Page 1
Combi 2 E / 4 E CP plus (Australia)
Operating instructions Page 2 Installation instructions
Page 9
To be kept in the vehicle!
Page 2
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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Servicing shall be carried out only by authorised personel.
Fault
Cause / Remedy
Water taking an extremely long
time to heat up.
Water container furred. /
Descale water system (see
“Maintenance”).
Water running out, cannot fill
boiler.
Safety/drain valve open. / Close
safety/drain valve.
Cannot empty boiler, even though
safety/drain valve is open.
Safety/drain valve draining
connection blocked. / Inspect
opening for contamination (slush,
ice, leaves, etc.) and remove
contamination if necessary.
Water dripping/flowing from
draining socket of safety/ drain
valve.
Water pressure too high. / Check
pump pressure (max.
0.28 MPa). If connected to a
central water supply (rural or
urban connection), a pressure
reducer must be used, which will
prevent pressures higher than
0.28 MPa entering the boiler.
When opening the cold water
tap, hot water comes out.
Hot water flows back through
the cold water supply. / Fit a
non-return valve in the cold
water supply (refer to
installation instructions “Water
connection”).
Please contact Dometic Service Centre for service and repairs.
Biofilm, deposits and limescale must be removed using chemicals to
protect the unit from infestation by microorganisms. Only chloridefree products must be used in order to prevent damage to the unit.
The effectiveness of the use of chemicals to combat microorganisms
in the unit can be increased by heating the water in the boiler to 70
°C at regular intervals.
– Select “Gas” mode.
– Set water temperature to 60 °C. –
Switch on device.
Once the water in the boiler has reached a temperature of 60
°C, the burner will switch off. The unit must stay
switched on for at least 30 minutes and no warm water may be
removed. The residual heat in the heat exchanger will heat the water
up to 70 °C.
Overheating protection 240 V
The 240 V heating facility has a mechanical 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.
Fig. 6
Fuses
Fuse 12 V
The fuse is in the electronics beneath the connection cover. Replace
the unit’s fuse only with an identical fuse.
Device fuse: 10 A – slow – (T 10 A)
Fig. 4
Fuse 240 V
The fuse and the power supply lines must only be replaced by an
expert!
To reset the overheating protection, allow heater to cool, remove
connection cover and press red reset button.
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)
The unit must be disconnected from the mains (all poles)
before opening the electronic housing lid.
The fuse is in the power electronics (16) beneath the electronic
housing lid.
This fine fuse must always be replaced with a fuse of the same type:
10 A, slow, interrupting capacity “H”.
Fig. 5
6
If these measures do not remove the failure, please contact the
nearest Dometic Service.
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Disposal
Combi 2 E CP plus (Australia):
6.9 MJ/h
Combi 4 E CP plus (Australia):
Thermal output
13.6 MJ/h
Electrical operation (240 V):
980 W / 1960 W
Combi 2 E CP plus (Australia):
max. 1950 W
Combi 4 E CP plus (Australia):
Gas consumption (Propane)
max. 3900 W
Combi 2 E CP plus (Australia):
130 g/h
5375
The device must be disposed of in line with the administrative
regulations of the respective country in which it is used. National
regulations and laws must be observed.
Technical data
determined in accordance with EN 624 or Truma test conditions
Type of gas
LPG (Liquefied Petroleum Gas – propane / butane)
Operating pressure
2.75 kPa (see type plate)
Water contents
10 litres
Heating up time from approx. 15 °C to approx. 60 °C Boiler approx.
23 minutes (measured according to EN 15033) Heater + boiler approx.
90 min.
Pump pressure max. 0.28
MPa System pressure max.
0.45 MPa Nominal input
(Propane)
Heater + boiler
Short-term max. 5.6 A (average power consumption 1.1 A)
Heating up of boiler: 0.4 A
Stand-by: 0.001 A
Current input at 240 V
4.1 A (980 W) or 8.1 A (1960 W)
Weight (not containing water)
Heater unit: 15.8 kg
Heater unit with peripheral devices: 16.4 kg
Declaration of conformity
The heater Combi 2 E / 4 E CP plus (Australia) is approved according
AS 4552, AS 4556, AS/NZS 60335.2.21+A1-A3, AS/NZS
60335.2.30+A1, AS/NZS 60335.1+A1 and fulfills these standards:
Dimensions
Mixed operation (gas and electrical): max. 3900 W
Gas operation
Fig. 7
Combi 4 E CP plus (Australia): 130 – 260 g/h Air delivery
volume (free-blowing without hot-air pipe) with 3 hot-air
outlets max. 249 m³/h with 4 hot-air outlets max. 287 m³/h
Current input at 12 V
The right to effect technical modifications is reserved!
Truma warranty policy
Truma CP plus The warranty is given by Dometic Pty Ltd, Building 3B,
Digital control panel Truma CP plus (part no. 36020-01). Clayton Business Park, 1508 Centre Road, Clayton, Victoria, 3168,
for 12 months from the date of purchase against any defect arising
from faulty materials or workmanship.
Repairs will be carried out during normal business hours only by Dometic Pty Ltd, or its duly
authorised service agents, and are subject to the warranty conditions and exclusions
hereunder.
Warranty conditions
– The company will only provide service on presentation of proof
of purchase, on either the Truma product, or the Caravan / RV /
Pleasure Craft in which the Truma product
Fig. 8 has been installed, to any authorised service agent. The pur-
chaser must allow the service agent to photocopy the proof of
purchase to facilitate his claim to the manufacturer.
Accessories (without picture) for control panels – Warranty repairs can only be performed by authorised ser- – Cable 3 m (part no. 36110-
01) vice agents and under no circumstances will Dometic reim-
– Cable 6 m (part no. 36110-02) burse repairs carried out by
unauthorised persons. Tamper-
– Cable 9 m (part no. 36110-03) ing with any part of the product
by unauthorised personnel
will automatically void the warranty.
– The product must be used solely for domestic purposes only. If
the product is used for commercial purposes the warranty is 6
months only.
– Where applicable, the products must be used on the ap- propriate
electrical voltage, gas type and pressure, or fuel source.
– If at any time during the warranty period any part or parts are
replaced with a part or parts not supplied or approved by Truma,
this warranty shall immediately become void.
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Important notice
Accessories
Before calling a service technician please check carefully the
operating instructions, warranty terms and conditions. If the
product fails for any of the reasons detailed therein, or is faulty
due to abuse, misuse or improper installation, then a service fee
shall be charged to the purchaser.
If you have any queries regarding the interpretation of the warranty
you should contact Dometic Pty Ltd.
Whilst this book represents service outlets at the time of printing,
changes occur from time to time. Should you have any queries or
wish to locate your nearest authorised service agent please contact
Dometic Pty Ltd.
Warranty does not cover – Any
heater which has been:
(a) Subject to misuse, neglect, accident or alteration by any
person.
(b) Damaged or destroyed by fire, flood, act of God or other
inevitable accident.
– Fair wear and tear.
– Damage from foreign substances such as dirt or liquid.
– Travelling expenses or call out fee to and from authorised service
agents premises.
– Accommodation or Site Expenses.
– Cleaning of the system or cleaning and adjustment of the gas
system. This is considered to be a part of normal product
maintenance.
– Non operation of the heater or resultant damage to the unit
where the heater has been operated in an out of level situation.
– Freight cost of the appliance or parts, to or from, point of service
or transit damage.
– Dometic / Truma are not responsible for resultant loss or damage
sustained by the purchaser.
– Non operation of the appliance or resultant damage to the unit
where the appliance has not been installed, ventilated, flued or
operated in accordance with the manufacturers instructions.
Installation instructions
Read the installation instructions carefully prior
to starting work and observe the instructions!
Non-compliance with installation instructions
or incorrect installation can result in
endangerment
of persons and property.
This appliance shall be installed in accordance with the
manufacturer’s installation instructions, local gas fitting regulations,
municipal building codes, electrical wiring regulations. AS/NZS 5601
“Gas installations”, and any other statutory regulations.
Please pay attention to the ESD regulations!
Intended use
The Truma Combi 2 E / 4 E CP plus (Australia) liquid gas heater is a
warm-air heater with integrated hot water boiler (10 litre capacity).
Apart from any warranties implied by the Trade Practices Act 1974
or any relevant State legislation all other warranties express or
implied whether arising by virtue of statute or otherwise are hereby
excluded.
The heater comes with additional electric heating elements, for
operation with a mains voltage of 240 V ~.
This unit was designed for installation in motor homes and caravans.
The equipment must not be installed in buses or vehicles for
transporting hazardous goods (vehicle classes M2 and M3). If the
equipment is installed in special vehicles, the applicable regulations
must be followed.
Vehicules for hazardous materials
Combustion heaters for gaseous fuel are not permittet.
Approval
Declaration of conformity
The heater Combi 2 E / 4 E CP plus (Australia) is approved according
AS 4552, AS 4556, AS/NZS 60335.2.21+A1-A3, AS/ NZS
60335.2.30+A1, AS/NZS 60335.1+A1 and fulfills these standards:
The heater complies with the electromagnetic compatibility for
vehicles UN ECE R10.
SAI Global Certification Number
GAS40016
The year when the equipment was first taken into operation must
be indicated with a check on the type plate.
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Regulations
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.
In-vehicle installations must comply with the technical and
administrative regulations of the respective country of use (e.g.
AS/NZS 5601.2 for vehicles). The national regulations and rules must
be complied with.
More information on the regulations in the relevant destination
countries can be requested from our foreign representatives (see
Truma Service Booklet or www.truma.com).
Selecting a location
The unit and its exhaust duct must always be installed so that they
are easy to access at all times for service work (e.g. gas and water
connection via a service flap, furniture doors etc.) and are easy to
remove and install.
ection 30 x 50 mm) can be attached at a height of approx. 180 mm
above the floor, or a board (18a) for sliding in on a stable furniture
console.
There must not be any heat-sensitive materials beneath the unit
(e.g. floor coverings such as PVC, cables etc.), since high
temperatures can occur at the base of the unit.
In order to prevent damage to components inside the equipment,
no cables or water lines of any kind may be attached to the
equipment’s insulation.
The operation of important vehicle components must not be
adversely affected.
The distance between the unit and surrounding furniture items or
vehicle components must be at least 10 mm at all sides.
The flue and warm air ducts can be installed without clearance.
Make sure that there is at least 10 mm clearance to combustible
materials around the warm air discharge vent and 500 mm in front
of the vent. Locate the vent so that curtains, bedding, etc. cannot be
blown directly in front of or in contact with the warm air vent.
For warm air ducting only Truma ductings have to be
installed.
The scope of delivery includes a second type plate (duplicate) with
removable bar code.
If the type plate on the heater is not visible after the heater has
been installed, the second type plate (duplicate) must be affixed to
the unit in a clearly visible location.
The duplicate must only be used in conjunction with the original.
Fig. 9
In order to heat the vehicle evenly throughout, the heater must be
installed in a location in the vehicle that is as central as possible in
a wardrobe, stowage compartment or the like with an adequate
height, so that the air distribution ducts can be routed with equal
lengths. Appropriate openings must be present in the installation
compartment so that air can be drawn in – see relevant sections
concerning circulated air intake and warm air distribution.
Fig. 10
* Minimum dimensions – additional space must be p rovided for the
gas connection, water connections and the FrostControl
depending on the installation situation. All dimensions in mm.
The cowl must be placed in such a way that exhaust gas cannot find
its way into the vehicle interior.
The cowl must be in the form of a wall or roof cow
Fig. 11
The wall or roof cowl must be attached such that there is no fuel
tank filler neck or fuel tank breather opening within 500 mm (R).
There must also be no living area ventilation openings or window
openings within 300 mm.
300 mm
In order to reduce the potential danger caused by a heater
becoming loose in the event of an accident, the
upper covering plate (17) of the installation cabinet can be screwed
to other pieces of furniture in a position that makes it flush with the
heater. Depending on the installation situation, it may be necessary
(especially with rear-mounted fixtures) to install a stable furniture
console (18) in front of (next to) the heater, perpendicular to the
direction of travel. For this purpose, a solid spacer (minimum cross s
Fig. 12
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If the cowl is being installed directly underneath a window
that will be opened, installation of an electric
window switch (part no. 34000-85800) is mandatory.
Information about roof windows
In the case of roof windows (pop-out), the cowl top needs to
protrude at least 10 cm above the opened window. If the cowl is
next to the window, steps must be taken to ensure that, depending
on where it is installed (opened on the right or left), no exhaust air
can enter the open window (e.g. via wind) and that the cowl has a
good supply of incoming air.
Refer to AS/NZS 5601.2 – Gas Installations, for location
requirements of the flue terminal.
Securing the device
Check whether the vehicle has a load-bearing floor or false floor for
securing the heater. If the floor is unsuitable, create a load-bearing
surface beforehand by gluing a plywood board to the floor, for
example.
Screw heater to vehicle floor or false floor using four B 5.5 x 25
screws (included in scope of delivery). Depending on the situation, it
may be possible to secure the heater with three screws; in this case,
always screw aluminum feet (a) and selectively one of the plastic
feet (b) to the vehicle floor.
Fig. 14
The ducts must be cut to length so that they protrude from the hole
for the cowl after installation. The exhaust duct (1) must be 10 %
longer than the combustion air intake duct (5). This avoids exhaust
duct expansion and tensile load.
Fig. 15
Fig. 13
The heater must be screwed to the floor of the vehicle or
the false floor in order to prevent the
gas system from becoming damaged because of movement while
driving!
Exhaust gas removal
Only Truma exhaust duct AA 3 (part no. 39320-00) and combustion
air infeed ZR (part no. 39580-00) may be used for the Truma Combi
2 E / 4 E (Australia) heater because the unit was tested and
approved only with these ducts.
Do not crush or kink these ducts during installation.
The roof cowl is available as an accessory to the heating
device – assembly instructions are enclosed with the delivery.
Installing the wall cowl
Install wall cowl (arrow pointing up) on an even surface around
which wind can flow from all sides. Drill opening with a diameter of
83 mm (duct hole must be lined with wood in cavities). Seal with
provided rubber seal (8). Use flexible body sealant on textured
surfaces – do not use silicone!
Before pushing the exhaust double duct through the hole, slide
clamp (7) over duct.
Slide rubber seal (8 – smooth side towards cowl, sealing lips
towards wall) onto inner part of cowl (9).
Compress beginning of exhaust duct (1) (approx. 2 cm thereof) so
that the coils are lying against each other.
Slide clip (2 - claws facing cowl) over exhaust duct (1).
Slide exhaust duct (1) onto connection as far as it will go (11 –
bend facing upwards).
Slide on clip (2) as far as it will go (end position must be between
claws of clip) and screw in place.
Slide combustion air intake duct (5) onto toothed connecting piece
(12).
Attach cowl inner part (9) with six screws (13), fit outer part of
cowl (14) and screw on with two screws (15) (screws B 3.5 x 25,
included with delivery).
Installing the wall cowl
Permissible duct lengths
The length specific ations refer to the combusti on air intake duct.
Ducts with a length of at least 60 cm to a maximum of 100 cm can
be routed with any amount of rising for the wall cowl, or with a
maximum fall of 20 cm.
Duct lengths from 100 cm to max. 200 cm may only be installed
rising.
10
Use clip (7) to attach combustion air intake duct to connection (12)
from inside and (if length greater than 60 cm) attach to wall with at
least one clip ZRS (16 - part no. 39590-00).
Page 11
Fig. 16
Connecting the exhaust double duct to the device
Compress exhaust duct (1) at its beginning so that the coils lie next
to each other. Slide clip (4 – claws toward unit) over exhaust duct
(1). Slide clip (7) onto combustion air infeed (5). Slide exhaust duct
(1) all the way onto connection (3). Slide exhaust duct clip (4) as far
as it will go (end position must be between claws of clip) and screw
in place. Slide combustion air intake duct (5) onto connection (6)
and secure with clip (7).
Only Truma ducts are approved with the heating system and
must be used.
Use only pressure-safe ducts in compliance with Truma quality
requirements. Other ducts that do not meet our quality standard
(particularly crown pressure resistance, duct diameter and number
of grooves) must not be used.
If the warm air duct has to be subjected to a considerable
amount of bending immediately behind the warm air outlet of
the unit in confined spaces, we recommend the use of the BGC
90° elbow (part no. 34091-01). This elbow makes it possible to
connect a ÜR warm air duct with a diameter of 65 mm or a VR
warm air duct with a diameter of 72 mm.
Fig. 19
With a duct length of less than 2 m the air outlet must not be
installed higher than the warm air duct muff. With a duct length of
less than 50 cm, the duct must create a siphon between the
connection and the outlet.
Fig. 17
Recirculated air intake
The circulated air is drawn in by the unit. This must have one large
or several small openings with a total area of at least 150 cm²
between the living compartment (not the rear storage space) and
the installation compartment.
Fig. 18
The circulated air inlets must be arranged such that exhaust from
the vehicle engine or the heater cannot be drawn in under normal
operating conditions. Structural measures must be taken in order to
ensure that the heating air that is led into the interior of the vehicle
cannot be contaminated.
Warm air distribution
Most of the warm air is led into the floor area of the living
compartment via flexible ducts.
Fig. 20
These measures prevent undesirable heating of the vehicle due to
convection (cowl effect) during operation in hot water mode.
The ducts for warm air distribution must be firmly inserted
into the connections. A clip is attached to each
connection to provide a more secure grip.
For optimum warm air distribution, Truma always recommends
using the 4 warm air outlets of the heater. If only three warm air
outlets are needed, one of the lower warm air outlets must be
sealed with a blank cover VD (part no. 34310-01). The blank cover
must be firmly pushed into the moulded part of the heater until it
audibly engages and is firmly seated. Check for firm seating.
If four warm air outlets are being used, a closable end outlet
EN may be installed in one warm air branch. If
there are only 3 warm air outlets, it must be ensured that if a
closable end outlet is being used (e.g. bathroom) a second nonclosable nozzle must be installed in the warm air branch.
Gas connection
A gas pressure regulator has to be used, which ensures
gas supply at gas pressure level 2.75 kPa. The gas
supply’s operating pressure must be the same as the unit’s
operating pressure (see type plate). The gas installation must
comply with AS/NZS 5601.2.
The gas inlet connection on the Combi 2 E / 4 E CP plus (Australia) is
a 8 mm connection.
The 4 connections on the unit are designed for the 65 mm diameter
ÜR duct (part no. 40230-00).
Prior to connecting the appliance make sure that the gas lines are
free from dirt, chips and such!
11
Page 12
Gas-connection muff (20) on the unit may not be shortened or bent.
Fig. 22
Choose to route the pipes in a way that will facilitate removing the
unit for service tasks.
To connect, the UNF 1/2” – 20 (SAE Male AN Flare) gas inlet
connection (19) provided with the appliance must be used. The gas
inlet connection is preinstalled. Carefully counterhold with another
spanner when tightening!
For connection to 8 mm steel piping Dometic povides an adapter
UNF 1/2” x RVS 8, part no. 70020-02700.
Fig. 21
Route the pipes in such a way that the appliance can be removed
again for servicing.
Refer to AS/NZS 5601.2 – Gas Installations, for gas pipe sizing.
It is absolutely mandatory that the tightness of the gas installation
ist proved before starting up for the first time.
Check for gas leaks (do not check for gas leaks with a naked flame),
then check that the gas pressure is as follows:
The supplied water connectors (27 + 28) and safety/drain
valve (24) have a 12 mm rigid piping connection (e. g. John
Guest System). For connecting to rigid pipes with other diameters
appropiate adapters (not included in scope of delivery) must be
used.
Hoses with a diameter of 12 mm that are drinking water compatible,
pressure-resistant (up to 0.45 MPa) and hot waterresistant up to
+80 °C must be used to connect the unit and the accessories. We
recommend the use of John Guest pipes, insertion sleeves and hose
clamps.
As accessories Truma supplies the water connectors (27 + 28) and
safety/drain valve (24) with a 10 mm / 3/8” diameter hose nipple.
The included elbow fittings (27 + 28) must always be used in
order to completely empty the water and prevent
the water pipes on the unit from leaking over the long-term!
Elbow fitting (28 – with aeration valve) is connected to the upper
warm water connection; the second elbow fitting (27) is connected
to the lower cold water connection.
Route all water lines so they drop down to safety/drain valve!
There shall be no claims under guarantee for
damage caused by frost!
Mounting the safety/drain valve
Mount the safety/drain
valve (24) to an easily
accessible point close to
the device.
LPG: 2.75 kPa
Keep the number of parting connections in the gas supply line in
rooms frequented by people to a technically feasible minimum.
The gas system must accord with the technical and administrative
provisions of the individual country of use (in Australia, AS/NZS 5601
for motor vehicles).
Water connection
For operating the water heater it is possible to use all pressure
pumps and submergible pumps up to 0.28 MPa, also all mixing taps
with or without electrical switch.
In order to guarantee complete emptying of the water
content and to prevent pressures of greater
than 0.45 MPa occurring in the boiler, the enclosed pressure
reducer (22), the enclosed water connectors (27 + 28) and the
enclosed safety (pressure relief) drain valve (24) must be used!
When using pressure pumps with high switching hysteresis, hot
water may flow back through the cold water tap. To prevent the
backflow, we recommend that a non-return valve (nrv – not
included in the scope of supply) be fitted between the outlet to the
cold water tap and the drain valve.
The draining is to be
directly to the outside at a
position protected against
splash water (apply splash
guard, if necessary).
Drill hole with 18 mm
diameter and pass through
discharge socket with hose
(24a). Fasten safety/ drain
valve with 2 screws.
Installation of the
pressure reducer
The pressure reducer (22)
must be fitted between
the safety/drain valve and
water pump in accordance
to the direction of flow.
Fig. 24
Water pipe routing
Water pipes (hoses) need to be installed as short as possible without
kinks. All hose connections must be secured with hose clips or John
Guest connections with safety rings (even cold water)! When the
water is warmed, the resulting expansion may create pressure levels
up to 0.45 MPa until the safety valve triggers (also possible for
submersible pumps).
12
When installing a water supply into the vehicle, please ensure that
there is an adequate distance between the water pipes (hoses) and
the heat source (e.g. heater, warm air duct).
Page 13
Hose clips SC (part no. 40712-01) are suitable for fastening the pipes
(hoses) to walls or the floor. These hose clips also make it possible to
route water pipes (hoses) on the heater‘s warm-air distribution pipes
as a way to avoid the danger of frosting.
A water pipe (hose) may only be fitted at a clearance of 1.5 m to the
heater on the warm air duct. The Truma hose clip SC can be used if
this distance is observed. In the case of parallel installations, e.g.
openings through a wall, a spacer element should also be attached
(e.g. insulation) to prevent contact.
Connect cold water supply (23) to safety/drain valve (24). To
guarantee the correct function of the safety/drain valve, the water
pipes/hoses need to be installed without tension!
Fig. 25
The elbow fitting (28 – with aeration valve) is inserted into the upper
warm water connection and the second elbow fitting (27) is inserted
in the lower cold water connection of the heater up to the stop. Pull
in opposite direction in order to make sure the elbow fittings are
securely attached.
Create a pipe/hose connection (25) for the cold water supply
between the safety/drain valve (24) and the boiler intake.
Ensure that the cold water supply does not come into contact
with cold bridges (e.g. the outer wall) in order to
prevent freezing.
Route the hot water supply (26) from the elbow connec tion with
integrated vent valve (28) to the hot water consumers.
Push the venting hose, external diameter 11 mm (29), onto the hose
grommet of the venting valve (28a), and lay it to the outside without
any kinks. Ensure that the bend radius is not smaller than 40 mm.
Installing the control panel
The installation of the control panel is described in the instructions
included with the control panel.
Electrical connections
Route connecting cables in such a way that they cannot chafe.
Please also use leadthrough bushings or edge protection profiles
where there are sharp edges such as metal panel leadthroughs. The
connecting cables must not be attached to or come into contact
with metal surfaces, the exhaust duct or warm air ducts.
The electrical connections are located under the connection cover
(39). The cover can be removed by pressing and simultaneously
sliding it in the direction of the arrow. When removing or
installing the connection cover on the connection cables, make
sure that the cables are not pulled out or become pinched.
Cut off the aeration hose about 20 mm below the vehicle floor at a
45° angle to the direction of travel (see figure 25).
Installing the room temperature sensor
When selecting the location, bear in mind that the room
temperature sensor must not be subjected to any direct radiant
heat. For optimum room temperature regulation, we recommend
that the room temperature sensor be fitted above the entrance
door.
Fig. 26
Please ensure that the room temperature sensor is always
attached to a vertical wall. There may be no ob-
structions preventing the room air from flowing around it.
Drill a hole 10 mm in diameter. Guide the connection cable through
the drillhole from behind and plug the cable end to the sensor by
means of an insulated connector plug (there is no need to be
concerned about polarity). Slide in the room temperature sensor
and lay the cable end with the two insulated connector plugs to the
electronic control unit (extend to a maximum overall length of 10
m using 2 x 0.5 mm² cable if necessary). connected, otherwise the
heater will switch to fault. The provided room temperature sensor
must always be
40 42 44 46 48
41 43 45 47
Fig. 27
40 = Input voltage +12 V (spade connector 6.3 mm) 41 =
Input voltage -12 V (spade connector 6.3 mm)
42 = not used
43 = Device fuse: 10 A – slow – (T 10 A)
44 = Wire bridge (or window switch – accessory)
45 = not used
46 = Room temperature sensor
47 = Control panel / Diagnostic connector*
48 = Control panel / Diagnostic connector*
* Alternative connections.
All connections to the unit should be made with sagging connection
cables. This will prevent condensation water from running down the
connection cables and into the unit.
13
Page 14
Fig. 28
1
CP plus control
panel
Combi 2 E / 4 E CP plus (Australia)
(heater with electrical heating
elements)
and
1
Air conditioning
system
Suitable systems – see
CP plus control panel operating
instructions
The connecting cables and plugs must not be subjected to force.
Bundle connecting cables (see figure 29) and secure each one to
housing using a cable binder in order to provide strain relief.
Fig. 29
All cables must be securely attached and must not become loose or
disconnected due to vibration – risk of fire!
12 V voltage supply
Electric cables, switching units and control units for heaters must be
arranged in the vehicle in such a way that their satisfactory
operation cannot be adversely affected under normal operating
conditions. All cables leading to the outside must be splash proof at
the leadthrough opening.
Control panel / air conditioning system
The following connecting combinations are possible.
Insert the plug of the connecting cable into one of the connections
(47 or 48) and engage.
240 V voltage supply
The 240 V ~ electrical connection must always be made by
an expert (in accordance with e.g. IEC 603647-721). The
instructions shown here do not constitute a request to non-experts
to make the electrical connection but serve as additional
information for an expert who is employed to do the work!
It is imperative for the connection to be made with care using the
correct colours!
An insulating device for providing all-pole insulation from the
mains with contact clearance of at least 3.5 mm must be provided
by the customer for carrying out maintenance and repair work.
Make connection to power supply by attaching 150 cm long silicon
cable to a line that is protected with as least 10 A (16 A would be
better).
Prior to working on electric components the appliance must be
disconnected from the power supply. Switching off at the control
panel is not sufficient!
When carrying out electric welding work on the body the appliance
connection must be disconnected from the vehicle electrical system.
The unit is equipped with reverse polarity protection. If the
unit is connected with incorrect polarity, there will be
no display on the LED. The unit can be used after establishing proper
polarity.
To guarantee optimum power supply, the heating system must be
connected to the fused on-board network (central electronics unit
10 A) with a 2 x 2.5 mm² cable (for lengths over 6 m with 2 x 4 mm²
cable). If relevant, voltage drops in the supply cable must be taken
into account. Connect the negative lead to the central earth. If
connected directly to the battery, the positive and negative leads
must be fused. For the connections (40, 41), we recommend 6.3 mm
fully insulated flat connectors.
Do not connect any other consumers to the supply line!
When power packs or power supply units are being used,
note that the output voltage is between 11 V and 15 V and
the alternating current ripple is < 1.2 Vpp. We recommend the
automatic chargers from Truma for the different applications. Please
ask your dealer. Other chargers may be used only with a 12 V
battery as a buffer.
Fig. 30
All cables must be secured with cable clips.
Function test
After installation, the gas feed line must be tested for tightness by
the pressure-drop method.
Then test all functions of the unit as described in the operating
instructions, particularly the drainage of the water contents. There
shall be no claims under guarantee for d amage caused by frost!
The operating instructions must be handed over to the vehicle
owner.
Warnings
The installer or vehicle owner must apply the yell ow sticker with
the war ning 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 to send you stickers, if necess ary.
Room temperature sensor
Attach plug of connecting cable to connection (46 – no need to
observe polarity).
14
Page 15
In Australia, always notify the Dometic Service C entre if problems are encountered; in other countries the relevant
service partners should be contacted (www.truma.com).
Having the e quipment model and the serial number ready (see type plate) will speed up processing.
Page 16
Dometic Pty Ltd
Building 3B,
Clayton Business Park
1508 Centre Road
Clayton, Victoria, 3168
Australia
Service (Australia)
Telephone:+ 61 (0)3 92 39 10 50
Facsimile: +61 (0)3 92 39 10 99
Dometic New Zealand Ltd.
Post Box 12011
1642 Penrose, Auckland
New Zealand
Service (New Zealand)
Telephone +64 (0)9 622 14 90
Facsimile +64 (0)9 622 15 73
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