KT-420-4 // PDF Download
56
Abbr
.
Component
S2
Fault reset "over temperature" (motor / dis-
charge gas) and "lack of oil"
S3
Fault reset "lack of oil"
S4
Fault reset "frequency inverter fault"
S5
Digital input 1
S6
Digital input 2
S7
External release
S8
Switch for heat recovery
S9
Switch for monitoring of fan grating
S10
Switch for switching from EcoMode to Low-
SoundMode
S11
Fault reset of CIC control device
T1
Control transformer (example for 230 V)
U
Interference suppressor (if required, e. g. from
Murr Elektronik)
Y1
Solenoid valve "start unloading"
Y2
Solenoid valve "liquid line"
Y3
Solenoid valve "capacity control"
Y4
Solenoid valve “liquid injection”
Y5
CIC injection valve
Y6
Solenoid valve "heat recovery"
Y9
Solenoid valve "oil return"
Tab. 2: Overall legend for schematic wiring diagrams for reciprocating and scroll compressors
6
Electrical installation
This chapter covers some important aspects to be considered when installing and commissioning an external fre-
quency inverter.
• For frequency inverters not manufactured by BITZER: Please refer also to the respective operating instructions!
• For the BITZER VARIPACK frequency inverter, see Operating Instructions
. It also explains in detail
electrical connections and control functions.
For further information, see also ASERCOM Guidelines "
Recommendations for using frequency inverters with pos-
itive displacement refrigerant compressors
", chapter 6.
State of delivery of compressor:
CAUTION
The compressor is filled with a holding charge: Excess pressure 0.2 .. 0.5 bar nitrogen.
Risk of injury to skin and eyes.
Depressurise the compressor!
Wear safety goggles!