KOIZUMI MODEL: Comfort with Innovation FDG-C580 FDG-C5100 iE Thankless Hot Gas Water Heater Installation and Operation Manual &® @ E: oer SCANSION oH ARMING 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 «Do not try to light any appliance.
Installation Manual and Owner's Guide 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 + Do not try to light any appliance. + Do not touch any electrical switch; do not use any phone in your building.
CONTENTS Installation Manual Combustion Air Supply. .2 Gas And Gas Pipe Specifications Gas Connection. Water Connection. Pressure Reducing Valve Maintenance... Electrical Connection: [Lila TR ETS TO —— Owner's Guide Operational Safety... Operational Instructions. Built-in Controller. Gas pressure test Component Diagram. Wiring Diagram.
Installation Manual CONGRATULATIONS Congratulations and thank you for choosing our thankless water heater. Before use, we recommend that you read through this installation manual carefully. Keep this manual for future reference. if you need an additional manual, contact the manufacturer or your local distributor. When you call, please tell us the product name and the serial number of your unit written on the rating plate of the water heater.
Specification MODEL FDG-CS80 FDG-CS100 Natural Gas Input Btu/hr Min: 11,000 Min: 11,000 (Operating Range) Max: 80,000 Max: 100,000 Propane Input Btu/hr Min: 11,000 Min: 11,000 (Operating Range) Max: 80,000 Max: 100,000 Activation flow rate | GPM / min| 20 Rated power WIA 25WI0.32A 17TW0.22A Standby W/A 110.03 Freeze-Protection | W/A 100 /0.85 Supply VAC/Hz 120/60 Gas Connection Water Connections 3/4" NPT Water Pressure” [psi (MPa) 15-150 natural gas Jot Min. 3.5 (0.87) Max 10.5 (2.
*15 psi or above is recommended for flow. **Water heater Category — water heaters of other than direct vent type, for outdoor installation, are divided into four categories based on static pressure produced in the vent and flue loss. Category | a water heater that operates with a non-positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent.
Introduction » This manual provides the information you need to install, operate, and maintain your water heater. « The model description is listed on the nameplate, which is located on the side panel of the water heater. * Read all installation instructions thoroughly before installing this product. « If you have any questions or sconce about this device, please consult the manufacturer or its local agent.
1. A hot water tap is turned on. 2. Water enters the heater. 3. The water flow sensor detects the water flow. 4. The computer initiates the fan motor and sends a signal to the ignite to create an ignition spark. 5. The gas ignites and flames appear within the boomer chamber. 6. Water circulates through the heat exchange and then gets hot. 7. Using isotherms to measure temperatures throughout the water heater, the computer modulates the gas and water valves to ensure proper output water temperature. 8.
Safety Guide Safety Definition Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. /N\ indicates an imminently hazardous situation which; if not avoided, could: result in death or serious injury. Indicates an imminently hazardous situation which, if not avoided, could result in minor or moderate injury. No rice |: Indicates information considered important but not hazard related. General 1.
Installation Instructions General 1. Follow all local regulations, or in the absence of local regulations, follow the current version of the US National Gas Code: US ANSI z 223.1 / pan 54 or Canada b 149.1 natural gas, propane installation specifications. 2. All gas water heaters require proper and careful installation to ensure safe and efficient operation. This manual must be strictly observed. Read the "Safety Guide" section. 3. The manifold pressure is preset at the factory.
WARNING + Water temperatures above 125 °F (52 °C) can cause severe bums ar buns. The factory water temperature is set at 107 minimize the risk of bums: Always check the water temperature before: taking a shower or shower. = Do: not store or use gasoline or other flammable materials; vapors or. liquids near this equipment. » Do not connect fo water or gas connections as this can damage the. valve and can cause serious injury or death. «Do not use this product if it is immersed in water.
WARNING + ‘Installation and repair must be performed by a qualified installer (for ‘example, a licensed plumber or gas fitter) or the warranty will be void: ~The installer (authorized professional) is responsible for properly installing: the water heater and complying with all national; ‘state/provincial and local regulations: «The manufacturer does not recommend installing the water heater in a pit or location where gas and water may accumulate.
NOTICE +The warranty does not cover damage caused by water quality. = This water heater can only use drinking water.Do not introduce pool or hot spring water or any chemically treated water into the water heater, + For all other types of applications; the water hardness level for single family applications should not:exceed 7 grains: per gallon: (120 ppm) or. 4 grains (70 ppm) per gallon. The hardness of the water can cause scaling and can affect/damage the water heater.
Water heater installation check list: 0 unbox and check whether the water heater, Installation manual and owner's guide, parts and accessories bag, are coming in the box. 0 check to ensure there are no corrosive chemicals in the air intake. 0 water supply should be free of chemicals, and water hardness that higher than allowed level may damage the water heater. 0 Ensure there is enough space required for installation.
Prepare for installation Parts included Thankless Use's Manual Assembly Kit Water Heater Tools needed (Not Included) Materials beaded (Not Included) m “9 § Teflon Tape Approved Venting Pressure Relief Valve Materials that may be needed (Not included) @ 0 eb x 1/2-n da 1/2 Hex Nipple ‘Threaded Tes Fitting Hot Water Threaded Male Adapter {Middle 3/47) Isolation Viva Electrical Pl pa Wrap Thermostatic Adhesive Taps Insulation Mixing Valve 15
Keep all the space around the water heater. Failure too so may result in fire and may result in death.injury and or property loss.
fon Warn Notice |For your safety, please read before installation. Before installing the water heater, please contact your local gas supplier or gas management department to select qualified gas pipes, pressure regulators, cylinders, clamps, exhaust pipes, etc., must be entrusted to qualified professional and technical workers to install (please do not Feel free to install yourself, because improper installation will have a great impact on security performance, and even endanger the user's life).
7. There shall be no power line, electrical equipment or gas pipeline above the installation position of the water heater. The horizontal f distance between the water heater and the a electrical equipment shall be greater than gas appliances such as gas ovens and gas 2 © stoves shall not be provided below; and shall TT / not be close to the induction cooker microwave oven. Such as strong electric 8¥ gas inlet radiation appliances. on) B= 8.
Tupi . 1. Determine the installation location (see installation precautions) and determine the Expansion installation height. The height of the water heater's operation display panel and the human eye level are appropriate. 2. When installing the water heater, keep it vertical Plastic plug and do not tilt. 3. As shown on the right, first install the mounting Walden screws. hole on the wall.
Exhaust Pipe Specifications + The maximum length of exhaust vent piping must not exceed 25 ft (7.5 m)for 3" {76.2 mm) venting, which depends on the elevation where the water heater is installed, Do not use more than 3 elbows. See the table below. + When the horizontal vent run exceeds 5 ft (1.5 m), support the vent run at 3 ft {0.9 m) intervals with overhead hangers. 3in (7.5m) *For each elbow added, deduct 5 ft (1.5 m) from max. vent length.
Indoor models must be vented according fo the current version of the National Gas Code "Equipment Exhaust” section: US ANSI z 223.1 / PAN 54 and / or B 149.1 natural gas section 8 Canadian propane and propane installation specifications, And applicable local building codes. General rules for venting water heaters: «+ Place the water heater as close as possible to the vent termination. + Exhaust pipe must be easily removed from the top of the water heater for proper service and inspection.
Vent Termination Clearances Inside comer data ll Legend: [] = vent terminal O = Air supply inlet 0 Area where terminal is not permitted Canadian Installations US Installations? A = Clearance above grade, veranda, porch, deck, or balcony B = | Clearance to window or door for appliances 4 ft (1.
Canadian installations US installations 1 = |Clearance to service regulator | Above a regulator within vent outlet ccm) horizontally of the vertical center line of the regulator vent outlet to a maximum vertical distance of 15 ft (4.5m) 1 = [Clearance to non mechanical altar for appliances 4 ft (1.
Combustion Air Supply combustion and ventilation. Without enough air, your water heater may not:function properly and may cause excessive and abnormal carbon: A The gas water heater requires a sufficient source of clean air for WARNING. monoxide causing: poisoning or death: +The gas water heater requires a sufficient source of clean air for combustion and ventilation.
The instructions below will help determine if the water heater can be installed without outdoor ventilation. Calculate the total Btu/h rating of all equipment. To calculate the required combustion air and ventilation, add the Btu/h rating of all gas appliances {eg water heaters, fum aces, dryers} in the same area. Do not include appliances that are directly ventilated. See the example below. The BTU/h rating of your water heater is on the nameplate.
{645 cm?) installation area if Use metal blinds rated at 75% free zone {100 in*+ 0.75 =134 in?), then A 134 inch 2 (865 cm?) opening is required. If you don't know the % available area of the blinds or grill, use the following values: « For wooden shutters or grilles: 25% « For metal shutters or grilles: 75% follow these rules to ensure that the vents and ducts provide adequate airflow: «+ Each vent must be no less than 100in? (645 cm?).
Provide a permanent textual air opening to draw in enough air. If you want to provide combustion air for outdoor ventilation, go to “Using Outdoor Ventilation Installation”. If the amount of air in the room is greater than the amount of air required, the water heater can be installed without textual ventilation. However, the impact of the exhaust fan must be considered. Exhaust fans can affect the amount of combustion air available in your home.
Gas And Gas Pipe Specifications General «First check that the gas type marches the nameplate; « Make sure that ail gas regulators in use are operating proper and provide: ‘as pressure within the pacified range as shown below. Excessive intake pressure can cause serious accidents. «= Convert this unit from natural gas to propane or vice versa. Contact your. local dealer to get the right device for your gas type.
Gas Connection 1. Install a manual gas shut-off valve between the water heater and the air supply line. 2. When the gas connection is completed, the gas leak test must be performed by applying soapy water to all gas fittings and observing the air bubbles or using a gas leak detection device. « During any system stress test where the test pressure exceeds % psi (3.5 kappa, it must be the water heater and its separate shut-off valve are disconnected from the air supply piping system.
Water Connection Do not use this product if any parts are underwater. Contact the installer or service agency immediately to replace the flooded water WARNING. heater. Do not try to repair the heater. Replacement must bs done! Notice | Do not reverse the hot and cold inlet connections of the water heater. If connected in reverse, the water heater will: not start properly. All piping, fittings, valves and other components, including welding materials, must be suitable for drinking water systems. 1.
Pressure Reducing Valve The water heater has a built-in high temperature disconnect switch as a standard safety function (called a Hi-limit switch), so a “pressure only” safety valve is required. « The unit is not equipped with an approved pressure reducing valve. « An approved pressure relief valve must be installed at the hot water outlet. « The pressure relief valve must comply with ANSI 21.22 « CSA 4.4. Installation must comply with local regulations.
old Water Inlet {Hot Water outlet Pressure relief valve 1 Discharge Line —} (To Suitable Drain) Ball This is a concept drawing only. Electrical Connections + ‘Comply with the electrical code requirements of local authorities with jurisdiction: If there is no such requirement; please follow the current version of the National Electrical Code ANSI / PAN 70 or the current Canadian version of CSA C22.1 Canadian Electrical Code Part 1.
For your safety, please read before operational »: Check for leaks in the gas and water connections for the first time before the ignition. + Open the main gas supply valve of the unit by hand only to avoid any sparks, Never use tools.If the knob does not tum by hand, do not attempt to force rotation; call:a qualified service technician.
The user confirms that the water heater is installed correctly before the initial use, and carefully checks whether the connection is correct and there is no leakage. After confirming, please follow the steps below: First trial. run Tum on the water heater's 120v., 60 Hz power: 1 | supply. Remove debris from the inlet screen. 2 a Open the valve on the inlet water. Tum on the hot water tap, make sure there is. 4 water flowing out, then: tum off the hot water. tap. = z 5 Open the manual gas valve.
Owner's Guide CONGRATULATIONS Congratulations and thank you for choosing our thankless water heater. Before use, we recommend that you read through this installation manual carefully. Keep this manual for future reference. If you need an additional manual, contact the manufacturer or your local distributor. When you call, please tell us the product name and the serial number of your unit written on the rating plate of the water heater.
Operational Safety en FOR YOUR SAFETY READ BEFORE OPERATING J WARNING: If you do not follow these Instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance area for gas.
Steam from flammable liquids can explode and catch fire, causing death or severe bums. Do not use or store flammable products such as benzine, solvents or adhesives in the same room or area near the water heater. Read and follow the water heater wakings and instructions. If the user manual is missing, contact your retailer or manufacturer. Save flammable products: steam: 1. Keep away from the heater. 1. Can't see. 2. In an approved container. 2. Iris heavier than air. 3. Closed, children are not in contact.
Operation Instructions 1 Built-in controller FOR YOUR SAFETY 85 others or as alone oir ARI IOS MOH EAE IO unit of ts can tiv splice: 55 compressor f= Cellulars display —| Display doting comparative Display Shower signal fault code Display water temperature Blower Fd Lama Fahrenheit play Heat down bunion [| CelsiusFahenhsit Heat up bunion A [0] | switch bunion FE 1. The unit's outlet water temperature setting range is 95 °F(35 °C) ~ 149 °F(65 °C); 2.
How to use the mixing valve: on the cold water tap: © AN hot and cold water to get the proper. water temperature: When the use is over, close the water valve. a Zz Minors are not allowed to operate the water heater themselves unless: accompanied by a guardian. « If the temperature is set too high, it may cause hot water buns. « If overheating occurs or the gas supply cannot be turned off; tum off WARNING 41... manual switch gas control valve fo the unit.
Troubleshooting Before You Call For Service Troubleshooting Tips Save time and money! Review the charts on the following pages first and you may not need to call for service. This water heater incorporates a variety of shut off devices that prevents the operation of the water heater down if undesirable combustion conditions occur. Such as the presence of a blockage of the combustion air vent insufficient gas or pressure which can impact the safe operation of the water heater.
Error Code Possible Cause Fault Handling When the system Is turned on, the wired controller displays code "E2” and the buzzer alarms the fault. 1. The feedback pin Is bent and In contact with other metal parts; 2. The feedback pin plug-in terminal is loose and hits the natal part; 3. Feedback pin wire is broken. 1. Replace the Ignition feedback needle assembly; 2. Plug the feedback pin terminal correctly and firmly into the feedback pin; 3.
Error Code Possible Cause Fault Handling When the system is turned on or working, the wired controller displays code “ES” and the buzzer alarms the 1. The fan signal is not detected or the speed is too low in the system startup 5S; 2.
Armor Code Possible Cause Fault Handling When the system | 1. During operation, the fan speed | 1. Hack if the exhaust passage is is muted on or continuously exceeds the set blocked. working, the value of 5S speed; 2. Stop starting, and start after no wired controller 2. The outdoor wind pressure is strong wind in the outdoor; displays too high, and the fan speed 3.
The following phenomenon is not a malfunction: but the fan cannot stop immediately Problem Possible Cause White smoke at the When the outdoor temperature is too low, the discharged exhaust smoke encounters outdoor cold air and condenses into a white mist. Water is not hot If the water flow is too low, the water will get cold. The minimum water flow rate Is required to be 0.55 gallons per minute. Make sure the water heater is running smoothly.
Maintenance It can only be carried out by authorized personnel and cannot be modified privately. For your comfort and safety, we recommend checking and maintaining the product every month. Broken turn on the power and allow the unit to cool before performing maintenance. Do not disassemble the air line and safety devices during maintenance. There are some electronic components in this device. Please do not open, avoid using any kind of liquid to clean electronic components. Daily inspection: 1.
Antifreeze System + This water heater is equipped with an automatic electric heating unit for antifreeze. The specification is 120V 101W. When the temperature is in the range of 3°C (37.4 °F) ~8 °C (46.4 °F), electric heating starts. Make sure the power is on when you need fo start heating. + If you do not use the heater for a long time: 1. Disconnect the water heater from the water source and turn off the water and gas. 2. Discharge the water from the water heater completely.
Gas pressure test position a: Pressure measuring nozzle «The gas inlet has a pressure measuring nozzle.The inlet gas pressure can be measured by unscrewing the screw. Note: Please close the gas valve before connecting the measuring instrument. Avoid accidents such as fires.
FDG-CS80. FDG-CS100: 21 Bummer 1 20 Heating device 1 19 Heat exchange 1 18 Fan module 1 17 Over temperature protection therm 16 Natl-freezing Thermostat 1 15 Computer board 1 14 Back panel 1 13 Power line 1 12 Inlet water temperature probe 1 1" Water flow sensor 1 10 Water Inlet connector 1 9 Proportional valve 1 8 Intake connector 1 7 Manifold 1 8 Water loutish 1 5 Pressure relief valves 1 for Canada 4 Water outlet temperature sensor 1 3 Display assembly 1 2 Front panel 1 1 Decorative paste 1 NO. Name ary.
Packing List Check if the following items are included in the water heater.
