Daikin AKZ8 Series, Instruction Manual

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5
Installation Pr
ocedure
Installation
Precautions for Installation
1. Make sure that the pressure loss at the oil inlet/outlet is within the following range:
• Suction pressure (at oil inlet) .......................... –30.7 to 0 kPa
• Discharge pressure (at oil outlet) .................... 0.5 MPa or less
2. Avoid using a valve in the middle of the piping.
If a valve is used, it causes a large pressure loss even when it is fully opened.
3. If the oil viscosity is high, or if there is a large pressure loss in external piping (other than the piping for the Oil Cooling
Unit), use a pipe with a larger diameter to reduce the pressure loss. (To change the pipe size, refer to “
Reference for
Pipe Selection ” on page .)
If the operating condition exceeds the specified range, it causes noise or fault of the unit. Use thorough caution about
the operating condition. Keep the oil viscosity at 1.4 to 200 mm
2
/s.
4. Wrap the pipe joints with sealing tape to prevent air entry or oil leak.
5. Make sure that the oil piping of the main machine is not blocked (fully closed).
Installation place and oil piping
„
To install this unit, select a place that meets the following conditions:
„
Do not place an object that may block air flow within 500 mm from the air intake/exhaust port.
Oil piping: Locations of the oil inlet, oil outlet and oil drain are shown below.
• If the evaporator (cooler) in the Oil Cooling Unit is clogged with dust, it causes not only cooling capacity deterioration, but also
a fault of the compressor or oil pump.
• During adjustment at trial run, the strainer gathers much dust from the oil piping system. Clean the strainer before starting
actual operation. Check the strainer periodically.
Suction strainer (Line filter)
Attach a strainer (mesh size: 100 to 150) with a small pressure loss to the oil piping system.
Oil tank
Right side view Rear view
OIL OUTLET
Exhaust air
Intake air
OIL DRAIN
(No connection)
OIL INLET
• To receive oil from the main machine oil piping system, provide an oil tank that can accept an increase/decrease in oil
quantity.
• Consider the tank structure so that inside of the tank can be easily cleaned. (For example, the tank top plate is detachable.)
1. Level, rigid floor (Inclination: 5˚ max.)
2. A place where the unit is not exposed to direct sunlight or heat
3. A place with proper ventilation and little humidity
4. A place where exhaust air does not circulate (exhaust air will
not be taken into the unit)
5. A place that allows easy access to piping and wiring
6. A place with little contaminant, waste, dust particles or
oil mist
7. A place free from explosive atmosphere (evolution, inflow,
retention or leak of inflammable gas)
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