Wiring diagram key
Ref. Description
Base Selectable fuse carrier
cPHC Main board + expansion card
P Differential pressure switch (180/300/450 kg/h)
AL 3-pin through connector
A 4-pin through connector
Klixon 1/2/3 Safety thermostat
TRPS1 115-230 V transformer (UG45-90-150)
U-T-S 14-pin through connector
Z 14-pin through connector
Y-O 4-pin through connector
MSO ON/OFF switch (outdoor)
MS Two-pole ON/OFF switch
K.MINIMA Safety thermostat (outdoor only)
TRPS2 115-230 V transformer (UG180-300)
F1-F2 Power fuses
F3 Pump fuse
RD Pump control relay
FB1-FB2 Burner fan control relay
P Pressure switch control relay
RF1-RF2 Flame control relay 1-2
Tab.15.a
15.5 Electrical panel
Fig.15.e
112|15. Wiring diagrams
gaSteam - UG +0300090EN rel. 1.2– 09.10.2018
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