onsen 10L User manual

10L
OPERATING MANUAL
GUIDE D’UTILISATION
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ONSENPRODUCTS.CA
800.996.5559800.996.5559

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INDEX
Safety Information………………………...............................................3
Safety Precautions………………………...............................................5
How It Works……………………...........................................................6
Getting Started……………………........................................................7
Use and Operation……………………..................................................9
Adjusting the Water Temperature ……………..............................11
Technical Specications .………....................................................12
Draining the Water Heater…………...............................................14
Troubleshooting……….................................................................15
Support…………..............................................................................18
Additional Accessories………….....................................................18
Thank you for purchasing the
ONSEN 10L PORTABLE TANKLESS WATER HEATER
Before using this gas-powered water heater, it is extremely important to
read all of the safety and operation instructions provided in this Operating
Manual to ensure that you can enjoy the Onsen 10L safely and responsibly.
If you have any questions about how to use this water heater, please con-
tact Onsen at [email protected] or 800-996-5559.

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ENGLISH
Your safety and the safety of others is extremely important in the installa-
tion, use and servicing of this water heater. Safety-related messages, warn-
ings and instructions have been provided in this Operating Manual and the
labels axed to the water heater to warn you and others of potential injury
hazards. Read and obey all safety messages and instructions throughout
this Operating Manual.
DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or injury.
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or injury.
CAUTION indicates a potentially hazardous situation
which, if not avoided, could result in minor or moderate
injury.
THIS IS THE SAFETY ALERT SYMBOL. IT IS USED TO ALERT
YOU TO POTENTIAL PERSONAL INJURY HAZARDS. OBEY ALL
SAFETY MESSAGES THAT FOLLOW THIS SYMBOL TO AVOID
POSSIBLE INJURY OR DEATH.
DANGER
WARNING
CAUTION
PLEASE MAKE SURE TO READ ALL INSTRUCTIONS
BEFORE USING THIS WATER HEATER
SAFETY INFORMATION

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If the information in these instructions is not followed
exactly, a re or explosion may result causing property
damage, personal injury, or death.
Keep the area around the water heater clear and free from combusti-
ble materials, gasoline, and other ammable vapors and liquids.
Before operating any gas appliance, smell all around the appliance
area for gas. Be sure to smell next to the oor because Liquid Pro-
pane Gas is heavier than air and will settle on the oor.
Liquid Propane Gas is heavier than air and will accumulate at the
lowest points in the event of a leak which sometimes makes it di-
cult to detect at nose level. It is highly recommended to install a gas
detector near ground level to detect gas leaks.
This water heater is capable of producing scalding water tempera-
tures. Always check the outgoing water temperature before use.
Hot exhaust and casing may cause serious burns. Keep away from
the water heater. Keep small children away from the water heater.
If any of the instructions contained in this Operating Manual are un-
clear to you, contact a trained and qualied professional to perform
the installation.
GENERAL GAS APPLIANCE WARNINGS AND BEST PRACTICES
WARNING

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ENGLISH
SAFETY PRECAUTIONS
THIS WATER HEATER IS FOR OUTDOOR USE ONLY.
THIS WATER HEATER IS NOT INTENDED FOR PERMANENT INSTALLA-
TION AND CANNOT BE PERMANENTLY PLUMBED IN ANY WAY.
WHEN NOT IN USE, THE WATER HEATER MUST BE DISCONNECTED
AND STORED IN A WARM AND DRY PLACE.
Always use a soapy solution on the gas ttings and connections to de-
tect gas leaks.
Do not operate the water heater with Natural Gas. Use only Liquid Pro-
pane Gas. Do not try to convert this water heater to Natural Gas.
If a gas odour is detected, turn o the gas valve on the gas tank imme-
diately.
Do not operate the water heater in strong wind conditions.
Do not leave the water heater unattended when turned on.
Never mount the water heater onto a combustible surface or wall.
Any alteration to the water heater or its controls can be dangerous and
will void the warranty.
Always check the outgoing water temperature before showering or
bathing.

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The Onsen 10L Portable Tankless Water
Heater uses Liquid Propane Gas to heat
water by burning a ame on the copper
heat exchanger. The incoming water is
heated when it circulates through the
heat exchanger before being directed
to the water outlet (showerhead). The
temperature of the exiting water can be
increased by turning the gas knob on the
water heater, which increases the ame
output, or by turning the water knob to
decrease water ow.
The water heater is equipped with an
electronic ignition system that uses 2 “D”
type batteries or 12 volt for ignition. The
ignition system is pressure controlled,
which means the ame will only ignite
if the water circulating inside has a
sustained pressure of 10 to 80 PSI. When
the water ow is cut o (by shutting o the
water source or turning the showerhead
to the OFF position), the ame shuts o
automatically.
HOW IT WORKS

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ENGLISH
GETTING STARTED
Check the box for any damage sustained during shipment.
Check that all components and accessories are included in the box:
Water heater
Gas hose & regulator assembly (factory connected to water heater)
Shower set
Garden hose adapter
Hardware pack
12 volt battery alligator clips
Connect the water inlet:
If connecting a standard garden hose to the water inlet of the water
heater, apply Teon to the threads of the water inlet to ensure a
sealed connection and to prevent leaking.
Attach the 1/2” to 3/4” brass garden hose adapter (included in the
box) to the Teon coated threads of the water inlet.
Connect the garden hose to the garden hose adapter.
Connect the water outlet:
Connect the shower set hose to the water outlet of the water heater.
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Check the gas inlet:
Check the connection of the gas regulator hose to the 3/8” gas
compression tting of the gas inlet of the water heater (the gas
regulator hose should already be connected to the gas tting). If
necessary, use a wrench to ensure a secure connection. DO NOT
OVERTIGHTEN AS THIS MAY CAUSE A CRACK IN THE GAS CONNEC-
TION AND RESULT IN A GAS LEAK.
(WARNING: Do not apply gas tape, compound or other sealant to the
threads of the 3/8” gas compression tting. The tting is ared and
does not require sealant. Applying sealant to the threads of the tting
may prevent a secure connection, resulting in a gas leak).
Install batteries / connect 12 volt ignition:
If using 2 “D” type batteries for ignition, install the batteries in the
battery box located on the bottom right of the water heater. Alter-
natively, if using 12 volt for ignition, connect the circular connector
of the included 12 volt alligator clip to the 12 volt input connection
at the bottom of the water heater. Next, connect the alligator clips
to a 12 volt battery.
When using both batteries and 12 volt for ignition, the 12 volt takes
priority.
Hang the water heater:
Hang the water heater using the bottom and top brackets onto the
included mounting screws.
Connect 20 lb propane tank:
Connect the gas regulator hose to a 20 lb propane tank. DO NOT
OPEN THE TANK’S GAS VALVE YET.
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ENGLISH
USE AND OPERATION
Always check for gas leaks before using this water
heater. To do so, spray a mixed solution of water and
soap on the gas inlet connection. If bubbles start to form,
close the gas valve and seal the gas connection properly
before repeating the gas leak test.
This water heater comes with a ½” – ⅜” gas com-
pression tting already connected to the ½” gas in-
let during the assembly portion of the manufacturing
process. In the event that the gas compression tting
has been removed, make sure to connect it by apply-
ing gas tape or compound to the ½” gas inlet threads
to ensure the connection is sealed and to prevent
a gas leak. ALWAYS CHECK FOR GAS LEAKS AFTER
APPLYING GAS TAPE / COMPOUND.
Set the water regulator knob to maximum setting (turn to the left).
Set the gas regulator knob to minimum setting (turn to the left).
Ensure the showerhead button is in the OFF position.
Turn on the incoming water supply and wait for the water lines to
completely ll with water (water pressure must be between 10 – 80
PSI for ignition to occur).
Open the gas valve on the propane tank.
IMPORTANT: Check for gas leaks by spraying a mixed solution of wa-
ter and soap on the gas inlet connection. If bubbles start to form, close
the gas valve and seal the gas connection properly before repeating
the gas leak test.
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DANGER
DANGER

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Push button located at the bottom of the water heater to the ON po-
sition.
Push the showerhead button to the ON position (this will allow for
water to circulate inside the water heater and kick start the ignition
sequence).
You will hear a series of clicks followed by the sound of the ame
igniting, similar to an outdoor grill. If the ame does not ignite after 5
seconds, shut o the water supply and close the gas valve. Go to Trou-
bleshooting on page 15 of this Operating Manual for advice.
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IMPORTANT TO KNOW
This water heater is equipped with a wa-
ter temperature sensor that will turn o
the ame when 60 °C is reached.
This water heater is equipped with a 20
minute safety shut-o timer that will au-
tomatically turn o the ame when this
timeframe is reached. To start the water
heater again, push the showerhead but-
ton OFF and ON to reignite the ame.

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ENGLISH
ADJUSTING THE WATER TEMPERATURE
WARNING: THIS WATER HEATER MAY PRODUCE SCALDING WATER TEM-
PERATURES. USE EXTREME CAUTION WHEN OPERATING THIS WATER
HEATER.
Follow these steps to adjust the outgoing water temperature:
Set the water heater to the lowest setting available by turning the
water regulator knob to maximum and the gas regulator knob to min-
imum. Carefully check the water temperature.
To raise the water temperature, turn the gas knob slowly towards
maximum, checking the water temperature often. Wait several sec-
onds after turning the gas knob before checking the temperature.
To further raise the water temperature once the gas knob is at max-
imum, turn the water knob slowly towards minimum, checking the
water temperature often until the desired temperature is achieved.
The digital screen between the gas and water knobs displays the tem-
perature of the outgoing water. Adjust the gas and water knobs to
achieve the desired temperature.
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TECHNICAL SPECIFICATIONS
Flue
Ignition Pin 2
Water Control
Knob
Battery Box
Drain Valve
Water Inlet
Microswitch
Back Shell
230 °C
Temperature
Sensor
Gas / Water Valve
Assembly
Gas Control
Knob
Gas Burner
Ignition Pin 1
Flame Cover
Ignition
Controller
Flame Sensor
Solenoid
Water Outlet
Gas Inlet
Heat Exchanger
60 °C Water
Temperature Sensor

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ENGLISH
ONSEN 10L PORTABLE TANKLESS WATER HEATER
Fuel Type LPG (Liquid Propane Gas)
Model 10L
Activation Flow Rate 10 – 80 PSI
BTU/h 75 000
Gas Pressure Rating 11.24” WC
Ignition 2 “D” batteries / 12 volt
Protections Anti-dry combustion protection, over-pressure,
overheating and ame-out protection
Weight 19 lbs
Dimensions 22.5 x 13.5 x 7 in.
Pipe Fittings 1/2” incoming / outgoing water & gas
Model Gas
Setting
3.0 LPM /
0.8 GPM
3.8 LPM /
1.0 GPM
6.0 LPM /
1.6 GPM
7.6 LPM /
2.0 GPM
10.0 LPM /
2.6 GPM
Onsen
10L
Highest 70 °C / 125 °F 56 °C / 101 °F 32 °C / 58 °F 26 °C / 47 °F 14 °C / 25 °F
Lowest 25 °C / 45 °F 21 °C / 38 °F 18 °C / 32.5 °F 15 °C / 27 °F 9 °C / 16 °F
TEMPERATURE INCREASE BASED ON FLOW RATE:

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DRAINING THE WATER HEATER
Freeze damage is the most common defect aecting portable water heat-
ers and is not covered by the warranty. Freeze damage can easily be pre-
vented by manually draining the water heater and storing it in a warm place
when not in use.
During freezing temperatures, ensure the water heater is properly drained
by following these steps:
Shut o the incoming water supply and the gas supply.
Use a at-head screwdriver to turn the drain valve stem (located at
the bottom of the water heater) counter- clockwise until water starts
to drain.
Disconnect the water inlet and outlet lines.
Using an air compressor, blow compressed air into the water inlet to
drain any excess water remaining in the heat exchanger piping. This
ensures the water heater is completely drained of water and will pre-
vent the internal piping from freezing and possibly bursting in cold
temperatures.
Store in a warm area.
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ENGLISH
TROUBLESHOOTING
WATER HEATER DOES NOT TURN ON AND NO AUDIBLE CLICKS
Ensure the ON/OFF switch at the bottom of the water heater is in the
ON position.
Ensure the 2 “D” batteries are in working condition and inserted proper-
ly in the correct position. If using the 12 volt feature for ignition, ensure
the 12 volt accessory is connected properly on both ends (water heater
and 12 volt power source). Ensure the 12 volt power source (ex: 12 volt
battery) is not depleted and working properly.
Ensure the incoming water hose is connected to the water inlet of the
water heater and the outgoing water hose (shower set) is connected to
the water outlet. The water heater will not ignite if the connections are
reversed.
Check for debris in the water heater’s water inlet. The presence of debris
in the water inlet screen may aect the incoming water pressure, which
could prevent the ame from igniting.
Verify the water pressure. The primary cause of non-ignition is insu-
cient water pressure. The water heater requires a minimum 10 PSI of
sustained water pressure to ignite the burner. Municipal water pressure
is commonly rated at 60 PSI while most water pumps are rated at 40 –
60 PSI.
If using a water pump for water pressure, try connecting the water heat-
er to municipal water pressure instead. Water pumps can sometimes
provide mixed results based on the specications and the connection

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conguration between the pump and water heater. Connecting the wa-
ter heater to a dierent water pressure source is the best way to deter-
mine if the problem is due to a conguration issue or a defective water
heater.
Check for any possible disconnected wires inside the water heater,
which can sometimes occur during shipping. If a wire is disconnected,
there will be no audible clicking sound from the ignition pins. To check
the wires, ensure the gas supply is turned o, pull o the gas and water
regulator knobs, and remove the screws holding the front panel in place.
Remove the front panel and locate the disconnected wires toward the
bottom of the water heater.
The ignition controller may be defective. Please contact Onsen at:
[email protected] or 800-996-5559.
WATER HEATER DOES NOT TURN ON BUT CLICKS ARE AUDIBLE
Ensure the propane tank is not depleted.
Check for debris in the water heater’s gas inlet and the opening of the
gas regulator hose connected to the inlet. The presence of debris may
prevent gas from owing normally into the water heater.
The solenoid may be defective. Please contact Onsen at:
[email protected] or 800-996-5559.
WATER HEATER TURNS OFF AFTER APPROXIMATELY 10 SECONDS
The water temperature sensor may be defective. Please contact Onsen
at [email protected] or 800-996-5559.

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ENGLISH
WATER HEATER TURNS OFF AT VARIOUS TIME INTERVALS
The water heater is equipped with a water temperature sensor that, for
safety purposes, will turn o the ame when 60 °C is reached. To restart
the water heater, turn the showerhead to the OFF position to stop the
water from owing and then turn the shower head to the ON position to
re-activate water ow and the unit will restart normally.
The water heater is equipped with a 20 minute safety shut-o timer that
will automatically extinguish the ame when this timeframe is reached.
To start the water heater again, push the showerhead button OFF and
ON to reignite the ame.
In high wind environments, the ame may be extinguished by wind en-
tering the casing. Test the water heater in an area with little to no wind.
Verify the water heater is connected to a sustained 10 – 80 PSI water
pressure source. Sudden drops in water pressure by a water pump or
municipal water source may cause the ame to be extinguished. Test
the water heater by connecting to an alternate water pressure source.
If the water heater operates normally then, it means that the irregular
water pressure in the previous setup is at fault.
Sustained water pressure may be aected when a water pump is used
for two applications simultaneously (ex: cold water line and hot water
line via the water heater), splitting the pressure output in half. In that
case, the water pressure may not be sucient for ignition to occur. Test
by connecting the pump to the water heater ONLY. If the water heater
operates normally then, it means that the insucient water pressure in
the previous setup is at fault.

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SUPPORT
ADDITIONAL ACCESSORIES
For support in French or English contact Onsen at :
[email protected] or 800-996-5559.
Hand Cart (hard rubber or pneumatic wheels)

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ENGLISH
Cigarette Lighter Converter 110V to 12V
Male Cigarette Plug 12V
Garden Hose Brass Quick Connectors (4 pack)

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Gas Quick Connector
Pipetite Pipe Joint Compound Stick
Gas Regulator & Hose for
16oz Propane Canisters
Gas Regulator & Hose for
100/400 lb Propane Tanks