KT-420-4 // PDF Download
55
Abbr
.
Component
K1
Contactor "first PW" (for PW) or "main con-
tactor" (Y/Δ). Scroll compressor: compressor
contactor
K2
Contactor "second PW" (PW) or "delta con-
tactor" (Y/Δ)
K3
"Star contactor" (Y/Δ)
K4
Auxiliary relay (contactor PW1)
K5
Auxiliary relay (additional fan)
K8
Auxiliary relay frequency inverter
K9
Auxiliary relay frequency inverter
K10
Auxiliary relay ''compressor is compressor is
ready-to-operate''
K11
Auxiliary relay ''compressor release ''
K12
Coupling relay (for EC fans of LH .. E)
K13
Auxiliary relay for star-delta switching
K1T
Time relay "part winding start" or "star-delta
start"
K2T
Time relay "pause time" or (CIC, OLC-K1 &
scroll): time relay "cut-in delay" 300 s
K3T
Time relay "oil supply fault"
K4T
Time relay "alarm delay" 5 s
K5T
Time relay "capacity control"
K7T
Time relay "start unloading" (for frequency in-
verter)
K8T
Time relay "oil return"
K9T
Time relay "pre-unloading" approx. 15 s
K11T Time delay of compressor start for fan pre-
start
M1
Compressor
M2
Additional fan
M3
Fan 1 (with condensing units)
M4
Fan 2 (with condensing units)
N1
Frequency inverter (FI)
N3
Soft starter
Q1
Main switch
R1 ..
6
Temperature sensors in motor windings
R7
Discharge gas temperature sensor
R8
Oil heater (often: option)
R9
Sensor at motor cover
R10
Ambient temperature sensor
R11
Optional temperature sensor
S1
Control switch