Webasto HL 90 Installation Instructions Manual page 20

Item Designation
A1 HL 90 heater
A1 HL 90 heater
A2 Control unit
A2 Control unit
B1 Flame monitor
B2 Temperature limiter
B3 Cabin thermostat
E Glow plug
F1 Blade-type fuse
F1 Blade-type fuse
F2 Blade-type fuse
F2 Blade-type fuse
F3 Blade-type fuse
F3 Blade-type fuse
H1 Switch-on indicator heating 24 V
H1 Switch-on indicator heating 12 V
H2 Switch-on indicator heating/ventilation 12/24 V
H2 Switch-on indicator heating/ventilation 12/24 V
H3 Symbol light for digital display
H4 Ready indicator heating
H5 Switch-on indicator heat-
K1 Relay
K2 Relay
K3 Relay
K4 Relay
K5/K6 Relay (as required)
K5/K6 Relay (as required)
M Motor
Figure 15: Legend to the circuit diagrams Figure 16 to Figure 18
44
Comment
24 V
12 V
24 V
12 V
12/24 V
12/24 V
12/24 V
4 V
24 V 20 A
12 V 20 A
24 V 20 A
12 V 20 A
12 V 10 A
24 V 7.5 A
In control unit
In control unit
In control unit
In control unit
24 V
12 V
24 V
Item Designation
M Motor
P Digital timer 1522
P Digital timer 1522
R1 Resistor
R1 Resistor
R2 Glow plug series resistor.
R2 Glow plug series resistor
S1 4-stage switch
S2 On/off switch
S3 Full load/part load heating switch
S4 Full load/part load heating thermostat
S5 Full load/part load ventilation switch
S6 Battery switch
T Transistor
XA Plug connection for recep-
XB Plug connection for recep-
XC Plug connection for recep-
X00 Terminal connection
X0 Terminal connection
X1 Plug connection
X2 Plug connection
X3 Plug connection
X4 Plug connection
X5 Plug connection
X6 Plug connection
X7 Plug connection
X8 Plug connection
Y Metering pump
Y Metering pump
HL 90
Comment
12 V
24 V
12 V
24 V
12 V
24 V
12 V
In vehicle
In control unit
6-pin
2-pin
14-pin
Glow plug -
Glow plug +
1-pin
2-pin
2-pin
2-pin
2-pin
2-pin
4-pin
8-pin
24 V
12 V
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