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15. Bus signal
The pump supports serial communication via an
RS-485 input. The communication is carried out
according to the Grundfos GENIbus protocol and
enables connection to other pumps as well as a
building management system or another external
control system.
Via a bus signal, you can remote-set pump operating
parameters, such as setpoint and operating mode. At
the same time, the pump can, via the bus, provide
status information about important parameters, such
as actual value of control parameter, input power and
fault indications.
Contact Grundfos for further information.
In systems requiring a constant flow, independently of pressure drop.
Examples:
• chillers for air-conditioning
• heating surfaces
• cooling surfaces.
Constant flow rate
In systems requiring a constant tank level, independently of the flow rate.
Examples:
• process-water tanks
• boiler-condensate tanks.
Constant level
In systems with pumps operating in parallel.
The multipump function enables the control of two to four single-head
pumps connected in parallel and twin-head pumps without the use of
external controllers. The pumps in a multipump system communicate with
each other via the wireless GENIair connection or the wired GENI
connection.
Assist menu
Setup of multi-pump system
System application Select this control mode
If you use a bus signal, the number of
settings available via Grundfos GO are
reduced.
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