Bitzer ST-140-2 Mode D'emploi page 74

8.5 CSH circuit with simple refrigerant circulation
P
COND
DL
SL
P
LIQ
H
P
RL
P
OC
H( P) > P P P P
+ + +
COND LIQ OC RL
Fig. 23: CSH: example of thermosiphon oil cooling, circuit with primary receiver after the condenser. Alternative circuit design and refrigerant cir-
culation with pump or injector are also possible, information on request.
Temperature control either by thermostatically controlled control valve for refrigerant supply or by mixing valve. Setting temperatures: Thermo-
static control of the oil cooler . Also observe the maximum sensor temperature!
9 Alternative to oil cooling: direct liquid injection (LI)
Direct liquid injection is an alternative to oil cooling in certain cases, provided that a reliable function is guaranteed.
For some compressors, liquid is injected into the existing economiser connection, for others a separate LI connec-
tion is available (see dimensional drawings in the BITZER SOFTWARE).
For further information see Technical Information ST-610 , chapter "ECO operation combined with liquid injection
(LI) for additional cooling".
ST-140-2 // PDF Download 74