Danfoss Nessie Plug&Spray NPS 12.5CS Instructions d'installation et de mise en service - Page 7

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10. Commissioning:

Bleeding the filter

Bleeding the pump

Direction of rotation

Check the direction of rotation of the motor by briefly starting the

motor and watch the cooling fan. During this, the high-pressure

connection should not be connected (pressure less testing.) The fan

wheel has to turn clockwise. Compare with the arrow on the pump

or pump support.

Flushing the system

The Plug&Spray

units are protected from factory against corro-

sion and frost with MPG (monopropylene glycol). Flush the system

thoroughly before connecting the application to the high-pressure

discharge connection.

Adjusting the pressure relief valve

Turn on the water and open the ball valve. Press the red button several

times to bleed the filter housing. Repeat until no more air escapes from

the filter, just water.

Untighten the bleeding plug of the pump approximately one-two

revolutions. Bleed the pump until no more air escapes from the pump.

Close and tighten the bleeding plug!

Repeat the bleeding procedure for filter and pump after short

operation of the pump to prevent any remaining air from accumulating

in the pump.

If the direction is incorrect, swap two supply phases and check

again. With units with drive motor FCM 300 please check the

programming (see section on programming of the FCM 300 below).

Insufficient flushing can cause bacteria growth resulting in health

problems!

A pressure relief valve, type VRH 30 CA cartridge is installed in the

common connection block of the Plug&Spray

the discharge pressure between 25 and 140 bar.

Adjust the desired pressure at zero flow, by means when all nozzles

(consumers) are not in operation.

In units with variable speed, the relief pressure valve should always

be adjusted slightly higher than the PID controller set point, i.e. at set

point 70 bar, set the relief valve to at least 80-85 bar.

Untighten the retaining nut, turn the adjustment screw until the

desired pressure is read on the manometer, and tighten the retaining

nut to fix the setting.

521B0881 DKCFN.PI.020.F1.02

units allowing adjusting