Webasto Thermo Top C Installation Instructions Manual
DOC P/N 5000778C
KIT P/N 5000777B
Printed in USA
Webasto Thermo & Comfort N.A., Inc.
Coolant Heater
Thermo Top Series
Legend
1 Electrical Harness sockets
2 Coolant Outlet
3 Fuel Inlet
4 Exhaust
5 Coolant Inlet
6 Coolant Circulation Pump
7 Combustion Air Intake
Special Tools
– Hose Clamping pliers
– Torque Wrench
2
3
4
5
7
1
6
Light Duty Generic Installation
Instructions
Foreword
1.1 Scope and Purpose - - - - - - - - - - - - - - - - - 5
1.2 General Safety / Installation Instructions- - - 5
1.3 Symbol Identification - - - - - - - - - - - - - - - 6
1.4 General References - - - - - - - - - - - - - - - - 7
1.5 Preparation - - - - - - - - - - - - - - - - - - - - - - 7
Installation
2 Electrical Overview - - - - - - - - - - - - - - - - - 8
2.2 Electrical Harness - - - - - - - - - - - - - - - - - - 9
2.3 Fuse Tap Connection - Relay K-1 - - - - - - - 9
2.4 Routing Harnesses Through Bulkhead - - - - 9
2.5 Timer Installation - - - - - - - - - - - - - - - - - 10
2.6 Integration into the Blower System - - - - - 10
3 Heater Mounting - - - - - - - - - - - - - - - - - 12
3.1 Recommended Locations- - - - - - - - - - - 12
4 Fuel System - - - - - - - - - - - - - - - - - - - - - 16
4.1 Fuel Extraction - - - - - - - - - - - - - - - - - - - 16
4.2 Fuel Supply - - - - - - - - - - - - - - - - - - - - - 18
4.3 Fuel Lines - - - - - - - - - - - - - - - - - - - - - 18
4.4 Fuel Pump Installation - - - - - - - - - - - - - - 19
4.5 Integration into the Fuel System - - - - - - -19
5 Combustion Air Supply- - - - - - - - - - - - - -21
5.1 Air Intake Silencer Installation - - - - - - - - -21
6 Exhaust System - - - - - - - - - - - - - - - - - - -22
7 Integration into the Coolant System - - - - -22
7.1 Repositioning the Circulation Pump - - - - -23
8 Power and Ground Connections - - - - - - -24
8.1 GroundConnection - - - - - - - - - - - - - - - -24
8.2 Power Connection - - - - - - - - - - - - - - - -24
9 Final Inspection, Initial Start-up and
Concluding Work - - - - - - - - - - - - - - - -25
9.1 Final Inspection (use installation checklist) -25
9.2 Initial Start-up - - - - - - - - - - - - - - - - - - - -28
9.3 Concluding Work - - - - - - - - - - - - - - - - -28
10 Heater Lockout Reset Procedure - - - - - - -29
Electrical Harness Schematic - Part 1 - - - - - - - -30
Electrical Harness Schematic - Part 2 - - - - - - - -31
Heater Plumbing Schematic - Inline Method - -32
Programming the 24 Hour Digital
Timer- - - - - -33