Technical data

Thermo 230 / 231 / 300 / 301 / 350 7 Circuit Diagrams
711
1 Diagnostic connector
2 Timer P:
with plus to connection 4 = continuous operating during immediate heating
without plus to connection 4 = heating period 1 hour
3 Pin assignment: Pin assignment 4wire lead 7wire lead
D1 0,75 gr 0,75 rt
D2 0,75 or 0,75 or
D3 0,75 gn 0,75 bl
D4 0,75 br 2,0 br
F1 not used 2,0 sw
F2
not used 2,0 rt/ws
4 Option
Item Nomenclature Remark
A1 Heater
A2 Control Unit SG 1572 D
B1 Flame Sensor observe polarity
B2 Temperature sensor polarity optional
B3 Temperature limiter
B4 Thermostat for nozzle preheating
B5 Thermostat alternative to B3
B6 Thermostat for vertical installation (MV Y1)
E Filter heater
E1 Heating cartridge for nozzle preheating
F1 Fuse 5A flat fuse DIN 72581 part 3
F2 Fuse 25A flat fuse DIN 72581 part 3
F3 Fuse 25A flat fuse DIN 72581 part 3
F4 Fuse 25A flat fuse DIN 72581 part 3
F5 Fuse 5A flat fuse DIN 72581 part 3
F6 Fuse 5A flat fuse DIN 72581 part 3
F7 Fuse 5A flat fuse DIN 72581 part 3
H1 Light operation indicator light
H2 Light flame indicator
H4 Heating symbol on the display Power-on indicator (in item P)
K4 Relay
M1 Motor combustion air fan
M2 Motor circulation pump
Item Nomenclature Remark
P Digital timer, standard (1531) For programmed operation
S1 Switch on / off
S3 Switch external trigger circulation pump
S4 Switch power save operation
S5 Switch Auxiliary heating mode
S6 Switch Filter heater on
T Temperature switch Filter heater
U1 Igniter box
U2 Igniter electrodes
W1 Wiring harness (1)
W2 Wiring harness (2)
W3 Wiring harness (3
A Plug connections, 6-pole
C Plug connections, 1-pole
D Plug connections, 4-pole
F Plug connections, 2-pole
O Plug connections, 2-pole
Q Plug connections, 2-pole
X1 Plug connections, 4-pole
X2 Plug connections, 2-pole
X3 Plug connections, 7-pole
X4 Plug connections, 12-pole
X5 Plug connections, 4-pole
Y1 Solenoid valve
Wire gauges
< 7,5 m 7,5 - 15 m
0,75 mm
2
1,0 mm
2
1,5 mm
2
2,5 mm
2
4,0 mm
2
1,5 mm
2
1,5 mm
2
2,5 mm
2
4,0 mm
2
6,0 mm
2
bl
br
ge
gn
gr
or
rt
sw
vi
ws
Wire colors
blue
brown
yellow
green
gray
orange
red
black
violet
white
Fig. 710 Automatic Control Circuit Rail with Control Unit 1572D and Standard Timer and filter heater