American Water Heater 71681 Water Heater User Manual
Contents
1. Figure 8 Commercial Unit with Auxiliary Storage Heater Forced Circulation With or Without Building Recirculation Top Inlet Outlet Connections IE Outlet Boosted Thermometer Temperature Thermometer Hot Water to Fix Pre Heated Water to the Boosters 5 Check valve Shut off valve X Temperature and Pressure Relief Valve Typical Booster Heater Please note the following DO NOT install this water heater with iron piping The system should be installed only with piping that is suit able for potable drinkable water such as copper CPVC or polybutylene DO NOT use PVC water piping DO NOT use any pumps valves or fittings that are not compatible with potable water DO NOT use valves that may cause excessive restric tion to water flow Use full flow ball or gate valves only DO NOT use 50 50 tin lead solder or any lead based solder in potable water lines Use 95 5 tin antimony or other equivalent material DO NOT tamper with the gas valve thermostat igniter or temperature and pressure relief valve Tampering voids all warranties Only qualified service technicians should service these components DO NOT use with pipi2. electrical supply has the proper overload fuse or breaker protection The water heater draws less than 7 amps Wire sizes and connections comply with all applicable codes Wiring is enclosed in approved conduit if required by local codes water heater and electrical supply are properly grounded This water heater must be hard wired do not use an extension cord to supply electrical power to this water heater Note The wiring diagram can be found on page 17 Always reference the wiring diagram s for the correct electrical connections Caution Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangerous operation Verify proper operation after servicing Electrical Installation 1 Shut off the power at the electrical service box 2 Loosen the screws securing the access panel to the electrical compartment The electrical wiring diagram can be found on the inside of the access panel Set the access panel aside 3 Connect the electrical supply to the water heater in accordance with local utility requirements and codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 and or the CSA C22 1 Electrical Code Use only a dedicated electrical circuit containing a properly sized fuse or circuit breaker Maximum overload protection should not exceed 15 Amperes 4 Connect this circuit directly from the electrical servi
3. LN Pre Heated j AN Water to the Booster Pressure P nd Reducing Valve Note Install a vacuum relief valve if required by local codes Figure 7 Commercial Unit with Auxiliary Storage Heater Forced Circulation With or Without Building Recirculation Front Inlet Outlet Connections 4 Hot Water LN Outlet Thermometer Shut off valve Storage T B an 9 D f N Temperature and Pressure Relief Valve off valve Thermal Expansion Temperature and Pressure Tank Relief Valve Heater Pressure Reducing Valve 1 1 2 Cold water supp 7 I 27007769 Plug Check Sn tot valve Cack Valve Note Install a vacuum Pie P relief valve if required by local codes
4. dards in the United States Important If you lack the necessary skills required to properly install this venting system you should not proceed but get help from a qualified service technician Air Requirements WARNING An adequate air supply shall be provided for combustion and ventilation of this water heater An insufficient supply can result in poor combustion and possible sooting of the burner combustion chamber or flue passageway This may present a potential fire hazard or could create a serious health hazard by producing carbon monoxide General Where an exhaust fan or any other air consuming appliance Eg Clothes dryer furnace etc is installed in the same space as the water heater sufficient air openings must be available to provide fresh air when all appliances are operating simultaneously The area in which the heater is located is classified as either an unconfined space or a confined space An unconfined space is defined as a space having a volume not less than 50 cubic feet per 1000 BTU hour 4 8 cubic meters per kilowatt of combined input rating of all appliances using the space Adjacent open rooms may be included as part of the unconfined space There shall be no closeable doors between these rooms An example of this is an open basement A confined space is one smaller than described above Air shall be supplied through permanent openings as described in Figure 2 At no time
5. Venting Outdoor Air Ducts Gable vent to outdoors U S installations require a dual duct system Draft Hood Damper Installation Do not operate water heater with damper in closed position it must be in the open position during water heater operation Do not negate the action of any existing safety or operational controls Install the supplied draft hood and damper on the flue outlet collar Use only the supplied draft hood and damper DO NOT use any substitute or alter the components in any way Place the damper on the water heater see figure 3A Align the four pilot holes on top of the water heater with the 4 corresponding holes on the damper bracket and secure with the supplied screws Next align the draft hood legs with the 4 corresponding pilot holes on top of the water heater and attach securely with the supplied screws Locate the wiring from the ECO and attach it to the wiring harness on the damper see Figure Once damper is installed ensure that the damper posi tion indicator is visible See figure 3A Figure 3A Flue Damper Assembly Bracket screws Draft hood Draft hood screws Damper motor Damper wiring harness ECO wiring harness Damper position indicator Damper motor Damper wiring harness Damper in OPEN position Flue Outlet Reducer Some units are shipped with a flue outlet reducer See Figure 3
6. the condensation will stop Important It is always recommended that a suitable drain pan be installed under the water heater to protect the area from water damage resulting from normal condensation production a leaking tank or piping connections Under no circumstances is the manufac turer to be held responsible for any water damage in connection with this water heater Water Heater Sounds During the normal operation of the water heater sounds or noises may be heard These noises are common and may result from the following 1 Normal expansion and contraction of metal parts during periods of heat up and cool down 2 Condensation causes sizzling and popping within the burner area and should be considered normal 3 Sediment buildup in the tank bottom will create varying amounts of noise and may cause premature tank failure Drain and flush the tank as directed under Draining and Flushing Smoke Odor The water heater may give off a small amount of smoke and odor during the initial start up of the unit This is due to the burning off of oil from metal parts of a new unit and will disappear after a few minutes of operation Safety Shut off This water heater is designed to automatically shut off in the event of the following 1 The pilot flame is extinguished for any reason 2 The water temperature exceeds 205 F 96 C 21 MAINTENANCE OF YOUR WATER HEATER Draining and Flushing It is recommended that the tank
7. ICM PV MV terminals ground If still Check spark wire ignition control problem for damage amp module ICM see below FOUND continuity Also ALL DAMAGE check spark OK assembly for cracks in ceramic Replace Bad spark or wrong spark E RES ICM assembly or gap Go to wiring between Replace Replace thermostat faulty ICM troubleshooting flow chart component Is there 24V Is there 24V between MV amp between MV amp PV MV terminals PV MV terminals at gas valve at the ICM Does main burner Check for stay lit until blockage in thermostat burner or orifice satisfies also check incoming gas supply Does pilot light thermostat shrink or go out troubleshooting when main flow chart burner fires Is gas flex being used or other small pipe ameriCal FCG3 0805 Copyright by American Water Heater Company 2005 All rights reserved ab AN mm Index ss n DCG3 SERIES THERMOSTAT TROUBLESHOOTING FLOW CHART No voltage or low voltage from purple wire between thermostat board amp ECO board With an ohm meter set at X1 check orange wires on set pot 3 000 ohms at lowest setting and 0 ohms at highest tti setting Take ohm reading from upper sensor and lowest sensor and When slowly turning compare reading with set pot dial from low chart below to high ohm reading A temperature shoul
8. P gas pressure does not exceed by closing its manual shut off valve 13 water column U L recognized fuel gas and carbon monoxide CO Failure to do so can result in death detectors are recommended in all applications and explosion or fire should be installed using the manufacturer s instruc tions and local codes rules or regulations Note Air may be present in the gas lines and could prevent the burner from lighting on initial start up The gas lines should be purged of air by a qualified service technician after installation of the gas piping system Table 2 Natural Gas Pipe Capacity Table Cu ft hr Capacity of gas pipe of different diameters and lengths in cu ft per hr with pressure drop of 0 3 in and specific gravity of 0 60 natural gas Nominal Iron Pipe Length of Pipe Feet Size in 10 20 30 40 50 60 70 80 After the length of pipe has been determined select pipe size which will provide the minimum cubic feet per hour required for the gas input rating of the water heater By formula _ Gas Input of Water Heater BTU HR Cu Ft Per Hr Required aati Heating Value of Gas BTU FT The gas input of the water heater is marked on the water heater data plate The heating value of the gas BTU FT may be determined by consulting the local natural gas utility Table3 A L P Gas Capacity Table Maximum capacity of pipe in thousand
9. Product Service and Support Group at 1 800 456 9805 Anode Rod Inspection Each water heater contains at least one anode rod which will slowly deplete while protecting the glass lined tank from corrosion and prolonging the life of the water heater Certain water conditions will cause a reaction between the rods and the water Once the anodes are depleted the tank will start to corrode eventually developing a leak The most common complaint asso ciated with the anode rod is a rotten egg smell pro duced from the presence of hydrogen sulfide gas dis solved in the water Do not remove this rod permanently as it will void any warranties stated or implied A spe cial anode is available for this complaint This rod may reduce but not eliminate water odor problems The water supply system may require special filtration equipment from a water conditioning company to suc cessfully eliminate all water odor problems Artificially softened water is exceedingly corrosive because the process substitutes sodium ions for mag nesium and calcium ions The use of a water softener may decrease the life of the water heater tank The anode rods should be removed from the water heater tank every 3 years for inspection If the rods are more than 50 depleted the anode rods should be replaced In replacing the anodes Turn off gas supply and electrical power to the water heater 2 Shut off the water supply and open a nearby hot water faucet to depress
10. gas supply line to the gas valve 10 Turn on gas at main shutoff valve 11 Check for gas leaks and proper operation on the unit after servicing Gas Valve Removal and Replacement It is recommended that this maintenance be performed by a qualified service technician 1 Turn the thermostat to its lowest setting 2 Turn off gas at manual gas shut off valve see figure 10 for reference and disconnect electrical power from water heater 2 Unplug the 4 wires located on the gas valve Label wire position for correct reattachment 3 Disconnect pilot tube from the gas valve 4 Disconnect the main gas line from the gas valve Use care not to crack the gas valve housing 5 Carefully unscrew the gas valve from the burner assembly Important When removing gas control valve do not use a pipe wrench or vise to grip the body When replacing the gas valve use an approved Teflon or pipe joint compound on the pipe threads Screw the new gas valve onto the burner assembly Reconnect the pilot tube to the gas valve Reconnect the main gas line to the gas valve 0 Turn the gas supply on and check for leaks Use a chlorine free soap and water solution bubbles forming indicate a leak or other approved method 11 Reconnect the 4 wires to their proper location and restore electrical power to the unit 11 Verify proper operation after servicing this water heater 12 If additional information is required contact the
11. help protect the property from damage which may occur from leaks in the piping connections or tank The pan must limit the water level to a maximum depth of 1 3 4 inches 45mm and be 2 inches 51mm wider than the water heater and piped to an adequate drain The pan must not restrict combustion airflow Locate the water heater near a suitable indoor drain Outside drains are subject to freezing temperatures which can obstruct the drain line The piping should be at least 3 4 19mm ID and pitched for proper drainage Under no circum stances will the manufacturer or seller of this water heater be held liable for any water damage which is caused by your failure to follow these instructions a lt a 9 0 3 Pipe to adequate drain 1 3 4 Max At least 2 greater than the diameter of the water heater Clearances and Accessibility Notice Minimum clearances from combustible materials are stated on the data plate located on the front of the water heater Ifthe water heater is installed in a restaurant or food service location where the floor is cleaned frequently NSF International requires the water heater to maintain 6 inches 150mm of clearance above the floor To comply with the NSF International requirement install leg extension kit For availability contact 1 800 456 9805 water heater is certified for installation on a combustible floor Import
12. installed according to all local and state codes or in the absence of local and state codes the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition Canadian installations must be performed in accordance with CAN CSA B149 1 Note In the State of California the water heater must be braced anchored or strapped to avoid moving dur ing an earthquake Contact local utilities for code requirements in your area or call 1 800 456 9805 and request instructions Site Location e Select a location near the center of the water piping system The water heater must be installed indoors and in a vertical position on a level surface DO NOT install in bathrooms bedrooms or any occupied room normally kept closed Locate the water heater as close to the gas vent as practical Consider the vent system piping and combustion air supply requirements when selecting the water heater location The venting system must be able to run from the water heater to termination with minimal length and elbows Locate the water heater near the existing gas piping If installing a new gas line locate the water heater to minimize the pipe length and elbows water heater should be located in an area not subject to freezing temperatures Water heaters located in unconditioned spaces i e attics basements etc may require insulation of the water piping and drain piping to protect against freezing The drain and controls must be easily
13. system or a water softener be installed and properly main tained Important Heat cannot be applied to the water fittings on the water heater as they may contain nonmetallic parts If solder connections are used solder the pipe to the adapter before attaching the adapter to the hot and cold water fit tings 1 The water heater may have three water piping connec tion points The top and front are 1 1 2 NPT and the connections on the back of some heaters are 2 NPT When using front or back connections a nipple inlet tube combination is required For availability contact 1 800 456 9805 Note Inlet and outlet piping connections cannot be mixed For example a top inlet connection must use a top outlet connection 2 The installation of unions in both the hot and cold water supply lines is recommended for ease of removing the water heater for service or replacement 3 Since most commercial installations utilize higher temperatures the use of a tempering valve is strongly recommended in all domestic hot water lines i e public restroom sinks etc 4 If installing the water heater a closed water system install an expansion tank in the cold water line as specified under Closed System Thermal Expansion Page 12 5 Install a shut off valve in the cold water inlet line It should be located close to the water heater and be easily accessible Know the location of this valve and how to shut off the water to the heater 6 T
14. 2 Set the thermostat to lowest setting Stacking Stacking occurs when a series of short draws of hot water are taken from the water heater tank This causes increased cycling of the burner and can result in increased water temperatures at the hot water outlet A tempering valve should be installed in the hot water supply line to reduce the risk of scald injury Water Temperature Regulation Water temperature over 125 F can cause severe burns instantly or death from scalds Children disabled and elderly are at highest risk of being scalded Feel water before bathing or showering Temperature limiting valves are recommended 3 Turn the gas control knob clockwise f to the off position Do not force The thermostat is adjusted to its lowest temperature setting when it is shipped from the factory Water tem perature can be regulated by moving the temperature dial to the preferred setting The preferred starting point is 120 F 49 C Important Since most commercial installations utilize higher temperatures the use of a tempering valve is strongly recommended in all domestic hot water lines i e public restroom sinks etc Auxiliary commercial equipment i e dishwashers laundry equipment etc may require higher temperature settings Refer to instruction manuals supplied with this type equipment for recommended temperature settings Important Adjusting the thermostat past the 120 F 49 C setting on the temper
15. 6 Clean Out Gasket 8 Clean Out Cower Jacket 9 10 Main Burner Tube s 12 14 Part Name and Description ain Burner Orifice s ontrol Box Cover ansformer nition Control Module hermostat board CO Reset Board ontrol Box iring Harness ode Rod s P Valve mp Control Potentiometer pper Temperature Sensor ECO ower Temperature Sensor lue Damper Q TH
16. AL PR PURPLE WIRING MUST BE REPLACED USE R RED i ONLY TYPE 105 C M GAS THERMOPLASTIC OR EQUIVALENT VALVE CONTROL BOX 1003 615A MN MV PV PV ECO ALARM ALARM 24V 24V GND SENSE PILOT ASSEMBLY 17 18 INSTALLATION CHECKLIST Water Heater Location Requirements Centrally located with the water piping system Located as close to the gas piping and vent pipe system as possible Located indoors and in a vertical position Protected from freezing temperatures Proper clearances from combustible surfaces maintained and not installed directly on a carpeted floor Sufficient room to service the water heater Provisions made to protect the area from water damage Properly sized drain pan installed and piped to an adequate drain Installation area free of corrosive elements and flammable materials vent Pipe System Draft hood and damper properly installed Vent connectors securely fastened with screws and supported properly to maintain 6 152mm clearance Vent pipe and fittings of approved material Acceptable size length and number of elbows on exhaust outlet pipe Installed in accordance with prevailing provisions of local codes or in the absence of such National Fuel Gas Code NFPA 54 ANSI Z223 1 Latest Edition Canadian Installations must be performed in accordance with CAN CSA B149 1 Drafthood or vent pipe should not be obstructed in any way Vent Termination Vert
17. B Use only the flue outlet reducer supplied with this unit The flue outlet reducer should be connected to the top of the flue damper and sealed by high temperature silicon The vent pipe must be installed according to all local and state codes or in the absence of local and state codes the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition Figure 3B Flue Outlet Reducer High Flue outlet reducer temperature silicon sealant Damper motor Damper wiring harness Damper in OPEN position 10 WATER SYSTEM PIPING Piping Installation Piping fittings and valves should be installed according to the installation drawing Figure 4 If the indoor installation area is subject to freezing temperatures the water piping must be protected by insulation Water supply pressure should not exceed 80 of the work ing pressure of the water heater The working pressure is stated on the water heater s data plate If this occurs a pressure reducing valve with a bypass should be installed in the cold water inlet line to the entire system This should be placed on the supply to the entire structure in order to maintain equal hot and cold water pressures Note Water supplied to the unit that exceeds 12 grains 205 mg l total hardness may reduce the life and perform ance of the water heater Depending on the degree of hard ness it is recommended that either a water pre treatment
18. Commercial Gas Water Heater Installation Instructions and Use amp Care Guide for models with prefix DCG and ADCG 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 To obtain technical warranty or service assistance during or after the installation of this water heater call toll free Do nottry to light any appliance Do not touch any electrical switch 1 800 456 9805 do not use any phone in your When calling for assistance please have the following building information ready Immediately call your gas supplier Model number from a neighbor s phone Follow the 7 digit product number gas supplier s instructions Serial number If you cannot reach your gas supplier Date of installation call the fire department Place of purchase by a qualified installer service agency or the gas supplier Table of Contents uec de f Ce era 2 oc RON CERTIFIED 71681 REV A 03 09 Your safety and the safety of others are very important We have provided many important safety messages in this manual and on your appliance Always read and obey all safety messages This is the safety alert symbol This symbol alerts you to potential hazards that ca
19. Responsibilities This manual has been prepared to acquaint you with the installation operation and maintenance of this gas water heater and provide important safety information in these areas Read all of the instructions thoroughly before attempting the installation or operation of this water heater Keep this manual for future reference Do not discard this manual You or future users of this water heater will need it for future reference The manufacturer and seller of this water heater will not be liable for any damages injuries or deaths caused by failure to comply with the installation and operating instructions outlined in this manual The manufacturer of this water heater recommends that it be professionally installed by qualified service technicians Examples of qualified service technicians include those trained in the plumbing and heating industry local gas utility personnel or an authorized service person Massachusetts code requires this water heater to be installed in accordance with Massachusetts Plumbing and Fuel Gas Code 248 CMR Sections 2 00 and 5 00 A data plate identifying this water heater can be found on the front of the water heater When referring to this water heater always have the information listed on the data plate readily available Retain your original receipt as proof of purchase Unpacking the Water Heater WARNING Excessive Weight Hazard Use two or more people to move and install wat
20. accessible for operation and service Maintain proper clearances as specified on the data plate operation of air moving devices such as exhaust fans ventilation systems clothes dryers fire places etc can affect the proper operation of the water heater Note Special attention must be given to the location of these devices and the conditions they may create Flow reversal of flue gases may cause an increase of carbon monoxide inside of the dwelling Important Air for combustion and ventilation must not come from a corrosive atmosphere Any failure due to corrosive elements in the atmosphere is excluded from warranty coverage The following types of installation but not limited to the following will require outdoor air for combustion due to chemical exposure and may reduce but not eliminate the presence of corrosive chemicals in the air e Beauty shops Photo processing labs Buildings with indoor pools e Water heaters installed in laundry hobby or craft rooms e Water heaters installed near chemical storage areas Important The water heater should be located in an area where leakage of the tank or connections will not result in dam age to the area adjacent to the water heater or to lower floors of the structure Due to the normal corrosive action of the water the tank will eventually leak after an extended period of time A suitable metal drain pan should be installed under the water heater as shown below to
21. ace duct 75 000 23 11 7 000 100 000 30 14 9 000 125 000 37 18 12 000 150 000 45 22 14 000 175 000 53 25 16 000 200 000 60 29 19 000 225 000 68 32 21 000 250 000 75 36 23 000 40 43 47 275 000 83 26 000 300 000 90 28 000 30 000 325 000 98 350 000 105 375 000 113 54 35 000 9 225 400 000 120 58 37 000 10 250 Notes 1 Maximum lenght of ducts in column A is 20 equivalent feet 6 1 meters 2 Maximum lenght of ducts in column B is 50 equivalent feet 15 2 meters c EQUIPMENT LOCATED IN CONFINED SPACES ALL AIR FROM OUTDOORS For American installations When supplying air directly from the out doors using horizontal ducting each opening shall have a free minimum area of one square inch per 2 000 BTU hour 11 cm kW of total input rating of all appliances in the confined space For Canadian installations Refer to Table 1 of part b d EQUIPMENT LOCATED IN CONFINED SPACES ALL AIR FROM OUTDOORS THROUGH VENTILATED ATTIC For American installations When supplying air directly through vertical ducting each opening shall have a free minimum area of one square inch per 4 000 BTU hour 5 5 cm kW of total input rating of all appli ances in the confined space Figure 2 Equipment Location and Combustion Ventilation Air Requirements Contined Permanent Openings Permanent Fi l Ventilation Confined Space Combustion
22. ant If installing over carpeting the carpeting must be protected by a metal or wood panel beneath the water heater The protective panel must extend beyond the full width and depth of the water heater by at least 3 inches 76mm in any direction or if in an alcove the entire floor must be covered by the panel The panel must be strong enough to carry the weight of the water heater when full of water Figure 1 may be used as a reference guide to locate the specific clearance locations A minimum of 24 inches 610mm of front clearance and 4 inches 102mm on each side should be provided for inspection and service Figure1 Minimum Clearance Locations 4 Sides Top View Front 24 min for service Vent Front View COMBUSTION VENT PIPE SYSTEM WARNING Carbon Monoxide Hazard Follow all instructions to locate and install the vent pipe system Instructions can be found in this manual in state or local codes or the authority having jurisdiction or in the absence of such the National Fuel Gas Code ANSI Z223 1 NFPA 54 Latest Edition Canadian installations must be performed in accordance with CAN CSA B149 1 Failure to properly locate and install the vent pipe system can result in death explosion or carbon mo
23. ature dial see Figure 13 will increase the risk of scald injury Hot water can pro duce first degree burns within 120 F 49 C more than 5 min utes Figure 13 Temperature Dial 130 F 54 C at 20 seconds 140 F 60 C at 3 seconds 150 F 66 C at 1 1 2 seconds 160 F 71 C at less than 1 sec ond Each water heater consists of a mechanical tempera ture stop set to 140 F 60 C To set to a different set ting remove the temperature dial knob loosen the shaft nut and re position the mechanical temperature stop Tighten the shaft nut and replace the temperature dial knob Emergency Shut Down Important If overheating occurs or the gas supply fails to shut off close the manual gas supply valve and turn the gas control knob to the off position Turn off the electrical supply to the unit and close the cold water supply valve Do not operate the water heater again until it has been thoroughly checked by a qualified service technician Checking the Draft A WARNING Burn Hazard Do not touch vent ERUS Eod can result in After successfully lighting the water heater allow the unit to operate for 15 minutes and check the drafthood relief opening for proper draft Pass a match flame around the relief opening of the drafthood See Figure 14 A steady flame drawn into the opening indicates proper draft If the flame flutters or is blown out combustion products are escaping from the relief opening If thi
24. be drained and flushed every 6 months to remove sediment which may buildup during operation Note Warranty is null and void in the event lime amp scale deposits are allowed to exceed two inches in depth The water heater should be drained if being shut down during freezing temperatures To drain the tank perform the following steps 1 Turn off the gas to the water heater at the manual gas shut off valve and turn off electricity 2 Close the cold water inlet valve 3 Open nearby hot water faucet 4 hose to the drain valve and terminate it to an adequate drain Note The drain hose should be rated for at least 200 F 49 C If the drain hose does not have this rating open the cold water inlet valve and a nearby hot faucet until the water is no longer hot Open the water heater drain valve and allow all the water to drain from the tank 6 Remove the screws holding the cleanout plate then remove the plate for access 7 Remove any lime sediment or scale from the tank Be careful not to damage the glass lining 8 Flush the tank with water as needed to remove any remaining sediment 9 Check gasket on cleanout plate replace if necessary 10 Replace the cleanout plate and screws tighten sufficiently 11 Close the drain valve refill the tank and restart the water heater as directed under Operating Your Water Heater If the water heater is going to be shut down for an extend ed period the drain valve shoul
25. ce box to an electrical disconnect switch 5 Ground the water heater by connecting the electrical service ground wire to the green ground wire provided Note The power supply to this water heater must be properly polarized 120 volts from the hot lead black to ground and O volts from the neutral lead white to ground otherwise the unit will not operate 6 After making all electrical connections completely fill the tank with water and check all connections for leaks Open the nearest hot water faucet and let it run for 3 minutes to purge the water lines of air and sediment and to ensure complete filling of the tank The electrical power may then be turned on 17 WIRING DIAGRAM L1 HOT ALARM CONTACTS SCHEMATIC DIAGRAM 120 VAC TRANSFORMER RESET BOARD L8104B OPERATOR 12 NEU FLAME SPARK SPARK MV MV PV PV ECO ALARM ALARM 24V 24V GND SENSE SENSOR IGNITOR 1003 615A IGNITION MODULE CONNECTION DIAGRAM IGNITION MODULE VENT DAMPER PLUG UPPER POTENTIOMETER SENSOR ECO BK R BL PRI R B LOWER SENSOR d i LC yH Es 4 115 SUPPLY __ 40 VA TRANSFORMER KEY BK BLACK TERMINAL T 3 BL BLUE BLOCK WEK BR BROWN G GREEN R GY GRAY e Y O ORANGE He NOTE IF ANY OF THE ORIGIN
26. d be a smooth OK reading from a water transition with no sample taken from skips jumps or T amp P valve is also Check ECO glitches needed for this test and ICM OHMS OK NO Will ECO board YES reset YES High water temperature Check orange wire from ECO board to damper for 24V Replace thermostat circuit board Check purple wire from thermostat for 24V Sensor Resistance vs Temperature Resistance K ohms Temp L2 12 5 e56 S8 UC 32648 20875 107 19898 13071 12492 8409 057 7722 7403 7099 6808 8532 6268 6016 5775 5546 5327 021 or sss ser 855 801 786 763 7411 719 698 50 F 70 F 7000 100 140 Teo rigor 1170 1150 1129 1110 1090 3071 1053 1035 1017 999 190 200 FCG3 0805 Copyright by American Water Heater Company 2005 All rights reserved 26 REPAIR PARTS ILLUSTRATION When ordering repair parts always give the following information 1 Model serial and product number 2 Type of gas 3 ltem number 4 Parts description Repair Parts List Part Name and Description rafthood iptube Top iptube Front Optional not pictured iptube Back Optional not pictured lue Baffles lean Out Gasket lean Out Cover lean Out Cover Jacket ain Valve ain Burner Tube s rner Tray ilot Burner Assembly ain Burner Manifold as Valve jew 10 lt 12 13 14 79 No
27. d be left open Important Condensation may occur when refilling the tank and should not be confused with a tank leak Routine Preventative Maintenance At least annually a visual inspection should be made of the venting and air supply system piping systems main burner and pilot burner Check the water heater for the following e Obstructions damage or deterioration in the venting system Make sure the ventilation and combustion air supplies are not obstructed Build up of soot and carbon on the main burner and pilot burner Check for a soft blue flame Leaking or damaged water and gas piping Presence of flammable or corrosive materials in the installation area Presence of combustible materials near the water heater Verify proper operation after servicing this water heater Important If you lack the necessary skills required to prop erly perform this visual inspection you should not proceed but get help from a qualified service technician Temperature and Pressure Relief Valve AWARNING Explosion Hazard If the temperature and pressure relief valve is dripping or leaking have a qualified service technician replace it Do not plug valve Do not remove valve Failure to follow these instructions can result in death or explosion Manually operate the temperature and pressure relief valve at least once a year to make sure it is working prop erly See Figure 16 To prevent water damage the
28. e the temperature and pressure relief valve 13 Temperature and Pressure Relief Valve AWARNING Explosion Hazard If the temperature and pressure relief valve is dripping or leaking have a qualified service technician replace it e Do not plug valve Do not remove valve Failure to follow these instructions can result in death or explosion Figure 9 T amp P Relief Valve Temperature and Pressure Relief Valve Discharge line 6 max above drain Drain line 3 4 ID min For protection against excessive pressures and temperatures a temperature and pressure relief valve must be installed in the opening marked T amp P RELIEF VALVE See Figure 9 This valve must be design certified by a nationally recognized testing laboratory that maintains periodic inspection of the production of listed equipment or materials as meeting the requirements for Relief Valves and Automatic Shut off Devices for Hot Water Supply Systems ANSI Z21 22 5 4 4 Temperature Pressure Temperature and Pressure Relief Valves and Vacuum Relief Valves in Canada The function of the temperature and pressure relief valve is to discharge water in large quantities in the event of excessive temperature or pressure devel oping in the water heater The valve s relief pressure must not exceed the working pressure of the water heater as stated on the data plate Important Only a new temperature and pressure relief valve should be used
29. er heater unless proper handling equipment is utilized Failure to do so can result in back or other injury Removing Packaging Materials Important Do not remove any permanent instructions labels or the data label from outside of the water heater or on the inside of panels Remove exterior packaging and place installation components aside e nspect all parts for damage prior to installation and start up Completely read all instructions before attempting to assemble and install this product After installation dispose of packaging material in the proper manner WARNING vapors from flammable liquids will explode and catch fire causing death or severe burns Do not use or store flammable products such as gasoline solvents or adhesives in the same room or area near the water heater Keep flammable products far away from heater in approved containers tightly closed and out of children s reach This water heater has a main burner and an automatic ignition system The ignition system 1 can come on at any time and 2 will ignite flammable vapors Vapors 1 cannot be seen 2 are heavier than air 3 go along way on the floor and 4 can be carried from other rooms to the water heater by air currents Do not install this water heater where flammable products will be stored Installation Requirements The water heater must be
30. he water heater is shipped with a factory installed Temperature and Pressure Relief Valve Install a discharge line in the opening in the T amp P valve see instructions on Page 13 7 After piping has been properly connected to the water heater remove the aerator at the nearest hot water faucet Open the hot water faucet and allow the tank to completely fill with water To purge the lines of any excess air keep the hot water faucet open for 3 minutes after a constant flow of water is obtained Close the faucet and check all connections for leaks Space Heating If this unit is to be used to supply both space heating and domestic potable drinking water then the following instructions must be followed 1 All piping and components used must be suitable for use with domestic potable drinking water 2 Do not use piping or components that have been connected to a nonpotable system or treated with chromates or other toxic chemicals Do not add any chemicals to the water heater piping 3 If system requires temperatures in excess of 120 F 49 C install a tempering valve per the manufacturers instructions in the domestic potable hot water line to limit the risk of scalding See Figure 5 4 Be sure to follow the manual s shipped with the heating system Also follow any state or local codes Figure 4 Water Piping Installation In a closed system use a Thermal Expansion Tank Cold Water Hot Water Supply to Fixtu
31. ical Vertical gas vents must terminate with a listed cap or other roof assembly and be installed according to their manufacturer s instructions Water System Piping Temperature and pressure relief valve properly installed with a discharge line run to an open drain and protected from freezing All piping properly installed and free of leaks e Water heater completely filled with water e properly sized expansion tank must be installed on all closed systems e Atempering valve should be installed per the manufacturer s instructions Gas Supply and Piping If using a flexible gas connector make sure its rating tag matches or exceeds the input of the water heater Adequate pipe size and of approved material e Gas supply is the same type as listed on the water heater data plate Gas line equipped with full opening shut off valve union and drip leg Approved pipe joint compound used e Chloride free soap and water solution or other approved means used to check all connections and fittings for possible gas leaks Electrical Connections Unit must be hard wired to a dedicated 120V power supply Proper polarity e Water heater properly grounded e Installed in accordance with prevailing provisions of local codes or in the absence of such National Electrical Code ANSI NFPA 70 and or the CSA C22 1 Electrical Code 19 OPERATING YOUR WATER HEATER Read and understand these directions thorough
32. ing Water and T oxic Enforcement Act requires the Governor of California to publish a list of substances known to the State of California to cause cancer birth defects or other reproductive harm and requires businesses to warn of potential exposure to such substances Warning This product contains a chemical known to the State of California to cause cancer birth defects or other reproductive harm This appliance can cause low level exposure to some of the substances listed including formaldehyde carbon monoxide and soot INSTALLATION INSTRUCTIONS Consumer Information This water heater is design certified by CSA International as a Category 1 non direct vented water heater which takes its combustion air either from the installation area or from air ducted to the unit from the outside This water heater must be installed according to all local and state codes or in the absence of local and state codes with the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition Canadian installations must be performed in accordance with CAN CSA B149 1 This is available from the following American Gas Association 1515 Wilson Boulevard Arlington VA 22209 National Fire Protection Agency 1 Batterymarch Park Quincy MA 02269 Canadian Standards Association 5060 Spectrum Way Mississauga ON LAW 5N6 Check the phone listings for the local authorities having jurisdiction over this installation Installer and Owner
33. ly before attempting to operate the water heater see Lighting Instructions on page 20 Check the data plate on the front of the water heater for the correct gas Do not use this water heater with any gas other than the one listed on the data plate If you have any questions or doubts consult your gas supplier or gas utility com pany L P Propane Models Propane gas is heavier than air and in the occurrence of a leak in the system the gas will settle on the floor level Basements crawl spaces skirted areas under mobile homes even when ventilated closets and areas below ground level will serve as pockets for the accumulation of gas Before lighting a propane gas water heater smell all around the appliance at floor level If you smell gas follow the instructions as given in the warning on the front page When your propane tank runs out of fuel turn off the gas at all gas appliances including pilot lights After the tank is refilled all appliances must be re lit according to their manufacturer s instructions Water Heater Operation When the thermostat calls for heat it will signal the damper to open Once the damper fully opens it will signal the igniter to light the pilot The pilot will then ignite the main burners The water heater will operate until the call for heat ends At this time the main burners and pilot will shut off and the damper will close See Figure 12 below for a sequence of operation flowchart Fig
34. n kill or hurt you and others All safety messages will follow the safety alert symbol and either the word DANGER or WARNING These words mean A DANG ER You can be killed or seriously injured if you don t immediately follow instructions Y be killed iously injured if don t AWARNING safety messages will tell you what the potential hazard is tell you how to reduce the chance of injury and tell you what can happen if the instructions are not followed Important Instructions Do not use this appliance if any part has been under water Immediately call a qualified service technician Water heaters subjected to flood conditions or anytime the gas controls main burner or electrical components have been submerged in water require replacement of the entire water heater Hydrogen gas can be produced in a hot water system that has not been used for a long period of time generally two weeks or more Hydrogen gas is extremely flammable and can ignite when exposed to a spark or flame To prevent the possibility of injury under these conditions we recommend the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance which is connected to the hot water system If hydrogen is present there will probably be an unusual sound such as air escaping through the faucet as water begins to flow Do not smoke or have any open flame near the faucet at the time it is open The California Safe Drink
35. ng that has been treated with chromates boiler seal or other chemicals DO NOT add any chemicals to the system piping which will contaminate the potable water supply Thermal Expansion p Pressure ank Br Reducing Valve 1 1 2 Cold water supply 1 4 Temperature Pressure Relief Valve Pre Heater Note Install a vacuum relief valve if required by local codes Closed System Thermal Expansion Periodic discharge of the temperature and pressure relief valve may be due to thermal expansion in a closed water supply system The water utility supply meter may contain a check valve backflow preventer or water pressure reducing valve This will create a closed water system During the heating cycle of the water heater the water expands causing pressure inside the water heater to increase This may cause the temperature and pressure relief valve to discharge small quantities of hot water To prevent this it is recommended that a diaphragm type expansion tank suitable for potable water be installed on the cold water supply line The expansion tank must be properly sized for the application Contact the local water suppli er or plumbing inspector for information on other meth ods to control this situation Important Do not plug or remov
36. noxide poisoning Combustion Combustion air must be free of acid forming chemicals These chemicals are found in aerosol sprays deter gents bleaches cleaning solvents air freshener paint and varnish removers refrigerant and many other com mercial products When burned vapors from these products form highly corrosive acid compounds These products should not be stored or used near the water heater or air inlet Venting Vent pipe installation must be installed according to all state and local codes or in the absence of local and state codes the National Fuel Gas Code NFPA 54 ANSI Z223 1 latest edition Canadian installations must be performed in accordance with CAN CSA B1 49 1 It is the responsibility of the installing contractor to provide a vent adequate in capacity and in good usable condition Btu hr capacity limitations are governed by the style and height of the vent chimney For installa tions in the United States capacity tables are available in the National Fuel Gas Code ANSI Z223 1 latest edi tion Canadian installation information can be found in CAN CSA B149 1 U L recognized fuel gas and carbon monoxide CO detectors are recommended in all applications and should be installed using the manufacturer s instructions and local codes rules or regulations Important Check to make sure the vent pipe is not blocked in any way e Venting should be as direct as possible with minimum number of pipe fit
37. poisoning Gas Requirements Read the data plate to be sure the water heater is made for the type of gas being used This information will be found on the data plate located on the front of the water heater If the information does not agree with the type of gas available do not install or operate the water heater Call your dealer Note An odorant may be added by the gas supplier to the gas used by this water heater This odorant may fade over an extended period of time Do not depend upon this odorant as an indication of leaking gas Gas Piping The gas piping must be installed according to all local and state codes or in absence of local and state codes with the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest edition Canadian installations must be per formed in accordance with CAN CSA B149 1 Note If using a flexible gas connector make sure its rating tag matches or exceeds the input of the water heater Tables 2 3A and 3B on page 15 provide a sizing reference for commonly used gas pipe materials Consult the National Fuel Gas Code or Natural Gas and Propane Installation Code for the recommended gas pipe size of other materials Follow the instructions below and reference Figure 10 for gas piping installa tion 1 Install a readily accessible manual shut off valve in the gas supply line as recommended by the local utility Know the location of this valve and how to turn off the gas to this unit 2 In
38. res Outlet a Main Water Supply Pressure Reducing Valve with Bypass Cold Water Inlet Valve Temperature and Pressure Relief Valve Discharge line 6 max above drain Drain line 3 4 ID min Massachusetts Install a vacuum relief in cold water line per section 19MGL 142 f Drain Tempering Valve Installation A Tempering Valve should be installed per the manufac turer s instructions in the hot water line See Figure 5 below for sample tempering valve installation Figure 5 Tempering Valve Follow the tempering valve manufacturer s instructions Tempered water to fixtures Tempering valve Set to 120 F Figure 6 Commercial Unit with Auxiliary Booster Heater Two Temperature With or Without Building Recirculation Hot Water P Shut off valve Temperature and hermometer Pressure Relief Valve Temperature and Pressure Relief Valve he 4 Thermometer ace Shut off valve Typical Check Valve Pre Heater Booster Heater Thermal Shut off valve Expansion Tank 1 1 2 Cold Shut off valve water supply
39. s occurs do not operate the water heater until proper adjustments or repairs are made to the vent pipe system Figure 14 Vent Draft Test Burner Flames Inspect the burner flames through the viewport and compare them to the drawings in Figure 15 A properly operating burner should produce a soft blue flame and be about 2 51mm to 2 1 2 64mm in height Blue tips with yellow inner cones are satisfactory The tips of the flame may have a slight yellow tint The flame should not be all yellow or have a sharp blue orange color Contaminated air may cause an orange colored flame Contact a qualified service technician if the flame is not satisfactory Figure 15 Pilot Burner Flame Operational Conditions Condensation Moisture from the products of combustion condenses on the tank surface and the outside jacket of the water heater and forms drops of water which may fall onto the burner or other hot surfaces This will produce a siz zling or frying noise This condensation is normal and should not be confused with a leaking tank Condensation may increase or decrease at different times of the year High efficient energy saver water heaters will produce larger amounts of condensation on initial start up or when a large amount of hot water is being used Do not confuse this with a tank leak Once the water reaches a temperature of 120 F 49 C and the tank warms up usually 1 2 hours
40. s of BTU per hour of undiluted liquefied petroleum gases at 11 inches water column pressure Based on a Pressure Drop of 0 5 Inch Water Column Nominal Iron Pipe Length of Pipe Feet Size in n a n a n a 196 185 173 378 346 322 771 724 677 Example Input requirement of the water heater 199 000 BTUH Total pipe length 80 feet 1 IPS required L P Gas Capacity Table Maximum capacity of pipe in thousands of BTU per hour of undiluted liquefied petroleum gases at 11 inches water column pressure Based on a Pressure Drop of 0 5 Inch Water Column Copper Tubing OD Length of Pipe Feet Size in 10 20 30 40 50 60 80 100 125 141 n a n a 239 192 164 146 132 n a n a n a 368 296 253 224 203 174 154 137 Example Input BTU requirement of the water heater 199 000 BTUH Total pipe length 50 feet 7 8 IPS required 16 ELECTRICAL CONNECTIONS WARNING Electrical Shock Hazard Disconnect power before servicing Replace all parts and panels before operating Failure to do so can result in death or electrical shock If you lack the necessary skills required to properly install the electrical wiring to this water heater do not proceed but have a qualified service technician perform the installation When making the electrical connections always make sure voltage and frequency correspond to that specified on the water heater data plate on the front of the water heater
41. shall an air opening have a dimension of less than 3 75 mm and at no time shall any top opening be lower than the top of the water heater For buildings that are not well sealed do not have tight fitting doors and windows natural air infiltration may provide sufficient air required for combustion and venti lation For buildings using tight construction newer and renovated structures the air supply shall be introduced from the outdoors regardless of whether the space is confined or unconfined Combustion Air Supply Ducts Air supply ducts shall be of galvanized steel or equiva lent corrosion resistant material A single air duct may not be substituted when required for upper and lower air openings Horizontal upper combustion air ducts shall not slope downward toward the air inlet Louvers and Grills Openings for air supply ducts must provide free unob structed air movement Louver and grill openings must be sized to ensure that the FREE OPEN AREA is never less than the area of the air duct LOCATION The location for top and bottom openings are as fol lows For U S installations The top opening shall com mence within 12 300 m of the top of space and the bottom opening shall commence within 12 300mm of the bottom of the enclosure For Canadian installations The top opening shall be located as close to the ceiling as practical but never lower than the relief opening of the lowest draft control de
42. stall a drip leg as shown The drip leg must be no less than 3 inches 76mm long for the accumula tion of dirt foreign material and water droplets 3 Install a ground joint union between the water heater and the manual shut off valve This is to allow easy servicing 4 Turn the gas supply on and check for leaks Use a chloride free soap and water solution bubbles forming indicate a leak or other approved method Figure 10 Gas Piping Manual Gas Shut off Valve D 6 rH Io Ground 41 Joint Union Check with local utility for min height Drip leg p po ie Gas Pressure Important The gas supply pressure must not exceed the maximum supply pressure as stated on the water heater s data plate Minimum supply pressure should also be maintained per the data plate Gas Pressure Testing Important This water heater and its gas connection AWARN G must be leak tested before placing the appliance in operation e code requires the gas lines to be tested at a pressure of 14 W C or greater the water heater and its manual shut off valve must be disconnected from the gas supply piping system and the line capped Explosion Hazard e Ifthe gas lines are to be tested at a pressure Y A eT less than 14 WiC the water heater must Have a qualified service technician make be isolated from the gas supply piping system sure L
43. tings Exhaust gas vents must be installed with U L listed type B vent pipe according to the vent manufacturer s instructions and the terms of its listing Single wall vent connectors must have 6 152mm of clearance from unprotected com bustible surfaces f sidewall venting is necessary a power vent kit is required For availability contact 1 800 456 9805 e Vents that run through unconditioned spaces where below freezing temperatures are expect ed should be properly insulated to prevent freezing e Existing vent systems must be inspected for obstructions corrosion and proper installation e Vents must be connected to the water heater s drafthood by a certified vent connector or by directly originating at the drafthood opening e Vertical gas vents must terminate with a listed cap or other roof assembly and be installed according to their manufacturer s instructions Horizontal vent connections must have an upward slope of at least 1 4 6mm per foot 305mm e Gas vents must be supported to prevent damage joint separation and maintain clearances to combustible materials e Vent connection joints should be fastened by sheet metal screws or by other approved methods Vent and vent connectors should have adequate support to keep weight off the draft hood All pipe fittings and procedures must conform to American National Standard Institute and American Society for Testing and Materials ANSI ASTM stan
44. ure 12 Sequence of Operation ELECTRICAL POWER APPLIED TO UNIT THERMOSTAT CALLS FOR HEAT WATER HEATER OPERATES TILL CALL FOR HEAT ENDS THERMOSTAT SATISFIES BURNER amp PILOT SHUT OFF DAMPER CLOSES DAMPER OPENS PILOT IGNITES PILOT IGNITES BURNER OPERATING INSTRUCTIONS STOP Read the safety information above on this label Turn off all electric power to the appliance Set the thermostat to the lowest setting This appliance is equipped with an ignition device which automatically lights the pilot Do not try to light the pilot by hand Turn the gas control knob clockwise 4Vto the OFF position Do not force Gas Control Knob x Q OFF POSITION 6 Wait ten 10 minutes to clear any gas If you then smell gas STOP Honeywell Gas Valve above on this label If you don t smell gas go to the next step Follow B in the safety information 7 Turn gas control knob counterclockwise 4X to ON 8 Set thermostat to desired setting 9 Turn on all electric power to the appliance 10 If the appliance will not operate after three automatic tries follow these instructions once more If the appliance still refuses to light follow the instruc tions To Turn Off Gas To Appliance and call a qual ified service technician TO TURN OFF GAS TO APPLIANCE 1 Turn off all electric power to the appliance if service is to be performed
45. urize the water tank 3 Drain approximately 5 gallons 191 of water from tank Refer to Draining and Flushing for proper procedures Close drain valve 4 Remove old anode rods 5 Use Teflon tape or approved pipe sealant on threads and install new anode rods 6 Turn on water supply and open nearby hot water faucet to purge air from water system 7 Restart the water heater as directed under Operating Your Water Heater See the Repair Parts Illustration for anode rod location O ON 23 DCG3 SERIES COMMERCIAL GAS DAMPERED WATER HEATERS High water temp YES Will ECO light Check continuity t t No HotWater MENA T OPEN Goto Power to CLOSED thermostat i NO YES Is ECO light on NO troubleshooting YES Check for 24V between purple NO When thermostat yo is turned up and white wires does pilot spark on the ignition Is ground good from control module to incoming ground control module Check for 24V YES ICM between PV amp NO Does pilot light YES Repair YES PV MV terminals on gas valve YES NO Check for 24V between PV amp MV PV terminals Ground Check for 24V between orange YES amp white wires on damper harness NO ignition control module ICM Check for 24V Clean flame Replace YES Bypass damper orange amp purple wires if heater fires then replace damper between PV amp sensor check
46. valve must be properly connected to a discharge line which ter minates at an adequate drain Standing clear of the outlet discharged water may be hot slowly lift and release the lever handle on the temperature and pressure relief valve to allow the valve to operate freely and return to its closed position If the valve fails to completely reset and contin ues to release water immediately shut off the manual gas valve electric power and the cold water inlet valve and call a qualified service technician Figure 16 T amp P Valve Test Temperature and Pressure Relief Valve Manual Relief x Discharge line to drain 23 Pilot Burner and Main Burner Assembly Inspection To access the pilot burner and main burner for inspec tion 1 Turn off gas at main shutoff valve and turn off electrical power 2 Disconnect the gas supply line from the gas valve 3 Remove the 2 screws holding the Pilot amp Main Burner Assembly in place See Figure 17 for location of screws Figure 17 Pilot Burner Assembly Removal 4 Carefully slide the assembly out of the water heater 5 If needed use a brush or vacuum to clean any soot or debris from the burners 6 Check for correct alignment of burners before sliding assembly back into the water heater 7 Carefully slide Pilot Burner Assembly back into the water heater 8 Replace and sufficiently tighten the two screws holding the Pilot Burner Assembly in place 9 Reconnect the
47. vice The bottom opening shall be located neither more than 18 inches 450 mm nor less than 6 inches 150 mm above floor level Air Opening Requirements a EQUIPMENT LOCATED IN CONFINED SPACES ALL AIR FROM INSIDE THE BUILDING Two permanent openings top and bottom shall be provided connecting the confined space e g closet small room with the unconfined space Each opening shall have a free area of one square inch per 1 000 BTU hour 22 cm kW input of all appliances in the confined space but not less than 100 square inches 645 cm b BASEMENT INSTALLATION EQUIPMENT LOCATED IN CON FINED SPACES ALL AIR FROM OUTDOORS Outside air inlets shall be a minimum of 12 300mm above the grade snow line When supplying air directly from the outdoors For American installations Two openings top and bottom shall be provided with each opening having a minimum free area of one square inch per 4 000 BTU hour input 5 5 cm kW of total input rating of all appliances in the confined space For Canadian installations Canadian codes specify single air supply source Canadian customers and authorities having jurisdiction may use the sizing listed in Table 1 When using a single air supply the duct shall terminate within 1 foot 300 mm above and within 2 feet 600 mm hori zontally from the burner level of the appliance having the largest input Table 1 Combined input of all equired appliances in free area of diameter confined sp
48. with this water heater Do not use an old or existing valve as it may be damaged or not adequate for the working pressure of the new water heater Do not place any valve or piping between the relief valve and the tank The Temperature amp Pressure Relief Valve Must not be in contact with any electrical part e Must be connected to an adequate discharge line Must not be rated higher than the working pressure shown on the data plate of the water heater The BTUH rating of the T amp P valve must be greater than or equal to the input rating of the water heater The Discharge Line e Must not be smaller than the pipe size of the relief valve or have any reducing coupling installed in the discharge line Must not be capped blocked plugged or contain any valve between the relief valve and the end of the discharge line Mustterminate a maximum of 6 inches 152mm above a floor drain or external to the building e Must be capable of withstanding 250 F 121 C without distortion e Must be installed to allow complete drainage of both the valve and discharge line 14 GAS SUPPLY AND PIPING AWARNING Explosion Hazard Use a new AGA or CSA approved gas supply line Install a shut off valve Do not connect a natural gas water heater to a L P gas supply Do not connect a L P gas water heater to a natural gas supply Failure to follow these instructions can result in death explosion or carbon monoxide
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