Multimaster Function; Systems With Two Or More Outlet-Pressure Sensors; Description Of Functions For The System; Settings - Grundfos Hydro Multi-E Series Installation And Operating Instructions Manual

11. Multimaster function

11.1 Systems with two or more outlet-pressure
sensors
If two or more pumps in the system are configured with an
outlet-pressure sensor (standard option), they can all function as
master pumps. By default, the pump with the lowest number will
be the master pump. From factory, the master pump is marked
with number 1.
If master pump 1 is switched off or stopped due to an alarm, one
of the other master pumps will automatically take control of the
system.

12. Description of functions for the system

Hydro Multi-E offers the following functions via Grundfos GO
Remote or the HMI300.

12.1 Settings

12.1.1 Setpoint
You can set the setpoint for all control modes when you have
selected the desired control mode. See section
mode.
Factory setting
See section 29. Factory settings.

12.2 Operating mode

The operating modes are the operating conditions to which the
pump system can be set by the user.
Possible operating modes:
• "Stop"
All pumps stop.
• "Normal" (factory setting)
One or more pumps are operating to maintain the set
pressure.
• "Max."
All pumps run at maximum speed.
The operating modes can be selected on the control panel, with
Grundfos GO Remote or via bus.
12.2.1 Normal operation
H
Hset
H
set
Fig. 29 Hydro Multi-E in normal operation, that is,
constant-pressure mode
In constant-pressure mode, Hydro Multi-E adjusts its
performance to the desired setpoint.
12.2.2 "Stop" or "Max." operation
In addition to "Normal" operating mode, you can select the
operating modes "Stop" or "Max.". See the example in fig. 30.
"Max." operation can be used, for instance, in connection with the
venting and startup procedures.
12.2.3 Operating condition in case of disconnection of power
If the power supply to Hydro Multi-E disconnects, the settings will
12.3 Control
be stored. Hydro Multi-E will restart in the same operating
condition it was in before the disconnection.
12.2.4 Further settings
You can make further settings with Grundfos GO Remote. See
section
Q
Max.
H
Fig. 30 Hydro Multi-E in operating mode "Max."
supply
11. Multimaster function.
Q
17