Operation Setting - Daikin AKZ9 Series Instruction Manual

PIM00318A_EN.fm Page 19 Tuesday, October 26, 2010 12:37 PM

Operation Setting

The Oil Cooling Unit operation setting provides the following modes.
Holding constant oil temperature
(Keeping a control target at a
constant temperature)
Tuning oil temperature to room
temperature (or machine
temperature)
(Keeping a constant temperature
difference between the control target
and the reference temperature)
Cooling oil at constant capacity (%)
(Executes cooling operation according to capacity
command, but disables oil temperature control.)
∗1: For control target measuring points, see the figure below.
∗2: Optional function using optional parts
∗3: Operation modes 2, 7 and 8 cannot be used.
∗4: K (Kelvin) is a symbol of the SI unit system that indicates a temperature difference (˚C).
System outline drawing
The oil cooling system of the Oil Cooling Unit is as shown below.
Inlet oil temperature thermistor (To "∗1" point)
Outlet oil temperature thermistor (To "∗2" point)
Returned oil temperature thermistor (optional)
(To "∗3" point)
Pressure reducing
Room temperature (Th3)
mechanism
B
C
∗4
Fan
M
(Refrigerant)
Compressor
(Refrigerant only)
Description on the refrigerating cycle
A: The compressor produces high-temperature, high-pressure compressed gas so that the refrigerant gas can be easily cooled and liquefied
in the condenser.
B: The condenser cools and condenses the high-temperature, high-pressure gas produced in the compressor, to transform it to high-temperature,
high-pressure liquid.
C: The pressure reducing mechanism throttles the high-temperature, high-pressure liquid to reduce pressure, and transform it to low-temperature,
low-pressure liquid/gas mixture so that it can be easily evaporated in the evaporator.
D: The evaporator evaporates the low-temperature, low-pressure liquid/gas mixture produced in the pressure reducing mechanism by absorbing
heat from the oil (by cooling the oil), and transforms it to low-temperature, low-pressure gas.
E: Bypass mechanism controls the cooling capability under lower load by adjusting the flow rate of high temperature/high pressure gases to be
distributed to the cooler.
Reference
Control method
temperature
Fixed temperature
control
Room
Tuning temperature
temperature
control
Machine
temperature
Capacity direct
None
designation
(used for trial
run etc.)
Room temperature thermistor
(To "∗4" point)
Machine temperature tuning
thermistor (Th1) (optional)
(To "∗5" point)
Outlet oil temperature
(Refrigerant)
D
(Oil)
E
(Oil)
M
A
Oil pump
Inlet oil temperature
Operation mode
∗1
Control target
(Reference page)
Inlet oil temperature
Outlet oil temperature
Returned oil
∗2
temperature
Inlet oil temperature
Outlet oil temperature
Returned oil
∗2
temperature
Inlet oil temperature
∗2
Outlet oil temperature
Returned oil
∗2
temperature
None
(Th2)
Oil outlet
∗2
Returned oil
temperature
∗1
Oil inlet
∗3
(Th4)
Oil tank
∗3
Setting range
0 (p. 20) 5.0–50.0 (˚C)
1 (p. 20) 5.0–50.0 (˚C)
1 (p. 20) 5.0–50.0 (˚C)
–
3 (p. 21) 9.9–9.9 (K)
–
5 (p. 21) 9.9–9.9 (K)
–
5 (p. 21) 9.9–9.9 (K)
–
4 (p. 21) 9.9–9.9 (K)
–
6 (p. 21) 9.9–9.9 (K)
–
6 (p. 21) 9.9–9.9 (K)
9 (p. 22) 0–100 (%)
∗5
Machining center
Machine
temperature
(Th1)
∗4
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