Flow Diagram (Fixed Speed Type); Legend Of The Diagram; Legend Of Sensors And Switches - Hitachi NEXT Series Instruction Manual

8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil/Water Flow]

Flow Diagram (Fixed speed type)

Suction
39
PS4
TH4
TH3
38
14
13 16

Legend of the Diagram

Compressor Air Flow
1 1st-Stage Air-End
2 2nd-Stage Air-end
3 Gear Case
4 Stepup Gear
5 Main Motor
6 Intercooler
7 Check Valve
8 Hi-Precooler
9 Aftercooler
10 Air Relief Valve
11 Discharge port
12 Check Valve
13 Drain Solenoid
14 Orifice
15 Motorized Isolation Valve
16 Y-type Strainer
Capacity Control & Blowoff Air Flow
21 Air Intake Filter
22 Suction Throttle Valve
23 Blowoff Valve
24 Blowoff Silencer
62
Air-Cooled
Exhaust
53 52
54
21
22
63SV
4
1
32
2
3
31
PS1
TH2
14
13 16
12
Oil Flow
31 Oil Strainer
32 Oil Pump
33 Oil Relief Valve
34 Oil Filter
35 Oil Cooler
36 Temperature Control Valve
37 Oil Mist Venting Pipe
38 Oil Drain Valve (1)
39 Oil Drain Valve (2）
40 Oil Drain Valve (3）
41 Oil Mist Remover
Cooling Air Flow and Enclosure
51 Cooling Fan (1)
52 Cooling Fan (2)
53 Enclosure
54 Air Intake Duct
Exhaust
51
24
37
23
MOHR
TH5
5
34
36
33
PS2
7
6 9
Air Intake for coolers

Legend of Sensors and Switches

Symbol
PS2
PS4
PS1
TH2
TH4
TH3
TH5
MOHR Thermostat (for main motor bearing)
63SV
41
Control air
Air Intake
for Motor
35
Air Intake
for coolers
40
8
10
15
M
Discharge
11
Part Name
Pressure Sensor (discharge air pressure)
Pressure Sensor (oil pressure)
Pressure Sensor (interstage pressure)
Temperature Sensor (2nd-stage in)
Temperature Sensor (1st-stage out)
Temperature Sensor (2nd-stage out)
Temperature Sensor (oil)
Pressure Differential Sensor
(For suction Filter clogging detection)