GEA Bock HG4 R134a - Manual (Page 29)

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9| Dimensions and connections
SV
DV Suction line
Discharge line see technical data, Chapter 8
A Connection suction side, not lockable
1/8“ NPTF
A1 Connection suction side, lockable
7/16“ UNF
B Connection discharge side, not lockable
1/8“ NPTF
B1 Connection discharge side, lockable
7/16“ UNF
C Connectoin oil pressure switch OIL
7/16“ UNF
D Connection oil pressure switch LP
7/16“ UNF
D1 Connection oil return from oil separator
1/4“ NPTF
E Connection oil pressure gauge
7/16“ UNF
F Oil drain M 22 x 1,5
H Oil charge plug M 22 x 1,5
J Oil sump heater (accessories) M 22 x 1,5
K Sight glass -
L Connection thermal protection thermostat
1/8“ NPTF
N Connection capacity controller M 48 x 1,5
O Connection oil level regulator 3 x M 6
ÖV Connection oil service valve
1/4“ NPTF
P Connection oil differential pressure sensor M 20 x 1,5
Q Connection oil temperature sensor
1/8“ NPTF