Daikin DWSC079 Installation, Operation And Maintenance Manual page 28

Single/dual compressor centrifugal chillers
Table of Contents

Advertisement

When the machine is off but the disconnecting switch is in the closed position, unused circuits are
Never open the terminal board box of the compressors unless the main switch of the machine has been
(inverters) which introduce higher harmonics, can cause considerable leakage to earth, (higher than 300
Note: Do not make final connections to motor terminals until wiring has been checked and approved by a
Daikin technician.
Under no circumstances should a compressor be brought up to speed unless proper sequence and rotation have been
established. Serious damage can result if the compressor starts in the wrong direction. Such damage is not covered by
product warranty.
It is the installing contractor's responsibility to insulate the compressor motor terminals when the unit voltage is 600
volts or greater. This is to be done after the Daikin start-up technician has checked for proper phase sequence and motor
rotation.
Following this verification by the Daikin technician, the contractor should apply the following furnished items.
Materials required:
1.
Loctite brand safety solvent (12 oz. package available as Daikin part number 350A263H72)
2.
3M Co. Scotchfil brand electrical insulation putty (available in a 60-inch roll as Daikin part number
350A263H81)
3.
3M Co. Scotchkote brand electrical coating (available in a 15 oz. can with brush as Daikin Part Number
350A263H16)
4.
Vinyl plastic electrical tape
The above items are also available at most electrical supply outlets.
Application procedure:
1.
Disconnect and lock out the power source to the compressor motor.
2.
Using the safety solvent, clean the motor terminals, motor barrel adjacent to the terminals, lead lugs, and
electrical cables within the terminal 4OX to remove all dirt, grime, moisture and oil.
3.
Wrap the terminal with Scotchfil putty, filling in all irregularities. The final result should be smooth and
cylindrical.
4.
Doing one terminal at a time, brush the Scotchkote coating on the motor barrel to a distance of up to '/2"
around the terminal and on the wrapped terminal, the rubber insulation next to the terminal, and the lug and
cable for approximately 10". Wrap additional Scotchfil insulation over the Scotchkote coating.
5.
Tape the entire wrapped length with electrical tape to form a protective jacket.
6.
Finally, brush on one more coat of Scotchkote coating to provide an extra moisture barrier.
D–EIMWC00808-16HU - 29/64
Before taking any action, switch off the main switch to cut off electricity to the machine.
The units of the series can be provided with non-linear high power electrical components
The electricity supply system protection must take the above values into account.
CAUTION
always live.
switched off.
CAUTION
mA).

Advertisement

Table of Contents
loading

Table of Contents