A.O. Smith 185237-004 - Manual

6 TYPICAL INSTALLATION GET TO KNOW YOUR WATER HEATER - GAS MODELS A Vent Pipe–Exhaust B Vent Terminal C Vent Adapter-Rubber Boot D Blower Assembly E Cold Water Inlet F Inlet Water Shut-off Valve G Union H Inlet Dip Tube J Anode** K Hot Water Outlet L Outlet Receptacle (115 VAC) M Temperature-Pressur...

7 TYPICAL INSTALLATION FIGURE 2. MIXING VALVE USAGE This appliance has been design certi fi ed as complying with American National Standard/CSA Standard for water heaters and is considered suitable for: Water (Potable) Heating and Space Heating: All models are considered suitable for water (potable)...

8 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 manufactu...

9 and 12" (30.5 cm) from the top. (Standard clearance.) If clearances stated on the heater differ from standard clearances, install water heater according to clearances stated on the heater. Adequate clearance for servicing this appliance should be considered before installation, such as changin...

11 WATER PIPING 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, cleaning and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely t...

12 Figure 10 shows the typical attachment of the water piping to the water heater. The water heater is equipped with 3/4 inch NPT water connections. NOTE: If using copper tubing, solder tubing to an adapter before attaching the adapter to the cold water inlet connection. Do not solder the cold water...

13 GAS PIPING Make sure the gas supplied is the same type listed on the model rating plate. The inlet gas pressure must not exceed 14 inch water column (3.5 kPa) for natural and propane gas (L.P.). The minimum inlet gas pressure shown on the rating plate is that which will permit fi ring at rated in...

14 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 fi tting with a capped nipple in the bottom outlet or other device recognized as an effective sediment trap. I...

16 The unit may be vented horizontally through a wall or vertically through the roof. Pipe runs must be adequately supported along both vertical and horizontal runs as follows: • For Schedule 40, 2" PVC, ABS, Coex Cellular Core vent pipe: Every 3 feet (0.9 m). • For Schedule 40, 3" PVC, ABS,...

22 Due to the nature of the typical gas water heater, the water temperature in certain situations may vary up to 30°F (16.7°C) higher or lower at the point of use such as, bathtubs, showers, sink, etc. It is recommended that lower water temperatures be used to avoid the risk of scalding. It is furth...

23 FOR YOUR INFORMATION START UP CONDITIONS CONDENSATE Whenever the water heater is fi lled 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 condensate. This usually happens when: a. A new water heater is fi lled wit...

24 VENTING SYSTEM INSPECTION At least once a year a visual inspection should be made of the venting system. You should look for: 1. Obstructions which could cause improper venting. The combustion and ventilation air fl ow must not be obstructed. 2. Damage or deterioration which could cause improper ...

25 INSTALLED IN SUITABLE AREA: To insure suf fi cient ventilation and combustion air supply, proper clearances from the water heater must be maintained. See “Locating the New Water Heater” section. Combustible materials such as clothing, cleaning materials, or fl ammable liquids, etc. must not be pl...

26 LEAKAGE CHECKPOINTS Read this manual fi 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. Never use this water heater unless it is completely fi lled with water. To prevent damage to ...

27 Key No. Part Description 1 Burner Assembly 2 Burner Head 3 Burner Ori fi ce 4 Burner Tube 5 HSI Ignition Assembly 6 Inner Door 7 Inner Door Gasket 8 Flue Baf fl e 9 Flue Restrictor 10 Blower Assembly 11 Air Intake Screen - Base Pan 12 Inlet Tube 13 Gas Control Valve 14 Drain Valve 15 Drain Valve ...

28 TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES TROUBLE SHOOTING Please check guidelines below. For your safety, water heater service should be performed only by a quali fi ed service technician. Read the GENERAL SAFETY INFORMATION section fi rst.

30 These guidelines should be utilized by a quali fi ed service agent. When calling for service notify the service agent that this is a “Flammable Vapor Ignition Resistant” Product. TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES Figure 1 and 15. Page 9.

31 THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONLY. If the glass lined tank in this water heater shall prove upon examination by (the warrantor) to have leaked during the warranty period in normal residential use, due to natural corrosion from potable water therein, the warrantor will furnish...