Priming Of The Group - Pentair STA-RITE EASYBOOST Instructions De Service

DANGER - ELECTRIC SHOCK RISK
All the assembly operations must be carried out withgroup disconnected from the power grid.
In the case where the pressurization group is fed by a tank, avoid any unpriming phenomena; we recommend to control the following
characteristic data:
• Static level (initial level of the well)
To reduce losses during replenishment it is necessary to install the group as close as possible to the pumping point and to install a
suction pipe with a minor number of curvatures that should have a sufficiently wide radius.
Even the diameter of the pipe should be calculated so as to reduce load losses, what requires dimensions greater than or equal to those
of the pump aspiration inlet.
In order to avoid the formation of air locks into the suction pipes, these ones must have a positive gradient, from bottom to top, avoiding
counter gradients or "goosenecks", and there must not any air infiltration in the connections.
Connect the delivery collector to the distribution collector by interposing vibration-damping joint. This connection can be done either
on the right side or on the left side of the collector by displacing the blind flange or the threaded cover.
ATTENTION
It is a good rule to foresee the evacuation of water losses in case of bad seal of joints, mechanical seal, tanks overflowing, etc.
In the case where there would not be any pumping in close proximity from the group, on the discharge line, the installation of a test
faucet is recommended.
It is necessary to control from time to time the pre-replenishment pressure of membrane vessel that must be 0.2÷0.3 bar lower than the
minimum closing pressure of the pressure switch calibrated lower.
This control must be done without pressure in the installation or with the tanks disassembled.
CHAPTER 4

PRIMING OF THE GROUP

Refers to Fig. 1
DANGER - ELECTRIC SHOCK RISK
Always shut off the voltage before proceeding to any operation.
AVVERTENZA
The group needs to be filled up before putting it in operation.
In case of aspiration with positive suction head, open storage, aqueduct or water pipe under pressure, prime the group as follows:
• open all valves and remove the priming
plugs on the aspiration collector and
on the pumps
In the case where the group supply is with lower suction head, underground well or tank, prime the group as follows:
• open all valves and to and remove
the priming plugs on the aspiration
collector and on the pumps
• fill with water through the suction pipe
• Dynamic level (level reached during the
group operation)
• open the water supply on-off valve
until the evacuation of the liquid
• make the necessary topping-up
through the priming plugs on the pump
casing until complete filling-up
• Flow rate
• Hmax suction
• close again the feed faucet and the
pumping plugs
• re-assemble the plugs
GB
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