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II. 

OPERATION

 

 

The glycol feeder is provided with a control panel with HAND/OFF/AUTO selector 
switch. 
 
When the panel is switched to the AUTO position, the pump is actuated via the pressure 
switch, which is mounted in the discharge assembly and sensing the pressure in the loop.  
The pressure switch is pre-set to start the pump at 12 psi and stop the pump when 30 psi in 
the loop is achieved.  The adjustment range for the standard pressure switch is 10-45 psi to 
start the pump and 20-60 psi to stop the pump.  The minimum differential pressure 
between the cut in and cut out set points is 10 psi and the maximum is 30 psi.  The float 
switch in the bottom of the tank will stop the pump if the glycol solution in the tank gets to 
low level. 
 
The MANUAL position of the selector switch in the panel will allow the pumps to run and 
inactivate both the pressure switch and the level switch. 

 
 
 

PLEASE READ THIS 

 

 
The initial setting of the pressure switch is critical 
to the proper operation of the glycol feeder. 

 

 
 
 

WARNING 

 

 
The pressure relief valve is factory set at 60 psi.  
DO NOT operate the glycol feeder above 100 psi.  
If your application requires a higher operating 
pressure, consult the factory. 

 
 

 
 
 
 

Summary of Contents for G-100-1A

Page 1: ...NEPTUNE GLYCOL FEED SYSTEM Models G 50 1 G 50 1A G 50 2A G 100 1A G 100 2A Lansdale PA 19446 Tel 215 699 8700 Fax 215 699 0370 REV NO 6 01 08 04 ZL106838 OPERATING INSTRUCTION MANUAL...

Page 2: ...pm pump float switch and NEMA 4X control panel The control panel features a HAND OFF AUTO selector switch for the pump motor ON indication light for the pump LOW tank level indication light and power...

Page 3: ...stop the pump The minimum differential pressure between the cut in and cut out set points is 10 psi and the maximum is 30 psi The float switch in the bottom of the tank will stop the pump if the glyc...

Page 4: ...and the other in a clockwise rotation Looking at the front of the Model G XX 2A the control panel facing you the pump motor on the left should be wired counter clockwise and the pump motor on the rig...

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Page 8: ...may be readily inspected in the field usually without removal from the drive or system plumbing Simply remove the cover screws to pull the cover Before attempting an inspection follow safety precauti...

Page 9: ...positioned for easy cleaning access If start up screens are used be sure they are removed prior to placing the system into regular operation Orient lines so as to prevent formation of air pockets Be s...

Page 10: ...ions require no adjustment If the pump s bearing areas or seal area runs hot shut the pump down and determine the cause For units equipped with integral pressure relief valve the factory setting is us...

Page 11: ...inimum friction drag with positive sealing and again should be maintenance free provided the same conditions for mechanical seals are met as well as 6 Avoid scouring of the shaft in the lip seal area...

Page 12: ...ut out 50 psi Differential 20 psi 50 30 psi Range The range is the pressure limits within which the operating points settings can be adjusted The range of the Class 9013 pressure switch is referenced...

Page 13: ...st the operating points 1 Place a flat blade screwdriver in a range adjustment nut slot 2 Rotate the nut to the left to increase the operating points or to the right to decrease the operating set poin...

Page 14: ...Cracking will not occur if the bushing is FIRST tightened into the pipe or tank fitting and THEN the L 30 body is tightened into the bushing Thus 1 Teflon tape thread and tighten plastic bushing into...

Page 15: ...ation and thread gland nut firmly on to cover Fig 1 Wiring schematic for power applied to load when liquid level is less than set point power to load interrupted when level increases to above set poin...

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