YDR-FDU-PLAN54-08 06/17
AESSEAL plc, Complex Systems Division, Mill Close, Bradmarsh Business Park, Rotherham, S60 1BZ
Tel: +44 (0) 1709 369966 Fax: +44 (0) 1709 720788 www.aesseal.com
● Consult Grundfoss pump/motor manual for instructions on how to prime the pump; once the pump has been
primed it may now be started.
Nb. DO NOT start the pump until it has been filled with liquid and vented. Check rotation of motor by means
of the motor fan and label on top of the fan cover.
● Adjust the pressure by adjusting the selected systems pressure control valve, or other, until desired working
settings are reached.
● Ensure the desired pressure is reached by checking the pressure gauge/switch read out.
● Consult Grundfoss instruction manual for any pump/motor technical information.
Operation
● The 180 litre FDU arrangement requires little attention in operation, however the following should be
observed:
● The condition of the barrier fluid and suction filter must be checked after one week following commissioning
or any major maintenance such as a seal change. If satisfactory, further checks should be carried out at
monthly intervals.
● The fill point of the system is connection A on Fig.2 via the ball valve fitted at the top of the tank. The drain
point is connection B on Fig.2 which is also via a ball valve fitted at the base of the tank.
For system specifications and design limits, please see drawing.
Noise Emission Declaration
● In accordance with BS EN ISO 20361:2009 (Grade 2) and BS EN ISO 3744 the A-weighted emission sound
pressure level, LpA, does not exceed 70 dB (A). The noise measurements were taken at a distance of 1
metre from the surface of the system at a height of 1.6 metres from the floor and measurement uncertainty is
2.5 dBA.
Maintenance
The system should be maintained in accordance with site standards, or local regulations.
Daily
● Check and record the system pressure reading, any change may be a sign of a developing problem, such as
a blockage/advanced seal leakage.
● Check for signs of leakage from seal, system, and pipe work.
● Check water level, water supply and temperature.
● Check any alarms on the pressure and level switches or transmitters if fitted.
Monthly
● Any filters (If fitted), should be inspected every month and changed if contaminated/blocked.
● Any discolouration of the barrier fluid or contamination of the filter may be an indication of leakage of the
inboard mechanical seal, and should be investigated immediately.
