Constant circulation of water between the storage tank and the building is permissible as long as the water does not constantly flow through the heater. Only all bronze circulators are used with commercial water heaters. Although circulators are oiled and operated by the manufacturer, THEY MUST BE OILED AGAIN BEFORE OPERATED. Oil the three oil cups (2 on the motor, 1 on the pump) as instructed by manufacturer. See fig. 4. Thereafter, lubricate the three oil cups at least once every 4 months. TYP

HIGH ALTITUDE INSTALLATIONS WARNING INSTALLATIONS ABOVE 2000 FEET REQUIRE REPLACEMENT OF THE BURNER ORIFICE IN ACCORDANCE WITH SECTION 8.1.2 OF THE NATIONAL FUEL GAS CODE (ANSI Z223.1). FOR CANADIAN INSTALLATIONS CONSULT CANADIAN INSTALLATION CODES AND CAN/CGA B149. FAILURE TO REPLACE THE ORIFICES WILL RESULT IN IMPROPER AND INEFFICIENT OPERATION OF THE APPLIANCE RESULTING IN THE PRODUCTION OF INCREASED LEVELS OF CARBON MONOXIDE GAS IN EXCESS OF SAFE LIMITS WHICH COULD RESULT IN SERIOUS PERSONAL

8 Air Requirements ........................................................................... 8-9 Venting ........................................................................................... 9 Relief Valve .................................................................................... 9-10 Hard Water ..................................................................................... 10 Closed Water System .................................................................... 10 Wate

WARNING THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS HEATERS IN ROOMS OR AREAS WHERE GASOLINE, OTHER FLAMMABLE LIQUIDS OR ENGINE DRIVEN EQUIPMENT OR VEHICLES ARE STORED, OPERATED OR REPAIRED. FLAMMABLE VAPORS ARE HEAVY AND TRAVEL ALONG THE FLOOR AND MAY BE IGNITED BY THE IGNITER OR MAIN BURNER FLAMES CAUSING FIRE OR EXPLOSION. SOME LOCAL CODES PERMIT OPERATION OF GAS APPLIANCES IN SUCH AREAS IF THEY ARE INSTALLED 18 INCHES OR MORE ABOVE THE FLOOR. THIS MAY REDUCE THE RISK IF LOCATION