CS. explosion-proof design zone 1

B2

Superior controller

F1

Main fuse

F2

Compressor fuse

F3

Control circuit fuse for low voltage

F4

Oil heater fuse

F5

High pressure switch

F6

Low pressure switch

F7

Cut-in delay "ECO"

F8-1

Oil level switch (minimum oil level)

F8-2

Oil level switch (maximum oil level)

F9

Control thermostat "refrigerant injection"

F10

Control thermostat for additional oil injection

F13

Overload protective device

F17

Control transformer fuse

F18

Control circuit fuse for extra low voltage

H1

Light "motor fault" (excess temperature/phase failure)

H2

Light "start delay"

H4

H4-1

H4-2

Light "oil level fault"

K1

Contactor "1st part winding" (PW) or main contactor (star-delta)

K2

Contactor "2nd part winding" (PW) or delta contactor (star-delta)

K3

Star contactor (star-delta)

K4

Auxiliary contactor

K2T

Time relay "pause time" 300 s

K3T

Time relay "part winding" 0.5 s or "star-delta" 1 s ,"star-delta" from CS.95: 1.5 .. 2 s

K4T

Time relay "oil level switch" 90 s

K5T

Time pulse relay "CR4" flashing function on / off 10 s

M1

Compressor

Q1

Main switch

R1

Oil heater

R2

Oil temperature sensor/discharge gas temperature sensor

R3..8

Temperature sensor in the motor

S1

Control switch (on/off)

S2

Reset "motor and discharge gas temperatures" or "motor rotation direction"

T1

Control transformer (example of 230 V, required according to EN60204-1)

U

Interference suppressor: Varistor or RC element, if required

Y1

Solenoid valve "capacity regulator" CR1

Y2

Solenoid valve "capacity regulator" CR2

Y3

Solenoid valve "capacity regulator" CR3

Y4

Solenoid valve "capacity regulator" CR4

Y5

Solenoid valve "liquid line"

Y6

Solenoid valve "ECO"

Y7

Solenoid valve "refrigerant injection"

Y8

Solenoid valve "additional oil injection"

Y9

Solenoid valve "oil cooler line"

SE-*

Compressor protection device for motor and discharge gas temperatures ①