GE GN75ENSRSA Water Heater User Manual
Contents
1. CASCADING MULTIPLE WATER HEATERS The Dual Connect Cable Kit AGTDC1 is an optional GUIDELINES accessory that connects 2 water heaters and allows e Do not install the Dual Connect Cable Kit AGTDC1 them to function as one hot water source with the Multi Connect Kit AGTCK1 and the Multi The Multi Connect Kit AGTCK1 and the Multi Connect Connect Cable Kit AGTMC1 because they are not Cable Kit AGTMC1 are optional accessories that designed to operate together connect 3 to 5 water heaters and allow them to e Water heaters should be installed less than function as one hot water source 18 inches apart so that the cables will reach Refer to the instructions that come with the accessory between units and to prevent temperature the water is shut off and turned back on e Temperature settings can only be changed on the controller for the primary unit NUMBER OF CONNECTED WATER HEATERS ACCESSORIES NECESSARY 1 Multi Connect Kit AGTCK1 and 1 Multi Connect Cable Kit AGTMC1 1 Multi Connect Kit AGTCK1 and 2 Multi Connect Cable Kits AGTMC1 1 Multi Connect Kit AGTCK1 and 3 Multi Connect Cable Kits AGTMC1 E Water Heater Connecting Two Units Z Connecting Five Units Installation Instructions REMOTE CONTROLLER INSTALLATION LOCATION REMOTE CONTROLLER INSTALLATION cont The controller should MOUNTING THE2. Check the type of gas and the gas inlet pressure before connecting the water heater If the water heater is not of the gas type that the building is supplied with DO NOT connect the water heater Contact the dealer for the proper unit to match the gas type Check the gas supply pressure immediately upstream at a location provided by the gas company Supplied gas pressure must be within the limits shown in the Specifications section Before placing the appliance in operation all joints including the heater must be checked for gas tightness by means of leak detector solution soap and water or an equivalent nonflammable solution as applicable Since some leak test solutions including soap and water may cause corrosion or stress cracking the piping shall be rinsed with water after testing unless it has been determined that the leak test solution is noncorrosive Always use approved connectors to connect the unit to the gas line Always purge the gas line of any debris before connection to the water heater The gas supply line shall be gas tight sized and so installed as to provide a supply of gas sufficient to meet the maximum demand of the heater and all other gas consuming appliances at the location without loss of pressure Any compound used on the threaded joint of the gas piping shall be a type which resists the action of liquefied petroleum gas propane LPG Refer to an approved pipe sizing chart if in doubt abou
3. 3 4 Fittings Include Unions Ball Valves Drain Valves Pressure Relief Valve 3 4 Gas Connection NOTE All pipes and fittings shown j in the dashed boxes should LA be located where they will A not freeze Suggest inside Minimum 3 4 Hot Water 3 4 Minimum Minimum 3 4 home or building structure Supply Line Normally Closed Cold Water Solenoid Valve Supply Line 1 4 Minimum Normally Open Solenoid Valve i y Route to Floor Drain This is not an engineered drawing it is intended only as a guide and not as a replacement for 3 4 Ball Valve Pressure Regulator professionally engineered project drawings This i Y drawing is not intended to describe a complete system it is up to the contractor engineer to determine the necessary components for and q Check Valve FRI Soler Drain Valve configuration of the particular system being installed The drawing does not imply compliance K Pressure BERNIE amp solenoid Valve with local building code requirements it is the engineer s contractor s responsibility to ensure the installation is in accordance with all local building codes Confer with local building officials before installation 3 4 Union O Circulating Pump Installation Instructions ELECTRICAL CONNECTION INFORMATION A WARN NG To reduce the risk of fire electrical shock and personal injury The water heater must be elect
4. installations may be different Be sure that the minimum elevation of the bottom of the unit is 18 to meet the 36 recommended clearance for the exhaust CAUTION BURN HAZARD Hot exhaust and vent may cause serious burns Keep back from water heater unit Keep small children and animals away from unit Water and gas through the wall IN Optional Pipe Cover AGTPCM shown shaded Pipe cover not required However consideration should be taken in the design of the rough plumbing to allow installation of unit and pipe cover _ Suggested area for Water and Gas lines to come through the wall to allow the optional pipe cover to be installed if desired CAUTI O N Hot Water outlet pipes leaving unit can be hot to touch Insulation must be used for hot water pipes below 36 due to burn risk to children NOTE It is recommended to install the bottom of the unit at least 18 off the ground to minimize blockage and maintenance from debris and provide room for the optional Pipe Cover Accessory Model Number AGTPCM NOTE Do not install electrical outlet directly below unit Electrical outlet must be installed less than 6 feet from unit Installation Instructions CLEARANCES FOR WATER HEATER To e To floor ground Top of heater Back of heater Front of heater Sides of heater Foorground COMBUSTIBLE MATERIAL As pertaining to m
5. state and local plumbing codes Use the supplied ball valve at the inlet to the system Make sure the gas supply line to the water heater fits in the diagram shown on page 7 This is essential if a pipe cover accessory model number AGTPCM is to be installed IMPORTANT Use a pipe wrench to securely hold on to the end of the water heater gas inlet to prevent twisting the inlet IMPORTANT Leave the gas valve off until instructed to turn it on l Gas Pressure Test Port Gas Shut Off Valve Gas Supply 11 Installation Instructions CONNECTING THE WATER HEATER TO GAS AND WATER cont WATER PIPING GENERAL INSTRUCTIONS e The water supply should be shut off while connecting the water heater Make sure the water inlet and outlet lines to the water heater fit in the diagram shown on page 7 A manual water control valve must be placed in the water inlet connection to the water heater before it is connected to the water line Unions can be used on both the hot and cold water lines for future servicing and disconnection of the unit The piping including soldering materials and components connected to this appliance must be approved for use in potable water systems Purge the water line to remove all debris and air Debris will damage the water heater Toxic chemicals such as those used for boiler water treatment are not to be introduced to
6. Air Inlet Screen Optional Pipe Cover AGTPCM Optional Additional Remote Controller AGTRC1 Installation Instructions DIMENSIONS IN MM From base to gas connection From base to cold connection From base to hot connection From bottom of unit to bottom of exhaust 19 501 65 Installation Instructions FLUE TERMINAL CLEARANCES U S INSTALLATIONS CLEARANCES PER DESCRIPTION ANSI 221 10 3 Clearance above grade veranda porch deck or snowline 36 inches 91 cm Clearance to window or door that may be opened 12 inches 30 cm Clearance to permanently closed window Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet 61 cm from the center line of the terminal ia Clearance to unventilated soffit Clearance to outside corner Clearance to inside corner H Clearance to each side of center line extended above meter regulator i assembly BEE Clearance to service regulator vent outlet Clearance to nonmechanical air supply inlet to building or 12 inches 30 cm the combustion air inlet to any other appliance Clearance to a mechanical air supply inlet 3 feet 91 cm above if within 10 feet 3 m horizontally Clearance above paved sidewalk or paved driveway located on public property Clearance under veranda porch deck or balcony For clearances not specified in ANSI 2223 1 NFPA 54
7. CAUTION before performing this action first remove power to the water heater and be sure not to stand near the discharge line of the pressure relief valve This will prevent a possible scald injury NOTE View shown is from under the unit Turn off and disconnect electrical power Allow water heater to cool Shut off water inlet 3 Open hot water tap at nearest faucet Close outlet valve on unit 5 Have a small pan or bucket ready to catch spilled water 6 Remove and clean the water inlet filter with a small brush If scale is present clean in a white vinegar solution Replace water inlet filter Remove the front panel by removing 4 screws CLEANING THE INLET FILTER cont 9 Use pressurized air to remove dust from the main burner heat exchanger and fan blades Do not use a wet cloth or spray cleaners on the burner Do not use volatile substances such as benzene and thinners They may ignite or fade the paint Use soft dry cloth to wipe cabinet Open water valves Check for leaks Connect electrical power and turn on the unit INSTALLATION CHECKLIST e Ensure 120 Volts A C is connected to the unit and that the circuit is turned on Verify the gas system is functioning correctly by connecting your manometer to the gas pressure test port on the unit see page 11 Operate all gas appliances in the facility The inlet gas pressure on the unit MUST NOT DROP BELOW that listed on
8. CONTROLLER be out of reach of small er 1 Determine a suitable location for children n the controller Avoid locations where the controller may become hot near the oven or radiant heater b Mount a single gang outlet box in the wall where the remote control is indicated HOT WATER TEMP Y e Run the cable between the controller and the water heater or the controller and the other controller Avoid locations in direct sunlight The digital display may be difficult to read in direct sunlight 5 Remove the face plate from the remote controller using a screwdriver Connect the cable to the remote controller Avoid locations where the remote controller could be splashed with liquids aa Mount the controller to the wall in the single gang outlet box installed in step 2 Do not install in locations where it can be adjusted by the public CONFIGURATIONS A maximum of 4 remote controllers can be installed for a water heater or bank of water heaters Controllers can only be wired in parallel Controllers cannot be wired in series If 4 AGTRC1 s are installed press the Priority and On Off buttons on the fourth controller until a beep 1 sounds a wiring hole Disconnect the power from the water heater Remove the cover of the water heater e ee D Remove the plastic cover from the PCB and electrical connections Outline of Remote securing sc
9. Installation outdoor Tankless Water Heater Instructions Models SN7SENSRSA GNOGENSRSA GPO4ENSRSA FOR OUTDOOR APPLICATIONS ONLY A WARN NG Read entire manual Failure to follow all guides and rules could cause personal injury or property damage Check with your state and or local public works department for plumbing codes You must follow their guides as you install the Water Heater NOTE Failure to comply with these installation instructions will void the product warranty and the installer will be responsible for any service repair or damages caused thereby BEFORE BEGINNING INSTALLATION SAFETY PRECAUTIONS Read these instructions completely and carefully A WARNING if the information in these IMPORTANT save these instructions instructions is not followed exactly a fire or explosion for local inspector s use may result causing property damage personal injury IMPORTANT observe all governing ad codes and ordinances A FOR YOUR SAFETY Note to Installer Be sure to leave these Do not store or use gasoline or other instructions with the Consumer flammable vapors or liquids or other combustible materials in the vicinity of this or e Note to Consumer Keep these instructions any other appliance To do so may result in an for future reference explosion or fire Proper installation is the responsibility of the WHAT TO DO IF YOU SMELL GAS installer Do not try to light any appliance Do not touch any ele
10. NG POWER SUPPLY WATER FLOW SENSOR CIRCUIT WATER FLOW CONTROL DEVICE WATER FLOW CONTROL DEVICE CIRCUIT BY PASS FLOW CONTROL DEVICE BY PASS FLOW CONTROL DEVIC CIRCUIT BY PASS SEI DEL ONLY 66 RELAY RELAY DRIVING CIRCUIT ERMAL FUSE SOLENOID DRIVING OVER HEAT SWITCH CIRCUIT am gt THERMISTOR OUTGOING WATER amp THERMISTOR HEAT EXCHANGER THERMISTOR AR TEMPERA THERMISTOR CIRCUIT CENTRAL PROCESSING UNIT MODULATING SOLENOID VALVE MODULATING VALVE POWER CONTROL CIRCUIT FAN ROL FLAME ROD FLAME DETECTING CIRCUIT Oz T TURE INDOOR MODEL ONLY 60 REMOTE FR REMOTE CONTROLER CIRCUIT CONTROLER Notes 22 Notes 23 Notes 24
11. aterials adjacent to or in contact with heat producing appliances vent connectors gas vents chimneys steam and hot water pipes and warm air ducts shall mean materials made of or surfaced with wood compressed paper plant fibers or other materials that are capable of being ignited and burned Such material shall be considered combustible even though flame proofed fire retardant treated or plastered CORROSIVE ATMOSPHERES NOTICE The water heater or intake air supply should not be installed near an air supply containing halogenated hydrocarbons or near swimming pool chemicals MOUNTING THE WATER HEATER A CAUTION Reinforcement of the wall is required in case the wall is not strong enough to hold the water heater Do not mount to drywall unless mounting screws are secured in wall studs Make sure the location of the water heater allows for easy access and operation Wall studs should be utilized when mounting the water heater to the wall On masonry or concrete wall use concrete anchors or lag bolts MOUNTING THE WATER HEATER cont Identify the installation location and confirm that the installation will meet all required clearances Use mounting template to locate screw or anchor locations Securely attach the water heater to the wall using the brackets located at the top and bottom of the water heater Ensure that the attachment strength is sufficient to support the weight Refer to the weight of the water hea
12. azard Hot exhaust and vent may cause serious burns Keep back from water heater unit Keep small children and animals away from unit CAUTI O N Hot Water outlet pipes leaving unit can be hot to touch Insulation must be used for hot water pipes below 36 due to burn risk to children WARNING this unit is not intended or qualified for use in manufactured homes mobile homes or recreational vehicles Installation Instructions PARTS PROVIDED Locate the parts packed with the Water Heater Gas Valve 3 4 FNPT Ball Valve TOOLS YOU WILL NEED e Pipe Wrenches 2 e Gloves e Adjustable Pliers e Safety Glasses e Screwdrivers 2 e Wire Cutters MATERIALS YOU WILL NEED TO SUPPLY Soap Solution e 3 4 Pipe Fittings Pipe Compound Required 5 8 1D PVC Flexible Unions Tubing Ball Valves 2 Conductor 22 AWG Drain Valves Wire for Remote Pressure Relief Valve Control Single Gang Electrical Box Wire Nuts Outdoor Rated Switch and Enclosure Concrete Wall Anchors Optional Your installation components may vary gt G 4 10 x 1 4 Wood Screws Remote Control OTHER TOOLS THAT MIGHT BE REQUIRED e Hammer Drill with Concrete Bits Saw Threading Machine with Heads and Oiler Core Drill with Diamond Head Torch Set Copper Tubing Cutter Steel Pipe Cutter OTHER MATERIALS THAT MIGHT BE NEEDED e Heat Tape Pipe Insulation Electrical Wire and Conduit per Local Code
13. clearances are in accordance with local installation codes and the requirements of the gas supplier Clearance to opposite wall is 24 inches 60 cm 1 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings 2 Permitted only if veranda porch deck or balcony is fully open on a minimum of two sides beneath the floor Installation Instructions FLUE TERMINAL CLEARANCES ANSI 221 10 3 e CSA 4 3 INSIDE CORNER DETAIL VENT TERMINAL AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED ADDITIONAL CLEARANCES VENT TERMINAL Local codes supersede these clearances e Avoid termination locations near a dryer vent e Avoid termination locations near commercial cooking exhaust 0 91 m to ventilated or unventilated soffit or eave vent or to a deck or porch 12 0 30 m to an inside corner 50 mm between terminals at same level INSIDE CORNER Installation Instructions PLANNING FOR PLUMBING shown with optional pipe cover i M e N M Ground The center of the pipes can be placed anywhere within the shaded area The center of the pipes is recommended to be protruding only within 6 of the mounting wall Other specific
14. ctrical switch do not use any phone in your building Immediately call your gas supplier from a A Recognize this symbol as an indication of neighbor s phone Follow the gas supplier s Important Safety Information instructions If you cannot reach your gas supplier call the fire department Do not return to your home until authorized by the gas supplier or fire department Improper installation adjustment alteration service or maintenance can cause property damage personal injury or death Refer to this manual Installation and service must be performed by a qualified installer service agency or the gas supplier Service information and wiring diagram are located behind front panel Service must be performed by a qualified service agency This appliance must be properly grounded and installed as described in these instructions Product failure due to improper installation is not covered under the Warranty 49 50230 1 03 08 JR 1 Installation Instructions A DANGER Read and follow water heater warnings and instructions If owner s manual is missing contact the retailer or manufacturer SAFETY PRECAUTIONS cont A WARN NG Gasoline as well as other flammable materials and liquids adhesives solvents paint thinners etc and the vapors they produce are extremely dangerous DO NOT handle use or store gasoline or other flammable or combustible materials anywhere near or in the vicinity of a water
15. heater or any other appliance Be sure to read and follow the labels on the water heater as well as the warnings printed in this manual Failure to do so can result in property damage bodily injury or death A WARNING bo not use substitute materials Use only parts certified with the appliance e This appliance must be installed inspected and leak tested by a state and city qualified licensed contractor It is the responsibility of the person having the water heater installed to ensure the installing contractor has proper licenses and permits for installing water heaters in your location GE highly recommends that installers attend a product knowledge class to ensure customer satisfaction and warranty coverage Failure to comply with state and local codes pertaining to water heater installations may void the warranty This appliance is not to be installed indoors The installation must conform with local codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 NFPA 54 or the Natural Gas and Propane Installation Code CSA B149 1 e The appliance and its appliance main gas 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 13 84 in W C SAFETY PRECAUTIONS cont e The appliance must be isolated from the gas supply piping system by closing its individual manual shut off valve during any pre
16. ng NOTE See Supplemental Freeze Protection on page 13 Installation Instructions CONNECTING THE WATER HEATER TO THE WATER SUPPLY E ae o Do Os Hot Outlet Shut Off Valve sr Pressure Relief Valve Cold Inlet Shut Off Valve Water connections to the tankless water heater should follow all state and local plumbing codes If this is a standard installation refer to the diagram on the following page under RECOMMENDED PIPING FOR BASIC INSTALLATION If freeze protection valves are being installed refer to the diagram under FREEZE PROTECTION FOR EXTERNAL PIPING on page 15 1 Plumb water supply to the tankless water heater on the 3 4 MNPT connection at the bottom of the unit marked WATER INLET Plumb the home hot water supply to the 3 4 MNPT connection marked WATER OUTLET at the bottom of the unit NOTE Make sure water lines to the water heater fit in the diagram shown on page 7 This is essential if a pipe cover accessory model number AGTPCM is to be installed 13 SUPPLEMENTAL FREEZE PROTECTION If the unit is installed in an environment that can freeze follow state and local codes and apply heat trace to ALL water pipe and fittings located outside attic crawl space or building structure It is highly recommended in areas where freezing temperatures occur to install automatic drain valves that work in the event of a power loss Refe
17. nsure the installation is in accordance with all local building codes Confer with local building officials before installation Installation Instructions FREEZE PROTECTION FOR EXTERNAL PIPING Vacuum Breaker IMPORTANT With electrical power supplied to the water heater it will not freeze in environments as cold as 30 F when protected from direct wind Equipment List exposure Water Heater In the event of a power failure at temperatures below freezing the water heater should be drained of all water to prevent freezing damage The unit may be drained manually or through the installation of the optional solenoid valves as shown The unit may be drained manually however we highly recommend that drain down solenoid valves be installed that will automatically drain the unit if power is lost When the electrical power to the water heater fails the 3 4 solenoid valve closes stopping the flow of water into the heater and the 1 4 solenoid valve opens allowing the water heater and associated piping to drain Ensure that you run the drain for the solenoids to the outside environment to prevent discharging water inside the building which can cause water damage NOTE If the unit is installed in an environment that can freeze follow state and local codes and apply Gas Supply heat trace to ALL water pipes and fittings located 1 outside attic crawl space or building structure Water Heaters Optional
18. r to the diagram in the FREEZE PROTECTION FOR EXTERNAL PIPING section page 15 These valves should be wired to a supply current In the event of a power loss the system will drain automatically Be sure to test this system after installation by turning off power to ensure the system drains properly Installation Instructions RECOMMENDED PIPING FOR BASIC INSTALLATION Water Heater NOTE If unit is installed in an environment that can freeze follow state and local codes and apply heat trace to ALL water pipes and fittings located outside attic crawl space or building structure 3 4 Hot Water Supply Line Equipment List Water Heaters Optional 3 4 Fittings Include Unions Ball Valves Drain Valves Pressure Relief Valve L lt 3 4 Gas Connection Gas Supply 3 4 Cold Water Supply Line lt q For Building Fixtures 3 4 Ball Valve Pressure Relief Valve IO X 3 4 Union Kal Boiler Drain Valve 14 This is not an engineered drawing it is intended only as a guide and not as a replacement for professionally engineered project drawings This drawing is not intended to describe a complete system it is up to the contractor engineer to determine the necessary components for and configuration of the particular system being installed The drawing does not imply compliance with local building code requirements it is the engineer s contractor s responsibility to e
19. rew 3 5 16 securing screw Controllers O o A WARNING oo nor artemer TO CONNECT THE REMOTE CONTROLLERS WITH THE POWER ON Wire Controllers in Parallel CABLE LENGTHS AND SIZE The cable for the remote controller should be a nonpolarized two core cable with a minimum gauge of 22 AWG The maximum cable length from each controller to the water heater depends on the total number of wired controllers connected to the water heater CONTROLLERS CONTROLLER TO WATER HEATER Installation Instructions REMOTE CONTROLLER INSTALLATION cont MOUNTING THE CONTROLLER cont Thread the cable through the access hole at the base of the unit and connect the wires to the controller terminals on the bottom right hand side of the PCB Secure the controller cable using the clamp provided Replace the plastic cover over the PCB and then replace the cover of the water heater REMOTE CONTROL CONNECTION TERMINALS Wu N Baal iL REMOTE CONTROL CABLE CABLE CLAMP CLEANING THE INLET FILTER It is imperative that Water inlet control compartments N burners and circulating air passageways of the appliance be kept clean
20. rically grounded in accordance with local codes and ordinances or in the absence of local codes in accordance with the NATIONAL ELECTRICAL CODE ANSI NFPA NO 70 or the CANADIAN ELECTRICAL CODE CSA C22 1 ELECTRICAL REQUIREMENTS This appliance must be supplied with 120V 60Hz and connected to a properly grounded branch circuit protected by a 15 or 20 amp circuit breaker or time delay fuse If electrical supply provided does not meet the above specifications it is recommended that a licensed electrician install an approved outlet Inside unit wz Wire nuts A A o PCB 120VAC CONNECTION WIRES Black Hot White Neutral GROUND TERMINAL Outside unit Electrical Electrical disconnect switch Y Installation Instructions HIGH ALTITUDE INSTALLATIONS Set dip switches 2 and 3 to the values shown in the A WARN N G Do not adjust the other table below for your altitude The default setting for dip switches unless specifically instructed to do so the appliance is 0 2000 ft 0 610 m with switches If unsure of the altitude in your location call No 2 and No 3 in the OFF position 1 888 HOTWTER 888 467 9837 0 2000 ft 2001 5200 ft 5201 7700 ft 7701 10200 ft 0 610 m 610 1585 m 1585 2347 m 2347 3109 m Switch No Switch No Switch No Switch No
21. ssure testing of the gas supply piping system at test pressures equal to or less than 1 2 psi 3 5 kPa 13 84 in W C The appliance should be located in an area where water leakage of the unit or connections will not result in damage to the area adjacent to the appliance or lower floors of the structure When such locations cannot be avoided it is recommended that a suitable drain pan adequately drained be installed under the appliance The pan must not restrict combustion airflow The flow of combustion and ventilation air shall not be obstructed This appliance is not suitable for use in an application such as a pool or spa heater that uses chemically treated water This appliance is suitable for filling large or whirlpool bath tubs with potable water If a water heater is installed in a closed water supply system such as one having a backflow preventer in the cold water supply line means shall be provided to control thermal expansion Contact the water supplier or local plumbing inspector on how to control this situation Should overheating occur or the gas supply fail to shut off turn off the manual gas control valve to the appliance Keep the air intake location free of chemicals such as chlorine or bleach that produce fumes These fumes can damage components and reduce the life of your appliance CAUTION bo nor operate the water heater if any part of the appliance has been under water CAUTION euRN H
22. sure or possible burn hazards to humans or other plant or animal life Follow local codes Water discharged from the relief valve could cause severe burns instantly scalds or death The pressure relief valve must be manually operated once a year to check for correct operation The relief valve should be added to the hot water outlet line according to the manufacturer s instructions DO NOT place any other type of valve or shut off device between the relief valve and the water heater Do not plug the relief valve and do not install any reducing fittings or other restrictions in the relief line The relief line should allow for complete drainage of the valve and the line If a relief valve discharges periodically this may be due to thermal expansion in a closed water supply system Contact the water supplier or local plumbing inspector on how to correct this situation Do not plug the relief valve Neither GE nor the American National Standard ANSI Z21 10 3 Canadian Standard CSA 4 3 requires a combination temperature and pressure relief valve for this appliance however local codes may require a combination temperature and pressure relief valve INTERNAL BUILT IN FREEZE PROTECTION e The freeze protection features include electrical heating elements and intermittent firing of the burner Freeze protection may be disabled if electricity or gas is not supplied or if there is an error preventing the water heater from functioni
23. t the size of the gas line GAS PIPING cont PIPE SIZING PROCEDURE The gas supply to the home must be capable of handling the entire gas load of the home calculated by adding the BTU rating of each gas appliance in the home State and local codes must be met as well as utility requirements to ensure gas supply to the unit is adequate to meet the rated demand Use the charts below as a guide to size the pipe from the utility meter to the tankless water heater Gas line sizing is based on gas type the pressure drop in the system the gas pressure supplied and the gas line type Refer to the National Fuel Gas Code NFPA 54 and or your local gas provider for proper gas line sizing PIPE SIZING TABLE NATURAL GAS cubic feet per hour Schedule 40 Metallic Pipe Inlet Pressure less than 2 psi 55 inches W C Pressure Drop 0 3 inches W C Specific Gravity 0 60 PIPE SIZE INCHES Length 20 188 353 76 100 600 8 167 343 154 79 148 304 455 70 131 269 403 58 109 224 336 200 54 102 209 313 PIPE SIZING TABLE PROPANE GAS cubic feet per hour Schedule 40 Metallic Pipe Inlet Pressure 11 0 inches W C Pressure Drop 0 5 inches W C Specific Gravity 1 50 5 3 79 70 3 58 54 PIPE SIZE INCHES 172 Th 155 29 6oo Installation Instructions CONNECTING THE WATER HEATER TO THE GAS SUPPLY Connect the gas supply to the system following
24. ter in the Specification Guidelines Four mounting screws with 200 lb tensile load capacity are required at a minimum Wall installation brackets ON WOOD OR SIDING When attaching the unit to wood or siding mount 2 boards suitable for anchoring to wall studs between the studs You can do this before the wall has been finished NOTE Do not hang the unit on wood or siding only The unit must be secured to NOTE Screws provided must fasten securely and directly into wood If screws go through siding or insulation and do not fully engage installer must supply correct screws Installation Instructions MOUNTING THE WATER HEATER cont ON MASONRY OR CEMENT WALL Mount 4 wall anchors not supplied suitable to carry 200 Ibs minimum tensile load each Level the unit during installation IMPORTANT Anchors suitable for masonry or concrete are to be supplied by the installer Installation Instructions CONNECTING THE WATER HEATER TO GAS AND WATER GAS PIPING GENERAL INSTRUCTIONS Make sure gas supply is off prior to making any connections to the water heater A manual gas control valve provided with this water heater must be placed in the gas supply line to the water heater A union can be used on the connection above the shut off valve for the future servicing or disconnection of the unit
25. the potable water used for space heating If the appliance will be used as a potable water source it must not be connected to a system that was previously used with a nonpotable water heating appliance Ensure that the water filter on the water heater is clean and installed See the Cleaning the inlet filter section on page 19 New plumbing typically has contamination in the lines The inlet water filter should be cleaned immediately after initial use CAUTI O N Hot Water outlet pipes leaving unit can be hot to touch Insulation must be used for hot water pipes below 36 due to burn risk to children PRESSURE RELIEF VALVE e Make sure the pressure relief valve is installed so there is clearance if the optional pipe cover AGTPCM is installed e An approved pressure relief valve is required by the American National Standard ANSI Z21 10 3 Canadian Standard CSA 4 3 for all water heating systems e The relief valve must comply with the standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems ANSI 221 22 and or the standard Temperature Pressure Temperature and Pressure Relief Valves and Vacuum Relief Valves CAN1 4 4 WATER PIPING cont PRESSURE RELIEF VALVE cont e The relief valve must be rated up to 150 psi and to at least the maximum BTU hr of the appliance The discharge from the pressure relief valve should be piped to the ground or into a drain system to prevent expo
26. the unit rating plate for the gas type being used A manometer can be used to check the pressure Make sure you have cleaned the COLD water inlet filter screen Inspect HOT outlet and COLD inlet water lines to ensure they have not been crossed and are leak free Ensure the manual gas valve packaged with the water heater is installed in the gas supply line see page 10 Ensure the controller is installed and functioning Instruct the consumer on how to operate the controller Instructions are always supplied in the Owner s Manual see page 18 A typical water temperature set point is 120 degrees e For instructions on operating the unit refer to the Owner s Manual Installation Instructions TECHNICAL DATA PRESSURE DROP CURVE Pressure Loss psi Pressure Loss ft head Water Flow gpm OUTLET FLOW DATA 10 GN94 GP94 Hot Water Flow Rate gpm 50 75 100 delta T Temperature Rise F Installation Instructions LADDER DIAGRAM HOT FROST SENSING 3A FUSE 2 SWITCH CA NEUTRAL ARRESTER ee FROST HEATER Ph VARISTOR N RELAY 1 IGNITION WATER FLOW SENSOR SWITCHI
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