21
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The case of the HIU is secured by the mounting bracket of the heat meter display and a screw through the top of the HIU.
1. Mount the display of the heat meter (if needed) to the bracket.
2. Position the bracket as shown (1) and make sure all cables are routed through the case and are tidy.
3.
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7.6
Removing and securing the case
7. Service
1
2
7.7 Grundfos pump
The Grundfos pump has 3 control modes (proportional pressure, constant pressure and constant curve). Each control
mode has 4 settings to choose from. The user interface has one push button, one red/green LED and four yellow LEDs.
7.8 Performance view
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consumption as shown in the table below.
Settings
You can choose between the performance view and settings
view. If you press the push button for 2 to 10 seconds, the
user interface switches to “select selection” if the user
interface is unlocked. You can change the settings as they
appear. The settings appear in a particular order in a closed
loop. When you release the button, the user interface
switches back to the performance view and the last setting
is stored.
7. Service
Stand-by (only externally controlled)
0%
Low performance
0 - 25%
Medium performance
25 - 50%
Medium High performance
50 - 70%
High performance
70 - 100%
PROP.PRESS.:CURVE 1
PROP.PRESS.:CURVE 2
PROP.PRESS.:CURVE 3
PROP.PRESS.:AUTO
ADAPT
CONST.PRESS.:CURVE 1
CONST.PRESS.:CURVE 2
CONST.PRESS.:CURVE 3
CONST.PRESS.:AUTO
ADAPT
CONST.CURVE.:CURVE 1
CONST.CURVE.:CURVE 2
CONST.CURVE.:CURVE 3
CONST.CURVE.:CURVE 4
SETTING OP
TIONS
