Red Jacket LPG Premier, Installation Manual, Page: 33 / 40

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Servicing The Red Jacket LPG Pump-Motor Unit
Degassing a Manifold and Replacing a Red Jacket LPG Pump-Motor Unit
Prior to Starting
• These instructions must be followed when replacing a submersible LPG pump.
• These instructions only relate to the degassing of the manifold and the replacement of the submersible pump,
and not to the dispenser which measures and register the actual sales of the product.
• The degassing of the manifold and the replacement of the Red Jacket submersible LPG pumps should only be
conducted in the presence of an authorized technician.
Degassing Procedure
Degassing is the procedure by which the gas concentration in the manifold and/or related piping system is safely
reduced to (and then maintained at) a level which is not higher than 10% of the lower explosion limit (LEL).
1. Disconnect the power supply of the submersible pump on the switchboard in the kiosk. (Secure the switch
against switching on).
2. Close ball valve in the liquid line.
3. Connect the nitrogen cylinder to the purge connection of the manifold.
4. Close the ball valve in the equalization line.
5. Open the purge connection and fill the manifold with nitrogen (pressure max. 1000 kPa [145 psi]) until you
hear the nitrogen bubbling from the inlet of the manifold.
6. Close the inlet ball valve and purge connection, secure the inlet ball valve against opening.
7. Disconnect the nitrogen cylinder.
8. Relieve the pressure of the manifold by opening the purge connection.
9. Disconnect the power cable from the junction box (mark the wires).
10. Disconnect liquid line.
11. Disconnect manifold cover.
12. Lift the pump, making sure to use suitable means for control and stability.
Replace the pump and restart the installation
1. Disconnect the pump/motor from the discharge head by unscrewing the four socket head screws.
2. Examine flange connections for corrosion roughness or small parts of old gasket. If so, smooth with fine emery
paper.
3. Examine discharge head for corrosion roughness or small parts of old gasket. If so, smooth with fine emery
paper.
4. Assemble the pump to the motor, and then the motor to the discharge head following the instructions
contained in the section entitled ‘ Installing A Red Jacket Submersible LPG Pump-Motor Unit on page 18’.
5. Disconnect the pressure gauge of the liquid line.
6. Re-install the new LPG pump into the manifold, making sure to use suitable means for control and stability.
7. Make sure the flange gaskets are in place.