connection (with pressure test point – not shown)
6 Hot air outlets
7 Recirculated air intake
8 Waste gas discharge
9 Combustion air infeed 10 Electronic control unit
11 Water container (10 litres)
12 Burner
13 Heat exchanger
14 Power electronics
15 Heating elements 240 V
16 Overheating switch 240 V
17 Safety/drain valve
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Table of contents
Symbols used ........................................................................ 3
Function description ......................................................... 3 Safety
instructions ............................................................ 4
Important operating notes ............................................... 4
18 Water pressure reducer
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.
Operating instructions
Digital Control Panel ............................................................. 5 Room
temperature sensor .................................................... 5 Safety/drain
valve .................................................................. 5 Filling the boiler
..................................................................... 5 Draining the boiler
................................................................. 5
Start-up ................................................................................ 6
Switching off ...................................................................... 6
Maintenance ....................................................................... 6 Fuses
.................................................................................... 6 Fuse 12 V
............................................................................... 6 Fuse 240 V
............................................................................. 6 Overheating
protection 240 V ............................................... 6 Faults
.................................................................................... 7
Troubleshooting guide (water supply) ................................... 7
Technical data ..................................................................... 7
Accessories ......................................................................... 8
Truma warranty policy ..................................................... 8
Installation instructions
Intended use .......................................................................... 9
Approval ................................................................................ 9
Regulations ........................................................................... 9
Selecting a location ........................................................... 9
Securing the device ......................................................... 10 Exhaust
gas removal ....................................................... 10 Installing the
wall cowl ........................................................ 10 Connecting the
exhaust double duct to the device ............ 11 Recirculated air intake
.................................................... 11 Warm air distribution
...................................................... 11
Gas connection ................................................................. 12
Water connection ............................................................ 12
Mounting the safety/drain valve ......................................... 13
Installation of the pressure reducer .................................... 13 Water
pipe routing .............................................................. 13 Installing
the room temperature sensor ...................... 13 Installing the
control panel ............................................ 14
Electrical connections ..................................................... 14 12 V
voltage supply ............................................................. 14 Room
temperature sensor .................................................. 14 Control
panel / air conditioning system .............................. 14 240 V voltage
supply ........................................................... 15
Function test ..................................................................... 15
Warnings ........................................................................... 15
3 different options are available for operating the unit:
– gas mode only
LPG for autonomous use
– electrical mode only
240 V for stationary use on camp sites
– or gas and electrical mode – mixed mode
Only possible in heating and hot water mode.
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 980 W (4.1 A) or 1960 W (8.1 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 240 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 240 V electrical mode is used to generate hot water.
The water temperature can be set to 60 °C.
Symbols used
The unit must only be installed and repaired by an expert.
Symbol indicates a possible hazard.
Comment including information and tips.
Observe the ESD-regulations! An electro-static charge can
destroy the electronics. Ensure potential equalisation
before touching the electronics.
Function description
The Combi 2 E / 4 E CP plus (Australia) liquid gas heater is a warm-air
heater with integrated hot water boiler (10 litre capacity). The burner
is fan-assisted, which ensures that operation is problem-free, even
– 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 980 W (4.1 A) or 1960 W (8.1 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.
Safety instructions
The use of upright gas cylinders from which gas is taken in the gas
phase is mandatory for the operation of gas regulators, 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.
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If the gas system is leaking or if there is a smell of gas:
– extinguish all open flames
– open windows and door
– close all quick-acting valves and gas cylinders
– do not smoke
– do not activate any electric switches – ask an expert to inspect the
entire system!
Repairs may only be carried out by an expert!
During use, please observe the regulations of AS/NZS
60335.1:2010, according to which this device has not been
designed for use by people (including children) who have restricted
physical, sensory or mental abilities or a lack of experience and / or
knowledge, unless they are supervised by a person responsible for
their safety or have received instructions from that person as to
how the device is to be used.
Children should be supervised to ensure they do not play with the
device.
Guarantee claims, warranty claims and acceptance of liability will be
ruled out in the event of the following:
– modifications to the unit (including accessories),
– modifications to the exhaust duct and the cowl,
– failure to use original Truma parts as replacement parts and
accessories,
– failure to follow the installation and operating instructions.
It also becomes illegal to use the appliance, and in some countries
this even makes it illegal to use the vehicle.
The operating pressure for the gas supply is 2.75 kPa and must
correspond to the operating pressure of the appliance (see type
plate).
LPG systems and pressure regulators must comply with the technical
and administrative regulations of the country in which the appliance
is used (AS/NZS 5601). For your own safety it is absolutely necessary
to have the complete gas installation regularly checked by an expert
(at least every 2 years).
At temperatures of around 0 °C or less the gas pressure regulator and
the changeover valve should be operated using the EisEx regulator
heater.
Controller connecting hoses that meet national regulations must
always be used in the respective country for which the equipment
is destined. These hoses must be checked regularly for brittleness.
Winter-proof special hoses must always be used if the equipment is
operated during the winter.
Important operating notes
If the cowl has been placed near or directly beneath an opening
window, the device must be equipped with an automatic shut-off
device in order to prevent operation with the window open.
The integrity and tight fit of the exhaust gas double duct must be
checked regularly, particularly at the end of long trips. Also check the
mounting of the appliance and the cowl.
Following a blow-back (misfire) always have the exhaust duct
checked by an expert.
Keep the cowl for the exhaust duct and combustion air intake free of
contamination (slush, ice, leaves etc.) at all times.
The warm air outlets and the circulated air intake openings must be
clear so that the unit does not overheat.
Do not use any after market air filters or air grills.
The use of such components may cause the unit to overheat.
The integrated temperature limiter blocks the gas supply when the
unit becomes too hot.
Warning: Air from the discharge vent may be hot. Do not place
combustible materials directly in front of the discharge vent. Keep
curtains, bedding and other flammable materials away from the vent.
If no safety shut-off device (e.g. for the gas pressure control
system Truma MonoControl CS / DuoControl CS)
has been installed, the gas cylinder needs to be closed when driving
and appropriate signs must be displayed in the gas cylinder
protection box and close to the control panel.
The vehicle owner is always responsible for arranging the gas
inspection.
Liquid gas equipment may not be used when refueling, in multistorey car parks, in garages, or on ferries.
During the initial operation of a brand new appliance (or after it has
not been used for some time), a slight amount of fumes and smell
may be noticed for a short while. It is a good idea to heat the device
up several times in hot water mode operation (60 °C) and to make
sure that the area is well ventilated.
– Do not place articles on or against this appliance.
– Do not use or store flammable materials near this appliance.
– Do not spray aerosols in the vicinity of this appliance while it is in
operation.
– Do not modifiy this appliance.
The flow rate of the pressure control device must correspond to at
least the maximum consumption of all devices installed by the
system manufacturer.
We recommend the gas pressure control system Truma MonoControl
CS for vehicles and the Truma gas pressure control systems
DuoControl CS for dual-cylinder gas systems.
The safety shut-off device is also recommended for safety reasons if
caravans are being heated while driving.
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 Dometic Service to send you stickers, if
necessary.
Before using for the first time, it is essential to flush the
entire water supply system through with clean 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!
Digital Control Panel
The digital control panel is descibed in a separate operating
instruction.
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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.
up (max. 2 minutes). Frozen lines can be thawed out by heating up
the interior.
If connected to a central water supply (rural or urban
connection), a pressure reducer must be used, which
will prevent pressures of greater than 2.8 bar from occurring in the
boiler.
Fig. 2
The thermostat setting on the control panel depends on the
personal heating requirement and the type of vehicle and must be
idividually determined.
Safety/drain valve
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.
a = Lever in position “Operational – closed“ b = Lever in
position “Operational – closed“ c = Lever in position “Drain” d
= Drainage socket (led outside through floor of vehicle)
Opening the safety/drain valve
– Move lever to position (c) - vertical. The water from the boiler
drains through the drainage socket (d).
The drainage socket (d) of the safety/drain valve must be free of
contamination (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!
Closing the safety/drain valve
– Move lever to position (a) or (b) - horizontal.
Draining the boiler
If the motor home / caravan is not used during the winter,
the boiler must be drained!
– 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 (d) of the safety/drain valve.
– Open safety/drain valve (see “Opening the safety/drain valve”).
The boiler is now 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.
– There shall be no claims under guarantee for damage caused by
frost!
Start-up
The use of the installed control panel is described in separate
operating instructions.
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 980 W (4.1 A) or 1960 W (8.1 A) that have been
selected.
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 gas cylinder and quick-acting valve in gas supply line.
– Fill boiler with water if necessary (see “Filling the boiler”).
– Switch on heater at control panel.
Filling the boiler
Check whether the safety/drain valve is closed (see “Closing the
safety/drain valve).
– Switch on the power for the water pump (main switch or pump
switch).
– Open hot water taps in kitchen and bathroom, (set prese- lecting
mixing taps or single-lever fittings to “hot”). Leave the fittings open
for as long as it takes for the boiler to displace the air and fill up,
and the water to flow 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 residual water that
has frozen. The boiler can be thawed out again by briefly starting it
Switching off
– Switch off heater at control panel.
– The switch-off procedure may be delayed by several min- utes
because of internal heater operations.
Always drain water contents if there is a risk of frost!
If the heater is not going to be used for a long period of time, close
the quick-acting valve in the gas supply line and turn off the gas
cylinder.
Maintenance
Only original Truma parts may be used for maintenance and repair
work!
The device must be descaled on a regular basis (at least twice a year).
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