Webasto Air Top 3500 ST Installation Instructions Manual - page 33
Air Top 3500 ST / Air Top 5000 ST
Legend for circuit diagrams
65
Item Description
Comment
A1
Heater
Air Top 3500 ST/5000 ST
A2
Control module
B2
Temperature sensor
In control unit
B3
Overheating sensor
Overheating guard
B4
Temperature sensor
External
E
Glow plug / Flame monitor
F1
Fuse 24 V 15A/12V 20A
Flat fuse SAE J 1284
F2
Fuse 20 A
Flat fuse SAE J 1284
F3
Fuse max. 15A
Flat fuse SAE J 1284
H1
LED, green (in item S1)
Indicator
H3
LED red (in item P)
Light in immediate heat button,
ready indicator,
Switch-on indicator
H4
Heating symbol in the display
(in item P)
Indicator
H5
Light (in item P)
Display and button lights
H6
Light (at least 1.2 W)
Switch-on indicator pumping
device
K
Relay
with free-wheeling diode
for vehicle fan
M1
Motor
Combustion and hot air fan
M3
Motor
Vehicle fan
P
Combination timer (1531)
Timer and setpoint generator
R1
Resistor 620
Ω
With internal temperature
sensor only
S1
Control element
Setpoint generator switch
S2
1 or 2-pin
disconnecting switch
Emergency Stop switch
S3
Switch
On and for pumping device
S5
Switch
CO
2
setting
S6
Switch
Ventilation or boost
S7
Momentary-contact switch
Immediate heat button
remote control
S8
Battery isolation switch
V1
Diode
V12
Diode
X1
Plug connector, 2-pin
To item A2 (ST B)
X2
Plug connector, 2-pin
To item A2 (ST V)
X3
Plug connector, 2-pin
To item A2 (ST U)
X4
Plug connector, 2-pin
To item A2 (ST Z)
X5
Plug connector, 2-pin
To item A2 (ST Y)
X6
Plug connector, 2-pin
To item A2 (ST X)
X7
12-pin plug connection
To item A2 (ST 1)
X8
Plug connector, 2-pin
X9
Plug connector, 4-pin
to item S1
X10
Plug connector, 2-pin
X11
Plug connector, 2-pin
to item Y1
X12
12-pin plug connection
to item P
Y1
Metering pump
Y2
Solenoid valve
for pumping device
Item Description
Comment