Webasto Air Top 3500 Installation Instructions Manual page 23

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Pos. Designation
A1 Heater
A2 Electronic control unit
B2 Temperature sensor
B3 Temperature sensor (limiter)
E Glow plug / Flame detector
F1 Fuse24V 15A/12V 20A
F2 Fuse20A
F3 Fuse max. 15A
H1 LED green (in Pos. S1)
H3 LED red (in Pos. P)
H4 Heating symbol in display (in pos. P)
H5 Lamps (in pos. P)
H6 Lamp (min. 1.2W)
M1 Motor
M3 Motor
P Combination timer (1531)
S1 Control element
S2 Disconnecting switch 1 or 2 poles.
S3 Switch
Remarks
Air Top 3500/5000
Overheating protection
flat fuse SAE J 1284
flat fuse SAE J 1284
flat fuse SAE J 1284
operation indicator
Display illumination instant heating button
Operation indicator Operation indicator
light
Operation indicator
Illumination of display and buttons
Operation indicator light pumping device
Combustion and heating air fan
Vehicle fan
Digital timer and setpoint generator
Setpoint generator switch
Emergency Stop switch
at or for pumping device
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Pos. Designation
S6 Switch
S7 Push-button switch
S8 Battery disconnecting switch.
V1 Diode
V2 Diode
X1 Connector 2pole
X2 Connector 2pole
X3 Connector 2pole
X4 Connector 2pole
X5 Connector 2pole
X6 Connector 2pole
X7 Connector 12pole
X8 Connector 2pole
X9 Connector 4pole
X10 Connector 2pole
X11 Connector 2pole
X12 Connector 12pole
Y1 Metering pump,
Y2 Solenoid valve
Air Top 3500/5000
Remarks
Ventilation
Instant heating button remote control
atPos. A2 (ST B)
at Pos. A2 (ST V)
at Pos. A2 (ST U)
at Pos. A2 (ST Z)
at Pos. A2 (ST Y)
at Pos. A2 (ST X)
at Pos. A2 (ST1)
at Pos. S1
at Pos. Y1
at Pos. P
for pumping device
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