Modena Rapido Series Owner's manual

User
Manual Book
Gas Instant Water Heater
Rapido Series
GI 1020 B, GI 0620 B

2
TABLE OF CONTENT
Part 1: Important Safety Information 3
Part 2: Name of Parts 4
Characteristic and Usage 4
Part 3: Installation 6
Installation Requirement 6
Installation Mode 9
Part 4: How to Use 13
Preparation Before Ignition 13
Ignition/Operation 14
Discontinuing the Use 15
Replacing Batteries 15
Part 5: Preventive Action 16
Prevention of Gas Accident 16
Prevention of Fire 17
Prevention of Carbon Monoxide Poisoning 18
Other Cautions 19
Treatment of Abnormalities 20
Maintenance 20
Repair Service 22
Packing List 22
Part 6: Troubleshooting 23
Part 7: Specification 25
Appendix: Wiring Diagram 26
This manual book explains everything you need to know about your
new product. Please contact our Customer Care should you need
further assistance through www.modena.com.

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When the water heater is operated, gas combustion will consume a
large amount of oxygen and exhaust much carbon monoxide. To avoid
the great harm for human health or even death caused by excessive
carbon monoxide inhalation, MODENA sincerely advise all users to:
Read this manual book carefully before installing and operating the
water heater for the first time.
Do not install the water heater in the bathroom.
Fit out a good quality of gas pressure reducer and the special gas
hose
Installing and using the water heater must be in accordance with
the requirements stipulated in these usage instructions.
Install a smoke exhaust duct to vent exhaust gas out of the room.
Make sure that the room where the water heater is installed has
enough fresh air and well-ventilated.
Once the outer wrapping and the inner wrappings of the various
parts have been removed, check and make sure that the appliance
is in perfect condition. If you have any doubts regarding to the
quality and the completion of the appliance accessories, do not use
this appliance yet and contact MODENA Customer Care.
This water heater must be installed by qualified technician.
In the case of a failure and/or malfunction, all repairs or settings
must be done with maximum care and attention by qualified
technicians. For this reason, we recommend you to contact
MODENA Customer Care; explaining the trouble in details; and
mention the name of the model.
The packaging materials used (such as cardboard, bags,
polystyrene foam, nails, etc.) must not be left anywhere in easy
reach for children because the packaging materials could
potentially cause a hazard. To safeguard the environment, all
packaging materials are environment-friendly and recyclable.
If there any questions about the operation procedure & the safety
instruction of this water heater, contact MODENA Customer Care.
PART 1: IMPORTANT SAFETY INFORMATION

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Characteristics and Usage
This gas instant water heater can supply hot water quickly and
continuously, so it is suitable to provide hot water for bathing, washing
and other cleaning.
This type of water heater equipped with the following features:
1. Digital Display for displaying the hot water temperature.
NOTE
All pictures displayed in this manual are based on the standard
appearance of the gas instant water heater and only for
illustration. The actual appearance of this appliance is based on
purchased model.
PART 2: NAME OF PARTS
Remark:
1. Flame Observation Window
2. Water Volume Controller Knob
3. Battery Box
4. Cold Water Inlet
5. Hot Water Outlet
6. Gas Inlet
7. Flame Controller Knob
8. Water Temperature Display

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2. Water Control Automatic Ignition: by simply open the water valve
and the igniter, this feature will ignite automatically and the hot
water will immediately be available.
3. Water Temperature Controller: adjust the water temperature as
needed.
4. Flue-type Exhaust Device: vent the exhaust gas out to keep the
indoor air fresh.
5. Water Temperature Display: provided with low battery indicator
function.
6. “Low Water Pressure” Start-Up: this water heater can be turned on
with low water pressure. This feature equipped with a wide range
of application.
7. Steady Water Volume: effectively avoid the impact of the water
pressure fluctuation on the water volume and the outlet water
temperature, as well as prevent the over-hot water output due to
high water pressure.
8. Flame-Out Safety: the water heater will automatically cut off the
gas if the flame accidentally flows out during the use period.
9. Water-Gas Linkage Controller: the water heater will automatically
stop the combustion and shut down if the water supply line is
blocked or the inlet valve is closed.
10. Over Pressure Protection: when the pressure of the water supply is
too high, the safety valve can automatically relieve the pressure to
avoid any damage to the water heater.
11. Thermal Protection: the water heater will automatically cut off the
gas and stop working when the temperature of the water output
exceeds 90 °C or dry-heating occurs.
12. Auto Cut-Off: the water heater will automatically cut off the gas
and power after 20 minutes of continuous operation. It can
continue to work after re-start.

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Installation Requirement
1. Do not install this gas instant water heater in the bathroom.
2. Do not install the water heater in a place where the strong wind
occurs, otherwise the flame of the water heater will be blown out
or the combustion will be incomplete.
3. Do not install the water heater outside the room (without roof).
4. Do not install the water heater in the confined room. Install the
water heater in well-ventilated room with a volume more than 7.5
m3. There should be an air inlet with a cross section more than 0.06
m2 connected to the outdoor. The smoke exhaust pipe must also be
installed.
5. Install the water heater in a place where the line of human sight
and the flame observation window are in the same height that is
1.55 m - 1.65 m above the ground. The water heater also must be
far away from flammable materials.
PART 3: INSTALLATION

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6. Do not place any opened power cord, electric appliances, or gas
pipeline above the installation site of the water heater. Keep a
horizontal distance more than 40 cm between the water heater and
other electric appliances. Do not install any gas appliance such as
gas oven and gas stove underneath this water heater.
7. Keep the distance more than 150 mm between the water heater, its
surrounding walls and the ceiling. Build the installation site/location
with non-combustible materials. Otherwise, insulate it with heat
insulating panel. The distance between the insulating panel and the
surrounding wall should be more than 10 mm.
Air Inlet
0.2 m
1.55 –1.65 m
0.3 m
>150 mm
>150 mm
>150 mm

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8. Install an inlet valve to the water inlet pipe of the water heater.
9. Place the end of the smoke exhaust pipe outside the room.
10. For the liquefied petroleum gas (LPG) users, use the qualified gas
pressure regulating valves and hoses to ensure the water heater
could operates properly and be used safely. For pipeline gas users,
ask the gas company or the relevant management authority to
connect the gas pipe.
11. After the water heater is installed with a smoke exhaust pipe,
during the use, do not turn on any mechanical ventilation
equipment such as the smoke exhaust ventilator and the exhaust
fan in the room where the water heater is installed or to which the
water heater is connected.
Smoke Exhaust
Pipe
Water Heater
Water Outlet Pipe
Water Inlet Pipe
Air Inlet
Gas Inlet Pipe
(<2 m)
Inlet
Valve
Water Source
Outlet
Valve
Outlet
Valve
Shower

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Installation Mode
a. Keep the water heater vertical and not tilt during the installation. As
shown in the below picture, drill the holes vertically on the wall for
the installation. Insert the expansion screws into the installation
holes on the top; and insert plastic plugs into the installation hole at
the bottom. After installing (mounting) the water heater, install
gaskets and nuts onto the expansion screws and screw up the
nuts. Screw on the tapping screw at the bottom. User can choose
A or B installation mode according to the situation.
NOTE
The connectors of the water heater in the picture shown above
would be in different order for different water heater model. Look
up to the real object for reference during installation process.
.
WARNING!
It is strongly forbidden to use this water heater with no smoke
exhaust pipe installed.
.
Expansion Screw
Tapping Screw
Tapping Screw
Tapping Screw
Plastic Plug
Plastic Plug
Plastic Plug

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b. For the installation of smoke exhaust pipe, please pay attention the
following matters :
The water heater must be installed with smoke exhaust pipe
during the use. The pipe dimension refers to the ‘Specification’
section in this manual book. The smoke exhaust pipe should be
installed according to the requirements in this manual book.
Determine the length of the corrugated pipe as needed, but the
total height of the pipe should be more than 2 m, and the
horizontal length is no more than 3 m. The vertice quantity
should be no more than 2, and the angle is no less than 90° to
reduce the smoke exhaust resistance.
Fasten the corrugated pipe and the smoke vent of the water
heater with clamps to prevent exhaust gas being vented inside
the room.
Tilt the smoke exhaust pipe 3° outward and downward to
facilitate the outflow of condensate water.
Cover the smoke exhaust pipe with heat-insulating and fire-
proof materials which its thickness must be more than 20 mm.
Cover the pipe that is installed around the flammable wall.
Do not hide the smoke exhaust pipe inside the ceiling.
Otherwise, wrap up the pipe with heat-insulating material that
has more than 20 mm thickness. Make a distance more than
150 mm between the smoke exhaust pipe and flammable
materials (such as ceiling and furniture).
For maintenance, do not use cement to fill the gap between
smoke exhaust pipe and the access hole of the pipe on the
wall.
Installation Mode A
Installation Mode B
3°
3°

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c. Installation of the smoke exhaust pipe:
1. Make a hole on the wall near the water heater; the hole should
has diameter that is slightly more than the smoke exhaust pipe
outer diameter; extend the smoke exhaust pipe outside the
room and make the outdoor part slightly tilted downward.
2. Place the air vent at higher position than the water heater.
3. Place the air inlet at lower position to prevent the outdoor air
from directly entering the combustion chamber.
4. Install a windproof cover firmly.
Windproof Cover
>2 m
Smoke Exhaust
Pipe
No more than 2
Horizontal length
no more than 3 m
Angle no Less
than 90°
Water
Heater
Windproof Cover
>600 mm
>150 mm
Air Vent
Hole for Condensate
Water
Hole on Brick Wall
Heat-insulating Panel
Air Inlet
>150 m
>250 m
Flame Observation Window
Adult’s height of sight
(from the ground)

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d. Gas Pipe Installation :
1. Select the qualified rubber hose or rigid pipe and gas pressure
relief valve.
2. Select the dimension of the pipe refer to the ‘ Specification’
section in this manual book.
3. The length of rubber hose cannot be more than 2 m if using
liquefied petroleum gas.
4. Install a rubber ring seal between the gas inlet of the water
heater and the hose connector. The rubber hose must be
connected to the red line of hose connector and must be
fastened with a clamp.
5. After finishing the installation, use soapy water to check
whether there is gas leak or not.
NOTE
Apply a rubber seal ring when using the metal hose.
The connectors of the water heater in the picture shown
above would be in different order for different water heater
model. Look up to the real object for reference during
installation process.
.
Rubber
Hose
Water Heater
Rubber
Seal
Hose
Connector
Clamp
Red Line
Gas Inlet
Cold Water
Inlet
Rubber Seal
Gas Supply
(Inlet) Pipe
Hot Water
Outlet Pipe
Cold Water
Inlet Pipe
Remark :
Gas Inlet--- Gas Supply Pipe
Hot Water Outlet--- Hot Water Outlet Pipe
Cold Water Inlet --- Cold Water Inlet Pipe
Hot Water
Outlet

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Preparation before Ignition
1. Before using the water heater for the first time, open the battery
box and insert two pieces of D size batteries according to the
correct polarity (installation of negative and positive battery poles).
2. Turn the water inlet valve to the maximum position; then open
(switch on) the hot water outlet valve to check whether the water
can flow out or not.
3. Then, close (switch off) the hot water outlet valve and fully open
the main gas valve.
PART 4: HOW TO USE
Open the water inlet valve; open the hot
water outlet valve to check whether
there is water flowing out.
Switch off the hot water outlet valve
and switch on the gas valve.
Install batteries
in a correct way.

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Ignition/Operation
1. Ignition. After finishing the preparation, open the hot water outlet
valve; the water heater will make “pop” sound; then the hot water
will immediately flow out. If the water heater cannot be turned on
at once, close the hot water outlet valve; and restart the water
heater after 15 –20 seconds.
2. Outlet Water Temperature Controller. Rotate the flame controller
knob to “Max” position or rotate the water volume controller knob
to “High” position, the outlet water temperature will increase. On
the contrary, rotate the flame controller knob to “Min” position or
rotate the water volume controller knob to “Low” position, and then
the outlet water temperature will decrease. If the temperature of
the supply water is 25 oC, then the maximum temperature of hot
water that could be reached is 70 oC.
When the gas controller knob is at “LOW”
position, the water controller knob is at
“HIGH” position, the output water
temperature reach the lowest scale.
Automatic
Ignition
When the gas controller knob is at
“HIGH” position, the water
controller knob is at “LOW” position,
the output water temperature
reach the highest scale.
Open the hot water outlet valve, and the
water heater will ignite automatically

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Discontinuing the Use
1. Turn off the hot water outlet valve, and the water heater will
automatically shut down.
2. Turn off the water inlet valve.
3. Turn off the gas inlet valve.
Replacing Batteries
1. If the time interval of “pop” sound during the ignition is quite a bit
long or flame extinguish as soon as it is ignited, replace the
batteries immediately with the new ones.
2. Use sealed damp-proof iron clad batteries. Normally, batteries
replacement should be done every half year.
WARNING!
If the water heater is used again after a while, do not wash your
body with the water which comes out first. It is due to the hot
water temperature inside the water heater will be very high. In
order to avoid scalding, let the hot water flows out for a few
seconds before applying it to human skin.
Turn off the hot
water outlet valve
Turn off the water
inlet valve
Turn off the main
Valve of gas inlet

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Prevention of Gas Accident
1. Determine the type of gas. Make sure that the gas type you use is
similar with the specified type of gas in the rating label of the water
heater. Do not disassemble the water heater without authorization
and use different type of gas by force.
2. Check whether the flame on the burner is extinguished after the
water heater is being used; and remember to turn off the main gas
valve.
3. Check frequently whether there is a gas leak at the connector or
gas line pipe. Normally, change the rubber hose once a year.
4. For liquefied petroleum gas (LPG) users, if the flame is detected
floating, the pressure relief valve that connected to the vent of gas
tank may fail to work properly. Stop using the current pressure
relief valve and replace it with a good one.
PART 5: PREVENTIVE ACTION
WARNING!
MODENA will not be liable for any accidents caused by unauthorized
dismantling of this water heater or failure to comply the installation
and operation instructions outlined in this manual book.
Frequently check the connector
or gas line pipe to avoid gas leak.
Check whether the flame on the
burner is extinguished, and turn
off the main gas valve.

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5. If gas leak is detected, do not ignite the water heater or turn on any
electrical appliances; open all the doors and windows to
automatically exhaust the gas out of the room; turn off the water
heater and contact MODENA Customer Care or the gas company.
6. It is forbidden to operate the troubled water heater. Contact
MODENA Customer Care once any trouble occurs.
7. This water heater is only used for hot water supply and shower. Do
not use it for any another purposes.
Fire Prevention
1. Do not go out or go to bed while the water heater is on.
2. Do not place any flammable material near the draft hood. Do not
use towel, clothes, and other things to cover the vent.

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Prevention of Carbon Monoxide Poisoning
1. A large amount of oxygen is needed when the water heater is
operated. Therefore, the room where the water heater is installed
must have enough air supply and must be well-ventilated. It must
also have fixed opened air inlet. The closed doors and windows
cannot be classified as the effective air inlet.
2. A large amount of exhaust gas will be generated during the water
heater operation. Therefore, the water heater must be installed
with a smoke exhaust pipe to vent the exhaust gas from the
combustion process out of the room.
3. If the gas supply pressure is too low, there may be result on
tempering that affects the normal operation of the water heater. At
this point, the flame will turn from blue to yellow and the exhaust
carbon monoxide will increase significantly. Stop using the water
heater shortly.
A smoke exhaust pipe must
be installed.
There must be a fixed open
air inlet.
Turn off the water inlet valve and
rotate the water temperature
regulation knob to “Low” position.
Air Intake

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Other Cautions
1. Non-potable. Since there is long-time stored water, the hot water
generated by this water heater is not potable.
2. During the ignition process, it is strongly forbidden to observe the
ignition with eyes near to the observation window. The distance
between the eyes and the observation window should be at least
300 mm.
3. If the water heater will not be used for a long time, take the
batteries out from its box. It is to prevent the battery box from
corrosion due to the damage of the batteries that later on can
badly affect the use of the water heater.

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Treatment of Abnormalities
If the abnormalities are detected such as gas leak, abnormal
combustion (e.g. tempering, flame lifting, yellow smoke or black smoke
emission), peculiar smell and abnormal sound, or other emergency
situations, immediately shut the gas valve off and contact MODENA
Customer Care or the gas provider company to achieve the solution
(recommended actions).
Maintenance
1. Frequently check whether the gas inlet pipe (rubber hose) is in
good condition and there are no troubles caused by aging and
defectiveness of the water heater. Regularly change the rubber
hose and frequently use the soapy water to identify whether there
is a gas leak by checking the bubble appearance at the pipeline
connectors.