Grundfos MAGNA3 D Installation And Operating Instructions Manual page 46

9.6.3 "Control mode"
Navigation
"Home" > "Settings" > "Control mode"
Set the operating mode to "Normal" before you
enable a control mode.
This menu offers the following options:
• AUTOADAPT (the pump starts with the factory setting)
• FLOWADAPT
• Prop. press. (proportional pressure)
• Const. press. (constant pressure)
• Const. temp. (constant temperature)
• Differential temp. (differential temperature)
• Constant curve
Setting
1. Select control mode with
2. Press [OK] to enable the control mode.
For details on the different control modes, see section 8.3 Control
modes.
Setpoint
When you have selected the desired control mode, you can
change the setpoint for all control modes, except AUTO
,
FLOW in the "Setpoint" submenu. See section
ADAPT
9.6.1 "Setpoint".
Control mode features
You can combine all control modes, except "Constant curve", with
automatic night setback. See section "Automatic Night Setback",
page 47.
You can also combine the FLOW
control modes mentioned above. See section "FLOWLIMIT",
page 47.
46
or .
and
ADAPT
function with the last five
LIMIT
9.6.4 "Controller settings" (not model A)
Navigation
"Home" > "Settings" > "Controller settings"
This menu offers the following options:
• Controller gain Kp
• Control. integr. action time Ti.
Setting
1. Select "Controller settings" with
2. Choose either "Controller gain Kp" or "Control. integr. action
time Ti" with or . Press [OK].
3. Press [OK] to start the setting.
4. Select digit with and and adjust with
5. Press [OK] to save.
A change of the gain and integral-time values affects all control
modes. If you change the control mode to another control mode,
change the gain and integral-time values to the factory settings.
Factory settings for all other control modes:
The gain, K , is equal to 1.
p
The integral time, T , is equal to 8.
i
The table below shows the suggested controller settings:
If you use a built-in temperature sensor as one of the sensors,
you must install the pump as close as possible to the consumer.
System/application
Heating
system
0.5
t
L2
L2 [m]
0.5
t
1)
In heating systems, an increase in pump performance results
in a rise in temperature at the sensor.
2)
In cooling systems, an increase in pump performance results
in a drop in temperature at the sensor.
L1: Distance in meters between pump and consumer.
L2: Distance in meters between consumer and sensor.
or and press [OK].
or .
K
p
T
Cooling i
1) 2)
system
10 + 5
- 0.5
(L + L )
1 2
- 0.5 30 + 5L
2