Webasto Thermo 90 ST B, Thermo 90 ST D Installation Manual

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Coolant Heater
Thermo 90 ST B (Gasoline) Thermo 90 ST D (Diesel)
Installation Manual
– Improper installation or repair of Webasto heating and cooling systems can cause fire
or the leakage of deadly carbon monoxide leading to serious injury or death.
– Installation and repair of Webasto heating and cooling systems requires special
Webasto training, technical information, special tools and special equipment.
have successfully completed the factory training course and have the technical skills, technical information, tools and equipment required to properly complete the necessary procedures.
– ALWAYS carefully follow Webasto installation and repair instructions and heed all
WARNINGS.
– Webasto rejects any liability for problems and damage caused by the system being
installed by untrained personnel.
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Thermo 90 ST Table of Contents
Contents Page
1. Safety and General Information 3
1.1 Warning Symbols in this Installation Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2. Regulation for Installation in the Vehicle 4
2.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2 Position of the Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.3 Fuel Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Exhaust System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.5 Combustion Air Inlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.6 Water Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.7 Hot Water Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Purpose / Version 6
3.1 Purpose of the Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.2.1 Thermo 90 ST version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Installation 7
4.1 Installation site / Installation position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2 To install the heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 Model plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4 CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Installation Location Examples 8
6. Mounting the Heater to the Vehicle 9
6.1 Allowable Mounting Positions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7. Connection to the Vehicle Cooling System 12
7.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
7.2 Various Plumbing Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
7.3 Additional Heating System Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
8. Fuel Supply 16
8.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
8.2 Fuel Standpipe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
8.3 Fuel Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
8.3.1 Connecting two fuel lines with a coupler hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
8.4 Fuel Metering Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.4.1 Installation Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.4.2 Attachment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.5 Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9. Combustion Air Supply 21
10.Exhaust System 22
11.Electrical Connections 24
11.1 Power / Control Harness Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
11.2 Connecting the Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
12.Circuit Diagrams 26
12.1 Thermo 90 ST Circuit Diagram Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
13.Initial Start-up 29
14.Troubleshooting 30
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Table of Contents Thermo 90 ST
14.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
14.2 Fault Lock-out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
14.3 Diagnostic after a Fault Lock-out for the Thermo 90 ST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
14.3.1 Version with switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
14.3.2 Version with timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
15.Technical Data 31
15.1 Electrical Components: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
15.2 Fuel for Thermo 90 ST (Gasoline): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
15.3 Fuel for Thermo 90 ST (Diesel): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
16.Additional Installation Accessories 34
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Thermo 90 ST Safety and General Information
1. Safety and General Information
1.1 Warning Symbols in this Installation Manual
The purpose of safety symbols is to attract your attention to possible hazardous conditions. This manual uses a series of symbols and signal words which are intended to convey the level of importance of the safety messages. The progression of symbols is described below. Remember that safety messages by themselves do not eliminate danger and are not a substitute for proper accident prevention measures.
Indicates an imminently hazardous situation which, if not avoided, WILL result in death or serious injury.
DANGER
Indicates a potentially hazardous situation which, if not avoided, COULD result in death or serious injury.
WARNING
Indicates a potentially hazardous situation which, if not avoided, MAY result in minor or moderate injury or property damage.
CAUTION
It may also be used to alert against unsafe practices.
These symbols are used to alert the installer to important or useful information
OR
about proper installation of the equipment.
1.2 General Information
Webasto Product North America, Inc. is pleased to provide this installation manual for use with this new heater. When installed in accordance with the guidelines stated in this manual, you can expect to provide years of trouble-free, enjoyable operation for your customer.
This manual represents our latest effort to produce the best technical documentation possible. In our efforts towards continuous, ongoing product improvement, we encourage our customers to write to us with their comments or criticisms concerning this manual or product.
Please write to us at:
Webasto Product North America, Inc. Technical Documentation Group 15083 North Road Fenton MI 48430
You are also invited to fill out our online questionnaire concerning our technical documentation and web site at:
If you have any immediate questions concerning this manual, the installation procedures within or the product itself, please call us at:
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(800) 860-7866 or send a fax to: (810) 593-6001
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Regulation for Installation in the Vehicle Thermo 90 ST
2. Regulation for Installation in the Vehicle
Read this installation manual in its entirety before installing this equipment.
2.1 Scope
2.1.1 Subject to the provisions of paragraph 2.1.2,
internal combustion heaters must be installed in accordance with the requirements contained in this Annex.
2.1.2 In the case of vehicles and trailers with heaters
for liquid fuel, it is presumed that these vehicles comply with the requirements in this Annex.
2.2 Position of the Heater
2.2.1 Parts of the vehicle body and other components
in the immediate vicinity of the heater must be protected against excessive heat and the danger of contamination by fuel or oil.
2.2.2 The internal combustion heater must not pose a
fire hazard even when overheated. This requirement is deemed to have been met if care is taken during installation to ensure an adequate distance from all parts, as well as adequate ventilation and if fire-resistant materials or heat shields are used.
2.2.3 For passenger carrying vehicles such as shuttle
busses, transit busses, and coaches, the heater must not be installed in the passenger cabin. A device in a sealed cover, which also meets the requirements set out in paragraph 2.2.2, may be used, however.
2.2.4 The model/ Serial plate or a duplicate thereof
(duplicate model/ Serial plate) must be fitted in such a way that it is still clearly legible when the heater has been installed in the vehicle.
2.2.5 When positioning the heater, all reasonable
precautions must be taken to minimize the risk of personal injury or damage to items in the vehicle.
2.2.6 A clearly visible indicator within the user's field
of vision must show when the heater is switched on or off.
2.3 Fuel Supply
2.3.1 The fuel filler neck must not be located in the passenger compartment and must have a tightly fitting cap to prevent any fuel leaks.
2.3.2 The type of fuel and the fuel filler neck must be clearly identified on heaters for liquid fuel, for which the fuel supply is separate from the fuel supply for the vehicle.
2.3.3 A sign must be affixed to the fuel filler neck warning that the heater must be switched off before refuelling. An identical warning must also be included in the manufacturer's operating instructions.
2.4 Exhaust System
2.4.1 The exhaust outlet must be positioned in such a way that exhaust fumes cannot get into the interior of the vehicle through ventilation devices, hot-air inlets or open windows.
2.5 Combustion Air Inlet
2.5.1 The air for the combustion chamber of the heater must not be extracted from the passenger cabin of the vehicle.
2.5.2 The air inlet must be positioned in such a way that it cannot be obstructed by other objects.
2.6 Water Inlet
2.6.1 The supply of water to be heated must be protected against freezing with a suitable antifreeze additive to the required strength as directed by the manufacturer. The supply of water to be heated must be uncontaminated by corrosive compounds and other impurities.
2.6.2 The inlet line must be protected from damage.
2.7 Hot Water Outlet
2.7.1 Hot water lines within the vehicle must be positioned or protected in such a way as to exclude all risk of injury or damage caused by direct contact.
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Thermo 90 ST Regulation for Installation in the Vehicle
2.7.2 The water outlet line must be protected so that it cannot be obstructed by other objects or the flow of water through the lines be blocked.
IMPORTANT!
Failure to follow the installation instructions and the notes contained therein will lead to all liability being refused by Webasto. The same applies if repairs are carried out incorrectly or with the use of parts other than genuine Webasto service parts. This will result in the invalidation of the type approval for the heater and therefore of its homologation / type licence.
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Purpose / Version Thermo 90 ST
3. Purpose / Version
3.1 Purpose of the Coolant Heater
Thermo 90 ST coolant heaters are used in connection with the vehicle’s own heating system
– to heat the cab, – to defrost vehicle windows and – to preheat water-cooled engines, – to heat boats and motor-homes (recreational vehicles)
The water heater operates independently of the engine and is connected to the cooling system, the fuel system and the electrical system of the vehicle.
3.2 Versions
3.2.1 Thermo 90 ST version
Thermo 90 ST gasoline
Water heater for "gasoline" fuel
Thermo 90 ST diesel
Water heater for "diesel" fuel
The water heaters are designed for 12 V (Thermo 90 ST gasoline) and for 12 or 24 V (Thermo 90 ST diesel)
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Thermo 90 ST Installation
4. Installation
IMPORTANT!
The water heater must be installed outside the passenger cabin.
The requirements of the latest version of “Hazmat” must also be observed for the installation of the heater into vehicles used to transport hazardous substances.
4.1 Installation site / Installation position
The heater must be installed in as low a position as possible to allow the heater and circulating pump to be bled automatically. This is particularly important as the circulating pump is not self-priming.
The installation must be performed in accordance with the installation instructions provided in this manual.
NOTE:
If the vehicle manufacturer has issued specific installation instructions, they must be followed.
As a rule, installation in the engine compartment represents sufficient screening. Please contact the Webasto hotline in the event that radio interference occurs nevertheless.
4.2 To install the heater
The heater must be secured with at least three M8 screws. The screws must be tightened with a torque of 18 Nm. (13.3 lb-ft).
4.3 Model plate
The model plate must be positioned so that it cannot be damaged and must be clearly legible when the heater is installed (otherwise a duplicate model plate must be used). Inapplicable years must be erased from the model plate.
4.4 CE mark
The Thermo 90 ST water heater carries the CE mark since it complies with the regulations in force. The heater satisfies the requirements of class A. As a result, the following supplement applies:
WARNING
This is a class A device. This device may induce radio interference in residential areas; in this case, the owner may be required to undertake appropriate measures.
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Installation Location Examples Thermo 90 ST
5. Installation Location Examples
Figure 1: Installation locations
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Thermo 90 ST Mounting the Heater to the Vehicle
6. Mounting the Heater to the Vehicle
6.1 Allowable Mounting Positions
3
1
2
Coolant Direction
Fuel Connection
Figure 2: Allowable enclosure kit mounting positions, 1 and 2 only. Position 3 is not permissible.
=
Figure 3: Permitted installation positions for the Thermo 90 ST heater - Enclosure and Compact Kits
=
Figure 4: Permitted installation positions for the Thermo 90 ST heater - Compact Kits only
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Mounting the Heater to the Vehicle Thermo 90 ST
CAUTION
Do not drill holes through top or bottom of vehicle frame flanges! Do not weld vehicle frame or flanges!
80mm (3-5/32”)
70mm
(2-3/4”)
Figure 5: Drill frame within the shaded area only!
310mm (12-13/64”)
80mm
(3-5/32”)
70mm
(2-3/4”)
150mm
(5-29/32”)
23mm
(29/32”)
Figure 6: Mounting heater enclosure via back wall (Vertical or horizontal mounting)
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45mm
(25/32”)
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Thermo 90 ST Mounting the Heater to the Vehicle
150mm
150mm
484mm
363mm
158mm
500mm
Figure 7: Optional perpendicular mounting with bracket kit P/N 905822 or P/N 905838 (Freightliner style)
Figure 8: Optional cross-frame mounting bar/clamp kit P/N 600055 (Also see Figure 1)
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Connection to the Vehicle Cooling System Thermo 90 ST
7. Connection to the Vehicle Cooling System
7.1 General Information
The heater is connected to the vehicle cooling system as shown in Figures 10 through 15, depending on the type of heating system the vehicle is equipped with. The system must contain at least 6 litres (1.6 US Gal.) of coolant. The system must be filled with an antifreeze and water mixture as recommended by the vehicle manufacturer. Coolant flow throughout the system must be maintained in all operating conditions.
If desired, shut-off valves can be installed at the engine inlet and outlet connections of the coolant heater circuit, although, shut-off valves are not mandatory. All valves should remain open throughout the year.
IMPORTANT!
To maintain optimum heater condition, periodically run heater for ten or more minutes monthly during the off-season. Ensure any shut-off valves are open before operating the coolant heater.
• Use 1/2” or larger NPT pipe fittings for hose connections at engine.
• Use good quality, heavy duty 3/4” ID. coolant hose for the coolant heater circuit.
• Hoses must be installed without kinks and bends which may restrict coolant flow.
• To ensure proper bleeding of air, keep hoses rising if possible. Avoid “goose necks” to prevent trapping air.
• Hoses must be supported where required to prevent chaffing and damage from vehicle components.
• Hose connections must be secured by hose clamps to prevent them from slipping off.
• Coolant heater flow direction should match the flow direction of the engine’s coolant circulation system.
IMPORTANT!
The hose clamps must be tightened with a torque of 4 Nm. (35 lb.-in.) The use of silicone hose requires special hose clamps.
Separate the heater supply and return
Optimum Cross-Flow Through Engine
connections at the engine as far apart as is practical for optimum engine heating and heater performance. See Figure 9.
Figure 9: Ensure optimum cross-flow
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Thermo 90 ST Connection to the Vehicle Cooling System
The cooling system must be bled carefully before using the heater for the first time or after replacing the coolant.
Proper venting of trapped air can be identified by the circulating pump operating almost silently. Poor bleeding may cause the resetting temperature limiter to trip whilst the heater is operating.
7.2 Various Plumbing Configurations
Select the appropriate plumbing configuration according to the customers requirements and the vehicle system type.
Figure 10 illustrates an engine preheat / boost heat configuration.
Figures 11 through 14 illustrate configurations for bunk heat and engine preheat / boost heat.
Figure 15 illustrates a system for vehicles with continuous fan operation or high amperage heat exchanger fan designs. In this case, the addition of a low amperage draw, auxiliary heat exchanger system is recommended. Webasto offers a complete kit under part number 905670 for this application.
1. Coolant supply connection
2
7
1
2. Vehicle heat exchanger
3. Coolant pump
4. Thermo 90 ST heater
5. Coolant return connection
6. Engine coolant pump
7. Thermostat
4
3
Figure 10: System configured for engine pre-heating and boost heating.
22
1
4
3
6
5
1. Coolant supply connection
2. Vehicle heat exchangers
3. Coolant pump
4. Thermo 90 ST heater
5. Coolant return connection
7
6
5
6. Engine coolant pump
7. Thermostat
Figure 11: System configured in a “series” fashion with both heat exchangers.
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Connection to the Vehicle Cooling System Thermo 90 ST
1. Coolant supply connection
22
7
1
6
4
5
3
Figure 12: System configured in series with rear heat exchanger in a “dual” circuit heating system.
22
7
1
2. Vehicle heat exchangers
3. Coolant pump
4. Thermo 90 ST heater
5. Coolant return connection
6. Engine coolant pump
7. Thermostat
1. Coolant supply connection
2. Vehicle heat exchangers
3. Coolant pump
4. Thermo 90 ST heater
5. Coolant return connection
6. Engine coolant pump
7. Thermostat 4-way back-check valve
6
4
5
3
Figure 13: System configured in the rear heat exchanger circuit using an optional 4-way back-check valve.
1. Coolant supply connection
22
2. Vehicle heat exchangers
3. Coolant pump
4. Thermo 90 ST heater
5. Coolant return connection
6. Engine coolant pump
7. Thermostat
8. Automated control valve
10
8
7
9
1
9. Wye connectors
9
6
4
5
3
10. Bypass hose 13-16mm I.D. (1/2”- 5/8” I.D.)
Figure 14: System configured with a bypass circuit within the rear heat exchanger circuit where an automated flow
control valve is installed. Bypass is required in the event the valve is closed during heater operation.
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Thermo 90 ST Connection to the Vehicle Cooling System
1. Coolant supply connection
11
9
4
3
Figure 15: System configured with an additional auxiliary heat exchanger connected in “series / parallel” with rear heat
exchanger circuit. (Recommended for Kenworth AeroCab & Studio Sleeper built before July 1994, Ford Aeromax, and Navistar CEO & Conventional Cab.)
22
8
7
1
9
6
5
2. Vehicle heat exchangers
3. Coolant pump
4. Thermo 90 ST heater
5. Coolant return connection
6. Engine coolant pump
7. Thermostat
8. Automated control valve
9. Wye connectors
10. N/A
11. Auxiliary heat exchanger
7.3 Additional Heating System Accessories
Webasto offers a line of Sleeper Pack Interface Wiring Kits that work with many OEM HVAC systems. These kits simplify the installation and pairing of the Webasto coolant heater with the vehicle’s own bunk heating system.
The Sleeper pack interface takes control of the bunk heater during coolant heater operation. With the coolant heater off, the bunk heater system control is returned to the vehicle’s control panel.
Consult to your Webasto Sales Representative for Sleeper Pack availability by vehicle make, model and year.
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Page 18
Fuel Supply Thermo 90 ST
8. Fuel Supply
8.1 General Information
The values for the maximum pressure at the fuel extraction point are shown in the table below and in Figure 17.
Permissible fuel inflow
height H
0.00 m (0.00 in.) 0.2 bar (2.9 PSI)
1.00 m (39.4 in.) 0.11 bar (1.6 PSI)
2.00 m (78.7 in.) 0.03 bar (0.44 PSI)
Maximum fuel intake
height S
0.00 m (0.00 in.) -0.10 bar (-1.45 PSI)
0.50 m (19.7 in.) -0.06 bar (-0.87 PSI)
1.00 m (39.4 in.) -0.02 bar (-0.29 PSI)
At maximum pressure
in fuel line
At maximum negative
pressure in the fuel tank
The fuel is taken from the vehicle fuel tank or from a separate fuel tank. The exploded view in Figure 16 Illustrates the progression of fuel system components.
A sign must be affixed to the fuel tank’s filler neck warning that the heater must be switched off before refuelling.
l1 + l2 ≤ 10 m l
≤ 1. 2 m
2
≤ 8. 8 m
l
2
Figure 17: Fuel system parameters
B
A
A. Fuel standpipe
B. Connector hose C. Fuel filter
D. Hose clamp
Figure 16: Fuel system components
F
E
D
°
C
E. Fuel pump
F. Fuel line (Mecanyl)
G. 90° Connector hose
0
G
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Page 19
Thermo 90 ST Fuel Supply
8.2 Fuel Standpipe Installation
To install the standpipe:
This separate fuel pickup precludes any effect of pressure.
Where available, a spare NPT threaded port can be utilized for the standpipe. If a spare port is not present, proceed with the following instructions under “To install the standpipe”.
A
B
C
D
Ø 25mm (1”)
E
F
1. bore a 25mm (1”) hole through top of fuel tank (item G, Figure 18).
2. remove sharp burrs and smooth edges with emery cloth.
3. determine length of standpipe when installed. End should sit at least 25mm (1”) above tank bottom. Cut off excess standpipe at a 45 degree angle. Remove burrs.
4. loosely assemble items C, D, E, and F (Figure 18).
5. place sealing compound on threads of item B and thread into item F. Tighten item B completely.
6. slide standpipe into hole at angle. Slip one shoulder of item F, Figure 18 inside the hole as shown in Figure 19.
Fuel Tank
Ø 25mm (1”)
Detail View
A. Fuel standpipe
B. Compression fitting C. Hex nut
D. Metal washer
E. Rubber washer
F. Tank boss 1/4” NPT
G. 25mm (1”) hole
25mm (1”)
F
G
Figure 19: Standpipe installation - illustration 1
Figure 18: Webasto fuel standpipe
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Page 20
Fuel Supply Thermo 90 ST
7. bring standpipe up to horizontal and insert opposite shoulder under the tank hole. See Figure 20.
8. center standpipe in tank hole. See Figure 21.
Figure 20: Standpipe installation - illustration 2
Figure 21: Standpipe installation - illustration 3
9. pull up on standpipe and tighten in place with the clamping nut (item A in Figure 22). Do not over­tighten causing rubber washer to squeeze out!
A
Fuel Tank
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Figure 22: Standpipe installation - illustration 3
Page 21
Thermo 90 ST Fuel Supply
12 V and 24 V – Gasoline and Diesel (with damper)
8.3 Fuel Lines
Only steel, copper and plastic lines made of plasticized, light and temperature-stabilized PA 11 or PA 12 (e.g. Mecanyl RWTL) pursuant to DIN 73378 may be used for the fuel lines.
Since the lines normally cannot be routed with a constant rising gradient, the internal diameter must not be allowed to exceed a certain size. Air or gas bubbles will accumulate in lines with an internal diameter of more than 4 mm (5/32 in.) and these will cause malfunctions whilst the heater is operating if the lines sag or are routed downwards. The diameters specified in Figure 17 will ensure that bubbles do not form.
The lines should not be routed downwards from the metering pump to the heater.
Unsupported fuel lines must be secured to prevent them from sagging. They must be installed in such a way that they cannot be damaged by flying road debris and high temperatures, i.e. close to the exhaust line.
The fuel lines must be secure at the connections using hose clips to prevent their slipping.
8.4 Fuel Metering Pump
The fuel metering pump is a combined delivery, metering and shut-off system and is subject to certain installation criteria (see Figures 24 and 25).
IMPORTANT!
Cut lines without burr and do not crush them. Do not cut fuel line with side cutting pliers!
8.3.1 Connecting two fuel lines with a coupler hose
The correct procedure for connecting fuel lines with hosing is shown in Figure 23. Ensure that there are no leaks.
Correct
Clamp
Wrong
Bubble
Figure 23: Fuel line / coupler hose connection
Bubble
Figure 24: Fuel metering pump DP2 - installation position
12 V and 24 V – Diesel Only (with damper)
Horizontal Only!
Figure 25: Fuel metering pump 30.2 - installation position
8.4.1 Installation Location
It is advisable to install the metering pump in a cool place. The maximum ambient temperature must not exceed +20 °C (68 °F) for gasoline heaters at any time during operation.
The metering pump and fuel lines must not be installed within range of the radiated heat from hot vehicle parts. A heat shield must be used if necessary.
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Page 22
Fuel Supply Thermo 90 ST
8.4.2 Attachment
The metering pump must be secured with a vibration­damping mounting. Its installation position is limited as shown in Figure 24 and 25 in order to ensure effective automatic bleeding.
As a result of the risk of corrosion, only genuine Webasto parts may be used for the plug connections between the metering pump and the metering pump wiring harness.
8.5 Fuel Filter
Only a Webasto filter is allowed to be used if the fuel is expected to be contaminated. Install vertically if possible, however at least horizontally (check flow direction).
IMPORTANT!
Do not substitute the Webasto supplied fuel filter with a non Webasto replacement. Irregular heater operation may result.
Figure 26: Fuel filter
0° - 90°
A
Ø 5mm
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Page 23
Thermo 90 ST Combustion Air Supply
9. Combustion Air Supply
Under no circumstances may the combustion air be taken from areas occupied by people. The combustion air intake opening must not point in the direction of travel. It must be located in that it cannot become clogged with dirt or snow and cannot suck in splashing water.
IMPORTANT!
The combustion air must be extracted using a combustion air line from a position that is as cool as possible and protected from
splashing water.
The combustion air intake line (internal diameter at least 30 mm) may be 0.5 m to 5 m (1.6 ft to 16 ft) long with several bends totalling 360°. The minimum bending radius is 45 mm (1.75 inches).
The combustion air intake must not be routed above the exhaust outlet.
IMPORTANT!
If the combustion air intake line cannot be installed so that it slopes downwards, a water drain hole with a diameter of 4 mm
(5/32”) is to be made at its lowest point.
If the heater is installed in a general installation space near the vehicle’s fuel tank, the combustion air must be taken in from the outside and the exhaust fumes discharged into the atmosphere. The openings must be splash-proof.
A ventilation opening measuring at least 6 cm² (1 inch²) is required if the heater is installed in an enclosed box. The size of the ventilation opening must be increased accordingly if the temperature in the box exceeds the permitted ambient temperature of the heater (see Technical data).
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Page 24
Exhaust System Thermo 90 ST
10. Exhaust System
The exhaust pipe (internal diameter 38 mm) can be installed with a length of 0.5 m to 5 m (1.6 ft to 16 ft) and several bends totalling a maximum of 360° altogether. The minimum bending radius is 85 mm (3.35 inches).
The exhaust muffler is essential and must be installed near the heater.
The opening of the exhaust pipe must not point towards the front of the vehicle (see Figure 28).
The exhaust pipe opening must be located so that it cannot become clogged with snow and mud.
Rigid pipes of unalloyed or alloyed steel with a minimum wall thickness of 1.0 mm or flexible piping of alloyed steel only must be used as exhaust line. The exhaust pipe is secured to the muffler using an approved muffler clamp. See Figure 28 for details. See the statutory regulations for other requirements.
Heater removed for clarity of illustration
B
C
AA
Figure 27: Exhaust muffler installation - enclosure kit only
A. Muffler B. coupler (between heater and muffler) C. “L” bracket
The exhaust muffler is essential and must be installed near the heater. The exhaust muffler is secured to the heater using a coupler between the heater and muffler and a bracket fastened to the underside of the enclosure. See Figure 27 for details.
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Page 25
Thermo 90 ST Exhaust System
The exhaust pipe must be securely attached no further than 150 mm (6 in.) from the end of the exhaust pipe to ensure that the angle of 90° ± 10° verticle-down is maintained.
10°
10°
Discharge direction almost vertical 90° ± 10°
Figure 28: Exhaust pipe termination
IMPORTANT!
If the exhaust line cannot be installed so that it slopes downwards at all points, a water drain hole with a diameter of 4 mm (5/32”) is to be made at its lowest point to allow condensate to drain.
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Page 26
Electrical Connections Thermo 90 ST
11. Electrical Connections
11.1 Power / Control Harness Connections
Ideally, the heater power supply should be directly from the vehicle’s batteries or main buss-bar.
The heater control unit is equipped with low voltage protection. It is imperative that the vehicle batteries be kept in good condition for optimal heater operation.
For sleeper and engine heating applications, Webasto recommends a four battery system for best results.
A weather sealed fuse holder is to be fitted to protect the heater (supplied with the power / control harness).
1
1. Switch / Timer Harness
2. Heater Harness (Pre-installed)
3. Main Harness Connector
4. Power Supply Harness
5. Blower Interface Connector (3-pin)
4
2
5
3
Main Fuse
+
+
+
Vehicle System Power
+
To Heater Control Unit
Figure 29: Power and control harness assembly
A. Route item 1 into the vehicle cab in the area where the switch or timer is to be installed. B. Route item 4 to vehicle battery box and connect to batteries as shown in Figure 29. Brown wire to ground, red wire with fuse
holder to positive. Ensure battery connections are clean and protected with an anti-corrosive compound.
C. Item 3 (main connector) should be left unconnected until all electrical components are installed and heater is ready for the
initial start-up.
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Frame Ground
Page 27
Thermo 90 ST Electrical Connections
11.2 Connecting the Controls
The heater can be switched on and off using the following Webasto controls:
• Switch, see circuit diagrams in Figures 30 and 32.
• Timer, see circuit diagrams in Figures 31 and 33.
Heater Control Harness Connection
Figure 30: Toggle switch
X3
1
2
4
3
1 2
5 6
(MATING END SHOWN)
Using a 12 or 24 Volt Switch
1. White (Ground)
2. Red (Power)
3. Black (On signal)
4. Green (Operation indication)
CONNECTOR X1
3 4
7 8
Heater Control Harness Connection Using 1531 Comfort Timer
1. Red (Power)
2. Not Used
3. Green (Operation indication)
4. Optional (Dash lights)
5. White (Ground)
6. Black (On signal)
Connector X2 (Violet)
For truck operation, connect to red jumper of heater control harness.
For Coach, Transit and School Bus operation, connect to ignition source.
Figure 31: 7-Day, 3 Program Comfort Timer model 1531
All the cables and wires that are not required must be insulated against accidental
CAUTION
shorting or grounding.
X1
X2
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Page 28
Circuit Diagrams Thermo 90 ST
12. Circuit Diagrams
12.1 Thermo 90 ST Circuit Diagram Legend
c Digital timer P2:
Connection X14 to Red jumper of switch harness results in continuous operation with immediate heating (recommended for trucks requiring sleeper heating)
Connection X14 to vehicle ignition connection results in variable heating duration that can be programmed (10 min. to 120 min.); default setting 120 min. when ignition key is switched off. (Recommended for School bus, Coach and Transit vehicles.)
d Optional connection to vehicle instrumentation
panel lighting circuit.
The following Table applies to Figures 32 and 33.
Item Designation Comment
A1 Heater
A2 Control module
B1 Flame sensor
B2 Temperature sensor
B3 Temperature limiter/
Overheating guard
B4 Room thermostat
BT Battery Vehicle battery
DS Illuminated toggle Operating indicator (in item S1)
E Glow plug
F1 Fuse 10 A ATM mini flat fuse
F2 Fuse 5 A ATM mini flat fuse
F3 Fuse 20 A ATM mini flat fuse
H1 “Heating” symbol in the
display
H3 Symbol light Light (in item P2)
H6 Red LED Immediate heat button light,
K1 Relay Vehicle fan interface harness
M1 Motor Combustion air fan
M2 Motor Circulating pump
P2 Digital timer 1531 For programmed operation
S1 Toggle switch ON/OFF
X1 Plug connector, 4-pin To item A2
X2 Plug connector, 2-pin To item A2
X3 Plug connector, 2-pin To item A2
X4 Plug connector, 2-pin To item A2
X5 Plug connector, 2-pin To item A2
X6 Plug connector, 2-pin To item A2
X7 Plug connector, 2-pin To item A2
X8 12-pin plug connection To item A2
X9 12-pin plug connection To item P2
X10 Plug connector, 2-pin W-Bus Diagnostics
X11 Plug connector, 2-pin To Y1
X12 9-pin plug connection Power/Control Harness
X13 Plug connector, 8-pin To X9 of item P2
X14 Plug connector, 1-pin
X15 Plug connector, 3-pin To optional blower interface
X16 5-pin relay socket Vehicle fan interface harness
Y1 Metering pump Fuel pump for heater
Operating indicator (in item P2)
ready indicator, switch-on control (in item P2)
option
To pin-10 of item X9 (see
systems (Sleeper Pak™)
option
c)
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Page 29
Thermo 90 ST Circuit Diagrams
X11
A2
12
11
2
122224 1
Brown
12
Blue
Green
Orange
Orange
Gray
Violet/Blue
VioletViolet
Green
Green
Gray
Gray
Violet
Y1
A1
B2
B1
B3
White/Blue
Blue
Black
Brown
Red
Yellow
12568
21
X2 X4 X1 X5 X6 X7 X3
4
10
11
3
1
9
12
7
X8
Gray
Brown
Red Red Red White Red
Red/Black
Red
E
RedRed
Red
F
Red
Brown
Brown
GHJ
Brown
Brown
Brown
White
F5
Brown
BT
WhiteWhite
Black
Violet
Brown
X10
Yellow/Red
1
2
F3
F2
CDE F B
F1
A
White
Violet
White
Brown
White
Black
Green
ABC
X15
Black
Green
85
Green
White
White
87
Black
87a
1
1
0
0
B4
5
1
3
2
4
Black
BDC
X12
Black
Violet
Green
Red
A
Red
Red
Brown
M2
Blue
Black
MM
M1
Brown
Brown
E
Yellow
M2
A
B
X15
X12
1 2
X11
X10
X8
X4/X5/X6/X7
2
1
2
X3
C
1 2
1
2
1
3
5
7
9
11
1
K1
30
86
Optional Blower Interface Harness P/N 905613B
White
12V +
X16
Black
GND
DS
White
Black
S1
X2
1
EB2 B3
M1
B1
X1
2
1
4
3
2
Figure 32: Thermo 90 ST with On/Off switch - connection diagram (Includes optional blower interface harness)
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Page 30
Circuit Diagrams Thermo 90 ST
X15
X13
4
3
2
1
X12
X11
X10
X9
X8
X4/X5/X6/X7
X3
X2
X1
1 2
A
C
B
8
7
6
5
1 2
A2
12
11
2
122224 1
21
X2 X4 X1 X5 X6 X7 X3
4
1
2
5
6
8
10
11
3
1
9
12
7
X11
Brown
12
Blue
Green
Orange
Orange
Gray
Violet/Blue
VioletViolet
White/Blue
Blue
Black
Brown
Red
Yellow
Y1
Green
Green
Gray
Gray
Violet
Brown
Blue
Black
Brown
Brown
Yellow
A1
B2
B1
B3
M2
MM
M1
E
X8
1
2
Yellow/Red
1
2
X10
12
9
6
3
1
3
5
7
9
11
1
2
1
2
Violet
ABC
X15
Brown
White
Violet
Black
BDC
X12
Black
Black
Violet
WhiteWhite
Green
Brown
F3
Red
Red
Red
F2
CDE F
White
B
F1
Red
A
White
Red
Red
A
EFGHJ
RedRed
Red
F5
c
Red
Red
Red/Black
Brown
Brown
Brown
Brown
Brown
Brown
Gray
Brown
White
BT
Black
1
2
1
4
3
2
X14
c
X13
Violet
634
Black
Gray
Red
Yellow
d
1
Red
White
2
7
5
8
Brown
Brown
M2
EB2 B3
B1
M1
Figure 33: Thermo 90 ST with 7-day digital timer model 1531 - connection diagram
Webasto Product N.A., Inc. 28 www.techwebasto.com
2
11
8
H6
4
H1
101
P2
X9
7
12
H3
Page 31
Thermo 90 ST Initial Start-up
13. Initial Start-up
IMPORTANT!
Refer to the safety instructions in the operating and maintenance instructions. The operating and maintenance instructions must be read through without
fail before starting the heater.
NOTE:
As a result of the low fuel consumption the heater must be switched on several times to fill the fuel line and prime the system.
After you have installed the heater, bleed the water system and the fuel supply system carefully. Follow the instructions supplied by the vehicle manufacturer for this purpose.
Conduct a trial of the heater to check all the water and fuel connections for leaks and to ensure that they are secure. If the heater suffers a fault during operation, the fault must be located and remedied.
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Page 32
Troubleshooting Thermo 90 ST
14. Troubleshooting
14.1 General Information
The control unit continuously monitors the heater operation. The control unit identifies errors on individual heater components and faults during operation. Should the control unit experience component errors and operational faults, the heater will be shut down.
14.2 Fault Lock-out
Fuel is supplied for max. 240 seconds if the flame does not start to burn.
Fuel is supplied for max. 240 seconds if the flame goes out during operation.
The fuel supply is shut off if the system overheats (temperature limiter is tripped). If the system overheats the button on the temperature limiter must be reset.
Once the cause of the fault has been eliminated, the fault lock-out is cancelled by switching the heater off and on again.
If the under-voltage protection switches off the system
Thermo 90 ST
12 Volt 10.V – 0.5V
14.3 Diagnostic after a Fault Lock-out for the Thermo 90 ST
Check the fuses and plug connectors.
14.3.1 Version with switch
If the system is operated with a switch, the nature of the fault is indicated by a flashing code on an indicator light (toggle of switch) during the run-on time of the heater.
After five short signals, count the long flashes:
1x No start (after 2 attempts to start)
2x Flame failure
3x Under-voltage or over-voltage
4x Premature flame recognition
5x Flame sensor interrupt or flame sensor short-circuit
6x Temperature sensor interrupt or temperature sensor
short-circuit
7x Metering pump interrupt or metering pump short-
circuit
8x Blower motor interrupt or blower motor short-
circuit or blower motor incorrect speed
9x Glow plug interrupt or glow plug short-circuit
10x Overheating
11x Circulating pump interrupt or circulating pump
short-circuit
24 Volt 21V – 1V
for longer than 20 seconds, the fuel supply is interrupted.
14.3.2 Version with timer
If the system is equipped with a digital timer, a fault message appears on the display of the timer after a fault occurs:
F 01 No start (after 2 attempts to start)
F 02 Flame failure
F 03 Under-voltage or over-voltage
F 04 Premature flame recognition
F 05 Flame sensor interrupt or flame sensor short-
circuit
F 06 Temperature sensor interrupt or temperature
sensor short-circuit
F 07 Metering pump interrupt or metering pump
short-circuit
F 08 Blower motor interrupt or blower motor short-
circuit or blower motor incorrect speed
F 09 Glow plug interrupt or glow plug short-circuit
F 10 Overheating
F 11 Circulating pump interrupt or circulating pump
short-circuit
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Page 33
Thermo 90 ST Technical Data
15. Technical Data
Except where limit values are specified, the technical data refer to the usual heater tolerances of ambient temperature of +20 °C (68 °F) and at the
nominal voltage and conditions.
±10% at an
15.3 Fuel for Thermo 90 ST (Diesel):
The diesel fuel specified by the vehicle manufacturer must be used. Heating oil may also be used as long as it complies to the normal quality available on the North American market.
We know of no negative influences due to additives.
15.1 Electrical Components:
If fuel is extracted from the vehicle’s tank, follow the
additive instructions issued by the vehicle manufacturer. The control module, motors for combustion air blower and circulating pump, ceramic glow pin, metering pump, switch and timer are designed for either 12 V or 24 V.
The temperature limiter, temperature sensor and flame sensor are identical on 12V and 24V heaters.
If you change to low-temperature fuel, the heater must
be operated for approximately 15 minutes so that the
fuel system is filled with the new fuel.
The Thermo 90 ST heater is also licensed for use with
PME (bio-diesel), which complies with DIN EN 14214.
15.2 Fuel for Thermo 90 ST (Gasoline):
The fuel specified by the vehicle manufacturer must be used. Both leaded and unleaded fuel may be used.
Heater Operation Thermo 90 ST Gasoline Thermo 90 ST Diesel
EC licensing symbol e1*2001/56*0019*__ e1*2001/56*0019*__
Model Water heater with Ferro-tec technology
Heat output Max.
Fuel Gasoline Diesel
Fuel consumption Max.
Rated voltage 12 V 12 or 24 V
Operating voltage range 10 ... 15 V 10 ... 15 or 20 ... 30 V
Nominal power consumption with circulation pump (without vehicle fan)
Max. ambient temperature: Heater: - Operation -40° ... +110 °C (90 °C with control module installed on the heater)
- Storage -40° ... +110 °C (90 °C with control module installed on the heater)
Control module: - Operation -40° ... +75 °C -40° ... +85 °C
- Storage -40° ... +85 °C
Metering pump: - Operation -40° ... +20 °C -40° ... +40 °C
- Storage -40° ... +85 °C
Max. operating pressure (heat medium) Max. 2.0 bar
Capacity of the heat exchanger 0.15 l
Max. combustion air intake temperature +40 °C
Minimum capacity of the system 6.00 l
Coolant pump delivery rate against 0.15 bar 1650 l/h
CO
in the exhaust gases
2
(normal function range)
- adjustment values at approx. + 20 °C
CO
2
and geographic altitude above sea level
Heater dimensions (tolerance ± 3 mm) * Control module installed on the heater
Weight 4,8 kg
regulating range 2.0 kW – 7.6 kW
regulating range 0.25 l/h – 1.0 l/h
Max. regulating range 37 W - 83 W
Max. 10 ... 12.0% by volume
Max. 0 m 500 m 1000 m
10% 10.6% 11.3%
L 307 (352*) mm
W 131 mm
H 232 mm
Table 1: Technical Data - Metric Measurement
9.1 kW
1.8 kW – 7.6 kW
1.1 l/h
0.19 l/h – 0.9 l/h
90 W
37 W - 83 W
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Page 34
Technical Data Thermo 90 ST
Heater Operation Thermo 90 ST Gasoline Thermo 90 ST Diesel
EC licensing symbol e1*2001/56*0019*__ e1*2001/56*0019*__
Model Water heater with Ferro-tec technology
Heat output Max.
Fuel Gasoline Diesel
Fuel consumption Max.
Rated voltage 12 V 12 or 24 V
Operating voltage range 10 ... 15 V 10 ... 15 or 20 ... 30 V
Nominal power consumption with circulation pump (without vehicle fan)
Max. ambient temperature: Heater: - Operation -40° ... +230 °F (194 °F with control module installed on the heater)
- Storage -40° ... +230 °F (194 °F with control module installed on the heater)
Control module: - Operation -40° ... +167 °F -40° ... +185 °F
- Storage -40° ... +185 °F
Metering pump: - Operation -40° ... +68 °F -40° ... +104 °F
- Storage -40° ... +185 °F
Max. operating pressure (heat medium) Max. 29.0 PSI
Capacity of the heat exchanger 0.158 quart
Max. combustion air intake temperature +104 °F
Minimum capacity of the system 6.34 quarts
Coolant pump delivery rate against 2.17 PSI 435.8 Gal/hr
CO
in the exhaust gases
2
(normal function range)
- adjustment values at approx. + 68 °F
CO
2
and geographic altitude above sea level
Heater dimensions (tolerance ± 0.118 in.) * Control module installed on the heater
Weight 10.58 lb.
regulating range 3830 BTU/hr – 26000 BTU/hr
regulating range 0.066 Gal/hr – 0.264 Gal/hr
Max. regulating range 37 W - 83 W
Max. 10 ... 12.0% by volume
Max. 0 ft 1640.5 ft 3280.8 ft
10% 10.6% 11.3%
L 12.08 (13.85*) inch
W 5.157 inch
H 9.13 inch
Table 2: Technical Data - US Standard Measurement
31000 BTU/hr
6100 BTU/hr – 26000 BTU/hr
0.29 Gal/hr
0.05 Gal/hr – 0.0237 Gal/hr
90 W
37 W - 83 W
24 V
XXXXXXX_.XXXXX
Figure 34: Thermo 90 ST control module, arbitrary
installation position
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Page 35
Thermo 90 ST Technical Data
Thermo 90 ST
ø5
92
152
12
ø30
1 Combustion air intake
2 Exhaust outlet
3 Fuel inlet pipe
4 Coolant inlet
5 Coolant outlet
137
ø20
5
ø39
88
95
45
99
89
3
4
ø20
ø38
49
99
352
==
381
100
ø74
131
Figure 35: Dimensions of the Thermo 90 ST Heater
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Page 36
Additional Installation Accessories Thermo 90 ST
16. Additional Installation Accessories
Sleeper Pack - complete auxiliary heat exchanger kit.
P/N 905670
Sleeper Pack - OEM HVAC to Webasto Coolant Heater Interface Kits.
P/N 906558A - Kenworth AeroCab built after September 1996
P/N 906668 - Kenworth Studio Sleeper built after September 1996
P/N 906582 - Peterbilt with Unibilt Sleepers except model 387
P/N 906543 - Freightliner Century Class, Freightliner Classic-FLD, Kenworth Modular Sleeper Box, Kenworth T-2000, Kenworth AeroCab and Studio Sleeper built before September 1996, Mack CL, CH, Vision, Peterbilt model 387, Sterling - all, Volvo VN, WIA, Western Star - all.
Call your Webasto representative for information or questions regarding “Sleeper Pack” systems.
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Page 37
Thermo 90 ST Notes
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Page 38
Notes Thermo 90 ST
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Page 39
Thermo 90 ST Notes
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Page 40
Org. 01/2007 Rev. 05/2007 P/N 5000994A © 2007 Webasto Product N.A., Inc.
Webasto Product N.A., Inc.
15083 North Road Fenton, MI 48430
Technical Assistance Hotline USA: (800) 860-7866 Canada: (800) 667-8900
www.techwebasto.com www.webasto.us
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