A.O. Smith DB/DW-720-1810 - Manual (Page 32)

32
START-UP AND OPERATING
INSTRUCTIONS
WARNING
After placing boiler into operation, the ignition system safety shutoff
device must be tested by the following test method.
1. Reset Manual High Temperature Safety Limit Control (High
Limit) to the lowest setting. (See figures 3 or 4, pages 5 or 6).
2. Reset System Controller to maximum setting, causing a call
for heat and allowing unit to run until High Limit trips.
3. Reset Manual High Temperature Safety Limit Control to original
temperature setting.
4. Push the reset button, unit should run.
5. Reset system controller to desired temperature.
If unit fails to run, see "TROUBLESHOOTING" section in this
manual.
These units are so constructed that lime removal is simple and
complete, see PREVENTIVE MAINTENANCE.
FIGURE 25
TWO HORIZONTAL TANK INSTALLATION
THREE HORIZONTAL TANK INSTALLATION