User manual

Industrial Air Division
2920 1163 04
8
1.3 Electrical system
The system comprises (Figs. 2):
1. Compressor motor (M1) and fan motor (M2) 1)
2. Electronic control module (Fig. 7a)
3. Compressor start button (I) and stop button (O)
4. Emergency stop button (S3)
5. Electric cabinet (Fig. 5)
6. Sensors for the compressor element outlet temperature (TT11)
and for the air outlet pressure (PT20)
7. Dewpoint temperature sensor (TT90-Figs. 6) for Full-feature
compressors
8. Phase control relay (K25-Fig. 5)
1.4 Electronic control module
The control module consists of an electronic regulator and a control
panel.
1) Air-cooled compressors only
AF. Air filter
AR. Air receiver/oil separator
AV. Air outlet valve
BV. Oil cooler by-pass valve
Ca. Air cooler
Co. Oil cooler
CV. Check valve
Da. Automatic drain outlet, air cooler
moisture trap
Dm. Manual drain valve, air cooler
moisture trap
DP1. Oil drain plug, air receiver
DP2. Oil drain plug, oil stop valve
DP3. Oil drain plug, check valve
DP4. Oil drain plug, gear casing
E. Compressor element
E1. Control module
FC. Oil filler plug
FN2. Fan, compressor coolers
Gl. Oil level gauge
IV. Inlet valve
LP. Loading plunger
MT. Air cooler moisture trap
M1. Compressor motor
M2. Motor, compressor fan
OF. Oil filter
OS. Oil separator element
PT20. Pressure sensor, air outlet
Rf2. Restrictor
SV. Safety valve
TT11. Temperature sensor, compressor
element outlet
TT90. Temperature sensor, dewpoint
UA. Unloader
UV. Unloading valve
VI. Air filter service indicator
Vp. Minimum pressure valve
Vs. Oil stop valve
Y1. Loading solenoid valve
1. Control air flexible
2. Blow-off air flexible
3. Flexible, blow-off air or inlet air
4. Oil scavenging line
On Full-feature also:
FN1. Fan, dryer condensor
M1. Refrigerant compressor
M2. Motor, condensor fan
S3. Condensor fan control switch
S7. High pressure shut-down switch 1)
5. Air/air heat exchanger
6. Air/refrigerant heat exchanger
(evaporator)
7. Liquid separator
8. Refrigerant/refrigerant heat
exchanger 2)
9. Condensor
10. Liquid receiver
11. Expansion valve
12. Filter
1) TÜV-approved compressors only
2) Not on dryers of type ID120
Figs. 4. Air-oil and unloading-loading systems
See Figs. 6 for denomination of components
Fig. 5. Electric cabinet (typical example)
K111X4K25 F3 F2 F1 F7F4 F5 F6 1X1
K23 K22 Q15 1X2
F032
T2
T1
K21
F21