Bitzer ST-140-2 Mode D'emploi page 51

Fig. 9: Side view HS.9593, the red outline indicates the additional bore with a set screw (corresponds to entry 24 in the dimensional drawing,
see Operating instructions SB-110 or BITZER SOFTWARE).
CSH and CSVH: Connections for external oil coolers
CSH and CSVH compressors have designated connections for external oil coolers. The connection positions for
each compressor can be found in the BITZER SOFTWARE:
1. choose the compressor type
2. choose the tab "Dimensions" for dimensional drawings
3. choose the tab "Information" for the legend of connection positions
– CSH: Connections for external oil coolers on the rear compressor side, directly below the discharge gas shut-
off valve (oval or rectangular flange)
– CSVH: Position 11a and b shows the connections for external oil coolers
CSH: Connection adapter and additional oil injection
Connection adapter:
• CSH65.3 / CSH75.3: Replace oval flange by connection adapter with control valve (option). Connection diameter
16 mm - 5/8" each, kit no. 367 912 01
• CSH85.3 / CSH95.3: Remove rectangular flange and replace with connection adapter with control valve (option).
Connection diameter 22 mm - 7/8" each, kit no. 367 912 02
• Connection adapter without solenoid valve on request (if a former type is to be replaced by a CSH.3 without con-
verting the system).
Optional control valves are available, they are integrated in the connection adapter. The control valve opens an ad-
ditional oil injection nozzle and should be controlled by a thermostat so that it opens when oil cooling is required.
Observe the application limits (see BITZER SOFTWARE). Details see Operating instructions SB-170 .
Due to the additional oil volume (cooler, piping), a solenoid valve may be necessary in the oil line. This is to avoid
oil migration into the compressor during standstill. Install the solenoid valve immediately before the oil inlet connec-
tion of the compressor, and energise it in parallel to the NO (normally open) contact of the compressor contactor.
Recommended additional components:
• sight glass to monitor oil flow
• manual shut-off ball valves in both feed and return lines for ease of service
• oil filter (max. 25 μm mesh size) in case of remote oil cooler or if cleanliness of components is not guaranteed
Up to an additional oil volume (cooler and piping) of 10% of the compressor's standard oil charge and in case of
guaranteed cleanliness of components and pipes, these additional measures can be omitted. Deviating layout cri-
teria must be secured by individual checks.
ST-140-2 // PDF Download 51