flue gas temperature °C 70 50 75 75 50 50 Flue gas discharge kg/h 56.8 61.1 85.4 101.4 141.9 164.3 Gas data butane 3+ (G30) Input* kW 30.7 32.8 50.6 59.4 -- Output kW 29.8 31.8 48.1 57.4 -- Inlet pressure mbar 30 30 30 30 -- Burner pressure mbar 30 30 30 30 -- Gas consumption** kg/h 2.2 2.4 3.7 4.3 -- Diameter main orifice mm 2.50 2.60 3.40 3.80 -- Max. flue gas temperature °C 70 50 75 75 -- Flue gas discharge kg/h 60.0 62.2 86.0 101.9 -- Gas data propane 3+ (G31) Input* kW 29.0 30.9 50.3 59.1 8

Smith Water Heaters June 2GG7R щщщщщ Electric Water Heaters Energy Saver MANUFACTURED HOUSING MODEL NUMBER FIRST HOUR RATING GALLONS ENERGY FACTOR GALLON CAPACITY STD. VOLTAGE/WATTAGE RECOVERY 90°F RISE GALLONS R VALUE DIMENSIONS IN INCHES APPROX. SHIPPING WEIGHT (LBS) A B C ESM-20 - - 19.9 120V, 16S0 Watts B 12 34 26-1/2 17 76 ESM-30 43 .93 30 240V, 3B00 Watts 17 16 37-1/2 2B-1/4 20-1/2 90 ESM-40 51 .93 40 240V, 3B00 Watts 17 16 46 3B-1/4 20-1/2 115 ESM-SO 58 .9S SO 240V,

Failure to follow all guides and rules could cause personal injury or property damage. • Check with your state and/or local public works department for plumbing codes. You must follow their guides as you install the Water Heater. NOTE: Failure to comply with these installation instructions will void the product warranty, and the installer will be responsible for any service, repair or damages caused thereby. BEFORE BEGINNING INSTALLATION Read these instructions completely and carefully. • I

O. Smith’s complete line of tankless gas water heaters A. O. Smith On-Demand Gas Water Heaters Each A. O. Smith on-demand water heater is designed for a specific application. Consult your sales representative or contact A. O. Smith for specifications and recommendations on which model is right for specific requirements. BTU Input Approximate Model Natural / Propane Hot Water Output (GPM) Shipping Number Minimum Maximum Maximum 45. F Rise 77. F Rise Weight (lbs) INDOOR MODELS ATI-305N 15,000 199,

Priority Indicator Indicates that this controller is setting the temperature Priority Button Priority can be changed to another controller if desired On/Off Button Will turn the water heater on/off Temperature Display Shows the temp setting Error Codes When a fault is detected an error code flashes at the temperature setting Thermostat Increases/decreases temp setting In Use Indicator Light Indicates hot water is being supplied (a tap is open) A. O. Smith On-Demand Gas Water Heaters Endless Hot

To simplify the process, use this map to determine whether your installation location is in the Southern Zone, Central Zone or Northern Zone. Average Ground Water Temperatures SOUTHERN ZONE A v er age Ground W ater T emper atur e: 62°F to 77°F CENTRAL ZONE A v er age Ground W a ter T emper atur e: 52°F to 61°F NORTHERN ZONE A v er age Ground W a ter T e mper atur e: 37°F to 51°F Remote Controller All models come with a Remote controller that can set the temperature within a specific range. Prior

SMITH WATER PRODUCTS CO., INC. 5621 W. 115TH STREET • ALSIP, ILLINOIS 60803 PHONE: 1-800-433-2545 • FAX: 1-800-433-2515 website: • email: parts@hotwater.com