Laird OL 4503, Specification And User Manual

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6.4 Electrical Connections
After implementing the mains cable connect the unit to mains by inserting the mains plug.
6.5 Carrying out Setting to Work
DANGER
Danger to life through electrical shock when working on the electrical equipment of the unit!

Switch off the unit before starting your work!

Disconnect the unit from mains by pulling the mains plug!

Verify that the installation is dead (volt-free)!

Carry out earthing or short circuiting!
CAUTION
Risk of damage through improper connections!
Improper integration of the unit into the safety circuit of the device to be cooled will lead to the
inoperativeness of the safety equipment listed in chapter 2.

All connections required must be incorporated according to the wiring diagram shown in the
addendum.

Ensure that all connected safety equipment is properly functioning!

All works should be carried out only by expert staff
NOTE
The unit is delivered without a mains cable. The electrical connection as well as the integration into the
safety circuit of the device to be cooled are the customer’s responsibility and must be accomplished by
expert staff.
Required information can be drawn from the specifications listed on page 16 and the wiring diagram in
the addendum.
CAUTION
Lack of coolant may destroy the pump!

Operate the unit only when the filling level of the coolant container is correct!

Check the filling level of the coolant container regularly!
After connecting the cooling circuit, filling the coolant container and finishing the electrical connection
follow the steps below for the setting-to-work of the unit:
1) Open the stop valve.
2) Let the unit run for about 1 minute in order to de-aerate the pump.
3) Switch off the unit.
4) Close the stop valve.
5) Let the unit run for about 10 minutes in order to fill and de-aerate the cooling circuit.
6) Switch off the unit.
7) Check the filling level using the inspection glass. Fill up oil, if required, until a liquid level in the
center of the inspection glass. Use a funnel in order not to moisten any current-carrying
components with oil.
8) Remount the unit cover.