A.O. Smith FMD 50 Temperature Regulation, For Your Information, Start UP Conditions, Condensate

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TEMPERATURE REGULATION

Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 30°F (16.7°C). If you experience this type of use you should consider using lower temperature settings to reduce scald hazards.

HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the infirm, or physically/ mentally handicapped. If anyone using hot water in your home fits into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satisfies your hot water needs, a means such as a mixing valve should be used at the hot water taps used by these people or at the water heater. Mixing valves are available at plumbing supply or hardware stores, see Figure

2.Follow manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual, see Figures 35 and 36.

Never allow small children to use a hot water tap, or to draw their own bath water. Never leave a child or handicapped person unattended in a bathtub or shower.

NOTE: A water temperature range of 120°F-140°F (49°C-60°C) is recommended by most dishwasher manufacturers.

The thermostat of this water heater has been factory set at its lowest position. It is adjustable and must be reset to the desired temperature setting to reduce the risk of scald injury. The mark ( ) indicative of approximately 120°F (49°C) is preferred starting point. Some Provinces may have a requirement for a lower setting.

Turn the water temperature dial clockwise ( ) to decrease

the temperature, or counterclockwise ( ) 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 35.

Temperature

Time to Produce 2nd & 3rd

Settings

Degree Burns on Adult Skin

VERY HOT= approx.160°F (71°C)

About 1/2 second

C = approx. 150°F (66°C)

About 1-1/2 seconds

B = approx. 140°F (60°C)

Less than 5 seconds

A = approx. 130°F (54°C)

About 30 seconds

= approx. 120°F (49°C)

More than 5 minutes

Lowest

- - - - - - - - - - - - - - - -

Setting = approx. 80°F (27°C)

FIGURE 36.

FOR YOUR INFORMATION

START UP CONDITIONS

CONDENSATE

Whenever the water heater is filled with cold water, some condensate will form while the burner is on. A water heater may appear to be leaking when in fact the water is condensation. This usually happens when:

a.A new water heater is filled with cold water for the first time.

b.Burning gas produces water vapor in water heaters, particularly high efficiency models where flue temperatures are lower.

c.Large amounts of hot water are used in a short time and the refill water in the tank is very cold.

Moisture from the products of combustion condense on the cooler

tank surfaces and form drops of water which may fall onto the burner or other hot surfaces to produce a “sizzling” or “frying” noise.

Excessive condensation can cause pilot outage due to water running down the flue tube onto the main burner and putting out the pilot.

Because of the suddenness and amount of water, condensation water may be diagnosed as a “tank leak”. After the water in the tank warms up (about 1-2 hours), the condition should disappear.

Do not assume the water heater is leaking until there has been enough time for the water in the tank to warm up.

An undersized water heater will cause more condensation. The water heater must be sized properly to meet the family’s demands for hot water including dishwashers, washing machines and shower heads.

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Contents For USE only in Manufactured Homes Residential Direct Vent GAS Water HeatersImportant Definitions Safe INSTALLATION, USE and ServiceGeneral Safety Introduction Table of ContentsThermostat Shield Optional Typical InstallationHotter Water can Scald Facts to Consider about the Location Locating the NEW Water HeaterInsulation Blankets Water Heater Installation Installing the NEW Water HeaterBasement or crawl space Securing Water Heater to Floor and WallRoof Jack Installation ALL Models ALL 50 Gallon 189.27 Liter ModelsHRS Movement Complete Joint SETValve and Pipe Insulation Water PipingTEMPERATURE-PRESSURE Relief Valve GAS Piping Filling the Water HeaterFor 30 Gallon Heater Sediment TrapsFor 40 Gallon Heater For 50 Gallon HeaterPage For 30 Gallon Heater Page For Your Information Temperature RegulationStart UP Conditions CondensateOperational Conditions Burner Cleaning Periodic MaintenanceVenting System Inspection Burner InspectionDraining Anode ROD InspectionWater system. Check for any leaks Immediately correct any if foundDrain Valve Washer Replacement ServiceLeakage Checkpoints Troubleshooting Guidelines Metal Drain PAN Thermostat Shield Manifold Assembly Repair Parts ListPage Page UNE NON ET Rechange DE Pièces DE Liste UNE EST Ceci Rechange DE Pièces DES ListeSuie DE Formation Dépannage DE DirectivesFuites DE Vérification DE Points LA DE Rondelle LA DE RemplacementVidange DE Soupape Trop PAS’ANODE Tige LA DE Inspection Entretien Périodique EntretienBrûleur DU Inspection Brûleur DU Nettoyage .37 FigureFonctionnement DE Conditions Température LA DE Régulation Information Votre PourDémarrage DE Conditions CondensationMort la ou corporelles blessures des matériels ’APPAREIL Vers GAZ LE CouperGallons 50 DE EAU-CHAUFFE UN Pour Naturel GAZ AU .L.P Propane GAZ DUGallons 40 DE EAU-CHAUFFE UN Pour EAU-CHAUFFE Gallons 30 PourCe jusqu’à 19 à 9 étapes les30 Figure Voir basse, plus la position sa à Droite la vers tournéModèle DU Signalétique Plaque LA SUR Listé Celui QUE Sédiments À TrappesGallons 30 DE EAU-CHAUFFE UN Pour GAZ DE Conduite Remplacement le requiert Ceci .supplémentaire pieds 000 1 mEAU-CHAUFFE LE Remplir Et eau,-chauffe le dessert qui gaz en d’alimentationPression DE ET Température DE Décharge DE Soupape ’EAU Canalisation DE Réseau PrudenceTuyaux DES Isolation ET P & T DE Soupape Potable non d’eau système un à pas connectez NeComplet Joint DU Tableau JEU Mouvement DE Joints DES Pour Approximatif Prise DE TempsRaccords LES ET Cpvc OU ABS PVC, Tuyau LE Cimenter Gallons 50 Litres 189,27 Modèles LES Tous Modèles LES TousPente en toit un sur utilisation Cheminée DE Trémie LA DE InstallationMUR AU ET Plancher AU EAU-CHAUFFE LE Fixer EAU-CHAUFFE DU Installation EAU-CHAUFFE Nouveau LE InstallerBlankets Insulation De l’air blessures, des éviter PourDétectée est fuite la lorsque ’EMPLACEMENT DE Sujet AU Considérer À Faits EAU-CHAUFFE Nouveau DU L’EMPLACEMENT Choisir» eau-chauffe nouveau le Installer « section la dans Respectés être doiventÉbouillanter Peut Chaude Plus L’EAU DE Typique InstallationGAZ AU Modèles EAU-CHAUFFE Votre Connaissez Matières DES Table ’INSTALLATION Pour Préparer SEGénérale Sécurité Importantes Définitions Entretien ET Utilisation .SÉCURITAIRE Installation000-15795 Pièce DE .NO Unis-États AUX Imprimé EAU-CHAUFFE LE SUREAU-CHAUFFE CE PAR Utilisé GAZ AU Ajouté EST Odorisant UN

FMD 40, FMD 50, 315795-000 MH, FMD 30 specifications

A.O. Smith is a renowned brand in the field of water heating solutions, offering a range of efficient and durable water heaters tailored to meet diverse consumer needs. Among its extensive lineup, the A.O. Smith FMD series showcases several commendable models, including the FMD 30, FMD 40, and FMD 50, each boasting unique features and advanced technologies.

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