Instruction book 
2920 1472 03    13 
 
AF Air filter 
AS Pulsation damper 
AV  Air outlet valve (customer’s installation) 
CM Control module 
CV Check valve 
Eh  High-pressure compressor element 
El Low-pressure compressor element 
EWDi  Electronic drain, low-pressure element 
FN1 Fan, compressor coolers 
FN2 Fan, condenser 
M2  Fan motor, compressor coolers 
M3 Refrigerant compressor 
MTi  Condensate trap, intercooler 
OF Oil filter 
OP Oil pump 
SVh  Safety valve, high-pressure element 
SVi Safety valve, low-pressure element 
TV Load/no-load valve 
UA Unloader 
US Silencer 
Y1  Loading solenoid valve 
1 Chamber 
2 Plunger 
3 Chamber 
4 Diaphragm 
5  Condensate trap, dryer 
6  Air/air heat exchanger 
7  Air/refrigerant heat exchanger/evaporator 
8 Capillary tube 
9 Accumulator 
10 Refrigerant condenser 
11 Intercooler 
12  Hot-gas by-pass valve 
13  Liquid refrigerant filter/dryer 
14  Water outlet valve (customer’s installation) 
15 Aftercooler 
16 Oil cooler 
17  Regulating valve, oil cooler and intercooler water circuit 
18  Regulating valve, aftercooler water circuit 
19  Water inlet valve (customer’s installation) 
 
Note: References 14 up to 19 apply to ZR compressors only 
 
Figs. 1.6 Flow diagrams/regulating systems for Full-Feature compressors with ID dryer