Technical data

7 Circuit Diagrams Thermo 230 / 231 / 300 / 301 / 350
710
Fig. 709 System Circuit SETRA, Ident.-Nr. 90972
ϑ
ϑ
ϑ
ϑ
1
1
1 Diagnostic connector
Item Nomenclature Remark
A1 Heater not grounded
A2 Control unit SG 1572D
B1 Flame sensor observe polarity
B2 Temperature sensor polarity optional
B3 Temperature limiter
B4 Thermostat for nozzle preheating
B5 Temperature sensor extern observe polarity
B6 Thermostat alternative to B3
E1 Heating cartridge for nozzle preheating
F1 Fuse 25 A flat fuse DIN 72581 part 3
F2 Fuse 25 A flat fuse DIN 72581 part 3
F3 Fuse 5 A flat fuse DIN 72581 part 3
H1 Light operation indicator light
H2 Light flame indicator
M1 Motor combustion air fan
M2 Motor circulation pump
S1 Switch on / off
S2 Continuity switch on water cock
Pos. Nomenclature Remark
S3 Switch, external trigger
circulation pump
required, if S2 not installed
S4 Switch power save operation
U1 Igniter box
U2 Igniter electrodes
W1 Wiring harness (1)
W2 Wiring harness (2)
A Plug connections, 6-pole
C Plug connections, 1-pole
D Plug connections, 4-pole
F Plug connections, 2-pole
X1 Plug connections, 10-pole
X2 Plug connections, 2-pole
X3 Plug connections, 8-pole
X4 Plug connections, 4-pole
X5 Plug connections, 4-pole
Y1 Solenoid valve
Y2 Shut-off valve with filter
Wire gauges
< 7,5 m 7,5 - 15 m
0,75 mm
2
1,0 mm
2
1,5 mm
2
2,0 mm
2
4,0 mm
2
1,5 mm
2
1,5 mm
2
2,5 mm
2
? mm
2
6,0 mm
2
2,5 mm
2
4,0 mm
2
bl
br
ge
gn
gr
or
rt
sw
vi
ws
Wire colors
blue
brown
yellow
green
gray
orange
red
black
violet
white