Grundfos CONTROL MPC User Manual

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11.7.51 Pressure relief (4.4.8)
Fig. 96 Pressure relief
Description
This function is primarily used in heating and cooling applications.
The purpose of the function is to reduce the pressure in the
pipework by opening a solenoid valve if it exceeds a set limit.
If the pressure is not reduced within a given time, the solenoid
valve will be closed, and a warning can be given.
Fig. 97 Pressure relief
Setting range
• Setting of digital output.
• Setting of pressure to be monitored.
• Setting of valve opening pressure.
• Setting of band for valve opening pressure.
• Setting of warning or alarm.
• Activation of the function.
Setting via control panel
1. Mark the Settings menu with
2. Mark Monitoring functions with or , and press .
3. Mark Pressure relief with or , and press .
4. Mark Go to setting of digital output with or , and
press .
5. Select a digital output with or , and press .
6. Mark Pressure relief with or , and save with .
7. Return by pressing twice.
8. Mark Pressure to be monitored with or , and press
.
9. Mark Discharge pressure, System pressure or External
pressure with or , and save with .
10. Return with .
11. Mark Valve opening pressure with or . Set the
pressure with or , and save with .
12.Mark Band, valve opening pressure with or . Set
the pressure with or , and save with .
13.Mark Warning, Deactivated or Activated with or ,
and press .
14.Mark Delay with or . Set the time with or ,
and save with . (Only to be set if warning has been
activated.)
15.Mark Activated with or , and press activate the
function.
Factory setting
The function is deactivated.
TM03 8986 4807TM03 9206 3607
4
Band
Warning
delay
Valve opening
pressure
Valve opening pressure
minus band
P [bar]
Time [sec]
1: Solenoid valve opens.
2: Solenoid valve closes.
3: Solenoid valve opens.
4: Warning is activated.
5: Solenoid valve closes, and
warning is reset.
5
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Grundfos CONTROL MPC Specifications

General

Brand	Grundfos
Model	CONTROL MPC
Category	Control Systems
Language	English