26
12.5 Electric scheme
Scheme of electrical connections: L, N, PE – mains power 230 VAC, PE – protective clamp,
GR – earthing, CPU – controlling, FU – fuse (T6,3 A, 230 VAC), STB – connection to limiter of
safety temperature (disconnects the fan and feeder), W – fan, PG – feeder, PHD – HUW pump,
PB – boiler pump, FV – rotary burner cleaning motor, I – igniter, FH – burner feeder (stoker),
BT – boiler temperature sensor type CT4, WS – external temperature sensor (weather) type
CT4-P or CT6-P, FS – feeder temperature sensor type CT4, OS – flame optical sensor type OCP,
CWU - HUW temperature sensor type CT4, T - standard room thermostat type NO-NC, DZT –
additional thermal protection type DZT-1 (optional), ISM_xSMART – radio module and
eSTER_x40 room thermostat, ecoNET – ecoNET300 Web module.