Precautions For Installation - Daikin AKZ9 Series Instruction Manual

PIM00318A_EN.fm Page 6 Tuesday, October 26, 2010 12:37 PM

Precautions for Installation

Installation place and oil piping
To install this unit, select a place that meets the following conditions:
1. Horizontal and rugged floor face (vertical interval 5 mm or less)
When you install the product, fix it with a bolt (M10×20
hexagonal bolt is recommended).
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
(Ensure that no foreign matter enters the electric
component box.)
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.
Intake air
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. Use piping that can withstand a pressure of more than 1MPa and with oil resistance characteristics, and 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
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).
Suction strainer (Line filter)
Attach a strainer (mesh size: 100 to 150) with a small pressure loss to the oil piping system.
• 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 or replace the strainer before
starting actual operation. Check the strainer periodically.
• The oil pollution level must not exceed NAS class 10.
Oil tank
• 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 has a cleaning hole or the
tank top plate is detachable.)
6
Exhaust air
Right side view
7
.)
7. A place free from explosive atmosphere (evolution, inflow,
retention or leak of inflammable gas)
8. Do not install the unit outdoors.
9. Install the unit within 1 m of the tank level. (Otherwise, it
will affect the sucking capability of the pump.)
10. Keep any noise generating devices away from the unit. If it
is difficult to do so, implement appropriate measures on
the noise generating devices.
11. Leave safe, sufficient space around the unit to ensure
proper, trouble-free operations of the control panel.
OIL OUTLET
OIL INLET
OIL DRAIN
(No connection)
Rear view
2
/s.