FOGATTI FDG-CS120S User manual

300517
CSA/ANSI Z21.10.3:19·CSA4.3:19
Installation and Operation Manual
Outdoor Tankless Water Heater
FDG-CS120S
FDG-CF145S
MODEL:
WARNING If the information in these instructions is not followed exactly, a fire or
explosion may result causing property damage, personal injury or death.
— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instructions.
— Installation and service must be performed by a licensed professional.
• Do not touch any electrical switch; do not use any phone in your building.
• If you cannot reach your gas supplier, call the fire department.
• Do not try to light any appliance.

Please read these instructions carefully and follow all instructions, guidelines, and warnings included in this
product manual in order to ensure that you install, use, and maintain the product properly at all times.
These instructions MUST stay with this product. By using the product, you hereby confirm that you have read
all instructions, guidelines, and warnings carefully and that you understand and agree to abide by the
terms and conditions as set forth herein. You agree to use this product only for the intended purpose and
application and in accordance with the instructions, guidelines, and warnings as set forth in this product
manual as well as in accordance with all applicable laws and regulations. A failure to read and follow the
instructions and warnings set forth herein may result in an injury to yourself and others, damage to your
product, or damage to other property in the vicinity. This product manual, including the instructions,
guidelines, warnings, and related documentation, may be subject to changes and updates. For up-to-date
product information, please visit www.tecasakitchen.com/fogatti.
- Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
ŸImmediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's Installation.
ŸDo not try to light any appliance.
ŸIf you cannot reach your gas supplier, call the fire
department.
- Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
ŸDo not touch any electrical switch; do not use any phone in
your building.
- WHAT TO DO IF YOU SMELL GAS
WARNING
If the information in these instructions is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or death.

CONTENTS
Contents
6.5 Visual Inspection of Flame
4.8 Gas Connection
4.9 Water Connections
4.13 Check the Water Heater
5.4 How to Set the Temperature
4.12 Wired Controller
6 Maintenance
4.7 Water Heater Installation
5.2 Initial Operation
5 Operation
6.4 Pressure Relief Valve
4.11 Electrical Connection
5.3 Normal Operation
5.1 Safe Operation
6.1 Vent System
6.2 Unit Draining and Filter Cleaning
6.3 Clean Burners
4.10 Pressure Relieve Valve Installation and Attentions
4.2 General Guidelines
4.5 Confirm The Appliance Suitability
3.4 Component Diagram
1 Safety Information
2 Performance Feature
4.3 water heater installation check List
1.2 Safety Warnings and Operation Safety Guidelines
4.1 Safety Guidelines
1.1 Safety Definitions
4.4 Prepare for installation
3.1 Function Introduction and Explanation
3.2 Dimensions and Connection Points
4.6 Installation Position
4 Installation
3.3 Model and Specification
3 General Information
7 Maintenance
7.1 General Troubleshooting
7.2 PCB Error Codes
9 Packing List
8 Wiring Diagram
7.3 The following conditions are not a fault
6.6 Freeze Prevention
03
03
05
04
06
06
07
10
08
12
12
12
14
13
15
15
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19
17
20
21
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22
23
24
24
25
27
27
27
28
28
28
29
30
30
31
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35
23

Safety Information
03
ŸNational Electrical Code:
ŸLocal Water, Gas & Electrical Authority Regulations.
Please read this manual carefully before using your
product, and keep it for future reference.
ŸMunicipal Building Codes including local OH&S
requirements.
ANSI Z21.10.3 • CSA4.3.
The installation must be done in accordance with the
information supplied in this manual. All other relevant
national, state and local regulations must also be
adhered to including (but are not limited to):
Installation Notes:
ŸNational Fuel Gas Code:
American Standard ANSI Z223.1/NFPA 54.
Canadian Standard CSA B149.
American Standard ANSI/NFPA 70.
ŸAmerican National Standard/ Canadian Standards
Association Standard for Gas Water Heaters:
Canadian Standard CSA C22.
1 Safety Information
1.1 Safety Definitions
This manual has safety information and instructions
to help you eliminate or reduce the risk of accidents
and injuries.
CAUTION
Indicates a hazardous situation which, if not
avoided, could result in property damage
and minor or moderate injury.
WARNING
Indicates a hazardous situation that, if not
avoided, could result in death or serious
injury.
DANGER
Indicates an imminently hazardous situation
which, if not avoided, will result in death or
serious injury.
NOTICE
This symbol indicates important information
where there is no risk to people or property.
1.2 Safety Warnings and Operation
Safety Guidelines
Maintenance and fault-finding must be done in
accordance with these instructions and the
applicable regulations listed above.
Service Notes:
Gas Water Heater Maintenance:
It is recommended to maintain the gas water heater
for ≥1 times a year. Please contact your local dealer
for maintenance. Do not disassemble the gas water
heater without permission.
WARNING
Service shall be carried out only by authorized
personnel and the appliance shall not be
modified (for example, a licensed plumber or
gas fitter).
Plumbing Notes:
Please follow all the instructions in the Installation
Guide and the following additional instructions for
the water heater outlet connection:
The FDG-CS120S and FDG-CF145S model needs to
be equipped with hot and cold water mixing valve.
1. When connecting the hot water supply to the
fixtures of the property a minimum of two (2)
metres of pipe work must be used between the
outlet of the water heater and the first tap/outlet.
(As shown in the picture below).
3. When the installation is completed the
temperature is to be tested at the taps to confirm
the water temperature does not exceed the
required 122 °F (50 °C) setting.
2. The hot water line should be insulated with
Armaflex or similar pipe insulation.
PLEASE NOTE FDG-CS120S and FDG-CF145S model
is supplied factory pre-set at Nominal 158 °F (70 °C)
maximum outlet water temperature to comply.
4. Water pipe size is nominal 15mm from hot water
outlet to the first tap/ outlet.
5. Gas pipe size is nominal 20mm.
WARNING
This product can expose you to lead, which
is known to the state of California to cause
cancer and birth defects or other
reproductive harm. For more information,
go to www.P65warnings.ca.gov.

Safety Information
04
FDG-CF145S
CONTROLLER 1
(OPTIONAL)
CONTROLLER 2
(OPTIONAL)
CONTROLLER 3
(OPTIONAL)
HOT
WATER
OUTLET COLD
WATER
INLET
GAS
INLET
ENSUITE
LAUNDRY
BATHROOM
KITCHEN
MIN.2 METRES
(FROM HOT OUTLET TO NEAREST HOT WATER TAP/OUTLET)
FDG-CS120S
CONTROLLER 1
(OPTIONAL)
CONTROLLER 2
(OPTIONAL)
CONTROLLER 3
(OPTIONAL)
HOT
WATER
OUTLET COLD
WATER
INLET
GAS
INLET
ENSUITE
LAUNDRY
BATHROOM
KITCHEN
MIN.2 METRES
(FROM HOT OUTLET TO NEAREST HOT WATER TAP/OUTLET)

Performance Feature
05
2 Performance Feature
ŸRain-proof outdoor gas water heater: when the
gas water heater is installed outside, its rain-proof
design helps to stop the rain dropping into the gas
water heater. The gas water heater inhales air
from outside to burn and exhaust the gas waste to
outside, user can operate the gas water heater
through a remote control device, it is safe and
reliable.
ŸLow start up water pressure: low water pressure
to start up and suitable to use widely.
ŸWater-gas valve control: when the city water
supply is cut off or the water outlet valve is shut
down, the gas water heater will stop working and
power off.
ŸOver-pressure protection: when the water
pressure supply is too high, the safety valve in the
gas water heater will release water pressure
automatically to protect the gas water heater from
damage.
ŸThis product is a forced type gas water heater.
When power on the gas water heater, the waste
gas will be forced to exhaust to outside under the
help of draught fan.
ŸDigital constant temperature system:
microcomputer control system is a "computer" of
the gas water heater to control and coordinate the
water, electricity, and gas of the gas water heater
to make sure that the outlet water temperature is
stable and meets shower requirements.
ŸContinuously variable wind resistance feature:
when the chimney or the gas exhaustion is
blocked, the built-in microcomputer system will
detect and enhance the revolving speed of the
fan to eliminate the noxious gas. When the
revolving speed is up to the limited speed, the
microcomputer system will send out an order to
cut off gas and flame so as to protect the gas
water heater.
ŸFlame-out protection: during working, if the gas
water heater is flameout suddenly, it will cut off
the gas automatically to make sure no gas
leakage occurs.
WARNING
The water heater has an automatic drainage
function. When the water inlet pressure of
the water heater exceeds 1.0 Mpa ~ 1.2 MPa,
the water heater will automatically drain.
Please do not place objects around the
water heater to avoid damage caused by
water immersion of the water heater. When
the water heater automatically drains the
water, it indicates that the water system
pressure is too high. After the pressure is
reduced or the water valve is closed,
confirm that the pressure meets the
requirements for using the water heater.
NOTICE
ŸThe appliance will operate at reduced
performance below 340 kPa water
pressure.
ŸFor information relating to overall
dimensions and connection points refer to
diagrams. (Please refer to 3.2 Dimensions
and Connection Points)
ŸFor information relating to burner test
point pressures and injector sizes refer to
the name plate located on the side of the
case for each model. (Please refer to 3.3
Model and Specification)
ŸInstalling in areas over 1500 m above sea
level will reduce performance.

3 General Information
3.1 Function Introduction and
Explanation
ŸThis manual provides information necessary for
the installation, operation, and maintenance of the
water heater.
ŸThe model description is listed on the name plate
which is attached to the side of the case of the
water heater. (Please refer to 4.5 Confirm the
Appliance Suitability)
ŸPlease read all installation instructions completely
before installing this product.
Ÿ The Water Heater is an instantaneous water heater
designed to efficiently supply endless hot water on
demand.
The principle of the water heater is shown
below:
1Over temperature protection thermostat
2Heat exchanger
3Heating device
4Fan
5Water proportional valve
6Water outlet temperature sensor
7Exhaust
8Anti-freezing Thermostat
9Controller
1
2
3
4
5
6
7
8
9
10
11
12
13
16 15 14
lgnition pin assembly
Bumer
Inlet water temperature probe
10
11
12
Proportional valve
Gas Inlet
Cold Water Inlet
Hot Water Outlet
14
15
16
13
FDG-CF145S
General Information
06
FDG-CS120S
1
3
4
5
6
7
8
9
10
11
12
13
1315 14

General Information
07
Operation process of gas water heater:
1. A hot water tap is turned on.
2. Water enters the water heater via the cold water inlet.
3· The water flow sensor detects the water flow.
4. The computer automatically ignites the burner.
5. Water circulates through the heat exchanger and is heated.
7. When the tap is turned off, the unit shuts down.
6. The computer will modulate the gas supply valve and water flow to produce the right amount of hot
water at the correct temperature.
3.2 Dimensions and Connection Points
23.94" (608mm) 22.83" (579mm)
14.61" (371mm)
15.51" (394mm)
7.28" (185mm)
14.57" (370mm)
Gas inlet
Controller
interface
Hot water
outlet
Cold water inlet Water inlet filter
FDG-CF145S FDG-CS120S
23.94" (608mm) 22.83" (579mm)
14.61" (371mm)
15.51" (394mm)
7.28" (185mm)
Gas inlet
Cold water inlet
Hot water outlet
Water inlet filter
Controller interface
14.57" (370mm)

General Information
08
3.3 Model and Specification
Gas category
Nominal Gas Consumption (Btu/hr)
Nominal Test Point Pressure
Nominal minimum gas consumption (Btu/hr)
Water Pressure Maximum
Water Pressure Minimum
Number of Injectors
Burner Control Segment
Injector Diameter
Electrical rating
Water heating capacity
Net Weight
Overheating Cut-off
Ignition
Dimensions (Cosing. H × W × D)
Model
Nominal Manifold Pressure
We reserve the right to amend the product without prior notice.
Electricity supply
Water connection
Gas inlet connection
FDG-CF145S
NATURAL GAS
145,000
6.99" W.C. (1.74 kPa)
17,000
150 psi (1.0 MPa)
15 psi (0.1 MPa)
16 Pcs
4 Pcs
64.2 mil
44 W
5.28 GPM
35.6 lbs (16.15 kg)
176 °F (80 °C)
Direct without pilot
23.94" × 15.51" × 7.28" (608 mm × 394 mm × 185mm)
3.05" W.C. (0.76 kPa)
120 VAC 60 Hz
NPT 3/4
NPT 3/4
PROPANE
11" W.C. (2.74 kPa)
43.4 mil
5.3" W.C. (1.31 kPa)
Part No. FDG-CF145SW-NG FDG-CF145SW-LP

General Information
09
Nominal Gas Consumption (Btu/hr)
Nominal Test Point Pressure
Nominal minimum gas consumption (Btu/hr)
Water Pressure Maximum
Water Pressure Minimum
Number of Injectors
Burner Control Segment
Injector Diameter
Electrical rating
Water heating capacity
Net Weight
Overheating Cut-off
Ignition
Dimensions (Cosing. H × W × D)
Model
Nominal Manifold Pressure
We reserve the right to amend the product without prior notice.
Electricity supply
Water connection
Gas inlet connection
FDG-CS120S
FDG420OD-CS120S-NG
120,000
6.99" W.C. (1.74 kPa)
16,500
150 psi (1.0 MPa)
15 psi (0.1 MPa)
15 Pcs
15 Pcs
57.1 mil
42 W
4.23 GPM
29.32 lbs (13.3 kg)
176 °F (80 °C)
Direct without pilot
23.94" × 15.51" × 7.28" (608 mm × 394 mm × 185mm)
3.65" W.C. (0.91 kPa)
120 VAC 60 Hz
NPT 3/4
NPT 3/4
FDG420OD-CS120S-LP
11" W.C. (2.74 kPa)
43.4 mil
4.58" W.C. (1.14 kPa)
Gas category NATURAL GAS PROPANE
Part No.

General Information
10
FDG-CF145S:
Front panel
Sealing cotton
Pressure relief valve(For Canada)
Heat exchanger
Water outlet connector
Water outlet temperature sensor
Water inlet connector
Water proportional valve
Fan
Manifold
Proportional valve
3.4 Component Diagram
1
2
3
4
5
6
7
8
9
10
11
Intake connector
Power line
Back panel
Controller
Exhaust
Ignition pin assembly
Burner
Over temperature protection thermostat
Anti-freezing Thermostat
Heating device
12
14
15
13
16
17
19
20
18
21
1 2 3 4 5 6 7 8 9 10 11 12 14
15
13
16
1719
20 18 21

General Information
11
FDG-CS120S:
Front panel
Manifold
Water outlet temperature sensor
Fan
Pressure relief valves(For Canada)
Water outlet
Proportional valve
Intake connector
Water proportional valve
Water inlet connector
1
2
3
4
5
6
7
8
9
10
11 Power line
Back panel
Controller
Anti-freezing Thermostat
Heat exchanger
Exhaust
Sealing cotton
Heating device
Over temperature protection therm
12
14
15
13
16
17
19
18
1 2 3 4 5 6 7 8 9 10 11 12
14
15 13 16
1719 18

Installation
12
4 Installation
4.1 Safety Guidelines
The water heater requires careful and correct
installation to ensure safety and efficient operation.
This manual must be followed. Please read the
"Safety Guidelines" and the "Safety Warnings and
Operation Safety Guidelines" sections at the
beginning of this manual.
Ensure the following warnings and instructions are
read and understood before commencing
installation.
WARNING
ŸThe licensed professional is responsible for
the correct installation of the water heater
and for compliance with all relevant
national, state and local regulations.
ŸThe installation must conform with local
codes or, in the absence of local codes, the
National Fuel Gas Code, ANSI Z223.1/NFPA
54, and/or CSA B149.1, Natural Gas and
Propane Installation Code.
ŸInstallation and service must be performed
by a licensed professional (for example, a
licensed plumber or gas fitter).
ŸNot to be used as a pool heater.
ŸThe water heater must be installed outdoors
only. Do not install water heater indoors.
ŸThe appliance, when installed, must be
electrically grounded in accordance with
local codes or, in the absence of local
codes, with the National Electrical Code,
ANSI/NFPA 70, and/or the CSA C22.1,
Canadian Electrical Code, Part I.
4.2 General Guidelines
The water heater is intended to be installed. Please
ensure that:
ŸWhether all transport protection/packaging has
been removed.
ŸLocation of water leaks that will not damage the
surrounding area.
ŸThe water heater has enough natural ventilation
space.
ŸCheck the nameplate and Gas type label to
determine the correct gas type, gas pressure ,
water pressure and electrical characteristics; If the
equipment does not meet the operating conditions,
do not install it or consult your supplier.
WARNING
ŸIf the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent or similarly qualified persons in
order to avoid a hazard.
ŸThis appliance is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities, or
lack of experience and knowledge, unless
they have been given supervision or
instruction concerning use of the appliance
by a person responsible for their safety.
ŸWater temperatures above122 °F (50 °C)
can cause severe burns or death from
scalding.
ŸChildren should be supervised to ensure
that they do not play with the appliance.
ŸChildren, the disabled and the elderly are
at a high risk of being injured. Feel the
water temperature before bathing or
showering. Do not leave children , disabled
persons, or the elderly unsupervised.
ŸImmediately call a licensed professional
to inspect and/or service the unit if
necessary.
ŸDo not store or use gasoline or other
flammables, vapors, or liquids in the
vicinity of this appliance. Vapors from
flammable liquids will explode and catch
fire causing death or severe burns.
ŸDo not reverse the water and/or gas
connections as this will damage the gas
valves and can cause severe injury or
death. Follow the diagram when installing
your water heater (Please refer to 3.1
Function Introduction and Explanation).
ŸDo not use this appliance if any part has
been in contact with or been immersed in
water.
ŸDo not disconnect the electrical supply if
the ambient temperature will drop below
freezing.
ŸThe Freeze Prevention System only works
if the unit has electrical power. The
warranty will not be covered if the heat
exchanger is damaged due to freezing
(Please refer to 6.6 Freeze Prevention).
DANGER
ŸIf you have any questions, please close the
gasoline valve and all hot water valves and call the
professional.

Installation
13
4.3 water heater installation check
List
oEnsure no water leakages.
oEnsure you are using the right exhaust vent
products, and follow the installation manual
from the suppliers.
oTurn off cold and hot water switches before
cleaning up water inlet filter. Put a bucket
under the water heater's filter to catch any
water out of the water heater. Screw out the
water inlet filter, wash off debris and dusts,
and then hand screw the filter back in. When
it's done, turn on the cold and hot water
switches.
oUnbox and check whether the water heater,
installation manual and owner's guide, parts
and accessories bag, wired digital controller
(outdoor gas water heater models only) are
coming in the box.
oCheck to ensure there are no corrosive
chemicals in the air intake.
oConfirm you are using the gas type as required
by the water heater.
oEnsure the pressure relieve valve's relieving
capacity exceeds that of the water heater BTU
input rating. Please refer to the specifications
on the side of machine for BTU input ratings.
Install a manual gas shut-off valve between the
water heater and your gas supply line.
oCheck to confirm there is no gas leakage in
piping and fittings.
oWater supply should be free of chemicals, and
water hardness that higher than allowed level
may damage the water heater.
oEnsure there is enough distance required
between the exhaust vent and air inlet of
houses.
oEnsure there is enough space required for
installation.
oConfirm the gas inlet pressure in the min-max
range as required.
oTurn off hot water switch, turn on cold water
switch and the drain screw, flush the debris
and air out of the water pipes. Debris inside the
water my damage the water heater. Please use
buckets or extra water pipes if needed.
oConfirm the power supply is 120 V/60 Hz, and
properly grounded.
oConfirm the thermostat works normally.
oConnect a gas manometer to the pressure port
to verify the system is working normally. Turn
on appliances that use high flow rate hot water
and set the water heater to its maximum
operation capacity, the inlet gas pressure must
be higher than the minimum pressure on the
specification label.
oDrain the water out of the water heater if you
are not using the water heater for a significant
time period.
oFor outdoor Tankless Water Heater models,
confirm the wired digital controller is installed
correctly.
oDo not induct poisonous chemicals into
drinking water, like the chemicals used to
process broiler water.

Installation
14
4.4 Prepare for installation
Parts included
Assembly KitTankless
Water Heater
User Manual Wired Controller
Tools and Materials needed (Not included)
Hammer Drill
with Concrete Bits
Screw Driver Pipe Wrench Wrench
Soapy Water
Gloves
Gas Leak Detector
Safety Glasses
RulerLevelling
instrument
Approved Venting Pressure Relief Valve
Teflon Tape
Materials that may be needed (Not included)
NPT3/4-in x 1/2-in dia
Threaded Male Adapter
Single gang
electrical box
Threaded Tee Fitting
(Middle 3/4")
1/2"Hex Nipple Hot Water
Isolation Valve
Pipe Wrap InsulationElectrical
Adhesive Tape
Cold Water
Isolation Valve
Thermostatic
Mixing Valve

Installation
15
4.5 Confirm the Appliance Suitability
Check the gas type label and the name plate for
the correct gas type, gas pressure, water pressure
and electrical rating for your application. Do not
install the unit if these requirements are not met.
Gas Type Label
Position on Unit *
Rating Label
Position on Unit *
WARNING
ŸThe connection, attachment , integration
or general association of other equipment
or parts not specified by the water heater
which either directly or indirectly affect the
operation or performance of this
equipment could void the warranty.
ŸIt should be as close as practical to the hot
water outlet s to minimise heat loss and
cost.
ŸThe manifold pressure is preset at the
factory. It is computer controlled and
should not need adjustment.
ŸWater hardness may affect the water
heater performance. It is important that
the water heater is in stalled in water
conditions that are suitable for long term
operation.
ŸThe water heater does not require a
ŸThis equipment is not suitable for pool or
spa heating.
ŸThis is a water heating apparatus only and
the delivered water quality is dependent
upon the quality of water supplied to this
system.
fireproof back plate if installed on a timber
wall.
ŸSpecial conditions which shall be avoid,
e.g. marine environment, high humidity
conditions (more than 95% RH), necessary
to ensure optimum performance.
4.6 Installation Position
The following precautions should be considered.
Carefully read this section before installation, and
selecting the location for installing the water heater.
WARNING
ŸThis is a water heating apparatus only and
the delivered water quality is dependent
upon the quality of water supplied to this
system.
ŸAs with any water heating appliance, the
potential for leakage at some time in the
life of the product does exist.
ŸAlthough the water heater is designed to
operate with minimal noise level, you
should not install the unit on a wall
adjacent to a bedroom, or a room that is
intended for quiet study or meditation, etc.
ŸLocate your heater close to a drain where
leakage will not do damage to
surrounding areas .
WARNING
ŸEvery care is taken to warn occupants of
the building and the public of any injury
that may occur from falling tools, open
trenches, water connections or any other
general hazard.
ŸMake sure the water heater will have
sufficient room to expel combustion air
and operate with natural ventilation.
ŸKeep the area around the water heater
clean. Particles may clog the air vent,
reduce fan function, or cause improper
combustion.
ŸLocate the unit for easy access and
maintain clearance for service and
maintenance. Install the unit so that it can
be connected or removed easily.
* Not limited to the left and right sides of the machine.

Installation
16
ŸSecurely fasten the unit to the wall with
screws or bolts in the top and bottom
brackets.
ŸIt must be located in accordance with the
requirements clearances from eaves,
windows, vents etc. And see the diagram
on the . For more "4.6 Installation Position"
surrounding construction material
requirement.
ŸPlease check the proximity of gas &
electrical connections so as not to create a
hazard and avoid access problems for
other services.
ŸMost load bearing walls such as brick,
brick/veneer, weatherboard and stud-
frames are suitable locations.
ŸThis relates to the physical separation
distance specification where multiple
appliances are employed. That equates to
a minimum 150 mm horizontal flue
separation distance allowing appliances
to be placed side by side in the same
vertical plane
ŸDo not locate your water heater in a pit or
any location where gas and water can
accumulate.
ŸThe water heater must be installed
outdoors only. Do not install the water
heater indoors.
ŸNot to be used as a swimming pool
heater.
ŸDo not place flammable or explosive
materials within one meter of the water
heater to avoid fires.
4.6.1 Clearances for Outdoor Heater
Locations
ŸA vent shall not terminate directly above a
sidewalk or paved driveway that is located
between two single family dwellings and serves
both dwellings.
ŸClearance in accordance with local installation
codes and the requirements of the gas supplier.
ŸPermitted only if veranda, porch, deck, or balcony
is fully open on a minimum of two sides beneath
the floor.
ŸThis water heater is strictly forbidden to be
installed indoors and in the bathroom.
ŸThe water heater shall not be installed under the
exhaust fan of the exhaust fan or the range
hood.
ŸThere shall be no other gas appliances near the
installation of the water heater, and there shall
be no flammable gases, liquids, etc. around it.

Installation
17
ŸInstallation of outdoor water heaters should
avoid the impact of other people's lives due to
exhaust and noise.
ŸThe water heater must be installed in a well
ventilated area (eg open balcony, patio)
ŸThe distance between the water heater and the
surrounding wall, unit: inch (mm)
＞12'' (304 mm) ＞12''(304 mm)
＞16'' (405 mm)
0''(0mm)
Active
door
or vent
Exhaust vent
Active
door
or vent
Exhaust vent
＞47.25''(1200) ＞47.25''(1200)
＞47.25''(1200)
＞35.83''(910)
4.7 Water Heater Installation
2. Hang up the water heater, screw on the M6nut,
and fix the water heater to the wall.
3. The installation of the water heater must be
correct, otherwise it will affect the normal use of
the water heater.
1. According to the requirements of the figure and
the size of the water heater, mark the wall with a
dash mark, then drill three holes with a diameter
of 8mm and a depth of 60mm, respectively Φ
insert three M6 50 mm expansion screws into the ×
hole and tight the expansion screws with a
wrench.
4.8 Gas Connection
Power cord
Gas inlet
Gas valve (tap)
FDG-CF145S

Installation
18
Power cord
FDG-CS120S
Gas inlet
Gas valve (tap)
WARNING
ŸConfirm the position of the gas inlet. Do
not connect water line to gas inlet.
ŸTurn off the electric power to the water
heat er and manual gas valve located on
the outside of the unit before beginning
gas connection.
4.8.1 Sizing and Connection Suitability
ŸInstall a manual gas shut-off valve between the
ŸGas pressure below this specified range for the
water heater and/or insufficient gas volume will
adversely affect performance.
ŸCheck the gas type label to make sure that the
unit was built for the type of gas you will be using,
and that the gas inlet pressure is within the
appropriate range. (Please refer to 4.5 Confirm the
Appliance Suitability)
ŸThe appliance and its individual shutoff valve
must be disconnected from the gas supply piping
system during any pressure testing of that system
at test pressures in excess of 1/2 psi (3.5 kPa).
ŸInlet gas pressure must not exceed the maximum
values gas pressure above the specified range ,
will cause dangerous operating conditions and
damage to the unit.
ŸUntil testing of the main gas line supply pressure
is completed, ensure the gas line to the water
heater is disconnected to avoid any damage to
the water heater.
ŸAlways use approved connectors to connect the
unit to the gas line. Always purge the gas line of
any debris before connecting to the water heater.
water heater and the gas supply line.
ŸWhen the gas connections are completed, perform
a gas leak test either by applying soapy water to
all gas fittings and observing for bubbles or by
using a gas leak detection device.
ŸThe regulator is preset at the factory. It is
computer controlled and is not to be adjusted by
any person other than a licensed professional.
WARNING
Conversion of this unit from natural gas to
propane (LPG) or propane (LPG) to natural
gas cannot be done in the field. Contact
your supplier to get th e correct unit for your
gas type.
4.8.2 Measuring Inlet Gas Pressure
and Testing Gas Leakage
FDG-CF145S
FDG-CS120S
2. Open a tap/outlet . The unit should turn on and
the gas in the gas pipeline should be purged.
4. Remove the screw on the pressure port located
on the gas inlet of the water heater shown in the
diagram to the above.
5. Connect the manometer to the pressure port.
1. Shut off the manual gas valve on the supply gas
line.
3. Leave the tap/outlet running until the unit shuts
down due to lack of gas supply. Then turn off the
tap/outlet.