Grundfos Hydro Multi-E User Manual

Constant differential
temperature
K
p
T
i
t
L2
- 0.5
10 + 5L2
5)
t
t
t
L2
5)
L2: distance in metres between heat exchanger and sensor.
Constant flow rate
K
p
T
i
Q
0.5 0.5
Constant pressure
K
p
T
i
p
0.5 0.5
p
0.5 0.5
Constant level
K
p
T
i
L
-20 0
L
20 0
General rules of thumb
• If the controller is too slow-reacting, increase the gain.
• If the controller is hunting or unstable, dampen the system by
reducing the gain or increasing the integral time.
Factory settings
See section Factory settings.
Related information
21.6 Factory settings
10.7
Operating range
Set the operating range as follows:
• Set the minimum speed within the range from fixed minimum
speed to user-set maximum speed.
• Set the maximum speed within the range from user-set
minimum speed to fixed maximum speed.
The range between the user-set minimum and maximum speeds is
the operating range.
1
2
3
4
5
100%
67%
24%
13%
0%
TM006785
Example of minimum and maximum settings
Pos. Description
1 Fixed maximum speed
2 User-set maximum speed
3 Operating range
4 User-set minimum speed
5 Fixed minimum speed
Factory settings
See section Factory settings.
Related information
21.6 Factory settings
10.8 Limit-exceeded function
This function can monitor a measured parameter or one of the
internal values such as speed, motor load or motor current. If a set
limit is reached, a selected action can take place. You can set two
limit-exceeded functions, meaning that you can monitor two
parameters or two limits of the same parameter simultaneously.
The function requires setting of the following:
Measured
This menu/display/function allows you to set the measured
parameter to monitor it.
Limit
This menu/display/function allows you to set the limit which triggers
the function.
Hysteresis band
This menu/display/function allows/enables you to set the hysteresis
band.
Limit exceeded when
This menu/display/function allows you to set whether the function is
to activate when the selected parameter exceeds or drops below
the set limit.
• Above limit. The function is activated if the measured
parameter exceeds the set limit.
• Below limit. The function is activated if the measured
parameter drops below the set limit.
24
English (GB)

Grundfos Hydro Multi-E Specifications

General

Product Name	Grundfos Hydro Multi-E
Category	Water Pump
Pump Type	Multi-stage centrifugal pump
Number of Pumps	2-4
Pressure Range	Up to 16 bar
Motor Power	Up to 22 kW per pump
Shaft Seal	Mechanical Seal
Control Type	Electronic
Pump Model	CRE
Power Supply	3 x 380-480 V, 50/60 Hz
Max Head	160 m
Approvals	CE
Communication	Modbus, BACnet
Housing Material	Stainless steel
Impeller Material	Composite
Connection Size	DN32
Motor Type	Permanent magnet motor