Specifications

M
M
S2T
3
M
M
B
C
D
A
E
S3
PH
9
AKZ
SERIES
9
AKZ
SERIES
Pressure reducing mechanism
Fan
（Suction air）
（Compressor）
（Refrigerant）
*4
Oil pump
Oil inlet
Oil outlet
Tank
Machine tools
Evaporator Cooler
Control board
*2
*5
*3
（Oil）
*1
Inlet oil temperature thermistor （To *1）
Outlet oil temperature thermistor （To *2）
Oil temperature control thermistor （To *3）
〈Optional part〉
Room temperature thermistor （To *4）
Machine temperature
synchronous thermistor （To *5）
〈Optional part〉
Note） 1. Refer to Pages 19 and
20 for optional parts.
2. Refer to Pages 21 and
22 for detailed setting
and others.
【Refrigerating cycle】
A
：Refrigerant gas is converted into compressed gas at high temperature and high pressure by a compressor so that gas can be easily cooled and liquefied by a condenser.
B ：In the condenser, the gas at high temperature and high pressure made in the compressor is cooled with air and converted into liquid at high temperature and high pressure.
C ：The pressure reduction mechanism reduces the pressure of the liquid at high temperature and high pressure and converts it into liquid at low temperature and low pressure
by squeezing it so that it can be easily evaporated in a cooler.
D ：In the cooler, liquid at low temperature and low pressure made in the pressure reduction mechanism removes heat from oil, evaporates （cools oil）,
and is converted into gas at low temperature and low pressure.
E：The bypass mechanism controls the cooling capacity at low loads by adjusting the volume of gas at high temperature and high pressure supplied to the cooler.
Oil outlet
Oil inlet
*1
Inlet oil
temperature
thermistor
High-pressure
switch
（-C type only）
*2
Discharge gas
temperature thermistor
Oil
pump
*4
Electronic
expansion valve
Outlet temperature
thermistor
*5
Outlet oil
temperature
thermistor
Electronic
expansion
valve
Fan
Spindle of main machine
Tank of main machine
Condenser
*3
Condensation
temperature
thermistor
Compressor protection
thermostat
（-C type only）
Accumulator
Filter
Filter
Room
temperature
thermistor
Low pressure
gauge port
*1
*2
*3
*4
*5
Evaporator
Control board
Relief valve
MC
compressor
Oil drain
Plugged
Series piping system diagram
AKZ 9 SERIES
Bypass mechanism
Condenser
Principle and overall system diagram
Principle and overall system diagram/series piping system diagram
Hot gas
bypass valve