18. Appendix
Circuit diagram
AP
Control unit
TA
Thermostat connection
ST
Indicator lamp
LI 1 Safety thermostat
EV 1 Solenoid valve
EN
FO
Photoelectric cell
CO
Capacitor
MV
Fan motor
FUA Fuse 3.15 A
RV
Selector switch
Operating manual – IDS 20 / 30
B-9