V-Flow Pump NV12-6S

Installation Instructions for V-Flow Pump NV12-6S

1. Preparation:
   • Inspect the pump and motor for any damage during shipment. Report any damage immediately to the carrier or dealer.
   • Ensure the installation site is level, stable, and provides sufficient space and ventilation for service and motor cooling.
   • Check that the pump model matches the job requirements.
2. Mounting the Pump:
   • Secure the pump base to a solid, flat surface to prevent vibrations during operation.
   • Align and support suction and discharge piping to avoid undue strain on the pump.
   • Install isolation valves on both the suction and discharge sides for maintenance convenience.
3. Piping Connections:
   • Ensure piping is properly sized and matches the pump's flanged connections (1.25” ANSI 150#).
   • Install gaskets on flanges to prevent leaks. Ensure they do not restrict flow.
   • Remove any protective stickers or caps from the suction and discharge flanges.
   • For hot water systems, include a bleed valve in the discharge line to relieve pressure during service.
4. Electrical Connection:
   • Have a certified electrician verify the electrical supply matches the pump motor's specifications (1-phase, TEFC).
   • Check motor wiring for correct rotation. Rotation should be counterclockwise when viewed from the motor's rear.
   • For 3-phase motors, reverse any two leads to correct rotation if needed.
5. Priming the Pump:
   • Remove the fill plug and fill the pump casing with water using a funnel.
   • Open the vent plug's 9mm needle valve to allow air to escape while filling.
   • Close the valve and reinstall the fill plug once water flows steadily from the vent.
6. Testing:
   • Open the suction valve fully and partially open the discharge valve.
   • Apply power to the motor and check for smooth operation without noise or vibration.
   • Gradually open the discharge valve to desired operating conditions.
7. Safety Precautions:
   • Never operate the pump without water. This can damage internal components.
   • Always replace coupling guards after installation to prevent injuries.
   • Ensure the pump is properly grounded and free from leaks before starting.