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Convertible Jet Pumps
Models DCJ500 (#6330) & DCJ750 (#6331)
Operating & Installation Instructions
Please read these instructions carefully. Failure to comply with instructions and designed operation of this system may void
the warranty.
Your pump has been carefully packaged at the factory to prevent damage during shipping. However, occasional damage
may occur due to rough handling. Carefully inspect your pump for damage that could cause failure. Report any damage to
your carrier or your point of purchase.
This pump is designed for shallow well installation for water level up to 25 feet, with injector installed on pump body; or for
deep well installation for water level up to 80 feet, with 1-1/4" pipes and injector down in the well. A pressure switch and
pressure gauge are standard features. The pump starts when the pressure drops to a cut-in setting (30 psi) and cut-out
setting (50 psi). The DuroJet Convertible Jet Pump can be mounted to either a pre-charged horizontal pressure tank or used
with a pre-charged free standing pressure tank. The pumps can also be used with conventional air to water tanks. For deep
well applications, replace the short tube in the ejector assembly to long tube #302922 (sold separately).
NOTE: Pre-assembled pump and pre-charged pressure tank packages are also available.
Dual Jet
#54806EF Rev. 4/11
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Table of Contents
Summary of Contents for Water Duro Pumps DCJ500
- Page 1 This pump is designed for shallow well installation for water level up to 25 feet, with injector installed on pump body; or for deep well installation for water level up to 80 feet, with 1-1/4” pipes and injector down in the well. A pressure switch and pressure gauge are standard features.
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Page 2: General Safety Information
Keep work area clean, uncluttered and properly lighted – replace all unused tools and equipment. c. Keep visitors at a safe distance from work area. 7. When installing pump, cover the well to prevent foreign matter from falling into well and contaminating the water and damaging internal mechanical pumping components. -
Page 3: Pre-Installation
Tanks – Conventional Storage (Air to Water Tank) The function of the tank is to store a quantity of water under pressure. When full, the tank contains approximately 2/3 water and 1/3 compressed air. The compressed air forces the water out of the tank when a faucet is opened. An air volume control automatically replaces air lost or absorbed into the water. - Page 4 CAUTION! The foot valve should be at least 18” from the bottom or sand or sediment could be drawn into the system. NoTe: When a lake is used as a water supply, make sure the inlet pipe is deep enough to be submerged at all times. Slope the horizontal piping upward toward the pump to prevent trapping air.
- Page 5 CAuTioN! The foot valve should be at least 18” from the bottom of the well or sand or sediment could be drawn into the system. 4. After the proper depth is reached, install a well seal or pitless adapter to support the pipe and prevent surface water and other contaminants from entering the well. 5. Horizontal Piping - Connect horizontal piping to the well assembly. Gradually slope pipe up to the pump location, eliminating all dips and high spots and using as few elbow connections as possible.
- Page 6 5. Recheck the voltage after the pump motor has started. There should be some voltage drop, but voltage drop should be no more than 5% of the nominal voltage. CAuTioN: Failure to ground this unit properly may result in severe electrical shock. The motor has been factory connected for 115V. Refer to motor nameplate and instruction sheet for reconfiguration to 230V. use copper conductors only for field wiring connections. CAuTioN: This pump has been evaluated for use with water only. WARNiNG: To reduce the risk of electric shock, see instruction manual for proper installation procedure. Risk of electric shock – This pump has not been investigated for use in swimming pool areas. Wire Selection Guide Max. Wire Length in Feet, AWG Size...
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Page 7: Operation
4. Open a faucet to vent the system. 5. Start the motor. Water will be pumped within a few minutes. If the pump fails to prime within 5 minutes, stop the motor and refill the pump with cold water. The priming time is proportional to the amount of air in the inlet pipe. Refill as often as necessary. - Page 8 If the pump has been serviced, drained, or has not been used for some time, be sure there is water in the pump housing (volute) and the piping to the well. There must be water in the pump housing (volute) at all times when the pump is running to avoid internal damage of seal members (see page seven for priming information).
- Page 9 Parts Breakdown - For Deep Well Application DCJ500 (#6330) & DCJ750 (#6331) Drawing # item Numbers Part Description 302900 MOTOR, 1/2 HP, DCJ500 302901 MOTOR, 3/4 HP, DCJ750 302902 SCREW, DIFFUSER, 1/4-20 * 7/8" 302903 SCREW, HOUSING, 3/8-16 * 1-1/2" 302904 DIFFUSER, DCJ500, DCJ750 302905 IMPELLER, 1/2 HP, DCJ500 302906...
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Page 10: Performance Curves
Shallow Well Performance 1/2 HP Jet Pump 3/4 HP Jet Pump Discharge Pressure in PSI Discharge Pressure in PSI Lift Shut Off Lift Shut Off (FT) (FT) Capacity in USGPM Capacity in USGPM 15.1 12.2 67.0 20.7 14.9 62.0 14.8 11.7 66.0 20.2 14.4 61.0 14.6 11.5 66.0 19.5... -
Page 11: Troubleshooting Checklist
If pressure falls off quickly, leak is present. Inspect all connections and pipe sections. Check with soapsuds. d. Foot valve not submerged d. Check vertical distance to water level in well. Replace piping with longer length if necessary. 3. Motor overload - a. - Page 12 GUARANTEE This pump is guaranteed to do the work for which it is intended when properly installed and operated. It is warranted to be free of defects in material and workmanship for a period of two years from date of manufacture. The only exception shall be when proof of purchase or installation is provided and then the warranty period shall be from the date thereof.