Startup; Checks Before Startup; Starting Up The 186 Vacuum Change-Over Device - Grundfos 186 Instrucciones De Instalación Y Operación

4.3.2 Connecting the servomotor to the control cabinet
Observe the wiring diagram in the control cabinet.
Observe the separate supplier manual for the servomotor.
Do not mix up the plugs of the servomotor.
Pin assignment of servomotor (back of plugs)
S1/S2
5 4
3
6
1 2
Signal plug
1. Connect the servomotor to the control panel.
Mark the plugs with the respective abbreviation "S1/S2" or "UV".
2. Connect contact manometer battery 1 and contact manometer
battery 2 to the control cabinet.
3. Connect the control cabinet to the power supply.
4. Connect the contact output lines, if necessary.
5. Connect the heatings of the two LiquFilt devices (LiquFilt 1 and
LiquFilt 2), if present.
Related information
4.3.1 Wiring diagram

5. Startup

WARNING
Toxic material
Death or serious personal injury
‐
Startup must be carried out by authorised and trained
experts.
‐
Observe the material safety data sheets (SDS) of the
handled chemicals.
‐
Wear personal protective equipment when handling
chemicals.
For startup, all components of the entire system must be
ready for operation.
Observe the manuals of the system and all other
components.
10
UV
4
3
1 2
PE
Power plug

5.1 Checks before startup

Before startup:
• Check the electrical connections.
• Check the mechanical installation.
• Check the tightness of the entire system.
5.1.1 Checking the tightness of the vacuum side
Observe the manual of the vacuum regulator for the tightness check
on the pressure side.
Make sure that the injector is ready for operation.
1. Close the connecting valves of all drums or cylinders.
2. Start the injector.
3. Slowly open the adjusting valve at the dosing regulator.
The change-over device changes over several times.
The vacuum lines are evacuated.
After about 10 minutes, depending on the length of the vacuum
lines, the dosing regulator indicates no flow.
If the dosing regulator indicates a flow, the complete system must
be checked for leaks.
Checking the system for leaks
1. Disconnect the vacuum lines between the vacuum regulators
and the dosing regulator one after the other.
2. Close each disconnected line tightly.
If the dosing regulator stops indicating a flow, the last disconnected
component is leaky.
Repair or exchange the leaky component and check the tightness
again.

5.2 Starting up the 186 vacuum change-over device

The change-over device is always part of a gas dosing system. The
other components of the system determine the course of startup.
Before startup:
1. Set main switch (S1) to the container battery that is used first (1
or 2).
The lamp (L2 or L4) of the corresponding container battery lights
up.
Pressure must be present at the contact manometer of the
container battery.
2. Set main switch (S1) to "auto".
Related information
6.1 Control cabinet