Watts AERCO KC Series User Manual page 37

9. Disconnect wire #60 from the air/fuel valve
open position switch. This is the switch
closest to the blower (See Fig. 6.7).
10. Restore AC power to the unit.
11. Start the unit.
WARNING!
THIS IS A 120-VOLT AC COMBUSTION
SAFEGUARD SYSTEM. POWER MUST
BE REMOVED PRIOR TO PERFORMING
WIRE REMOVAL OR OTHER TESTING
PROCEDURES THAT CAN RESULT IN
ELECTRICAL SHOCK.
Figure 6.7
Air/Fuel Valve Open Position Switch Location
12. The unit should shutdown and display the
message "SYSTEM FAULT PURGE
INTERLOCKS".
13. Disconnect AC power from the unit.
14. Reconnect wire #60 to the air/fuel valve
open position switch.
15. Disconnect wire #62 from the ignition
position switch. This is the switch closest to
the burner of the unit (See Fig. 6.7).
16. Restore AC power to the unit, and reset the
combustion safeguard.
17. Start the unit in manual mode.
18. The unit should lockout and display the
message "LOCKOUT START FLAME".
SAFETY DEVICE TESTING
19. Disconnect AC power from the unit.
20. Reconnect wire #62 to the ignition position
switch.
21. Replace the air/fuel valve cover.
22. Restore AC power to the unit.
23. Set the unit to auto mode to resume normal
operation.
6.8 SAFETY PRESSURE RELIEF VALVE
TEST
Test the safety Pressure Relief Valve in
accordance with ASME Boiler and Pressure
Vessel Code, Section VI.
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