Wilo 4032954 Notice De Montage Et De Mise En Service page 21

6.2 Function of the product
Variable speed control (Fig. 8)
The pump's speed is switched in three stages using a rotary
knob. The speed in the smallest stage is approx. 40 to 50 % of
the maximum speed with a reduction of the current consump-
tion to 50 %.
Special pump features
For a double pump, the two motor impeller units are fitted iden-
tically and are mounted in a common pump housing with inte-
grated switchover valve.
Each pump can run individually, but both pumps can also run at
the same time in parallel operation. The operating modes are
main/standby or parallel/peak-load operation. The individual
units can be configured for different capacities. With the dou-
ble pump, a system can be adapted to individual operating sit-
uations. It is necessary to connect a corresponding switchgear
for switching-over in order to control the different operating
modes.
7 Installation and electrical connection
DANGER! Risk of fatal injury!
Improper installation and electrical connection can result in
fatal injury.
• Installation and electrical connection may only be carried out
by qualified personnel and in accordance with the applicable
regulations.
• Adhere to regulations for accident prevention
Installation and operating instructions Wilo-Star RS/RSD
English
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