Changing Motor Speed; Water Cooling - Norton clipper CDR 353 Operating Instructions Manual

VERS.2015.05.19
Security Device P.R.C.D.
This circuit breaker must be connected to an electrical supply having the neutral connector
and the earth connector separated. If there is a connection between these two connectors
anywhere on the electrical net, the P.R.C.D. will automatically cut the circuit.
Therefore, check with a qualified electrician, that this separation is correctly made on your
electrical system.
If you use extension cables, make sure they have three wires.
This device can be uncertain with a generator. Ask the manufacturer of the generator if the
coils are properly separated.
This device works also as NVR ("No Volt Release"). It stops the electrical supply of the
machine during a power cut. Therefore, when electricity returns, the machine will not start.
You have to reengage the P.R.C.D. to continue to work.
Before working with the CDR 353, you have to test the P.R.C.D. In order to achieve this
follow these instructions:

Connect the motor to the electrical supply.

Engage the P.R.C.D. on I (or ON).

Press the T (or TEST) button: the P.R.C.D. has to trip on 0 (or OFF).
If the P.R.C.D. trips during work, switch the machine off, and separate it from the electrical
supply. Examine and repair the fault by checking every element of the system (connectors,
cables, motor).

3.4 Changing motor speed

Always switch the motor off before changing speed. Turn the gear change lever on the next
or previous gear. Turn the bit spindle by hand to allow the gear alignment.
Repeat these operations until you reach the required gear.

3.5 Water cooling

Ensure that water is flowing freely in the circuit as insufficient water supply may result in
premature failure of the diamond core bit.
To supply the machine with water:

Use the connector on the side of the motor. You can use either the water supply or a
manual or electrical pump.

Check if the water flow is right by looking through the cutting water. If it is fluid, the flow
rate is correct. If it is not fluid, but like mud or paste, you either have to check if the water
system is blocked, or increase the water flow rate.

Obstruct the existing hole when you have to enlarge it, so you can obtain a correct
cooling water inflow.

Eliminate the water escape ways and increase the flow rate to the maximum when you
have to drill porous or cracked materials, or make a second drill.

Use a water-collecting device when you drill overhead.

In case of frost, empty the water cooling system.
14
Kit CDR 353 + NBM 351_MAN_EN