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Instruction Manual
RESIDENTIAL GAS WATER HEATERS
POWER VENTED GAS MODELS W/HOT SURFACE IGNITION
NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
A DIVISION OF A. O. SMITH CORPORATION
Ashland City, TN 37015
www.hotwater.com
GAMA certification applies to
all residential gas water
heaters with capacities of 20
to 100 gallons with input rating
of 75,000 BTU/Hr. or less.
C3 Technology® Gas Water Heaters meet the new
ANSI Z21.10.1 standard that deals with the accidental or
unintended ignition of flammable
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SAFE INSTALLATION, USE AND SERVICE Your 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 messages and instructions throughout this manual. It is very important that the meaning of each safety message is understood by you and others who install,
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GENERAL SAFETY 3
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TABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE ............................... 2 FOR YOUR INFORMATION ..................................................... 22 Start Up Conditions ........................................................ 22 GENERAL SAFETY .................................................................. 3 Condensate .................................................................... 22 TABLE OF CONTENTS .............................................................. 4 Smoke
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TYPICAL INSTALLATION GET TO KNOW YOUR WATER HEATER - GAS MODELS A Vent Pipe–Exhaust K Hot Water Outlet V Drip Leg (Sediment Trap) B Vent Terminal L Outlet Receptacle (115 VAC) W Drain Valve C Vent Adapter-Rubber Boot M Temperature-Pressure Relief Valve X Gas Valve-Thermostat D Blower Assembly N Flue Y Drain Pan E Cold Water Inlet O Flue Baffle Assembly** Z Air Intake Screen - Base Pan F Inlet Water Shut-off Valve P Insulation AA Inner Door G Union Q Control Harness BB Outer Door H Inlet Dip Tube
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TYPICAL INSTALLATION MIXING VALVE USAGE FIGURE 2. This appliance has been design certified as complying with American HOTTER WATER CAN SCALD: National Standard/CSA Standard for water heaters and is considered suitable for: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish Water (Potable) Heating and Space Heating: All models are considered suitable for water (potable) heating and space heating. washing
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LOCATING THE NEW WATER HEATER FACTS TO CONSIDER ABOUT THE LOCATION Carefully choose an indoor location 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 appliance. This water heater is not for use in manufactured (mobile) homes or outdoor installation. FIGURE 3. Whether replacing an old water heater or putting the water heater in a new location, the following critical points mus
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and 12" (30.5 cm) from the top. (Standard clearance.) If clearances flammable in many cases, will also react to form corrosive hydrochloric stated on the heater differ from standard clearances, install water heater acid when exposed to the combustion products of the water heater. according to clearances stated on the heater. The results can be hazardous, and also cause product failure. Adequate clearance for servicing this appliance should be considered INSULATION BLANKETS before installation, s
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Chemical vapor corrosion of the flue, blower assembly and vent system 2. When communicating with the outdoors through vertical ducts, each may occur if air for combustion contains certain chemical vapors. opening shall have a minimum free area of 1 square inch per 4,000 2 Spray can propellants, cleaning solvents, refrigerator and air conditioner Btu per hour (5.5 cm /kW) of total input rating of all equipment in the refrigerants, swimming pool chemicals, calcium and sodium chloride, enclosure,
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INSTALLING THE NEW WATER HEATER The water within the water heater tank expands as it is heated and WATER PIPING increases the pressure of the water system. If the relieving point of the water heater’s temperature-pressure relief valve is reached, the valve will relieve the excess pressure. The temperature-pressure relief valve is not intended for the constant relief of thermal expansion. This is an unacceptable condition and must be corrected. It is recommended that any devices installed which
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Figure 10 shows the typical attachment of the water piping to the water The valve must be marked with a maximum set pressure not to exceed heater. The water heater is equipped with 3/4 inch NPT water the marked hydrostatic working pressure of the water heater connections. (150 psi = 1,035 kPa) and a discharge capacity not less than the water heater input rate as shown on the model rating plate. NOTE: If using copper tubing, solder tubing to an adapter before attaching the adapter to the cold w
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When installed at elevations above 7,700 feet (2,347 meters), input GAS PIPING rating should be reduced at the rate of 4 percent for each 1,000 feet (305 meters) above sea level which requires replacement of the burner orifice in accordance with National Fuel Gas Code ANSI Z223.1/ NFPA 54. Contact your local gas supplier for further information. Failure to replace the standard orifice with a high altitude orifice when installed could result in improper and inefficient operation of the applianc
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Never use this water heater unless it is completely full of water. To SEDIMENT TRAPS prevent damage to the tank, the tank must be filled with water. Water must flow from the hot water faucet before turning “ON” gas to the water heater. To fill the water heater with water: 1. Close the water heater drain valve by turning the handle to the right (clockwise). The drain valve is on the lower front of the water heater. 2. Open the cold water supply valve to the water heater. NOTE: The cold water su
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VENT CONNECTIONS TO BLOWER ASSEMBLY VENTING AND INSTALLATION Figure 15 shows the optimal placement of the 2" to 3" or 3" to 4" reducer; Plan the layout of the vent system from the vent termination to the however, the vent can be reduced at any point in the vent system as long water heater considering all of the 90° and 45° elbows plus the as the maximum and minimum vent length requirements are met. number of feet of pipe that would be needed to install the total vent system. The water heater mus
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The unit may be vented horizontally through a wall or vertically through Even the flue gas temperature leaving the blower is between 140°F the roof. Pipe runs must be adequately supported along both vertical (69°C) and 175°F (79°C), some installations will have water condensate in the vent piping. If this occurs, then adequate means of draining and and horizontal runs as follows: disposing of the condensate needs to be made by the installer. • For Schedule 40, 2" PVC, ABS, Coex Cellular Core ve
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For 4" Venting, the maximum equivalent feet of pipe allowed The vent system must terminate so that proper clearances are is 160 feet (48.8 m). This does not include the Vent Termination (supplied maintained as cited in local codes or the current edition of the National locally) for the water heater. For the 4" venting, one 90° elbow is Fuel Gas Code, ANSI Z223.1/NFPA 54, 7.3.4e and 7.8a,b, as follows: approximately equal to 8 feet (2.4 m). One 45° elbow is approximately equal to 4 feet (1.2 m)
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FIGURE 16. This unit can vent through 2", 3" or 4" nonmetallic pipe and fittings. VERTICAL VENT TERMINATION RESTRICTIONS The vent pipe installation can be started from either the blower discharge 1. Minimum of twelve 12" (30.5 cm) above the roof or twelve 12" or the termination wall. Keep in mind the total vent system (pipe and (30.5 cm) above the anticipated snow level. Provide proper support elbows) when installing the vent system, see VENTING AND for all pipe protruding through the roof. IN
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PRIMER VENT PIPE PREPARATION It is recommended that Tetrahydrofuran (THF) be used to prepare the 1. INITIAL PREPARATION surfaces of pipe and fittings for solvent welding. Do not use water, rags, gasoline or any other substitutes for cleaning PVC or CPVC A. Make sure the solvent cement you are planning to use is surfaces. A chemical cleaner such as MEK may be used. designed for the specific application you are attempting. CEMENT B. Know the physical and chemical characteristics and limitations of
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B. Deburring Use a knife, plastic pipe deburring tool, or file to remove burrs from the end of small diameter pipe. Be sure to remove all burrs from around the inside as well as the outside of the pipe. A slight chamfer (bevel) of about 10°- 15° should be added to the end to permit easier insertion of the pipe into the end of the fitting. Failure to chamfer the edge of the pipe may remove cement from the fitting socket, causing the joint to leak. STEP E F. Joint assembly W
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FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES. A. This appliance does not have a pilot. It is equipped with • If you cannot reach your gas supplier, call the fire an ignition device which automatically lights the burner. department. Do NOT try to light the burner by hand
