A.O. Smith FMV-50 manual

Instruction Manual PRINTED 0807 185874-001 KEEP THIS MANUAL IN THE POCKET ON HEA TER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED. FOR USE ONL Y IN MANUF ACTURED HOMES A L L T EC HN IC AL A N D W A RR AN TY Q U E S T I ON S: S HO UL D BE D IR EC TE D T O T H E L O C A L D E A L E R F RO M WH OM T H E W A TE R HE A T E[...]

2 SAFE INST ALLA TION, USE AND SERVICE Y our safety and the safety of others is extremely important in the installation, use and servicing of this water heater . Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard. Read and obey all safety m[...]

3 GENERAL SAFETY[...]

4 SAFE INST ALLA TION, USE AND SERVICE............................2 GENERAL SAFETY..................................................................3 T ABLE OF CONTENTS ............................................................4 INTRODUCTION ......................................................................4 Preparing for the New Installation[...]

5 TYPICAL INST ALLA TIONS GET TO KNOW YOUR W A TER HEA TER - GAS MODELS A V ent Pipe B Drafthood C Anode D Hot W ater Outlet E Outlet F Roof Jack G Gas Supply H Manual Gas Shut-off V alve I Ground Joint Union * INS T AL L IN AC CO RD AN CE WITH LOCAL CODES. * DRIP LEG AS REQUIRED BY LOCAL CODES. FIGURE 1. J Drip Leg (Sediment T rap) K Inner Door L [...]

6 TYPICAL INST ALLA TIONS FIGURE 2. * MIXING V AL VE USAGE This applianc e has been design certied as complying with American Nation al Standar d/CSA Standard for water heate rs and is cons idered suitable for: W a ter (Potable) Heating: All models are considered suitable for water (potable) heating. HOTTER W A TER CAN SCALD: W ater heaters are [...]

7 F ACTS TO CONSIDER ABOUT THE LOCA TION This manufactured home gas-red water heater is for use in a manufactured home. Y ou should carefully choose an indoor locati on for the new water heater , because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the applianc[...]

8 Also, the water heater must be located and/or protected so it is not subject to physical damage by a moving vehicle. This water heater must not be installed directly on carpeting. Carpeting must be protected by metal or wood panel beneath the applia nce extend ing beyon d the full wid th and dept h of the appl iance by at least 3 inches (76.2 mm)[...]

9 SECURING W A TER HEA TER TO FLOOR AND W ALL The water heater must be secured to the oor and to the wall of the enclosure with the three mounting brackets and screws packaged in the carton with the water heater . The two small brackets stamped #01 10064 are used to attach the water heater to the oor and the one large bracket #01 10063 is use[...]

10 The water within the water heater tank expands as it is heated and inc reas es th e pre ssur e of the water system . If the rel iev ing point of the water heater’s tem peratu re-pres sure rel ief valv e is reac hed, the valve will relieve the excess pressure. T he temperature-pressure relief valv e is not inte nded for the cons tant reli ef of[...]

1 1 This heater is provided with a properly certified combina tion temperature - pressure relief valve by the manufacturer . The valve is certied by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief V alves for Hot W ater Supply Syst[...]

12 T o ll the water heater with water: 1 . Cl os e t h e wa te r h e at er d r a in va lv e b y tu rn i n g th e h a n d le to t h e r i gh t ( cl oc k w is e) . T h e dr a i n va l v e is o n th e lo we r fr on t of t h e w at e r h ea t e r . 2. Open the cold water supply valve to the water heater . NOTE: The cold water supply valve must be le[...]

13 Chemical vapor corrosion of the ue and vent system may occur if air for combustion contains certain chemical vapors. Spray can propellants, cleaning solvents, refrigerator and air conditioner refr iger ants , swim ming pool chem icals , cal cium and sodium chlorid e, waxes, bleach and process chemicals are typical compounds which are potentia[...]

14 Connecting the gas piping to the gas control valve of the water heater can be accomplished by either of the two methods shown in Figures 9 and 10. SEDIMENT TRAPS A sediment trap shall be installed as close to the inlet of the water heater as practical at the time of water heater installation. The sediment trap shall be either a tee tting with[...]

15 9. Remove ange nuts holding inner door in place with 3/8” nut driver , see Figure 13. FIGURE 13. 10. Loosen ar e nut “T” holding the rmocoup le to bot tom of gas valve with 3/8” open-end wrench and pull down to remove, see Figure 14. 1 1. Loosen are nut “P” holding pilot line to bottom of gas valve with 7/16” open-end wren[...]

16 23. Place screwdriver in slot “C”, see Figure 19. Depress and turn counterclockwise ( ) to stop. Control screw must be in “IN” position for propane (LP) gas and in “OUT” position for natural gas. STOP! Read label “For Y our Safety” located on your water heater . FIGURE 19. 24. Light pilot following the lighting and operating inst[...]

17 FIGURE 21. 8. Unplug wire from igniter assembly mounted on the side of the gas valve. 9. Remove ange nuts holding inner door in place with 3/8” nut driver , see Figure 22. FIGURE 22. 10. Loosen are nut “T” holding to bottom of gas valve with 3/8” open-end wrench and pull down to remove, see Figure 23. 1 1. Loosen are nut “P”[...]

18 19. Push the propane gas pilot assembly grommet out of the inner door towards the combustion chamber . 20. T o install the natural gas pilot assembly , pull the igniter wire, thermostat lead, and pilot tube through the inner door hole. Reinstall the Phillips-head screw securing the TCO bracket too the burner tube. Reinstall the Phillips- head sc[...]

19 WHITE-RODGERS GAS V AL VE[...]

20 ROBERTSHA W GAS V AL VE[...]

21 INST ALLA TION CHECKLIST BEFORE LIGHTING THE PILOT : 1. Check the gas lines for leaks. a. Use a soapy water solution. DO NOT test for gas leaks using a match or open ame. b. Brush the soapy water solution on all gas pipes, joints and ttings. c. Check for bubbling soap. This means you have leak. T urn “OFF” gas and make the necessary re[...]

22 For the RobertShaw control, turn the water temperature dial counterclockwise ( ) to decrease the temperature, or clockwise ( ) to increase the temperature. Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance. FIGURE 29. ROBERTSHA W TEMPERA TURE ADJUSTMENT DIAL FIGURE 30. T emperatur[...]

23 FOR YOUR INFORMA TION ST ART UP CONDITIONS DRAFT HOOD OPERA TION Check draft hood operation by performing a worst case depressurization of the building. With all doors and windows closed, and with all air handling equipment and exhaust fans operating such as furnaces, clothes dryers, range hoods and bathroom fans, a match ame should still be [...]

24 th e l oc al wat er he at e r su pp l ie r or ser v ic e ag e nc y fo r fu r th er i nf orm a ti on co n ce r ni ng an A no d e R ep la cem e nt K it a nd th is ch l or i na ti on t re at men t . If th e sm el ly wa t er per sis t s af t er the an o de rep lac e me n t an d c hl ori n at i on tre atme nt, we can only sugges t tha t chlo rina tio[...]

25 VENTING SYSTEM INSPECTION At least once a year a vis ual insp ect ion shoul d be made of the vent ing system. Y ou should look for: 1. Obst ru ct ion s whi ch cou ld ca us e impr op er ven ti ng. The co mb us tio n and ventilation air ow must not be obstructed. 2. Damage or deterioration which could cause improper venting or leakage of combus[...]

26 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 . Once the anode is depleted, the tank will start to corrode, eventually developing a leak. Certain wate r cond itio ns wil l caus e a rea ctio n betw e[...]

27 1. Turn the gas control knob to the “OFF” position. 2. CLOSE the cold water inlet valve to the water heater . 3. OPEN a nearby hot water faucet and leave open to allow for draining. 4. Connect a hose to the drain valve and terminate to an adequate drain. 5. OPEN the water heater drain valve to allow for tank draining. NOTE: If the water heat[...]

28 LEAKAGE CHECKPOINTS Read this man ual rst. Then before checking the water heater make sure the gas supply has been turned “OFF”, and never turn the gas “ON” before the tank is completely full of water . A. Water at the draft hood is water vapor which has condensed out of the combustion products. This is caused by a problem in the vent[...]

29 30 & 40 GALLON REP AIR P ARTS LIST Key No. Part Description *1 Burner Assembly (White-Rodgers)** Burner Assembly (RobertShaw)** *2 Burner Head (Natural Gas) Burner Head (Propane Gas) *3 Burner Orice (Natural Gas) Burner Orice (Propane Gas) 4 Burner T ube (White-Rodgers)** Burner T ube (RobertShaw)** *5 Pilot Assembly (Natural Gas) Pilo[...]

30 ROBERTSHA W BURNER ASSEMBL Y 1 WHITE-RODGERS BURNER ASSEMBL Y 1 50 GALLON REP AIR P ARTS LIST Key No. Part Description *1 Burner Assembly (White-Rodgers)** Burner Assembly (RobertShaw)** *2 Burner Head (Natural Gas) Burner Head (Propane Gas) *3 Burner Orice (Natural Gas) Burner Orice (Propane Gas) 4 Burner T ube (White-Rodgers)** Burner T [...]

31 TROUBLESHOOTING GUIDELINES These guidelines should be utilized by a qualied service agent. When calling for service notify the service agent that this is a “Flammable V apor Ignition Resistant” Product. Problem Cause Solution W A TER LEAKS Improperly sealed, hot or cold supply connection, relief valve, drain valve, or thermostat threads. [...]

32[...]