Riello P 140P/NA Installation, Use And Maintenance Instructions page 61

SWITCHBOARD
DIRECT START-UP
TA
TE
CMV
RT
MB
D7592
STAR-TRIANGLE START-UP
TA
TE
MB
D7593
2544500
CR
UV
F1
A5.1
PS
R
CR
UV
F1
KA5.1
A5.1
PS
R
29 GB
WIRING DIAGRAM KEY
MB - Burner terminal strip
CMV - Fan motor contact maker
RT - Fan motor thermal relay
MV - Fan motor
CR - Pre-heaters contact maker
S1 - Pre-heaters
TS - Safety control device
F1 - Noise filter
RS1 - Heater
RS2 - Heater
TE - Electronic Thermostat
H1 - Burner lock signal
PS - Reset button
Tm - Min. oil thermostat
TM - Max. oil thermostat
H2 - Oil high temperature signal
H2 - Oil low temperature oil signal
TA - Ignition transformer
UV - Photocell
A5.1 - Flame control box
VSR - Return safety valve
VSF - Flow valve
R - Fan motor thermal relay
A6.1 - Servomotor
VG - Pilot valve
VA - Air spraying valve
VS - Safety valve
V1 - Safety valve
PAV - Air-steam pressure switch
A6.1 - Pressure/temperature sensor
SA6.1 - Manual modulation selector
SA6.2 - Burner operation selector
A6.2 - Output power regulator
S - Fan motor starter sectionalising switch
F - Fuses
F2 - Fuse
K1 - Fan motor contact maker
K2 - Fan motor contact maker
K3 - Fan motor contact maker
K4 - Fan motor contact maker
HR - Indication of motor stop due to
thermal relay tripping
A4.1 - Pressure/temperature sensor
SA4.1 - Manual modulation selector
SA4.2 - Burner operation selector
A4.2 - Output power regulator
KA5.1 - Relay
T6A - Fuse
TR - Adjusting thermostat
H - Within range signal