Bosch Appliances 2400E NG, 2400E LP manual General rules to follow for safe operation, Venting

2.4General rules to follow for safe operation

B 1. You must follow these instructions when you install your heater. In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54.

In Canada: The Installation must conform with CGA B149.(1,2) INSTALLATION CODES and /or local installation codes.

B2. Carefully plan where you install the heater. Correct combustion air supply and vent pipe installation are very important. If not installed correctly, fatal accidents can be caused by lack of air, carbon monoxide poisoning or fire.

B3. When the unit is installed indoors with ROOM SEALED (twin pipe) combustion air and venting, it is permitted to be located in bathrooms, bedrooms and occupied rooms that are normally kept closed. See chapter 3.6. If the unit will be installed indoors and use indoor combustion air, the place where you install the heater must have enough ventilation. The

National Fuel Gas Code and National Fire Codes do not allow UNSEALED gas fired water heater installations in bathrooms, bedrooms or any occupied rooms normally kept closed. See chapter 3.2 and 3.5.

B 4. You must vent your heater. See section on

VENTING.

B5. The appliance and its gas connection must be leak tested before placing the appliance in operation. The appliance must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve (not supplied with heater) during any pressure testing at pressures in excess of ½ Psig (3.5 kPa).

B 6. Keep water heater area clear and free from combustibles and flammable liquids. Do not locate the heater over any material which might burn.

B7. Correct gas pressure is critical for the optimum operation of this heater. Gas piping must be sized to provide the required pressure at the maximum output of the heater, while all the other gas appliances are in operation. Check with your local gas supplier and see Chapter 3.7 Gas piping and connections.

B8. Should overheating occur or the gas supply fail to shut off, turn off the gas supply at the manual gas shut off valve, on the gas line. Note: manual gas shutoff valve is not supplied with the heater.

B9. Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater.

B 10. Failure to install heater correctly may lead to unsafe operation and void the warranty.

B11. The heater must not be installed in an unheated area where temperatures will reach 36°F or lower. If the heater is left in an area susceptible to such temperatures, refer to Section 5.4 on Winterizing.

B12. In areas where water supply has a high mineral content, a water softener is strongly recommended. Damage to the water heater resulting from hard water/scale deposits will not be covered under war- ranty.

B13. In areas with warm inlet water (70°F or greater), increasing flow rate at low flowing fixtures may be required to prevent outlet temperatures from exceeding the desired temperature set point.