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/Lineage- <br /> Stockton Maintenance Procedures <br /> Task Step Comment <br /> Pump Going Off-Line <br /> Locate the HOA switch on the recirculatory <br /> control panel for the desired pump,turn From this point the desired pump will be de-energized <br /> the HOA switch to the"OFF"position,tag and shut Down. <br /> Turn Ammonia out switch. <br /> Pump OFF <br /> Visually walk over to specific pump an verify <br /> pressures and condition for normal <br /> operation.Both pumps OFF. <br /> Note: Prior to exercising valves,wipe down valve <br /> Close Suction Valve on Pump and Tag. stem,loosen Gland Packing Nut one-half turn,dress <br /> valve stem with"Orange Solid Oil',exercise valve <br /> zClose Pump Valves stem,tighten Gland Packing Nut <br /> . <br /> Open Vent Line Valve and Tag <br /> Close Discharge Valve on Pump and Tag. <br /> 3 Open Electrical Locate specific PUMP Disconnect Turn OFF <br /> Disconnect and Tag. <br /> Pump Going On-Line <br /> Note: Prior to exercising valves, wipe down valve <br /> Open Suction Valve on Pump. stem,loosen Gland Packing Nut one-half turn,dress <br /> valve stem with"Orange Solid Oil",exercise valve <br /> ? Open Pump Valves stem,tighten Gland Packing Nut <br /> . <br /> Close Valve on Vent Line <br /> Open Discharge Valve on Pump. <br /> 2. Close Electrical Locate specific PUMP Disconnect Take tag <br /> Disconnect OFF and Turn ON. <br /> On the Recirculator control panel select the Note:Ensure at least 1 Evaporator is operational with <br /> 3 Turn Ammonia HOA for the desired Pump and turning it to the liquid feed solenoid active prior to starting pump. <br /> Pump ON the"Auto"position. Verify frost build up on pump housing prior to placing <br /> the pump into auto. <br /> 4. Pump Operation Visually walk over to specific pump an verify Verify the pump is not cavitating,verify pump <br /> pressures and condition are in normal pressure on PSI guage located on the pump discharge <br /> Verification operation. header is at normal operating pressure. <br /> Document k: Ammonia Pump Rotation Procedure Page 3 of 4 <br /> Revision ii: 1.0. <br /> Revision date: 04/26/2021 <br />