Bitzer K073 Series, Operating Instructions Manual

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KB-200-5 42
B1 Superior controller
B2 Control unit of the capacity regulator
B5 Winter controller
F1 Main fuse
F2 Compressor fuse
F3 Control circuit fuse
F4 Oil monitoring
F5 High pressure switch
F6 Low pressure switch
F8 Fan circuit breaker (fan 1)
F9 Fan circuit breaker (fan 2)
F13 Overload protective device "motor" PW1
F14 Overload protective device "motor" PW2
F17 Control transformer fuse
H1 Light "overtemperature (motor and discharge
gas)"
H2 Light "oil supply fault"
K1 Contactor "1st part winding"
K2 Contactor "2nd part winding"
K1T Time relay "part winding start"
K2T Time relay "start delay"
K11T Time delay of compressor start for fan pre-
start
M1 Compressor
M3 Fan 1
M4 Fan 2
Q1 Main switch
R1-6 Temperature sensor in motor winding
R7 Discharge gas temperature sensor
R8 Oil heater
S1 Control switch
S2 Reset "overtemperature (motor and dis-
charge gas)"
S3 Reset "lack of oil"
T1 Transformer (example for 230 V)
Y1 Solenoid valve "start unloading"
Y2 Solenoid valve "liquid line"
Y3 Solenoid valve "capacity control"
8 Commissioning
For a detailed description, please refer to the com-
pressor operating instructions KB-104 and KB-520:
• Check tightness
• Evacuate
• Refrigerant charge
• Checks before starting
!
!
NOTICE
To prevent damage to the compressor, you
must ensure that the oil heater is operated as
described in the operating instructions of the
compressor KB-104.
• Compressor start
9 Operation
9.1 Regular tests
The condensing unit must be checked by a specialist at
regular intervals. The inspection intervals depend on
the refrigerant, the cooling medium and the operation
mode. They must be defined by the system operator.
CAUTION
Risk of injury due to escaping vapour on the
pressure relief valve
Do not work in the area where the vapour es-
capes from the pressure relief valve!
Check the following points:
• Oil level of the compressor.
• Evaporation temperature.
• Suction gas temperature.
• Condensing temperature.
• Difference between condensing temperature and air
intake temperature into the condenser.
• Discharge gas temperature.
• Oil temperature.
• Cycling rate.
• Current consumption of the compressor.
• Current consumption of the condenser fan(s).
• Visual inspection of the cables and of the electrical
connection points.
• Tightness of the refrigerating circuit.