Operating instructions Page 2
Installation instructions Page 19
To be kept in the vehicle!
Truma AquaGo AU
LP Gas Instant Water Heater
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4a4 26 5
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2511a
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LED 1
LED 2
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LED 3
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Truma AquaGo AU instant water heater (appliance)
Overview / Designation of parts
Legend
1 Cold water connection 1/2 inch NPT
2 Hot water connection 1/2 inch NPT
3 Circulation line connection 1/2 inch NPT
(comfort plus model only)
4 Pressure relief valve
4a Test lever
5 Flue fan
6 Unit casing
7 Control unit
8 POWER switch
9 Latch
10 Flue duct
11 Easy Drain Lever
11a Water inlet filter
12 Gas pipe grommet (side)
13 Gas valve
14 Cover plate
15 Temperature stabiliser
16 Water flow sensor
17 Burner with manifold, orifice size 0.82mm
18 Circulation pump
19 Heat exchanger
20 Access door (assembly)
21 Turn lock
22 Webbing
23 Ventilation grille (air inlet, exhaust)
24 Grommet for 12 V cable
(power supply)
25 Type plate
26 Exhaust pressure switch
27 Control panel
LED 1 Power-ON LED 1– green
LED 2 Error code LED 2 – red
LED 3 Status LED 3 – yellow
Fig. 1 (Unit casing/Frame partially omitted)
Fig. 2 (rear view of appliance)
3
Trademark information
Truma AquaGo referred to as AquaGo below.
Truma AquaGo comfort AU referred to as
AquaGo comfort below.
Truma AquaGo comfort plus AU referred to as
AquaGo comfort plus below.
Intended use
The AquaGo instant water heater (appliance) may be used
only to heat tap water in recreational vehicles (RVs) that are
used for recreation, travel or camping.
RVs are recreational vehicles designed as temporary living
quarters for recreation, camping or travel use. Such vehicles
have their own power or are towed by another vehicle.
Prohibited use
Any use other than the intended use (see above) is prohibited.
Examples of prohibited use:
• Use in a marine environment.
• Use as part of a space heating system.
• Use in mobile homes.
• Use in food trucks or roadside food vending vehicles.
• Use in construction trailers
• Use as a pool heater
Glossary
electric antifreeze kit AquaGo electric antifreeze kit
appliance AquaGo instant water heater
AWG American Wire Gauge
control panel Control panel CP classic AquaGo
heating cartridge AquaGo electric antifreeze kit cartridge
MWG Metric Wire Gauge
Model
Truma AquaGo comfort AU (DLE6AC)
Truma AquaGo comfort plus AU (DLE6ACP)
Table of contents
Overview / Designation of parts ..................................... 2
Trademark information ..................................................... 3
Intended use ....................................................................... 3
Prohibited use .................................................................... 3
Glossary ............................................................................... 3
Model ................................................................................... 3
Consumer Safety Information
Safety symbols and signal words ................................... 4
Safety behaviour and practices ...................................... 4
Safety features ................................................................... 6
Operating instructions
How the appliance works ................................................. 7
Pressure relief valve .......................................................... 7
Access door ........................................................................ 8
Opening the access door ...................................................... 8
Removing the access door ................................................... 8
Closing the access door ........................................................ 8
Starting the appliance ....................................................... 9
Inspections before each use ................................................. 9
Operating procedures ........................................................... 9
Switching ON the appliance ................................................. 9
Operating modes (control panel) ........................................ 10
Description of the yellow status LED 3 .............................. 10
Switching OFF the appliance .............................................. 10
Operation in frost conditions ......................................... 11
Winterising ........................................................................ 11
Winterising the appliance ................................................... 11
Winterising the RV with a winterising fluid ........................ 11
AquaGo technical data .................................................... 12
Approval ............................................................................ 12
Maintenance ..................................................................... 13
Draining the water and cleaning the water inlet filter ........ 13
Decalcification .................................................................. 14
Decalcification frequency ................................................... 14
Performing decalcification .................................................. 14
Interrupting decalcification ................................................. 16
Accessories ....................................................................... 16
Troubleshooting ............................................................... 17
Truma warranty policy .................................................... 18
Installation Instructions
Safety behaviour and practices .................................... 19
Selecting a suitable location .......................................... 19
Preparing for installation ................................................ 19
Unpacking the appliance .................................................... 19
Preparing the installation site .............................................. 19
Preparing the gas connection ............................................. 20
– Gas side connection ......................................................... 20
– Gas rear connection ......................................................... 21
Preparing the water connection ......................................... 21
Preparing the 12 VDC electrical connection ....................... 21
Connection diagrams .......................................................... 22
Mounting the control panel ................................................ 23
Installing the appliance ................................................... 23
Gas connection ................................................................. 24
Connecting the gas line (gas side connection) ................... 24
Connecting the gas line (gas rear connection) ................... 25
Functional check .............................................................. 26
APPENDIX A – Error Codes ............................................ 27
APPENDIX B – Functional Diagram .............................. 29
APPENDIX C – Spare Parts (all models) ....................... 31
APPENDIX D – Electrical Connection Diagram .......... 33
APPENDIX E – Notes for painting the access door
and cover plate ...................................... 34
4
Safety symbols and signal words
This is the safety alert symbol. This symbol
alerts you to potential hazards that can kill or
hurt you and others.
indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
indicates a hazardous situation
which, if not avoided, could result in death or
serious injury.
indicates a hazardous situation
which, if not avoided, could result in minor or
moderate injury.
is used to address practices not re-
lated to physical injury.
Other important information or tips
Safety behaviour and practices
If the gas system is leaking or if there is a
smell of gas
• extinguish all open flames
• open windows and door
• close all shut-off valves and gas cylinders
• do not smoke
• do not activate any electric switches
• ask an expert to inspect the entire system!
Ensuring a safe operating environment
•
Suffocation through exhaust
gases. To ensure dissipation of exhaust gases, operate the appliance outdoors only.
– Never use in enclosed spaces or tents or
breathe in the exhaust gases.
– If installing an awning, make sure that the
exhaust system terminates outdoors.
– If you park the RV in an enclosed space,
such as a garage or repair shop:
· You must block the fuel supply.
· You must switch the appliance off at the
control panel.
Consumer Safety Information
• Keep the air inlet and exhaust outlet free
of obstructions in order to ensure clean
combustion.
• Do not place articles on or against the ap-
pliance. Do not lean any objects against
the water heater’s access door or place any
foreign objects within 61 cm (2 feet) of the
access door.
• Do not use or store flammable materials near
the appliance.
• Do not spray aerosols in the vicinity of the
appliance while it is in operation.
• Do not modify the appliance.
Responsibilities of the operator
• Avoid possible serious health issues caused
by electromagnetic radiation. All persons
with a pacemaker are prohibited from opening the access door and maintaining the appliance during operation.
• The operator is responsible for the water
filled into the appliance and its quality.
• 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 forklifts) must not be used, since
they would result in damage to the gas
system.
• Gas systems and pressure regulators must
comply with the technical and administrative
regulations of the country in which the appliance is used (AS/NZS 5601.2 – LP Gas installations in caravans and boats for non-propulsive purposes (“LP Gas installations”)).
• For your own safety it is absolutely necessary to have the complete gas installation
regularly checked by an expert (at least every
2 years). The vehicle owner is always responsible for arranging the gas inspection.
5
Safe operation
• Use only with propane gas (in accordance
with AS 4670).
• The nominal gas system pressure must be
2.75 kPa.
• LP tanks must be filled by a qualified gas
supplier only.
• Hot water can be dangerous, especially for
infants, children, the elderly or infirm. It can
cause severe burns. Therefore:
– Never actuate the pressure reliefvalve
(Fig.1 – 4 ) as long as the appliance is still
hot.
– Never actuate the Easy Drain Lever
(Fig. 1 – 11) as long as the appliance is under water pressure and/or still hot.
• Always check the water temperature before
entering a shower or bath.
• How long before hot water causes skin
damage?
Temperature °C Time before skin becomes scalded
68 1 second
64 2 seconds
60 5 seconds
56 15 seconds
52 1 minute
51 3 minutes
48 5 minutes
37 safe bathing temperature
Source: Moritz, A.R. / Herriques, F.C.: Studies of thermal injuries: the relative importance of time and surface temperature in causation of cutaneous burns
A. J. Pathol 1947; 23: 695 – 720
• The water pressure on the inlet side must be
limited to 450 kPa, otherwise internal components of the appliance will be damaged.
On (city) water connections with a pressure
higher than 450 kPa a pressure regulator is
strongly recommended.
While driving
• To avoid damage, make sure the access door
(Fig. 1 – 20) to the appliance is closed before
moving the RV, as follows:
– Turn lock is engaged.
– Access door is flush with the cover plate.
• Shut OFF gas and the LP tank when moving
the RV. This disables all gas appliances and
pilot lights. Gas appliances must never be
operated while the vehicle is in motion.
• Shut OFF the appliance when refueling or
pumping gas, in multi-storey car parks, in
garages or on ferries.
• To avoid damage, make sure no spray water
enters the appliance when cleaning the RV,
e.g., do not spray directly into the openings/
ventilation grille.
Safe handling of malfunctions
• Switch OFF the gas supply and the appliance:
– if anything seems to be out of the ordinary.
– if you smell gas.
•
Fire / explosion if you attempt
to use an appliance that has been damaged
by flooding or if the vehicle has been involved
in an accident. A damaged appliance must
be repaired by an expert or be replaced.
• Only carry out repairs yourself if the solution
is described in the troubleshooting guide of
this manual.
• A damaged appliance may have to be replaced with a new one.
6
Safe maintenance and repair
• Repairs may only be carried out by an expert.
• Children must not carry out maintenance,
repair or cleaning work.
• Before accessing terminals, please secure all
supply circuits (i.e. 12 V) and make sure that
the gas supply is securely turned off.
• Any work involving connection or interconnecting wiring must be carried out by a licensed electrician.
• Only use AquaGo decalcification tablets to
decalcify the appliance to avoid damage and
the voiding of your warranty.
– Never use vinegar.
– The use of non-Truma-approved substances
for decalcification can cause chemical reactions and produce hazardous substances
that could enter the drinking water.
• Any alteration to the appliance or its controls
can cause unforeseen serious hazards and
will void the warranty.
• After a long period of winterisation: Flush all
hot/cold water hoses and the appliance thoroughly with drinking water before using it.
• Keep the appliance free of foreign objects,
e.g., leaves, animals, spiderwebs, and keep
the area around free of snow and ice. The
appliance will not function properly if the intake air or exhaust terminal is obstructed.
Safety features
The appliance is equipped with the following safety devices:
Flame monitoring
If the flame goes out, the gas supply to the burner is switched
off (after 3 failed restarts).
Low-voltage (over-voltage) shutdown
If the voltage drops below 10 VDC (or rises above16.4 VDC),
the appliance shuts off.
Overcurrent protection
If there is a short circuit in the appliance (>10A), a fuse on
the control unit is activated and the appliance is switched off.
Monitoring of the flue fan
If there is a failure of the flue fan, the gas supply to the burner
is switched off.
Monitoring of hot water temperature
A water over temperature switch avoids excessively high water temperatures in case of a malfunction.
7
Operating instructions
Read and follow the “Consumer Safety Instructions” before operating the appliance.
Scalding injuries caused by hot water!
Water temperatures over 52 ºC can cause severe burns or
scalding and in extreme cases even death.
• Before using the hot water tap or using the shower, allow
the hot water to run until the water temperature no longer
increases.
• Test the temperature of the water before placing a child in
the bath or shower.
• Do not leave a child or an infirm person in the bath
unsupervised.
How the appliance works
The appliance was developed exclusively for use in recreational
vehicles (RVs).
The appliance is connected between the vehicle’s fresh water
supply and its hot water system.
It is powered by propane and a 12 VDC power supply. The
ventilation grid on the access door allows combustion air to
flow into the appliance and exhaust gas to flow out.
When the appliance is switched on, the tap water will be
heated on-demand:
• A volume-flow sensor in the appliance detects when the hot
water tap has been opened and the volume flow is greater
than approximately 1.5 litres/min. The burner then starts
automatically.
• The burner control continously adjusts the heater output
based on volume flow and inlet water temperature, so that
the temperature at the hot water outlet is approximately
49°C. A temperature stabiliser is also installed in the appliance to minimise fluctuations of the outlet temperature.
• After some time the maximum temperature at the tap or
in the shower is reached. The length of time will depend
on the model and variations in the water system (length of
pipes, insulation, circulation line, etc.). Like in a home shower, a comfortable water temperature at the shower head is
reached by mixing in cold water.
• When the volume flow is less than approximately
1.5 litres/min or the tap is closed, the burner is
automatically switched off.
The AquaGo is equipped with a circulation pump. The circulation pump as well as the burner are switched on automatically
by the control unit in order to keep the water temperature
above 39 °C in “COMFORT” mode and 5°C in “ECO” mode.
Risk of damage in frost conditions.
Refer to “Operation in frost conditions” on Page11.
Pressure relief valve
Scalding injury from hot water and/or tampering with
the pressure relief valve!
• Never actuate the pressure relief valve as long as the appliance is still hot.
• Do not place a plug or reducing coupling on the outlet
part of the valve
The pressure relief valve is a safety component and must
not be removed for any reason other than replacement.
• The pressure relief valve is not serviceable; if defective, it
must be replaced. It must be replaced by a Truma certified
service technician.
Tampering with the pressure relief valve will void the warranty.
4a
4
4b
Fig. 3
4 Pressure relief valve
4a Lever in “valve closed during operation” position
4b Lever in “open” position
8
Access door
Opening the access door
1. Turn the turn lock counterclockwise to the vertical position.
open
Fig. 4
• The access door can be opened in two different
positions:
– Position is the maximum opening width for
switching the appliance on or off.
– Position is the starting position for removing
the access door.
Damage to the hinge!
• Do not try to remove the access door in Position . Position is the maximum opening width of the access door.
• Only remove the access door in Position .
2. Open the access door to Position .
Fig. 5
Removing the access door
1. Open the access door to Position .
2. Move the access door upwards to remove it.
I
II
Fig. 6
Closing the access door
Damage to the access door and the RV if the access
door is not closed properly!
• Make sure that the access door is flush with the cover
plate when closed.
1. If removed, insert the access door into the cover plate.
2. Make sure that the webbing is not pinched between the access door and the cover plate.
3. Press the access door against the cover plate.
4. Turn the turn lock clockwise
into the horizontal position.
close
Fig. 7
9
Starting the appliance
Danger of over-temperature and toxic exhaust gases!
• Use with propane gas only. Butane or any mixtures containing more than 10% butane must not be used.
• Keep the air inlet and exhaust gas outlet free of obstructions. Do not lean any objects against the appliance’s
access door or place any foreign objects within 61 cm of
the access door.
Danger of combustion, personal injury and damage to
RV!
• Keep the area around the appliance free from combustible
materials, petrol, and other flammable vapours or liquids.
• Switch the gas supply and the appliance off:
• if anything seems to be out of the ordinary.
• if you smell gas.
• if you move the RV.
• before entering a service station.
• before entering a tunnel.
Inspections before each use
Check the appliance for the following points before each use.
In case of damage, contact an authorised Truma service provider and do not operate the appliance.
1. Check for visible damage, e.g., on the cover plate or access
door.
2. Provide adequate quantities of propane gas and fresh water.
3. Switch ON and check the 12 V power supply of your RV.
4. Check that the access door of the appliance is closed.
5. Keep the appliance free of foreign objects, e.g., leaves, animals, spiderwebs, and keep the area around free of snow
and ice. The appliance will not function properly if the intake
air or exhaust terminal is obstructed.
Operating procedures
Risk of damage in frost conditions.
In frost conditions, ambient temperatures below 4°C, there
is a risk that water in pipes, taps and appliances could
freeze. This can cause considerable damage.
• Before you fill water into appliances and parts that transport water, you must heat the installation area sufficiently
so that the water cannot freeze.
Proceed as follows to fill the appliance with water:
1. Close open bypass lines (if present). Insert the water inlet filter or heating cartridge – if removed. See “Draining the water and cleaning the water inlet filter” on Page13, steps
2, 7, 9 – 11.
2. Turn on fresh water supply or switch on water pump.
3. Fill the water system.
• Open all water-release points, e.g., cold and hot water
taps, showers, toilets.
It is important that you bleed the water system before starting the appliance.
– Once water flows continously, the water system is vented.
Close the water-release points.
Start the appliance as follows:
4. Make sure that the propane gas supply is turned on.
5. Switch on the 12 V power supply (RV).
6. Open the access door (refer to “Opening the access door”
on Page8).
7. Switch on the appliance at the POWER switch (refer to
“Switching ON the appliance” on Page9).
8.
Select the desired operating mode (refer to “Operating
modes (control panel)” on Page10.
9. Close the access door (refer to “Closing the access door”
on Page8).
Scalding injuries caused by hot water!
Water temperatures over 52 ºC can cause severe burns or
scalding and in extreme cases even death.
• Before using the hot water tap or using the shower, allow
the hot water to run until the water temperature no longer
increases.
• Test the temperature of the water before placing a child in
the bath or shower.
• Do not leave a child or an infirm person in the bath
unsupervised.
• There may be a variation between the temperature
delivered from the appliance and the temperature
at the tap due to water conditions or the length of
pipe from the appliance.
• The presence of a flow restrictor in the hot water
line may Iimit the water flow.
10. How to use hot water:
• To obtain the desired water temperature at the tap or in
the shower, mix cold and hot water.
• Particularly when showering, wait until the water temperature has stabilised before entering or allowing other
people or animals to enter the shower.
Switching ON the appliance
1. Open the access door (refer to “Opening the access door”
on Page8).
2. To switch on the appliance, switch the POWER
switch (Fig. 8 – 8) to one of the two “ON” positions.
Both ON positions on the POWER switch have the
same function. Choose your preferred position.
• When the green power ON LED 1 (Fig. 8 – LED 1) is lit,
the appliance is switched on.
• If the red error code LED 2 (Fig. 8 – LED 2) is lit / flashes,
there is a fault or warning. (refer to “APPENDIX A – Error
Codes” on Page27).
8
LED 1
LED 2
Power
Power
Fig. 8
• The appliance is now ready for using the control panel inside
your vehicle (refer to “Operating modes (control panel)” on
Page10).
10
Operating modes (control panel)
A control panel to select the operating mode is included with
the delivery.
LED 3
Rotary switch
O
Eco
Clean
Fig. 9
With the rotary switch (Fig. 9) you can choose between the
following operating modes:
Sign Operating mode / Description
ECO
The appliance is now running in energy-saving mode.
• Water temperature at outlet is approximately 49 °C.
• Prevention of freezing by using propane gas. The
temperature in the appliance is automatically
kept above 5 °C.
• During operation, the yellow status LED 3 is lit.
COMFORT
The appliance is now running in a mode that pro-
vides rapid availability of hot water.
• Water temperature at outlet is approximately 49 °C.
• Standby heat.
The temperature in the appliance is automatically
kept above 39 ºC.
• During operation, the yellow status LED 3 is lit.
Off
Stand-by. The appliance is not running in any operating mode.
• The yellow status LED 3 is off.
To switch off the POWER and gas supply refer
to “Switching OFF the appliance” on Page10.
ANTIFREEZE
Prevention of freezing using 12 VDC electricity:
Operating mode with installed electric anti-
freeze kit (available as an accessory) and appliance switched on. The temperature in the appliance is automatically kept above 5 °C.
• During operation, the yellow status LED 3 is lit.
Clean DECALCIFICATION
See “Decalcification” on Page14.
For safety reasons, after 30 seconds the de-
calcification process cannot be stopped until
the system has been rinsed in accordance with the
instructions. See “Interrupting decalcification” on
Page16
Description of the yellow status LED 3
(see Fig. 9 – LED 3)
Signal Meaning
LED 3 lit – Appliance is switched on
LED 3 is off – Appliance is switched off.
– See “Troubleshooting” on Page17.
Every 7 s, LED 3 is
interrupted for 1 s
– The appliance must be decalcified
LED 3 flashes slowly
1 s on, 1 s off
– Decalcification mode has been
activated
LED 3 flashes
quickly
– Before you use the water system
you must rinse it (see step f) “Rinsing the water system” on Page 15).
LED 3 flashes
2x briefly after a
break.
– There is a fault in the appliance.
The exact fault diagnosis must be
determined via error LED 2. Refer
to “APPENDIX A – Error Codes” on
Page27.
– Risk of freezing, the temperature in
the appliance is below 3 °C.
Switching OFF the appliance
1. Set the control panel to “Off”.
2. Open the access door (refer to “Opening the access door”
on Page8).
3. Switch off the appliance at the POWER switch (Fig. 8).
The green Power-ON LED 1 (Fig. 8) extinguishes.
4. Close the access door (refer to “Closing the access door”
on Page8).
5. If the appliance is not needed, turn off the gas supply to the
appliance.
If you intend to put the RV into storage or turn off
the appliance during freezing temperatures, refer to
“Winterising” on Page11.
11
Operation in frost conditions
(Ambient temperatures below 4°C)
Risk of damage in frost conditions.
In frost conditions, ambient temperatures below 4°C, there
is a risk that water in pipes, taps and appliances could freeze.
This can cause considerable damage.
• If the appliance is not to be used in frost conditions, you
must winterise the appliance. Refer to “Winterising the
appliance” on Page11.
• Winter operation will not protect the RV’s entire water
system. Water lines, taps, water tanks and the external
water valves and the vehicle must be heated separately.
• The RV must be designed for winter use/freezing
conditions.
• The water pipes in the RV must be ice-free to operate the
AquaGo in winter. Otherwise, there is no water flow and
the appliance does not start.
When the vehicle is standing, to -20°C
• The appliance has a built-in thermostat that will start the
burner and the circulation pump whenever the temperature
in the appliance falls below +5°C. The burner will automatically shut off when it senses a temperature above 44°C.
•
For the appliance to operate properly, you
must ensure a constant supply of power (12 V), propane
gas, sufficient water in the system. You must leave the appliance powered “ON”. The operating mode must be “ECO”
or “COMFORT”. The water system must be bled so that the
circulation pump works.
•
If the vehicle is standing and ambient temperatures are below -20°C, the appliance must not be operated
and must be winterised. To winterise the appliance (refer to
“Winterising” on Page11).
While driving (or if there is no gas supply), to -20 °C
•
Gas must not be used for heating while the vehicle is in motion. Ask your dealer / vehicle manufacturer
about options for heating your RV while driving.
• An electric antifreeze kit is available as an accessory (ask
your dealer). With this kit, the appliance can be kept frostfree while you are driving or if there is no gas supply (to
ambient temperatures of -20 °C). The electric antifreeze kit
includes detailed instructions.
–
While the vehicle is in motion and at ambient temperatures below -20 °C the appliance must not be
operated and must be winterised. To winterise the appliance (refer to “Winterising” on Page11).
Winterising
Severe damage to the water system components and
the appliance!
Any damage caused by freezing or an unsuitable winterising fluid will not be covered by warranty.
• Follow the recommendations below if the appliance will
be stored under freezing conditions or for an extended
period of time.
• Winterise the appliance at the start of the winter season
or before travelling to a location where freezing conditions
are likely.
If your RV is equipped with a bypass around the appliance,
separate the appliance from the water system with the
bypass.
Winterising the appliance
To winterise the appliance, you must drain all water from the
appliance. To do this we advise the following steps:
• Remove the water inlet filter or heating cartridge. See
“Draining the water and cleaning the water inlet filter” on
Page13, steps 1to 8.
• Let water completely drain from the appliance. This can
take several minutes.
• Do not insert the water inlet filter or heating cartridge into
the appliance during winter – if the appliance is not used.
•
Danger of crushing/pinching of fin-
gers when the Easy Drain Lever is closed! Never put
fingers between the Easy Drain Lever and latch.
• Close the Easy Drain Lever and the access door.
Once the water has been drained, the appliance is protected
against freezing conditions.
Winterising the RV with a winterising fluid
• Winterising the RV with a winterising fluid is only
possible with an installed bypass kit (not in scope
of delivery)
• Refer to the connection diagram “Connection diagrams” on Page22 for all letters referred to in
the following description.
Winterising AquaGo comfort
1. Close valves A and B.
2. Open valve C.
3. Drain the appliance (see “Draining the water and cleaning
the water inlet filter” on Page13).
4. Flush the RV’s water system with a suitable winterising fluid
according to the supplier’s or RV manufacturer’s guidelines.
Winterising AquaGo comfort plus
1. Close valves A, B and E.
2. Make sure that valve D remains in the closed position.
3. Open valve C.
4. Drain the appliance (see “Draining the water and cleaning
the water inlet filter” on Page13).
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