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Compact ASME B-W I & S Manual

1. 1 INSTALLATION e 40 0 4 41 1 4 4 1 Locating The Water Heater 4 442 444 4 5 1 Water Connections 444 4 2 Electrical Connections 4 4 4 7 Amperage 7 Recovery Capacities 8 GENERAL OPERATION 222444 4 8 Thermostat 7 4 4 8 MAINTENANCE 0 3 1 1 9 SERVICING GUIDE 49 2 4 4 4 10 D np 12 GENERAL INFORMATION This electric water heater s design is certified by Underwriters Laboratories UL and listed in accordance with UL 1453 C UL listed in accordance with Canadian National Standard Code 22 2 No 110 M90 This water heater must be installed in accordance with local codes In the absence of local codes install this water heater in accordance with the latest edition of the National Electrical Code 1 The warranty for this water heater is in effect only when the water heater is installed adjusted and operated in accordance with these Installation and Operating Instructions The manufacturer will not be held liable for damage resulting from alteration and or failure to comply with these instructions T
2. The pressure settings for these controls are adjustable These controls are specified for use when the installation has unique pressure requirements that must he safeguarded Therefore before adjusting the pressure values it is recommended that you consult the person responsible for the facility that the water heater is servicing The electrical connections are referenced in the Control Circuit Wiring Diagram and in the pressure control manual provided by the control manufacturer Refer to these instructions when servicing the controls The following unusual situations will give reason for the pressure controls to interrupt the electrical current to the coil of the contactor Upon installation or occasions of re starting heater operation if the inlet supply line is closed i e a shut off valve the high pressure limit may be exceeded due to reasons of thermal expansion of the water e f during the operation of the water heater the inlet line is closed i e a shut off valve a low pressure condition can develop when water is allowed to exit through the outlet connection e f during the operation of the water heater the inlet line is closed i e a shut off valve a low pressure condition can develop when water is removed through the water heater drain valve Low Water Level Control This control will interrupt the electrical current to the contactor coil when a low water level condition is sensed inside the water heater tank Whe
3. the water heater is filled Close the faucets and check for water leaks at the water heater drain valve combination temperature and pressure relief valve and hot and cold water connections 5 Reconnect power supply to water heater TO DRAIN THE HEATER Should it become necessary to completely drain the water heater make sure you follow the steps below 1 Disconnect the power supply to the heater Consult the plumbing professional or electric company in your area for service 2 lose the cold water supply shut off valve 3 Open the drain valve on the water heater by turning the knob counter clockwise The drain valve has threads on the end that will allow connection to a standard hose coupling 4 Open a hot water faucet to allow air to enter the system To refill the water refer to TO FILL THE WATER HEATER Thermostat Adjustment To adjust the water temperature locate the temperature control dial on the right side of the control box To increase the water temperature rotate the temperature control dial clockwise see Figure 5 The thermostat s or temperature control dial has been factory preset to approximately 120 F 49 C DANGER Hotter water increases the risk of scald injury Scalding may occur within five 5 seconds at a temperature setting of 135 F 57 C To protect against hot water injury install an anti scald tempering valve in the water system This valve will reduce point of discharge water temperat
4. CONTACTOR BOX Cry LL DRAIN PAN a Dual Temperature System with Mixing Valve 6A 12A 20A 30A 40A Compact ASME Figure 3A HOT WATER OUTLET STORAGE RETURN LINE TO TANK WATER HEATER ANTI SIPHON DEVICE HOT WATER SUPPLY TO STORAGE TANK COLD WATER SUPPLY FUSE amp CONTACTOR BOX Single Installation with Storage Tank Gravity Circulation 50A 80A 120A Figure 3B HOT WATER d OUTLET STORAGE TANK RETURN LINE TO WATER HEATER HOT WATER SUPPLY a TO STORAGE TANK DEVICE a COLD WATER SUPPLY FUSE amp CONTACTOR BOX Single Installation with Storage Tank Gravity Circulation 6A 12A 20A 30A 40A Compact ASME Figure 4A WATER OUTLET ANTI SIPHON DEVICE COLD WATER SUPPLY _ Dual Water Heater Installation 50A 80A 120A Figure 4B HOT WATER OUTLET ANTI SIPHON DEVICE COLD WATER SUPPLY Dual Water Heater Installation 6A 12A 20A 30A 40A Electrical Connections Before any electrical connections are attempted sure the water heater is full of water and that the manual shut off valve in the cold water supply line is open Heating el
5. Additionally the water heater should be flushed with appropriate dissolvers to eliminate any bacteria IMPORTANT Before proceeding please inspect the water heater and its components for possible damage DO NOT install any damaged components If damage is evident please contact the supplier where the water heater was purchased or the manufacturer listed on the rating plate for replacement parts INSTALLATION Locating The Water Heater Ay WARNING Water heaters are heat producing appliances To avoid damage or injury there shall be no materials stored against the water heater and proper care shall be taken to avoid unnecessary contact especially by children with the water heater UNDER NO CIRCUMSTANCES SHALL FLAMMABLE MATERIALS SUCH AS GASOLINE OR PAINT THINNER BE USED OR STORED IN THE VICINITY OF THE WATER HEATER OR ANY LOCATION FROM WHICH FUMES COULD REACH THE WATER HEATER This water heater MUST NOT be installed in any location where gasoline or flammable vapors are likely to be present unless the installation is such to eliminate the probable ignition of gasoline or flammable vapors Compact ASME IMPORTANT FAILURE TO INSTALL AND MAINTIAIN A NEW LISTED TEMPERATURE AND PRESSURE RELIEF VALVE WILL RELEASE THE The location where this water heater is to be installed is of utmost importance Before installing this water heater consult the installation section of these instructions After reading these installation and operat
6. Certain appliances such as dishwashers and automatic clothes washers may require increased temperature water By setting the thermostat on this water heater to obtain the increased temperature water required by these appliances the potential for scald injury is increased To protect against injury install an anti scald tempering valve in the water system This valve will reduce the point of discharge water temperature by mixing cold and hot water in branch supply lines Anti scald tempering valves can be obtained from your local plumbing supplier Please consult a plumbing professional Compact ASME 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 See instruction manual before setting temperature at water heater Feel water before bathing or showering Temperature limiting valves are available see man al LOCATION ON SIDE OF WATER HEATER TEMPERATURE AN PRESSURE GUAGE Compact ASME Figure 2A 140 F 60 MIXED WATER MIXER VALVE 180 F 83 C WATER ANTI SIPHON DEVICE COLD WATER SUPPLY FUSE amp CONTACTOR BOX DRAIN PAN Dual Temperature System with Mixing Valve 50A 80A 120A Figure 2B 140 F 60 C MIXED WATER 180 F 83 C MIXER VALVE L ANTI SIPHON O DEVICE a COLD WATER SUPPLY FUSE amp
7. Compact ASME INSTALLATION 8 SERVICE MANUAL ASME COMMERCIAL ELECTRIC WATER HEATER THE WARRANTY ON THIS WATER HEATER IS IN EFFECT ONLY WHEN THE WATER HEATER IS INSTALLED AND OPERATED IN ACCORDANCE WITH LOCAL CODES AND THESE INSTRUCTIONS THE MANUFACTURER OF THIS WATER HEATER WILL NOT BE LIABLE FOR ANY DAMAGE RESULTING FROM FAILURE TO COMPLY WITH THESE INSTRUCTIONS READ THESE INSTRUCTIONS THOROUGHLY BEFORE STARTING For safety convenience and best performance we recommend this water heater be installed and serviced by a plumbing professional CONGRATULATIONS You have just purchased one of the finest water heaters on the market today This installation operation and instruction manual will explain in detail the installation and maintenance of your new ASME Commercial Electric Water Heater We strongly recommend that you contact a plumbing professional for the installation of this water heater We require that you carefully read this manual as well as the enclosed warranty and refer to it when questions arise If you have any specific questions concerning your warranty please consult the plumbing professional from whom your water heater was purchased For your records we recommend that you write the model serial number and installation date of your water heater in the notes section in the back of this manual This manual should be kept with water heater TABLE OF CONTENTS GENERAL INFORMATION
8. alve outlet for any reason 5 Monthly drain the heater through the drain valve until the water runs clear to remove silt and sediment Ad WARNING THIS WATER MAY BE HOT 6 A sacrificial anode rod has been installed to extend tank life The anode rod should be inspected periodically every 2 years and replaced when necessary to prolong tank life Water conditions in your area will influence the time interval for inspection and replacement of the anode rod Contact the plumbing professional who installed the water heater or the manufacturer listed on the rating plate for anode replacement information The use of a water softener may increase the speed of anode consumption More frequent inspection of the anode is needed when using softened or phosphate treated water 7 If this water heater is equipped with fuses before removing any fuse disconnect all the power to the water heater Open the control box door and replace fuses according to the size indicated on the wiring diagram affixed to the inside of the control box door A CAUTION FOR YOUR SAFETY DO NOT ATTEMPT TO REPAIR THERMOSTAT S HEATING ELEMENTS OR ELECTRICAL WIRING REFER SUCH REPAIRS TO A QUALIFIED SERVICE TECHNICIAN Contact your local plumbing supplier or plumbing professional for replacement parts or contact the company at the address displayed the rating plate of the water heater Compact ASME SERVICING GUIDE This Servicing Guide section of this Insta
9. ature and pressure relief valve and the discharge line can occur The discharge opening must not subjected to blockage or freezing DO NOT thread plug or cap the discharge line It is recommended that a minimum of four 4 in 10 2 cm be provided on the side of the water heater for servicing and maintenance of the combination temperature and pressure relief valve Do not place a valve between the combination temperature and pressure relief valve and the tank WARNING Hydrogen gas can be produced the hot water system served by this water heater when there has been no usage for a long period of time generally two weeks or more Hydrogen gas is extremely flammable Therefore to reduce the risk of injury under these conditions it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system If hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow There should be no smoking or open flame near the faucet at the time it is open CAUTION INCREASING THE THERMOSTAT SETTING ABOVE THE PRESET TEMPERATURE MAY CAUSE SEVERE BURNS AND CONSUME EXCESSIVE ENERGY HOTTER WATER INCREASES THE RISK OF SCALD INJURY This water heater can deliver scalding temperature water at any faucet in the system Be careful whenever using hot water to avoid scalding injury
10. cer will be activated approximately 20 seconds later and third contactor will be activated in another 20 seconds 11 Compact ASME thereby staging the three contactors over the 40 second time period The staging occurs in a similar manner for applications having more than three contactors FITTING WITH ARROW Refer to the Control Circuit Wiring Diagram for the specific application being serviced Note On the occasion of servicing the water heater where frequent restarts in a short time interval are encountered i e on off on etc the timing sequences will not begin until the sequencers have experienced a time interval fo reset Electrical Door Lock An electrical door lock is offered in order 10 secure the access 10 the water heater control cabinet This device will lock the control cabinet door when the 120 VAC control circuit voltage is applied to it Note once the door is opened the heater can be re energized if necessary for service diagnosis Power Circuit Description The Power Circuit Wiring Diagram illustrates the electrical connections from the incoming power supply through the circuit to the electrical elements The power circuits are available with internal circuit fusing and without internal circuit fusing Refer to the water heater power circuit wiring diagram attached to the inside panel of the control cabinet for the specific connections of the heater being serviced The power circuit components and supp
11. ements which have been energized for a very short period of time can be damaged burned out if they are not completely immersed in water The warranty does not cover burned out heating elements Check the rating plate and wiring diagram before proceeding This electric water heater was manufactured and wired in accordance with Underwriters Laboratories testing approval requirements The temperature limiting device is of the manual reset trip free type and has been factory installed fo interrupt all ungrounded power supply conductors in the event of thermostat failure The plumbing supplier in your area ordered this water heater wired at the factory to comply with existing area codes but local utility codes may require or allow other circuitry Consult your local power company to determine the correct electrical hook up in order to meet local utility and building codes and in order to obtain the most economical rates All electrical connections to elements thermostats contactors fuses certain models and transformers have been made at the factory DO NOT alter any of the internal wiring Wiring connections may loosen during shipment Check all connections for tightness To make the wiring connections to a power supply follow the steps below A Open the cover door of the control box B Bring the power leads from an adequately fused disconnect switch not furnished with the water heater due to varying state and local codes and conned to the
12. er level control is not specified then the alarm will not recognize a low water level condition Referring the Control Circuit Wiring Diagram observe the horn relay that is employed to correctly apply the horn to the control circuit The following unusual situations will give reason for the alarm to sound e f a High Pressure Control is installed upon installation of the water heater or occasions of re starting water heater operation if the inlet supply line is closed i e a shut off valve the high pressure may be exceeded due to reasons of thermal expansion of the water If a Low Pressure Control is installed and if during the operation of the water heater the inlet line is closed i e a shut off valve a low pressure condition can develop when water is allowed to exit through the outlet connection If a Low Pressure Control is installed and if during the operation of the water heater the inlet line is closed i e a shut off valve a low pressure condition can develop when water is removed through the water heater drain valve Heating Element Sequencers Heating element sequencers are available in order to stage the activation of the heating elements thereby reducing the inrush current to the water heater The sequencers will control one or two contactor coils depending upon the heater voltage phase and kW One contactor will be energized immediately when there is heating demand the second contactor controlled with sequen
13. his water heater has been designed and certified for the purpose of heating potable water The installation and use of this water heater for any purpose other than the heating of potable water may cause damage to the water heater and create a hazardous condition and nullify the warranty Ay CAUTION Incorrect operation of this appliance may create a hazard to life and property and will nullify the warranty DO NOT use this appliance if any part has been submerged in water The plumbing professional responsible for the installation of this water heater should be contacted to inspect the appliance and to replace any part of the control system including thermostat s which has been submerged in water Make sure that the rating plate on the water heater is referenced so that the correct voltage is being supplied to the water heater Ay DANGER Do not store or use gasoline or other flammable combustible or corrosive vapors and liquids in the vicinity of this water heater or any other appliance A sacrificial anode s is used to extend tank life Removal of any anode for any reason will nullify the warranty In areas where water is unusually active or odor may occur at the hot water faucet due to a reaction between the sacrificial anode and impurities in the water If this should happen an alternative anode s may be purchased from the supplier that installed this water heater This will minimize the odor while protecting the tank
14. ing instructions select a location for the water heater where the floor is level and is easily accessible to a power supply and water connections It is recommended that the water heater be located near the center of greatest hot water usage to prevent heat loss through the pipes DO NOT locate the water heater where water lines could be subjected to freezing temperatures Locate the water heater so that access panels drain valves and clean out openings are accessible Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors Examples of some typical compounds that are potentially corrosive are spray can propellants cleansing solvents refrigerator and air conditioning refrigerants swimming pool chemicals calcium or sodium chloride waxes and process chemicals These materials are corrosive at very low concentration levels with little or no odor to reveal their presence NOTE DAMAGE TO THE WATER HEATER CAUSED BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY THE WARRANTY DO NOT OPERATE THE WATER HEATER IF EXPOSURE HAS OR WILL OCCUR DO NOT STORE ANY POTENTIALLY CORROSIVE COMPOUNDS IN THE VICINITY OF THE WATER HEATER This water heater must be located in an area where leakage from the tank water line connections and the combination temperature and pressure relief valve will not result in damage to the area adjacent 10 the water heater or to lower floors of the structure When such l
15. ing to comply with Underwriters Laboratories requirements Compact ASME Recovery Capacities Laer we er wer ur 27 310 372 465 558 837 186 207 248 671 558 266 319 479 419 372 335 Multiply kW input by 3 412 to determine Btu hr input Example 54kW x 3412 184 248 Btu s Recovery Computation Formula watts x 3 412 8 25 x Temp Rise GENERAL OPERATION Before closing the switch to allow electric current to flow to the water heater make certain that the water heater is full of water and that the cold water inlet valve is open Complete failure of the heating elements will result if they are not totally immersed in water at all times When the switch is closed the operation of this electric water heater is automatic The temperature control knob located on the side on the control box is factory preset to 120 49 C Care must be taken whenever using hot water to avoid scalding injury Certain appliances require high temperature hot water such as dishwashers and automatic clothes washers CAUTION Scalding may occur within five 5 seconds at a temperature setting of 135 F 57 C TO FILL THE WATER HEATER l Close the water heater drain valve by turning the knob clockwise 2 Open the cold water supply shut off valve 3 Open several hot water faucets to allow air to escape from the system 4 When a steady stream of water flows from the faucets
16. llation and Operation Installation manual is provided for the purpose of improving the effectiveness and the efficiency of servicing this water heater This information is intended to assist qualified service personnel Servicing of this water heater may require knowledge of electrical testing instruments If you are unfamiliar or unsure of the electrical circuits testing instruments consult a qualified electrician This section of these Installation and Operation Instructions is not intended for use as a troubleshooting guide For troubleshooting instructions please contact the supplier from whom this water heater was purchased or the manufacturer listed on the rating plate This water heater has two distinct electrical systems One system connects the electrical power to the heating elements while the other system controls the water heater operation The electrical contactors interconnect these two systems In order to clearly illustrate the electrical circuits two wiring diagrams are provided These diagrams are labeled as the Power Circuit Wiring Diagram and the Control Circuit Wiring Diagram and they are attached fo the surface of the panels inside the water heater control cabinet Control Circuit Description This description will explain certain aspects of the control circuit The control circuit operates with 120 VAC electrical service This voltage is provided by the multi tap transformer which has the primary coil connected to
17. n at the minimum periodic intervals suggested below In some installations the maintenance interval may be more frequent depending on the amount of use and the operating condition of the water heater Regular inspection and maintenance of the water heater will help to ensure safe and reliable operation Compact ASME 1 Annually check the operation of the thermostat s 2 Bi annually check the seal around the heating elements for leaks If there is any sign of leaking disconnect the power supply to the water heater and contact the plumbing professional that installed this water heater or a qualified service technician 3 At least once a year check the combination temperature and pressure relief valve to ensure that the valve has not become encrusted with lime Lift the lever at the top of the temperature and pressure relief valve several times until the valve seats properly without leaking and perates freely WARNING When lifting the lever of temperature and pressure relief valve hot water will be released under pressure Be certain that any released water does not result in bodily injury or property damage 4 Ifthe combination temperature and pressure relief valve on the appliance 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 combination temperature and pressure relief v
18. n the low water level condition is corrected the control will automatically sense the new situation and electrical current will again energize the contactor coil and normal water heater operation will be resumed To remove the low water level control from the tank you must first loosen the control by un threading it from the tank fitting and then rotating the control until the arrow printed on the side of the hex fitting is pointing downward Refer to Figure 6 for clarification This will enable the float orientation 10 align itself with the opening in the tank fitting Figure 6 When installing the control refer to the direction of the arrow on the hex and ensure that it is pointing upwards If it is not pointing upward the control switch will not activate when the tank is refilled with water Refer to Figure 7 for darification Figure 7 Alarm Horn The Alarm Horn is an option specified when the installation desires an audible signal to immediately sound an alert when the water heater operation is interrupted for certain faults Referring to the control circuit wiring diagram the alarm will activate when any one of the following events occur The Hi Limit Control has been tripped The High Water Pressure Control senses excessive pressure The Low Water Pressure Control senses insufficient pressure The Low Water Level Control senses an insufficient quantity of water The alarm will sound only for the options specified i e if a low wat
19. ocations cannot he avoided a suitable drain pan must be installed under the water heater The drain pan must be no greater than 1 7 in 3 8 cm deep and have a minimum length and width of at least 4 in 10 2 cm measured from the jacket of the water heater The drain pan as described above can be purchased from your plumbing professional The drain pan must be piped to an adequate drain The piping must be pitched for proper drainage Water Connections Note Before proceeding with the installation close the main water supply valve After shutting the main water supply valve open a faucet fo relieve the water line pressure in order to prevent water from leaking out of the pipes while making the water connections to the water heater After the pressure has been relieved close the faucet The cold water inlet line connects to the inlet nipple at the base of the water heater The hot water outlet line connects to the nipple on top of the water heater The fittings at the cold water inlet and hot water outlet are dielectric waterway fittings with tapered male threads Make the proper plumbing connections between the water heater and the plumbing system in the structure Install a manual shut off valve in the cold water supply line A CAUTION If sweat fittings are to be used DO NOT apply heat to the nipples on top of the water heater Sweat the tubing to the adapter before fitting the adapter to the water heater connections It is imperati
20. orting information that appear on the wiring diagram include the following Field wiring connection via terminal block or other connection point Fuse block with amperage rating displayed when provided Contactors with amperage ratings displayed Electrical elements with voltage and wattage ratings displayed Water heater total amperage draw is displayed Compact ASME Notes 12 Printed in USA
21. terials as meeting the Requirements for Relief Valves and Automatic Gas Shut off Devices for Hot Water Supply Systems ANSI 721 22 and the Standard CAN1 4 4 Temperature Pressure Temperature and Pressure Relief Valves and Vacuum Relief Valves The combination temperature and pressure relief valve shall be marked with a maximum set pressure not to exceed the maximum working pressure of the water heater The combination temperature and pressure relief valve shall also have an hourly rated temperature steam Btu hr discharge capacity not less than the hourly input rating of the water heater Install the combination temperature and pressure relief valve into the opening on the water heater which is provided for this purpose Note Some models may already be equipped or supplied with a combination temperature and pressure relief valve Verify that this combination temperature and pressure relief valve complies with local codes If the combination temperature and pressure relief valve does not comply with local codes replace it with one that does Follow the installation instructions provided on this page Install a discharge line so that water discharged from the combination temperature and pressure relief valve will exit within six 6 inches 15 3 cm above or any distance below the structural floor and at a location where discharges cannot contact any live electrical part This discharge line is to be installed for complete drainage of both the temper
22. terminal block Local ordinances and or utility company may require an increase in the gauge size of the wiring for conditions where long wiring lengths exist Compact ASME C This water heater must be properly grounded A ground lug is provided within the electrical control box for connection to a properly sized ground See wiring diagram for minimum required ground size The wiring diagram is located on the inside door of the control box D Close the cover door of the control box Heating Elements To replace heating elements disconnect power to the water heater drain tank and replace element To remove a heating element use a screw type element wrench 1 V or 2 3 8 available from most supply houses DO NOT over tighten the new element as this will cause distortion in the new element gasket Once the element has been replaced follow the instructions Fill The Water Heater It is imperative that the water heater is full before power is restored to the heating elements Amperage Chart 208V 240V 13 2 3 5 5 63 7 0 13 5 1 0 6 1 1 125 150 188 225 1 1 50 56 63 13 125 150 _54 260 150 225 30 3 14 22 12 29 13 5 32 15 36 18 3 24 8 27 65 30 72 3 87 4 08 54 30 81 95 1 10 ij 29 43 58 65 72 87 115 130 144 173 216 260 338 162 293 Water heaters with amperage draw of 120 AMPS or more require factory installed internal fus
23. the field wiring that is serving the water heater The Transformer the Water Heater Thermostat the Hi Limit Temperature Control and the Contactor Coil are always included in the Control Circuit Referring to the Control Circuit Wiring Diagram the contactor coil is energized when the Thermostat senses a need for heating Electrical current to the contactor coil will be interrupted when the water temperature is sufficient to satisfy the temperature limits of the either the Thermostat or the Hi Limit Control The Hi Limit Control is provided with manual reset buttons Certain other control components are available as Optional When these optional components are installed with the water heater the control circuit wiring diagram accordingly will include these components The optional equipment available from the manufacturer includes the following High Water Pressure Switch Low Water Pressure Switch Low Water Level Switch Alarm Horn Heating Element Sequencers Electrical Door Lock EX FITTING WITH ARROW Optional Components High and Low Water Pressure Controls These controls interrupt the electrical current to the contactor coil when the pressure settings are exceeded The operation and setting of these controls are described in the manual provided by the control manufacturer This manual is included with the water heater Installation and Operating Instruction manual provided by the manufacturer
24. ures by mixing cold and hot water in branch water lines A licensed plumbing professional or local plumbing authority should be consulted Note This water heater is equipped with an energy cut out device to prevent overheating Should overheating occur turn off the electrical supply to the water heater and contact a qualified service technician Figure 5 APPROX 60 C APPROX 71 C APPROX 38 C APPROX 83 C MAINTENANCE IMPORTANT The water heater should inspected at a minimum of annually by a qualified service technician for damaged components DO NOT operate this water heater if any part is found damaged Shut off the electric power whenever the water supply to the water heater is off Shut off the electric power and water supply drain the heater completely to prevent freezing whenever the building is left unoccupied during the cold weather months In order to ensure efficient operation and long tank life drain the water heater at least once month through the drain valve until the water runs clear Failure to do this may result in noisy operation and lime and sediment build up in the bottom of the tank Check the temperature and pressure relief valve to ensure that the valve has not become encrusted with lime Lift the lever at the top of the valve several times until the valve seats properly without leaking and operates freely The following maintenance should be performed by qualified service technincia
25. ve that heat is not applied to the nipples containing a plastic liner MANUFACTURER FROM ANY CLAIM WHICH MIGHT RESULT FROM EXCESSIVE TEMPERATURE AND PRESSURES This water heater may be provided with an optional pressure and temperature gauge See Figure 1 for proper installation If this water heater is installed in a closed water supply system such as one having a back flow preventer in the cold water supply provisions must be made to control thermal expansion DO NOT operate this water heater in a closed system without provision for controlling thermal expansion Contact your water supplier or local plumbing inspector regarding how thermal expansion can be controlled After installation of the water lines open the main water supply valve and fill the water heater While the water heater is filling open several hot water faucets to allow air to escape from the water system When a steady stream of water flows through those faucets close them and inspect all water connections for possible leaks NEVER OPERATE THE WATER HEATER WITHOUT FIRST BEING CERTAIN IT IS COMPLETELY FILLED WITH WATER Ay WARNING For protection against excessive temperatures and pressure install temperature and pressure protective equipment required by local codes but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or ma

Compact ASME B-W I & S Manual

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Compact ASME B-W I &amp; S Manual

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Compact ASME B-W I & S Manual