Safety - Daikin DWSC079 Installation, Operation And Maintenance Manual

Minimum entering condenser water temperature, operating: see page 14.
Minimum leaving chilled water temperature: 38F (3.3C)
Minimum leaving chilled fluid temperature with correct anti-freeze fluid: 15F (9.4C)
Maximum entering chilled water temperature, operating: 90F (32.2C)
Maximum oil cooler/VFD entering temperature: 90F (32.2C)
Minimum oil cooler/VFD entering temperature: 42F (5.6C)
Vibration Pads
The shipped-loose neoprene vibration pads should be located under the corners of the unit (unless the job specifications
state otherwise). They are installed to be flush with the sides and outside edge of the feet. Most DWSC units have six
mounting feet although only the outer four are required. Six pads are shipped and the installer can place pads under the
middle feet if desired.
Mounting
Make sure that the floor or structural support is adequate to support the full operating weight of the complete unit.
It is not necessary to bolt the unit to the mounting slab or framework; but should this be desirable, 1 1/8" (28.5 mm)
mounting holes are provided in the unit support at the four corners.
Note: Units are shipped with refrigerant and oil valves closed to isolate these fluids for shipment. Valves
must remain closed until start-up by the Daikin technician.
Nameplates
There are several identification nameplates on the chiller:
•
The unit nameplate is located on the side of the Unit Control Panel. It has a Style No. XXXX and Serial No.
XXXX, both are unique to the unit and will identify it. These numbers should be used to identify the unit for
service, parts, or warranty questions. This plate also has the unit refrigerant charge.
•
Vessel nameplates are located on the evaporator and condenser. Along with other information, they have a
National Board Number (NB) and a serial number, either of which identify the vessel (but not the entire unit).
•
A compressor nameplate is located on the compressor itself and contains identification numbers.

Safety

The machine must be firmly secured to the ground.
It is essential to observe the following instructions:
- The machine must be raised only by the lifting points. Only these points can support the whole weight of the unit.
- Do not allow unauthorised and/or unqualified personnel to access the machine.
- It is forbidden to access the electrical components without having opened the machine's general disconnecting switch
and switched off the power supply.
- It is forbidden to access the electrical components without using an insulating platform. Do not access the electrical
components if water and/or moisture are present.
- All operations on the refrigerant circuit and on components under pressure must be carried out by qualified personnel
only.
- Replacement of a compressor or addition of lubricating oil must be carried out by qualified personnel only- Sharp
edges can cause wounds. Avoid direct contact.
- Avoid introducing solid bodies into the water pipes while the machine is connected to the system.
- A mechanical filter must be installed on the water pipe connected to the heat exchanger inlet.
- The machine is supplied with safety valves, that are installed on both the high and the low pressure sides of the
refrigerant circuit.
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