Truma Combi D 6 AU User manual

Operating instructions Page 2
To be kept in the vehicle!
Truma Combi® D 6 AU

2
Truma Combi® D 6 AU
Table of contents
Symbols used ........................................................................ 2
Intended use .......................................................................... 2
Safety instructions ............................................................ 3
Function description ......................................................... 5
Fuel supply / quality .......................................................... 5
Operating instructions
Control panel ...................................................................... 5
Room temperature sensor ................................................ 5
P&T relief valve
(Pressure and temperature relief valve) ......................... 5
Drain valve .......................................................................... 6
Filling the hot water system ............................................ 6
Draining the hot water system ........................................ 6
Initial start-up ..................................................................... 6
Filling the fuel lines ............................................................... 6
Start-up ................................................................................ 6
Switching off ...................................................................... 6
Maintenance ....................................................................... 6
Fuses .................................................................................... 7
Disposal ............................................................................... 7
Technical data ..................................................................... 7
Dimensions ........................................................................... 7
Faults .................................................................................... 8
Troubleshooting guide (water supply) ................................... 8
Accessories ......................................................................... 8
Truma warranty policy ..................................................... 9
Trademark information
Truma Combi®, referred to as Combi below.
Symbols used
Symbol indicates potential dangers.
Note with information and tips.
Intended use
The Combi D 6 AU diesel heater is a warm-air heater with
integrated hot water sytem (10 litre volume). This unit was
designed for installation in motor homes and caravans. The
applicable regulations must be complied with when the
equipment is being installed in special vehicles and vehicles
for transporting hazardous goods.
1 Control panel
2 Room temperature sensor
3 Cold water connection
4 Hot water connection
5 Fuel connection
6 Hot air outlets
7 Recirculated air intake
8 Waste gas discharge
9 Exhaust air flue
10 Electronic control unit
11 Water container (10 litres)
12 Burner
13 Heat exchanger
14 Drain valve
15 Water pressure reducer (A and B)
16 P&T relief valve
14 15
2
2
3
5
7
8
9
11
10
4
12
13 6
1
A
B
16
Fig. 1

3
Safety instructions
In the event of a leak in the heater,
fuel supply or the exhaust duct:
– switch off heater,
– open windows and door,
– ask an expert to inspect the entire system!
Ensuring a safe operating environment
– The unit may be operated only with appropri-
ate Truma control panels and accessories.
– Danger of suffocation! To ensure dissipa-
tion of exhaust gases, operate the device
outdoors only. Never use in enclosed spaces
or tents or breathe in the exhaust gases.
– 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.
– 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 modify this appliance.
– Do not use any after market air filters or
air grills. The use of such components may
cause the unit to overheat.
– Keep flammable materials away from the ar-
ea in front of the hot air outlets. Never block
the hot air outlets.
– In order to avoid overheating of the
Truma Combi, keep the air inlets of the
Truma Combi, the air openings to the area
in which the Truma Combi heater is installed
and the spacing around the Truma Combi
heater free of obstruction.
– 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.
– Do not operate the heater anywhere where
flammable vapours or dust can form, e.g. in
the vicinity of a fuel, carbon, wood or cereal
storage facility or similar.
– 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 ma-
terials away from the vent.
– If fitting an isolation switch, the switch must
be installed in such a position that the heater
can not be switched off unintentionally. The
heater must always be turned off at the heat-
er control. The 12 V isolation switch should
only be used after the heater has com-
pleted its cool down cycle and has stopped
completely.
– A diesel heating system always needs more
power than a similar gas heating system.
If there is a requirement for autarky of the
same duration (service life without external
power supply), Truma recommends investi-
gating the possibility of retrofitting a larger
and / or second battery.
– Water may drip from the discharge pipe of
the P&T relief valve and this pipe must be
left open to the atmosphere.
– Any discharge pipe connected to the
P&T relief valve is to be installed in a con-
tinuously downward direction and in a frost
free ambient.
Obligations of the operator / vehicle owner
– The operator is responsible for the water
filled into the Truma Combi water container
and its quality.
– The vehicle owner is responsible for correct
operation of the Truma Combi.

4
– 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 vis-
ible to all users (e.g. on the wardrobe door)!
Ask Dometic Service to send you stickers, if
necessary.
– The system must comply with the respec-
tive regulations of the country in which it is
used. National regulations and rules must be
followed.
– The exhaust system must be inspected by a
qualified technician at regular intervals, not
exceeding two years.
– If the heater is not being used, always
drain the water if there is a risk of frost. No
warranty claims for frost damage will be
accepted.
– Ensure that the inside of the vehicle is suf-
ficiently 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 device may be used by children aged
8 years or above and by persons with re-
duced physical, sensory or mental capabili-
ties or lack of experience and / or knowledge,
provided that they are being supervised or
have been given instructions with regard to
the safe use of the device and have under-
stood the potential risks. Children must not
use the device as a toy.
– The exhaust gas double duct (exhaust gas
muffler and suction pipe) must be inspected
regularly, particularly following long jour-
neys, to check for any damage and to ensure
that the connection is sound; the same ap-
plies to the mounting of the heater and the
cowl.
Operation while driving
– The heater must not be used during fuelling,
or in enclosed car parks, in garages, or on
ferries.
– To prevent damage to the Truma Combi D
from spray water, such as when cleaning the
vehicle, do not spray water directly into the
wall cowl.
Safe handling of malfunctions
– If you notice unusual noises or smells,
switch the Truma Combi D off.
– Danger of fire / explosion if you attempt
to use a Truma Combi that has been dam-
aged by flooding or if the vehicle has
been involved in an accident. A damaged
Truma Combi must be repaired by an expert
or be replaced.
– Repairs to the heater may only be carried out
by an expert.
– 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 blow-back (misfire) always have
the exhaust duct checked by an expert.
Maintenance / Repairs / Cleaning
– The unit may only be repaired and cleaned
by an expert.
– Guarantee claims, warranty claims and ac-
ceptance 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 operat-
ing instructions.
It also becomes illegal to use the appliance,
and in some countries this even makes it il-
legal to use the vehicle.
– With a new Truma Combi D or if the unit
has not been used for some time, rinse all
hot/cold water hoses with drinking water
thoroughly before use.

5
Read the safety instructions and operating manual care-
fully 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 using for the first time, it is essential to flush
the entire water supply system with clean water. If the
heater is not being used, always drain the water if there is a
risk of frost. No warranty claims for frost damage will be
accepted.
Control panel
The control panel is described in a separate operating instruction.
Room temperature sensor
To measure the room temperature, an external room tempera-
ture sensor (2) 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.
2
Fig. 2
The temperature setting on the control panel depends on per-
sonal heating requirements and the design of the vehicle, and
must be determined individually.
P&T relief valve
(Pressure and temperature relief valve)
Risk of scalding injury from hot water and/or tamper-
ing with the P&T relief valve!
– Do not actuate the P&T relief valve as long as the
appliance is still hot.
– Do not place a plug or reducing coupling in the dis-
charge pipe (Fig. 3 - 16a) of the P&T relief valve.
– Do not operate the water heater without a
functioning P&T relief valve.
The P&T relief valve (16) is a safety component and must
not be removed for any reason other than replacement.
The P&T relief valve is not serviceable; if defective it must be
replaced (failure to reuse an old P&T relief valve). It must be
replaced by a certified service technician.
Tampering with the P&T relief valve will void the warranty.
16a
Fig. 3
Operating instructions
Function description
The Combi D 6 diesel heater AU is a warm-air heater with in-
tegrated hot water system (10 litre volume). The burner is fan-
assisted, which ensures that operation is problem-free, even
when on the move.
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.
– In hot water mode, the water is heated at the lowest burn-
er setting. Once the water temperature has been reached,
the burner switches off.
– In heating and hot water mode, the unit automatically
selects the required operating level according to the tem-
perature difference between the temperature set on the
control panel and the current room temperature. If the hot
water system has been filled, the water is automatically
heated as well. The water temperature depends on the se-
lected operating mode and the heater output.
Fuel supply / quality
– The heater requires diesel fuel, as per the Australian Fuel
Standard (Automotive Diesel). Operation with any form of
biodiesel is not permitted.
– When operational, the fuel display in the fuel tank must not
be allowed to drop to the “low fuel” mark.
In the event that the vehicle fuel tank runs empty, the open-
ing of the fuel removal duct is roughly at the same height as
the surface of the fuel. In this state, and in particular when
the fuel in the vehicle fuel tank slops around due to vehicle
movement, a large amount of air is sucked in. This leads to
an irregular supply of fuel to the heater. The heater burner is
unable to maintain clean combustion in this condition, lead-
ing to the formation of smoke and odours.

6
Drain valve
The 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 drain valve does not protect the water container
from frost damage.
c
b
a
d
Fig. 4
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 drain valve
– Move lever to position (c) – vertical. The water from the hot
water system drains through the drainage socket (d).
The drainage socket (d) of the drain valve must be free of
blockages (slush, ice, leaves, etc.) at all times so the water
can drain easily! No warranty claims for frost damage
will be accepted.
Closing the drain valve
– Move lever to position (a) or (b) – horizontal.
Filling the hot water system
Check whether the drain valve is closed (see “Closing the
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 hot water
system 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 hot water system, the hot water system also fills up
with water. To avoid frost damage, the hot water system
must be drained via the drain valve, even if it was not
operated.
In the event of frost, filling may be prevented by residual wa-
ter that has frozen. The hot water system can be thawed out
again by briefly starting it 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 280 kPa from occurring
in the hot water system.
Draining the hot water system
– Switch off the power for the water pump (either by the main
switch or the pump switch).
– Open hot water taps in kitchen and bathroom.
– Open drain valve:
Lever in vertical position, position (m).
The hot water system is now drained directly to the outside
via the drain valve. Place a bucket beneath the outlet to check
whether the water has completely drained away (10 litres).
There shall be no claims under guarantee for damage
caused by frost!
Initial start-up
(or when the fuel tank has run empty)
Filling the fuel lines
The heater normally has to be started up several times to fill
the fuel lines.
Connect unit to control panel to do this. The unit automati-
cally performs 2 start attempts (initial start and repeat) per
switch-on procedure with a run time of 2 minutes in each
case. If no flame is detected after the repeat start, the unit
switches to fault and has to be switched off and on again at
the control panel.
After a total of 15 unsuccessful starting attempts (initial
and repeat start) without forming a flame, the equipment
is blocked. To remove the block, please contact the Dometic
Service Centre (see www.truma.com).
Check fuel lines and connections for leaks after filling the fuel
lines.
Start-up
The interior can be heated with or without water, depending
on the setting.
– Check to make sure the cowl is unobstructed. Remove any
covers that may be present.
– Fill the hot water system with water if necessary (see “Fill-
ing the hot water system”).
– 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 min-
utes because of internal heater operations.
Always drain water if there is a risk of frost!

7
Maintenance
Only original Truma parts may be used for maintenance and
repair work.
– Even outside the season, the heater should be operated
once a month for about ten minutes.
– Clean installation area at least once per year, and have unit
checked for soiling and cleaned by an expert if necessary.
– The drain valve must be actuated regularly (at least twice
per year) in order to remove limescale deposits and to ensu-
re that it is not blocked.
Biofilm, deposits and limescale must be removed using
chemicals to protect the unit from infestation by microorgan-
isms. Only chloride-free products must be used in order to
prevent damage to the unit.
The effectiveness of the use of chemicals to combat microor-
ganisms in the unit can be increased by heating the water in
the hot water system to 70 °C at regular intervals.
– Set water temperature to 60 °C.
– Switch on unit.
Once the water in the water heater has reached a tem-
perature 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 withdrawn. The residual heat in the heat ex-
changer will heat the water up to 70 °C.
Fuses
The fuses are located in the electronic control unit, beneath
the connector cover. When replacing a fuse, be sure to use
the same type.
Device fuse: 10 A – slow – 5 x 20 mm (T 10 A)
Burner fuse: 20 A – slow – 6.3 x 32 mm
T 20 A
T 10 A
Fig. 5
Disposal
The heater unit must be disposed of in accordance with the
administrative regulations of the country in which it is in use.
National regulations and laws must be observed.
Technical data
(found by Truma Test conditions)
Protection type / protection class
IP21 / class I
Fuel
Fuel, as per the Australian Fuel Standard (Automotive Diesel).
Operation with any form of biodiesel is not permitted.
Water volume
10 litres
Maximum working water pressure
500 kPa
P&T relief valve setting
500 kPa – 99 °C – 10 kW
Heating up time from approx. 15 °C to approx. 60 °C
Hot water system approx. 20 minutes (measured according to
EN 15033)
Heater + hot water system approx. 80 min.
Pump pressure
max. 280 kPa
System pressure
max. 450 kPa
Rated thermal output (automatic output levels)
2000 / 4000 / 6000 W
Fuel consumption
220 – 630 ml/h (110 ml/h during normal operation with
moderate heat output of 1000 W)
Air delivery volume (free-blowing without hot-air pipe)
max. 287 m³/h
Current input at 12 V
Heater + hot water system 1.8 – 7 A (in regular operation, be-
tween “Off” and “lowest operating level” less than 1.8 A).
Heating hot water system without operational heater, max.1.8 A
Stand-by: approx. 0.001 A
Weight (without water)
Heater unit: 16.2 kg
Heater unit with
peripheral devices: 17.6 kg
Water pressure reducer
Flow range water: 0 – 10 litres/min.
Maximum inlet pressure: 700 kPa
Maximum outlet pressure: 200 kPa
E1 122R 000232
E1 10R 035277
Dimensions
450 mm 525 mm
300 mm
Fig. 6
The right to make technical modifications is reserved!

8
Faults
Faults – Heater
Descriptions of possible fault causes and a troubleshooting
guide can be found in the operating instructions for the con-
trol 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 / Rectification
Water taking an extremely
long time to heat up. Water container furred. / Descale water system (see
maintenance).
Water running away – hot
water system cannot be
filled.
Drain valve open. / Close Drain
valve.
Hot water system cannot
be drained, even though the
drain valve is open.
Drain valve drainage socket
closed. / Check opening for
soiling (slush, ice, leaves etc.)
and remove if necessary.
Water dripping/flowing
from drainage socket of
drain valve.
Water pressure too high. /
Check pump pressure (max.
280kPa). If the hot water sys-
tem is connected to a central
water supply (rural or urban
connection), a pressure reduc-
er must be used, which will
prevent pressures higher than
280 kPa from occurring.
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”).
If these measures do not resolve the fault, please con-
tact the nearest Dometic Service.
Accessories
Truma CP plus
Digital control panel Truma CP plus (part no. 36021-01)
with automatic air conditioning system for the iNet-capable
Trumaheaters Combi and Truma air conditioning systems
AventaEco, Aventa comfort (from serial number 24084022 –
04/2013), Saphir Comfort RC and Saphir compact (from serial
number 23091001 – 04/2012)
– The automatic air conditioning system automatically con-
trols the heater and the air conditioning system until the
required temperature is reached in the vehicle.
– With the Truma iNet Box extension, all TIN-Bus-capable
Truma devices can also be controlled via the Truma App.
Fig. 7
Truma iNet Box
The Truma iNet Box (part no. 36400-01) for simple network-
ing and control of Truma devices with a smartphone or tablet
computer using the app.
– Simple installation and start-up via the Truma App
– Can be extended with the update function, which ensures
that it is always up to date.
Fig. 8
Accessories (without picture) for control panel
– Cable available in different lengths

9
Truma warranty policy
The warranty is given by Dometic Pty Ltd, 6 Treforest Drive,
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
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.
– Warranty repairs can only be performed by authorised
service agents and under no circumstances will Dometic
reimburse repairs carried out by unauthorised persons.
Tampering with any part of the product by unauthorised
personnel will automatically void the warranty.
– The product must be used 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.
Important notice
Before calling a service technician please check carefully the
operating instructions, service booklet and warranty terms
and conditions. If the product fails for any of the reasons
detailed therein, or is faulty due to abuse, misuse or im-
proper 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. 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 manufacturer’s
instructions.
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 oth-
erwise are hereby excluded.

Notes

Notes

34020-00303 · 00 · 09/2016 ·
In Australia, always notify the Dometic Service Centre
if problems are encountered; in other countries the
relevant service partners should be contacted
(www.truma.com).
Having the equipment model and the serial number
ready (see type plate) will speed up processing.
Service (Australia)
Telephone:[phone]
Facsimile: [phone]
Dometic Pty Ltd
Building 3B,
Clayton Business Park
1508 Centre Road
Clayton, Victoria, 3168
Australia
Dometic New Zealand Ltd.
Post Box 12011
1642 Penrose, Auckland
New Zealand
Service (New Zealand)
Telephone [phone]
Facsimile [phone]
©