• – Installation and repair of Webasto heating and cooling systems requires special Webasto training, technical information, special tools and special equipment. – NEVER attempt to install or repair a Webasto heating or cooling system unless you have successfully completed the factory training course and have the technical skills, technical information, tools and equipment required to properly complete the necessary procedures.

If you have the instruction manual that came with the heater check out. By DCT AFE 4' tbe w/muffler Webasto TSL-17 diesel coolant heater.

• 7.2 Thermo 90 ST Circuit Diagram Legend.21 www.webasto.us Webasto Product N.A., Inc. • Replacing the Heat Exchanger.41 Webasto Product N.A., Inc. • 9.2.7.2 Installation.41 10.Product Information www.webasto.us Webasto Product N.A., Inc.

• TABLE OF CONTENTS THERMO 90 ST Webasto Product N.A., Inc. The same applies if repairs are Any special safety regulations relevant to this instruction carried out incorrectly or with the use of parts other than manual will be highlighted in the relevant sections or text genuine spare parts.

• 1.5 S UGGESTIONS FOR MPROVEMENTS AND HANGES Complaints, improvement suggestions or corrections relating to this workshop manual should be addressed Webasto Product North America, Inc. Technical Documentation Group 15083 North Road Fenton MI 48430 Phone: 810.593.6000 PC-Fax: 810.593.6135 Webasto Product N.A., Inc. • 2 hours after the heater is switched on. Combustion air fan Fuel connection Temperature sensor Temperature limiter Heat exchanger Inlet, coolant Circulating pump Outlet, coolant Outlet, exhaust gas 10 Inlet, combustion air 11 Control unit Figure 1: Thermo 90 ST heater www.webasto.us Webasto Product N.A., Inc. • The signals are fed to the control unit where Figure 3: Heat exchanger they are processed. The flame status is monitored by the flame monitor whenever the heater is operating.

Webasto Product N.A., Inc. • The solenoid coil of the metering pump receives its pulses from the microprocessor in the control unit. 0-90° 0-90° 0° Figure 8: Fuel metering pump Figure 6: Circulating pump www.webasto.us Webasto Product N.A., Inc.

• GENERAL DESCRIPTION THERMO 90 ST This page for your notes. Webasto Product N.A., Inc. • The temperature in the cabin can also be controlled using The heater restarts when the coolant cools to the preset the vehicle’s own heater fan with a cabin thermostat. Temperature for switching back on. Www.webasto.us Webasto Product N.A., Inc.

• Flame monitor take-over Stabilization time Stabilization time Coolant temperature reduced Full load Full load Vehicle fan “On” Switch off (run-on) Control range Flame monitor “Cold” (0) Control pause Run-on ended (cool-down) Flame monitor “Cold” (0) Download the godfather 2 game mods free. Webasto Product N.A., Inc. • Temperature sensor interrupt or temperature sensor short circuit Metering pump interrupt or metering pump short circuit Fan motor interrupt or fan motor short circuit or fan motor incorrect speed Glow pin interrupt or glow pin short circuit Overheating www.webasto.us Webasto Product N.A., Inc. • FUNCTIONAL DESCRIPTION THERMO 90 ST This page for your notes. Webasto Product N.A., Inc. • 12 V and 24 V heaters. System is filled with the new fuel. The Thermo 90 ST D heater is also licensed for use with PME (bio-diesel), which complies with ASTM D6751 and DIN EN 14214.

• TECHNICAL DATA THERMO 90 ST HEATER Operation THERMO 90 ST B THERMO 90 ST D In Exhaust Gas Maximum 10. 12.0% by volume (permitted function range) adjustment values at approx. +20 °C Maximum 0 m (0 ft) 500 m (1640 ft) 1000 m (3280 ft) 10.6%. • Control unit enters fault lock-out status. Automatically Switch heater off and then on again. Flame extinguishes during operation Contact a Webasto service facility if heater operation does not start again. Heater overheats due to lack or loss of Top up coolant.

• Check cabling for damage, discontinuity and (flame monitor defective) short-circuit Flame monitor defective Replace flame monitor Flashing pulses Cabling Check cabling for damage, discontinuity and (temperature sensor short-circuit defective) Temperature sensor defective Replace temperature sensor Page 1 of 2 Webasto Product N.A., Inc. • F 09 Ceramic glow pin possible. Switch heater on.

F 10 Overheat condition F 11 Coolant circulating pump Contact a Webasto service facility if heater operation cannot be restored. F 02 Flame failure After 6 consecutive attempts, heater and control unit are locked out. • 1.5 mm or 1/16 in. Diameter wire). Remove the glow pin first.