D
–EIMWC00803-21_01EN - 10/57
1
INTRODUCTION
This manual is an important supporting document for qualified personnel but it is not intended to replace such
personnel.
The units described in the present manual represent a valuable investment. Maximum care should
be taken to ensure correct installation and appropriate working conditions of the units.
THIS MANUAL, WIRING DIAGRAMS AND DIMENSIONAL DRAWINGS MUST BE CONSIDERED
ESSENTIALS, KEEP A COPY OF THESE DOCUMENTS ALWAYS AVAILABLE INSIDE THE UNIT.
Installation and maintenance must be performed by qualified and specifically trained personnel
only.
Correct maintenance of the unit is indispensable for its safety and reliability. Manufacturer
’s service
centres are the only having adequate technical skill for maintenance.
READ THIS DOCUMENT IN ITS ENTIRETY BEFORE BEGINNING ANY WORK ON THE UNIT.
ALL FEDERAL, STATE, LOCAL ENVIRONMENTAL AND SAFETY REGULATIONS INCLUDING DAIKIN
SAFETY RULES MUST BE FOLLOWED.
All appropriate Personal Protective Equipment (
“PPE”) must be used, and a Job Hazard Analysis
(
“JHA”) must be completed, before beginning any work on the unit.
Technicians performing this work must be properly trained on Daikin DWSC Centrifugal equipment.
Important Note: In case of any procedure requires accessing the refrigerant circuit of these units,
remember that refrigerant is under pressure and oils are contained in these circuits.
Ensure that all appropriate pump-down or pump-out service valves are in the correct position, open
or closed as required and holding.
Solenoid valves and expansion valves can trap refrigerant and oils, these devices must be o perated
manually to release any trapped gases and oils while in pump-down or pump-out operation.
All refrigerant lines and components of the unit must be evacuated to at least 30 kPa vacuum and
verified before opening any charging valves, venting schrader valves or testing ports.
These devices must be open and vented while accessing the refrigerant system. In some cases,
cross connection lines may be required to ensure recovery of all refrigerant in all sections of the
affected system or components.
All units are delivered from factory as complete sets which include wiring diagrams and
dimensional drawings with size, weight and features of each model.
In case of any discrepancy between this manual and the two aforesaid documents, please refer to
the wiring diagram and dimensional drawings.
Power Wiring
•
Qualified and licensed electricians must perform wiring. Shock hazard exists.
•
Connections to terminals must be made with copper lugs and copper wire.
•
Before any installation and connection work, the system must be switched off and
secured. After switching off the unit, when an inverter is installed, the intermediate
circuit capacitors of the inverter are still charged with high voltage for 5 minutes.
•
Before taking any action, switch off the main switch to cut off electricity to the
machine.
When the machine is off but the disconnecting switch is in the closed position, unused circuits are
always live.
Never open the terminal board box of the compressors unless the main switch of the machine has
been switched off.
•
The units of the series can be provided with non-linear high power electrical
components (inverters) which introduce higher harmonics, can cause considerable
leakage to earth, (higher than 300 mA). The electricity supply system protection must
take the above values into account.
Before starting the installation of the unit, please read this manual carefully. Starting up the unit is
absolutely forbidden if all instructions contained in this manual are not clear.
Commissioning of the unit (first start up) must be performed by Daikin representative.
It is absolutely forbidden to remove all the protections of the moving parts of the unit.
If the unit mounts suction and discharge valves they need to be secured in open position when the
unit is installed, by means of a lead seal or equivalent. This to avoid they are put in closed position.
The use of this valve is intended for compressor maintenance.
