ABB ACQ80, Руководство по прошивке

Страница: 47 / 390

Program features 47
The figure below shows the HQ performance curve of the pump for the flow
calculation function.
Settings
Parameter group
80 Flow calculation
(page
231
) and
81 Sensor settings
(page
237
)
 Pump cleaning
The pump cleaning function is mainly used to clean pumps whenever a blockage
occurs in the pump. This function consists of a programmable sequence of
forward rotation of the pump and helps to remove any residue or rags on the
impeller or piping.
Note: Pump cleaning function works only in external mode.
The main features of pump cleaning function are:
• prevents blockages and decreases the need of manual cleaning
• increases the lifetime of the pump, pipes and impellers, and
• improves energy efficiency of the system.
Pump cleaning sequence
The drive starts cleaning with a pulse in the opposite direction of the running
direction. The speed step size is same for both positive and negative directions.
H [m] or H [ft]
Q [m
3
/h] or Q [gpm]
4
2
1
3
5