A.O. Smith BTF-75 - Manual

5 The heater is design certified by the Canadian Standards for installationon combustible flooring in a closet having minimum clearances fromcombustible material of: 2" clearance from sides and rear, 6" from thefront and 24" from the top. (Standard clearance.) If clearances statedon the ...

6 CLOSED WATER SYSTEM A closed system will exist if a back-flow preventer (check valve),pressure reducing valve, or other similar device is installed in the coldwater line between the water heater and the street main (or well).Excessive pressure may develop due to the thermal expansion of heatedwate...

7 5. The vent termination shall not be mounted directly above or within 3 feet horizontally from an oil tank vent or gas meter to avoid potentialfreeze-up from condensation. Plan the vent system layout so that proper clearances are maintainedfrom plumbing and wiring. Vent pipes serving power vented ...

8 PVC Materials should use ASTM D-2564 Grade Cement; CPVC Materialsshould use ASTM F-493 Grade Cement and ABS Materials should useASTM D-2235 Grade Cement. NOTE: 1. For water heaters in locations with high ambient temperatures(above 100°F) and/or insufficient dilution air, it is recommended that CPV...

9 POWER VENT WIRING SCHEMATIC - FIGURE 7 A. Remove two screws that secure side plate on controlbox and remove plate. B. Cut flexible power cord on inside of control box, as closeto inside wall as possible. C. If flexible cord and strain relief are removed, thenopening in box must be covered. D. Remo...

10 INSTALLATION OF VENT SYSTEM, SIDEWALL With the route of the venting system and selection of materials completed,as discussed in section of this manual titled PLANNING THE VENTSYSTEM, the through the wall vent terminal in place and the first sectionof piping, up to first elbow, installed at the bl...

12 G. Cleanup and joint movement Remove all excess cement from around the pipe and fitting with adry cotton rag. This must be done while the cement is still soft. The joint should not be disturbed immediately after the cementingprocedure, and sufficient time should be allowed for proper curingof the...

13 WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. • Immediately call your gas supplier from a neighbor’sphone. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the...

14 PURGING Gas line purging is required with new piping or systems in which air hasentered. CAUTION PURGING SHOULD BE PERFORMED BY PERSONS EXPERIENCED IN THISTYPE OF GAS SERVICE. TO AVOID RISK OF FIRE OR EXPLOSION,PURGE DISCHARGE MUST NOT ENTER CONFINED AREAS OR SPACESWHERE IGNITION CAN OCCUR. THE A...

15 HIGH TEMPERATURE CUT-OFF SWITCH The thermostat has a built-in temperature cut-off switch (TCO), whichwill shut off gas to the burner in case of excessive water temperature.If the TCO functions the valve will flash 4 times and the valve must bereplaced. It is important that a serviceman be called ...

17 NOT ENOUGH OR NO HOT WATER VENT PIPE TOO HOT (ABOVE 170° F) YELLOW FLAME CONDENSATION WATER LEAKS LEAKING T&P VALVE HOT WATER ODORS OR COLOR (Refer to CATHODIC PROTECTION) PROBLEM POSSIBLE MALFUNCTION SERVICE TO BE PERFORMED 1) Blower will not run A ) “ON/OFF” control switch turned offB) Blow...

18 OFF BRITE - DM 1 FLASH 2 FLASHES 3 FLASHES 4 FLASHES 5 FLASHES 6 FLASHES LED STATUS INDICATES CHECK/REPAIR No power to system control. Normal Operation This indication shows whenever the system ispowered, unless some abnormal event has occurred. Setpoint error, internal failure detected. Airflow ...

20 A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater. 1. THE TANKIf the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potablewater therein, during the fir...