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7. START-UP
ATTENTION:
Do not start the pump until it has been filled with liquid and vented. If the
pump runs dry, the pump bearings and the shaft may be damaged.
DANGER:
· Pay attention to the direction of the vent hole and make sure that the
discharging water does not cause injury to persons or damage to the
motor or other components. In the case of hot-water installations, pay
special attention to the risk of injuries from scalding hot water.
· During operation, the outer surfaces of the pump and motor can exceed
40 ºC (104ºF). Do not touch any part of the body without adequate
protective gear. Do not place any flamable materials near the pump.
7.1. Preliminary check
Before starting the pump, check the following points:
· The foundation bolts of the pump must be securely fastened.
· The pump must be completely filled with water.
· The voltage of the installation must match the pump’s specifications.
· All the piping must be properly fastened and allow the desired flow rates.
· Valves in the suction pipe must be fully opened and the pressure pipes must be
slowly opened after the pump start-up.
· Check the operation pressure if a pressure gauge has been installed.
· Check all controls for normal operation. If the pump is controlled by pressure,
check the starting and stopping pressure set values. Check current maximum
value to avoid motor current overload.
7.2. Start-up procedure
Follow these instructions for a correct pump start-up:
1. Close the valve on the discharge side of the pump, and remove the priming plug
from the pump head.
2. Slowly open the valve on the suction side until water flows steadily out of the
priming hole.
3. Replace the priming plug and secure it firmly. Open completely the valve on the
suction side.
4. Start the pump and check the direction of rotation.
5. Check if the pump rotates in the correct direction according to the arrow on the
pump head. The pump should rotate counterclockwise as seen from the motor.
6. Bleed the pump through the bleed valve (vent screw) at the pump head.
7. Keep on bleeding the pump. At the same time, open the discharge valve very
slightly.
8. Tighten the vent screw when the flow rate is constant. Open the discharge valve
completely.
Содержание VDROO Series
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