HS.53 ..74 with SE-i1, PW start, basic sensor kit

B1

Oil thermostat ①

B2

Control unit (cooling demand) or command for compressor start (release signal from the system controller) or controller On/Off

B6

High pressure transmitter

B7

Low pressure transmitter

F1

Main fuse

F2

Compressor fuse

F3

Control circuit fuse

F4

Oil heater fuse

F5

High-pressure switch

F6

Low pressure switch

F7

Oil flow switch

F9

Monitoring of oil stop valve

F10

Oil filter monitoring

F12

ECO control unit; pressure switch (ECO) (ATEX)

F13

Thermal overload relay "motor" PW1; star-delta: thermal overload relay "motor"

F14

Thermal overload relay "motor" PW2; star-delta: –

F17

Control transformer fuse

F21

Fuse of the heating element in the terminal box (only for HS.64 .. HS.74)

F30

Fuse of compressor protection device

H1

Signal lamp "motor failure" (overtemperature/phase failure)

H2

Signal lamp “pause time”

H4

Signal lamp “oil level fault”

H5

Signal lamp "oil stop valve fault”

K1

Contactor "1st part winding" (PW) or main contactor (star-delta) or compressor contactor (DOL or FI or soft starter)

K2

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

K3

Auxiliary relay or star contactor (star-delta)

K4

Auxiliary contactor “oil level”

K1T

Time relay “oil flow monitoring” HS.85: oil supply monitoring 20 s

K2T

Time relay “pause time” 300 s

K3T

Time relay "part winding" 0.5 s or "star-delta start" 1 s "star-delta start" only HS.85: 1.5 .. 2 s

K4T

Time relay "oil level monitoring 120 s" ①

K5T

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

M1

Compressor

N1

Frequency inverter (FI)

N3

Soft starter

Q1

Main switch

R1

Oil heater ①

R2

Discharge gas temperature sensor

R3..8

PTC sensor in motor

R9

Heating element for terminal box (only for HS.53 .. HS.74)

R10

Optional temperature sensor

R11

Auxiliary resistor

S1

Control switch (on/off)

S2

Fault reset "motor & discharge gas temperature, motor rotation direction, oil flow" and for HS.85: Fault reset "motor & discharge gas temperature, motor rotation direction, oil supply”

S3

Cancellation “pause time”

S4

Fault reset “oil filter chamber” (HS.85)

T1

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

U

Interference suppressor: varistor or RC element integrated into the solenoid valve plug if required

Y2

Solenoid valve "oil injection"

Y2

Solenoid valve "liquid line"

Y3

Solenoid valve “shut-down bypass”

Y4

Solenoid valve "capacity regulator CR1"

Y5

Solenoid valve "capacity regulator CR2"

Y6

Solenoid valve "capacity regulator CR3"

Y7

Solenoid valve "capacity regulator CR4"

Y8

Solenoid valve "ECO" (if required)