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Konus Burners, Primary, and Vat Pumps

NO2 Manual Valve

During normal operation this valve is open. This permits the oil that
exhausts out of the “AB” port of the No. 3WV valve to flow back into
the Konus burner. Closing this valve isolates the 3WV valve to the
Konus burners.

NO3 Manual Valve

This valve is located near the ponds heat exchanger. During the
normal mode of operation the valve is open permitting oil flow out of
the heat exchanger to the No.2WV and 3WV air operated valves.
The NO3 valve should be closed anytime it is necessary to isolate the
heat exchanger.

NO4 Manual Valve

This valve is normally open which allows oil flow from the vat pump
into the heat exchanger. The valve is located near the heat
exchanger. Closing the valve isolates flow from the vat pump to the
heat exchanger.

OV Outlet Valve

During normal operation, the outlet valve is in the open position. This
permits oil flow from the VP1 vat pump to be directed to the heat
exchanger in the ponds. Please refer to the “Isolation and Change
Out Procedure” for the sequence of opening and closing these valves
when changing the pump.

Troubleshooting Thermal Oil Systems Page 11