Unit installation

25
VW T5
Pos. Name Remarks
Legend for
Wiring Dia-
grams
A1 Heater unit Air Top 2000 ST
A2 Control unit
B1 Flame detector Only on gasoline unit
B2 Temperature sensor Internal
B3 Overheating sensor Overheating protection
B4 Temperature sensor External
E Glow element
F1 24 V 15 A/12 V 20 A fuse Blade fuse, SAE J 1284
F2 Fuse, 3 A Blade fuse, SAE J 1284
F3 25 A fuse Blade fuse, SAE J 1284
H1 LED, green (in Pos. S1) Operation indicator
H3 LED, red (in Pos. P) Lighting for immediate heating button, ready dis-
play, switch-on check
H4 Heating symbol in display (in Pos. P) Operation indicator
H5 Lamps (in Pos. P) Display and button lighting
H6 Lamp (at least 1.2 W) Switch-on check for feed device
K Relay with freewheeling diode For vehicle fan
M1 Engine Combustion and hot air fan
M3 Engine Vehicle fan
P Combination digital timer (1531) Digital timer and setpoint encoder
R1 Resistor 620 Ω Only with internal temperature sensor
S1 Heater control Setpoint encoder switch
S2 Isolator switch, 1 or 2-pin Emergency-Stop-switch
S3 Switch On and for feed device
S4 Switch Ventilation
S5 Switch Rollover sensor
S6 Switch CO
2
setting
S7 Momentary-contact switch Immediate heating button on remote control
S8 Battery isolator switch
S9 Additional switch Telestart switch-off function
V1 Diode
V2 Diode
X1 Plug connection, 2-pin At Pos. A2 (ST B)
X2 Plug connection, 2-pin At Pos. A2 (ST V)
X3 Plug connection, 2-pin At Pos. A2 (ST U)
X4 Plug connection, 2-pin At Pos. A2 (ST Z)
X5 Plug connection, 2-pin At Pos. A2 (ST Y)
X6 Plug connection, 2-pin At Pos. A2 (ST X)
X7 Plug connection, 12-pin At Pos. A2 (ST1)
X8 Plug connection, 2-pin
X9 Plug connection, 4-pin At Pos. S1
X10 Plug connection, 2-pin
X11 Plug connection, 2-pin At Pos. Y1
X12 Plug connection, 12-pin At Pos. P
Y1 Metering pump
Y2 Solenoid valve For feed device