1 this water heater complies with ansi z21.10.1-current edition regarding the accidental or unintended ignition of fl ammable vapors, such as those emitted by gasoline. For your safety an odorant is added to the gas used by this water heater. • safety instructions • installation • operation fvir gas...
2 table of contents water heater safety .............................................................................................................................................................................. 1 safe installation, use and service ...................................................
3 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 water heater to warn you and others of a potential...
4 fire or explosion harzard do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. Avoid all ignition sources if you smell natural or lp gas. Do not expose water heater control to excessive gas pressure. Use only gas shown on rating plate. ...
5 typical installation get to know your water heater - gas models a vent pipe b draft hood c anode (not shown) d hot water outlet e insulation f gas supply piping g manual gas shut-off valve h ground joint union i drip leg (sediment trap) * install in accordance with local codes. * drip leg as requi...
6 installing your gas water heater important information about this water heater this gas water heater was manufactured to voluntary safety standards to reduce the likelihood of a flammable vapor ignition incident. New technology used in meeting these standards makes this product more sensitive to i...
7 location requirements carbon monoxide poisoning hazard warning do not install in a mobile home. Doing so can result in carbon monoxide poisoning and death. The fvir system is designed to reduce the risk of flammable vapor-related fires. The patented system protects your family by trapping the burn...
8 important: the water heater should be located in an area where leakage of the tank or connections will not result in damage to the area adjacent to the water heater or to lower floors of the structure. Due to the normal corrosive action of water, the tank will eventually leak after an extended per...
9 manual gas shut-off valve ground joint union drip leg 3” minimum check with local utility for minimum height 6” maximum air gap figure 3. Gas pressure warning explosion hazard • gas leaks can not always be detected by smell. • gas suppliers recommend that you use a gas detector approved by ul or c...
10 lp gas only warning explosion hazard have a qualified person make sure l.P. Gas pressure does not exceed 13” water column. Examples of a qualified person include: licensed plumbers, authorized gas company personnel, and authorized service personnel. Failure to do so can result in death, explosion...
11 table 3 btuh input minimum square feet with 8’ ceiling typical room with 8’ ceiling 30,000 188 9 x 21 45,000 281 14 x 20 60,000 375 15 x 25 75,000 469 15 x 31 90,000 563 20 x 28 105,000 657 20 x 33 120,000 750 25 x 30 135,000 844 28 x 30 important: • the area must be open and be able to provide t...
12 12” maximum permanent openings to the outside or additional rooms within the building closet or other confined space 12” maximum figure 4. All air from inside the building when additional air is to be provided to the confined area from additional room(s) within the building, the total volume of t...
13 alternative opening location 1 sq. Inch per 3000 btuh confined space all air from outdoors - using a single permanent opening figure 8b. Vent pipe system this water heater uses a non-direct, single-pipe vent system to remove exhaust gases created by the burning of fossil fuels. Air for combustion...
14 align the legs of the draft hood with the slots provided. Insert the legs and secure the draft hood to the water heater’s top with the four screws provided as shown in figure 9. Do not alter the draft hood in any way. If you are replacing an existing water heater, be sure to use the draft hood su...
15 piping installation piping, fittings, and valves should be installed according to the installation drawing (figure 13). If the indoor installation area is subject to freezing temperatures, the water piping must be protected by insulation. The water supply pressure should not exceed 80 psi. If thi...
16 metal drain pan 1 3/4” depth maximum floor drain drain line 3/4” id minimum discharge pipe do not cap or plug temperature and pressure relief valve in a closed system, use a thermal expansion tank cold water supply to fixtures cold water inlet valve (shut-off valve) pressure reducing valve with b...
17 charge line. • must terminate a maximum of six inches above a floor drain or external to the building. In cold climates, it is recommended that the discharge pipe be terminated at an adequate drain inside the building. • must be capable of withstanding 250°f (121°c) without distortion. • must be ...
18 • this water heater is not to be used as a replacement for an existing boiler installation. • do not use with piping that has been treated with chromates, boiler seal or other chemicals and do not add any chemicals to the water heater piping. • if the space heating system requires water temperatu...
19 important information about this water heater this gas water heater was manufactured to voluntary safety standards to reduce the likelihood of a flammable vapor ignition incident. The new technology used in meeting these standards makes this product more sensitive to installation errors. Please r...
20 warning explosion hazard replace view port if glass is missing or damaged. Failure to do so can result in death, explosion or fire. Lighting instructions read and understand these directions thoroughly before attempting to light or re-light the pilot. Make sure the view port is not missing or dam...
21 for your safety read before lighting warning: flammable i f you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. Lighting instructions control knob figure 'a' "off" position figure 'b' "pilot" position figure 'c' "o...
22 water temperature regulation water temperature over 125°f (52°c) can cause servere burns instantly resulting in severe injury or death. Children, the elderly, and the physically or mentally disabled are at highest risk for scald injury. Feel water before bathing or showering. Temperature limiting...
23 water temperature °f time for 1st degree burn (less severe burns) time for permanent burns 2nd & 3rd degree (most severe burns) 110 116 116 122 131 140 149 154 (normal shower temp.) (pain threshold) 35 minutes 1 minute 5 seconds 2 seconds 1 second instantaneous 45 minutes 5 minutes 25 seconds 5 s...
24 4. The ignition of flammable vapors. A thermopile is used to determine if a pilot flame is present, and will shut off the gas supply to the main burner and the pilot if the flame is absent. This unit is also equipped with a thermal switch, designed to shut off the gas supply in the event the heat...
25 the following are typical (but not all) signs of a depleted anode rod: • the majority of the rods diameter is less than 3/8”. • significant sections of the support wire (approx. 1/3 or more of the anode rod’s length) are visible. If the anode rod show signs of either or both it should be replaced...
26 temperature and pressure relief valve discharge line to drain manual relief valve figure 21. 6. Use needle nose pliers to disconnect the white (-) thermopile wire from the gas control valve/thermostat (figure 22). Next, disconnect both red thermal switch wires from the thermal switch on the manif...
27 replacing the pilot/ thermopile assembly 1. Remove the manifold door assembly as described in “removing the manifold/burner assembly” section. 2. Remove the burner to access the pilot/thermopile assembly. Remove and keep the screws securing the burner to the manifold (figure 24). Important: do no...
28 external inspection & cleaning of the base-ring filter 1. At least annually, check the base-ring filter (figure 28) for any dust or debris that may have accumulated on the filter screen. Note: if the water heater is located in an area that is subjected to lint and dirt, it may be necessary to che...
29 7. Connect the white (-) thermopile wire to the gas control valve/thermostat, then connect the red thermal switch wires to the thermal switch on the manifold door. (figure 23). 8. Reconnect the igniter wire (figure 22). 9. Turn on the gas supply to the water heater at the manual gas shut-off valv...
30 fvir system operational checklist 1. Manifold gasket properly sealed. 2. Viewport not damaged or cracked. 3. Flame-arrestor free of debris and undamaged. 4. Manifold component block properly installed. 5. No leaks at pilot and manifold connection. 6. Manifold door screws securely tightened. 7. De...
31 problem possible cause(s) corrective action slow hot water recovery 1. Insufficient combustion air 2. Water heater flue or vent system blocked 3. Low gas pressure 4. Improper calibration 5. Base-ring filter blocked with lint/ dust 6. Fvir flame arrestor blocked with lint/dust. 1. Provide ventilat...
32 pilot light troubleshooting flowchart have you bled all the air from the pilot tube and gas supply line? No while repeatedly depressing the igniter button, push in and hold the gas control/ temperature knob until the pilot is lit and maintains a stable flame (status light will blink). It may take...
33 led status problem corrective action 0 flashes (led not lit) pilot light is not lit or thermopile has not yet reached normal operating temperature. Turn gas control valve/thermostat knob to off. Wait 10 minutes, then attempt to relight pilot by following the lighting instructions on the water hea...
34 status light and diagnostic code troubleshooting chart (continued) led status problem corrective action 4 flashes the gas control valve’s temperature sensor has detected that the water temperature was too high. Once this condition occurs, the main burner and the pilot light will be shut off. Sinc...
35 notes.
36 repair parts illustration 2 5 1 4 6 8 7 9 10 3 when ordering repair parts, always give the following information: 1. Model, serial, and product number 2. Type of gas 3. Item number 4. Parts description legend special anode rod. (see “anode rod / water odor” section.) temperature and pressure reli...
37 listed parts kits and illustrations item 11a: pilot / thermopile assembly kit, which contains the pilot / pilot tube assembly, thermopile, and igniter electrode. (natural gas) item 11b: pilot / thermopile assembly kit, which contains the pilot / pilot tube assembly, thermopile, and igniter electr...
38 this warranty is applicable to the original owner only in accordance with the warranty terms and conditions specifi ed below. The warrantor will furnish the original owner, 1) a replacement water heater of equivalent size and current model if the glass-lined tank in this water heater leaks and, 2...
39 limitation on implied warranties implied warranties, including any warranty of merchantability imposed on the sale of this heater under state law are limited to one year duration for the heater or any of its parts. Some states do not allow limitations on how long an implied warranty lasts, so the...
40 copyright © 2010 a.O. Smith corporation. All rights reserved..
