Pump Solutions Group Neptune Series 500 MODEL 481 THRU 547 - Manual (Page 27)

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APPENDIX
Addendum to Operating and Instruction Manual for the 500 dia-pump and 500-A dia-pump
This sheet describes the differences in liquid head design of the Series 500-E-AR “dia-pump”. This sheet is intended
to be used with the Operating and Instruction Manual for Neptune Series 500 and 500-A “Dia-Pumps”.
The Series 500-E-AR Pumps are identical to the Series 500-A except for an economy liquid head. All parts of the
instruction manual relating to Series 500-A are applicable to 500-E except for liquid head parts and valve
instructions. The 500-E-AR consists of: (1) liquid head casting, (1) suction valve
(P/N: 004498), (1) discharge valve
(P/N: 004503) and (1) air release valve (P/N: 104412).
Installation: Refer to installation instructions of the 500, 500-A and 500 E for proper set up of pump.
The unique
design of the "AR" liquid head allows you to vent off gases that may accumulate in the pump head from the air
release valve (P/N: 104412). You must connect tubing (3/16” ID X 5/16” OD) to the connection on the air release
valve and return it back to the supply tank or drain.
004586---- Complete Spare Parts Kit*
*Includes suction and discharge valve cartridges, diaphragm and all o-rings.
SERIES 500-E-AR
“dia-pump” INSTRUCTIONS