Webasto Water Heater Unit Installation Instructions

Important Safety Information

⚠️ WARNING! Hazard warning: Incorrect installation or repair of Webasto heating systems may cause a fire or result in the emission of carbon monoxide, which can be fatal. Serious or fatal injuries can be caused as a result.

Specialist company training, technical documentation, specialized tools and equipment are required to install and repair Webasto heating and cooling systems.

NEVER attempt to install or repair Webasto heating or cooling systems if you have not successfully completed the company training and thereby acquired the required technical skills, or if you do not have access to the required technical documentation, tools and equipment needed to carry out correct installation and repairs.

ALWAYS follow all Webasto installation and repair instructions and observe all warnings.

Webasto does not accept any liability for defects and damage that are attributable to installation by untrained staff.

Document Identification: Ident. No.:9014070C_EN

Document Overview and Validity

Table of Contents

• Validity
• Heater Unit/Installation Kit
• Foreword
• General Instructions
• Special Tools
• Explanatory Notes on Document
• Preliminary Work
• Heater unit installation location
• Electrical system
• Installing K3 relay and fuse holder
• Climatic fan controller
• Climatronic fan controller
• Remote option (Telestart)
• Preparing combustion air
• Premounting exhaust system
• Preparing installation location
• Installing heater unit
• Fuel
• Coolant on 1.4 MPI
• Coolant on 1.6 FSI
• Coolant on 1.8 TFSI
• Exhaust gas
• Final Work
• Operating Instructions for End Customer

Validity

Vehicle and engine types, equipment variants and national specifications not listed in these installation instructions have not been tested. However, installation according to these installation instructions may be possible.

The installation location of a digital timer and summer/winter switch should be confirmed with the end customer before installation.

Installation Kit and Heater Unit Recommendations

Heater Unit/Installation Kit

In addition to the installation kit for the 1.4 MPI/1.6 FSI, the following will also be required for the 1.8 TFSI:

Also required with Climatronic:

Heater Unit Recommendations by Vehicle Class:

The selection of the heater unit is based on the passenger compartment size of the vehicle and the level of comfort required by the customer!

Foreword and General Instructions

These installation instructions apply to Skoda Octavia 1.4 MPI / 1.6 FSI / 1.8 TFSI vehicles - for validity, see page 2 - from model year 2004 and later, assuming technical modifications to the vehicle do not affect installation, any liability claims excluded. Depending on the vehicle version and equipment, modifications may be necessary during installation with respect to these installation instructions.

However, the stipulations in the "installation instructions" and "operating and maintenance instructions" for the Thermo Top C/P/E must always be observed. The corresponding rules of technology and any information from the vehicle manufacturer should be observed during the installation work.

General Instructions:

• Installation should be carried out according to the general, standard rules of technology.
• Unless specified otherwise, fasten hoses, lines and wiring harnesses to original vehicle lines and wiring harnesses using cable ties.
• Sharp edges should be fitted with edge protectors (split-open plastic hose).
• Spray unfinished body areas, e.g. drilled holes, with anti-corrosion wax (Tectyl 100K, Order No. 111329).

Special Tools:

• Torque wrench for 2.0 - 10 Nm
• Hose clamping pliers
• Metric thread-setter kit

Document Symbols and Explanations

To provide you with a quick overview of the individual working steps, you will find an identification mark on the outside top right corner of the page in question.

System Areas:

• Mechanical system ?
• Electrical system ⚡
• Coolant ?
• Fuel ⛽
• Exhaust gas ?
• Combustion air ?️

Special features are highlighted using the following symbols:

• ⚠️ Specific risk of injury or fatal accidents.
• ❗ Specific risk of damage to components.
• ? Specific risk of fire or explosion.
• ℹ️ Reference to general installation instructions of Webasto components or to the manufacturer's vehicle-specific documents.
• ⭐ Reference to a special technical feature.

? The arrow in the vehicle icon indicates the position on the vehicle and the viewing angle.

All dimensions are in mm!

Tightening torque of hose clamps = 2.0 + 0.5 Nm!

Tightening torque of Ejot screws, Ejot studs = 10 Nm!

Preliminary Work

⚠️ WARNING!

• Open fuel tank cap, ventilate tank.
• Close the tank cap again.
• Depressurize the cooling system.
• Copy the factory number from the original type label to the duplicate type label.
• Remove years that do not apply from the duplicate label.
• Attach the duplicate label (type label) in the appropriate place.
• Disconnect and remove the battery.
• Remove the battery carrier.
• Remove the engine cover.
• Remove the left front wheel.
• Remove the front section of the left front wheel well trim.
• Remove the left-hand front fog light or, on vehicles without front fog lights, the left-hand cover.
• Remove the underride protection.
• Remove the right-hand underbody trim.
• Remove the rear bench seat
• Open the right-hand fuel sender service lid.
• Remove the footwell trim on the driver's side.
• Remove the lower instrument panel trim on the driver's side
• Remove the footwell trim on the front passenger side (only on vehicles with Climatronic)
• Remove page 36 "Operating Instructions for End Customer" and add to the vehicle operating instructions.

Heater unit installation location

? [Image description: Shows the location where the heater unit is to be installed in the vehicle.]

1 Heater unit

Electrical System Installation

Fuse holder, relay K3

Route wiring harnesses of fan controller, digital timer and metering pump 3 in cable duct to firewall. Information on installing K3 relay 1 and fuse holder 2 on following page.

Digital timer and summer/winter switch option

1 Summer/winter switch, drilled hole 12 mm dia. 2 Digital timer.

? [Image description: Shows the dashboard area where the digital timer and summer/winter switch are installed.]

ℹ️ Do not install the metering pump cable harness until later together with fuel pipe along the original vehicle fuel lines on the underbody.

Wiring harness installation diagram:

⚡ [Diagram description: Shows the electrical connections for the fan controller, digital timer, and metering pump, including routing through the firewall.]

Wiring harness pass through in engine compartment:

1 Protective rubber plug, 2 Wiring harness of fan controller and digital timer.

? [Image description: Shows the engine compartment side where wiring harnesses pass through.]

Wiring harness pass through of passenger compartment:

1 Wiring harness of fan controller, 2 Protective rubber plug, 3 Wiring harness of digital timer.

? [Image description: Shows the passenger compartment side where wiring harnesses pass through.]

Installing K3 Relay and Fuse Holder

? [Image description: Shows the fuse/relay carrier in the engine compartment.]

1 Cover of fuse/relay carrier in engine compartment, 2 Cut away bar in shaded area, 3 Countersink 5 mm dia. hole [2x] from behind.

1 M5x12 countersunk head screw [2x].

? [Image description: Shows the fuse holder assembly.]

With Climatronic, replace F3 25 A fuse with 3 A fuse!

Insert 5 mm dia. large diameter washer between cover and retaining plate of fuse holder.

1 Large diameter washer, retaining plate of fuse holder, M5 flanged nut, 2 M5 flanged nut, 3 Relay K3, 4 Fuse holder.

? [Image description: Shows the installed fuse holder and relay.]

Route brown (br) ground wire to original vehicle ground support point below headlight and connect.

1 Fuse/relay carrier, 2 Original vehicle positive support point, 3 Red (rt) positive wire.

Climatic Fan Controller Wiring

⚡ [Diagram description: Wiring diagram for the Climatic fan controller, showing connections between Webasto components (Heater unit, Fan relay) and Skoda components (Fan fuse, Air-conditioning control unit, Heater switch, Resistor group, Fan motor).]

Legend:

• rt: red, ws: white, sw: black, br: brown, gn: green, ge: yellow
• X: Cutting point
• Wiring colors may vary.

Connecting Central Electrical Box

? [Image description: Shows the central electrical box in the vehicle.]

Detach original vehicle fuse carrier 3 [instrument panel at upper left] and unlock contact lock 1. Detach black/yellow (sw/ge) wire, 4 mm² 2 on fuse output SC40.

? [Image description: Shows connections being made in the central electrical box.]

Produce connections as shown in wiring diagram. Lock contact lock following installation!

1 Black/yellow (sw/ge) wire with original standard power timer.

2 Insert red (rt) wire from K3/87a with crimped-on standard power timer in fuse output SC40.

3 Black (sw) wire K3/30 with crimped-on tab connector.

4 AMP connector.

Climatronic Fan Controller Wiring

⚡ [Diagram description: Wiring diagram for the Climatronic fan controller, showing connections between Webasto components (Heater unit, Fan relay, Pulse width modulator) and Skoda components (Fan fuse, Air-conditioning control unit, Fan motor, Fan control unit).]

IPCU adjustment values:

• Duty cycle: 30%
• Frequency: 400 Hz
• Voltage: 8 V
• Function: High-side

Legend:

• rt: red, ws: white, sw: black, br: brown, ge: yellow, gn: green, bl: blue
• ! Insulate wire ends and tie back.
• X: Cutting point
• Wiring colors may vary.

Connecting Central Electrical Box (Climatronic)

? [Image description: Shows the central electrical box with connections being made.]

Produce connections as shown in wiring diagram. Position of free sockets dependent on vehicle equipment.

1 Socket for IPCU, 2 Original vehicle M6 bolt, 3 Brown (br) wire of IPCU/85, 4 Wiring harness with red (rt) wire of IPCU/E and black/white (sw/ws) wire of IPCU/A, 5 Green/white (gn/ws) wire of IPCU/86, AMP housing.

? [Image description: Shows further connections in the central electrical box.]

Produce connections as shown in wiring diagram. Insulate red (rt) wire of K3/87a 4 and tie back. Insert IPCU 1 in socket.

2 AMP connector, 3 Black (sw) wire from K3/30.

Routing wiring harness of IPCU:

? [Image description: Shows routing of IPCU wiring harness along air duct.]

Route wiring harness IPCU 1 along air duct 2 to center console.

? [Image description: Shows routing of IPCU wiring harness to the fan unit.]

Route wiring harness of IPCU 1 to original vehicle wires to fan unit 2.

Connecting Fan Unit

? [Image description: Shows connection on the fan unit connector.]

Connection on connector T6t 3 of fan unit. Produce connections as shown in wiring diagram. Disconnect fan unit.

1 Red (rt) wire of IPCU/E, 2 Black/white (sw/ws) wire of A/C control unit, 5 Black/white (sw/ws) wire from IPCU/A, 4 Black/white (sw/ws) wire of connector T6t/2.

Fastening wiring harness:

? [Image description: Shows the fan unit being fastened again.]

Fasten fan unit again. Fasten wiring harness 1 on original vehicle wires with cable tie.

Remote Option (Telestart)

? [Image description: Shows installation of the Telestart receiver.]

If M6 screw 3 is not present, then use suitable M6 screw with spring lockwasher.

1 Receiver, 2 Bracket, lower hole drilled out to 6.5 mm dia.

? [Image description: Shows antenna installation.]

1 Antenna.

Preparing Combustion Air

1 Combustion air pipe, a = 250. Discard section X.

? [Diagram description: Shows cutting the combustion air pipe to length.]

1 Ejot stud.

? [Image description: Shows the heater unit being prepared.]

Insert one washer each between heater unit and bracket 5 at positions 2.

1 M6x30 spacer nut on Ejot stud, 2 Ejot screw, washer [2x each], 3 27 mm dia. clamp, 4 Combustion air pipe.

? [Image description: Shows further preparation of the heater unit.]

1 Ejot screw [2x], 2 Combustion air muffler, 3 Retaining clip in hole of heater unit, 4 Hose section, 10 mm dia. clamp [2x], 5 Fuel line, 6 Strut.

Premounting Exhaust System

1 Exhaust pipe, a = 190; 2 Exhaust end section, b = 240. Discard section X.

? [Diagram description: Shows cutting exhaust pipes to length.]

? [Image description: Shows sliding insulation onto the exhaust pipe.]

1 M6x16 bolt, spring lockwasher, 2 Premounted M6x30 spacer nut, 3 Exhaust pipe with insulation, 4 Red (rt) rubber isolator, 5 Hose clamp [2x], 6 Exhaust muffler.

? [Image description: Shows preassembly of the exhaust end section.]

1 Hose clamp, 2 Red (rt) rubber isolator, 3 Exhaust end section.

1 Exhaust end section.

? [Image description: Shows alignment of the exhaust end section.]

Preparing Installation Location

? [Image description: Shows preparing the installation location with edge protection.]

Slide one large diameter washer 1 each onto original vehicle stud bolt [3x] and secure against falling off with putty etc. 2 Edge protection.

Installing Heater Unit:

? [Image description: Shows the heater unit being installed.]

1 Large diameter washer, M8 flanged nut [3x each].

Aligning Exhaust System:

? [Image description: Shows exhaust system alignment relative to vehicle components.]

Ensure freedom of movement of exhaust system relative to adjacent components and lines.

1 Original vehicle wiring harnesses (secured with cable ties), 2 Horn, 3 Exhaust pipe with insulation.

? [Image description: Shows further exhaust system alignment.]

Ensure freedom of movement of exhaust system relative to adjacent components and lines. Position red (rt) rubber isolator 2 as shown. Picture shows vehicle with headlight washer system.

1 Headlight washer system, 3 Exhaust pipe with insulation, 4 Horn, 5 Horn bracket.

Connecting Wiring Harness of Heater Unit

? [Image description: Shows punching through a perforation for the heater unit wiring harness.]

Punch through perforation in heater unit lid at position 2.

1 Wiring harness of heater unit, 2 Clip-type cable tie, 3 Cable tie.

Fuel System Installation

CAUTION!

Open the vehicle's fuel tank cap, ventilate the tank and then re-close the tank lock. Catch any fuel running off with an appropriate container.

Install fuel line and metering-pump wiring harness so that they are protected against stone impact. Unless specified otherwise, always fasten using cable ties. Mount the fuel line and wiring harness with rub protection on sharp edges.

WARNING!

The fuel line and wiring harness are routed to the metering pump in as shown in the wiring harness routing diagram.

Installing Fuel Line:

? [Image description: Shows routing of the fuel line in the engine bay.]

1 Fuel line.

Installing Lines:

? [Image description: Shows fastening the fuel line and wiring harness.]

Fasten fuel line and wiring harness of metering pump 1 in coolant reservoir on original vehicle lines with cable ties. Pay particular attention to freedom of movement of wiper linkage.

? [Image description: Shows guiding the fuel line and wiring harness.]

Guide fuel line 2 and wiring harness of metering 3 into original vehicle line duct 3 and route to underbody.

Installing Lines and Metering Pump

Installing Lines:

? [Image description: Shows routing the fuel line and wiring harness to the fuel tank.]

Route fuel line and wiring harness of metering pump along original vehicle fuel lines 2 to fuel tank.

1 Line duct.

Installing Silent Block:

? [Image description: Shows installation of a silent block.]

1 Silent block, large diameter washer, M6 flanged nut.

2 Remove sealing plug.

Installing Metering Pump:

? [Image description: Shows the metering pump assembly.]

1 Fuel line, 2 Wiring harness of metering pump, connector mounted, 3 Metering pump, 4 Plug remounted, 5 Rubber-coated p-clamp, flanged nut on silent block, 6 Hose section, 10 mm dia. clamp [2x].

Removing Fuel:

? [Diagram description: Shows cutting a standpipe and molded hose to length.]

Cut standpipe 1 and 90° molded hose 2 to length.

Dimensions: 7.5 mm dia., 4.5 mm dia., 235.

Fuel System Connections

Premounting Fuel Standpipe:

? [Diagram description: Shows a standpipe and molded hose with clamp sizes.]

10 mm dia. Caillau clamp 2 in center between beads on end of standpipe.

1 Standpipe, 3 90° molded hose.

Cutting Off Blind Plug:

? [Image description: Shows the fuel tank sending unit with a blind plug.]

Cut 3 mm off blind plug 1.

2 Fuel-tank sending unit.

Connection to Fuel-Tank Sending Unit:

⚠️ Should the standpipe be slightly curved on delivery, then it must be aligned so that the end points toward the rear right. Otherwise there is a danger of the fuel gauge being impaired.

? [Image description: Shows connecting the fuel line to the sending unit.]

1 13.5 mm dia. Caillau clamp, 2 Preassembled molded hose with standpipe, 3 10 mm dia. Caillau clamp, 4 Fuel line.

Connecting Metering Pump:

? [Image description: Shows connecting the metering pump.]

1 Hose section, 10 mm dia. clamp [2x], 2 Fuel line.

Coolant System Installation (1.4 MPI)

⚠️ WARNING! Any coolant running off should be collected using an appropriate container. Install hoses so that they are kink-free. Unless specified otherwise, always fasten using cable ties. Position clamps so that no other hose can be damaged! When installing the coolant hose, the heater unit must be filled with coolant.

The connection should be "inline" based on the following diagram:

? [Diagram description: Coolant routing diagram for 1.4 MPI engine, showing connections between heater unit, engine outlet, and heat exchanger inlet.]

All spring clips without a specific designation = 27 mm dia. 1 = Original vehicle spring clip.

All connecting pipes = 20x20 mm dia. All hose clamps = 20-27 mm dia.!

Preparing Coolant Hoses (1.4 MPI)

? [Diagram description: Shows cutting coolant hoses to length with dimensions a=670, b=120, c=770. Discard section X.]

? [Image description: Shows pushing braided protection hoses onto prepared coolant hoses.]

Push braided protection hoses onto hose A and C and cut to length. Cut heat shrink plastic tubing to length.

1 25 mm long heat shrink plastic tubing [4x].

? [Image description: Shows premounted coolant hoses.]

1 Black (sw) rubber isolator.

Cutting Point:

? [Image description: Shows pulling off a hose on the engine outlet/heat exchanger inlet.]

Pull off hose on engine outlet/heat exchanger inlet 1 on connection piece of engine outlet 2. Spring clip 3 will be reused. Install battery carrier.

Connecting Coolant System (1.4 MPI)

? [Image description: Shows connecting the hose to the heat exchanger inlet.]

1 Hose on heat exchanger inlet.

? [Image description: Shows routing the coolant hose in the engine compartment.]

? [Image description: Shows connecting the heater unit.]

? [Image description: Shows further routing in the engine compartment.]

Fastening Coolant Hoses (1.4 MPI)

? [Image description: Shows fastening a hose with a double clip.]

1 27x6 double clip on hose A and brake line from brake master cylinder.

2 Original vehicle spring clip.

? [Image description: Shows fastening hoses with a p-clamp.]

Ensure sufficient distance to neighboring components.

1 M6x20 screw, spring lockwasher on existing thread.

2 29 mm dia. rubber-coated p-clamp [2x].

Coolant System Installation (1.6 FSI)

⚠️ WARNING! Any coolant running off should be collected using an appropriate container. Install hoses so that they are kink-free. Unless specified otherwise, always fasten using cable ties. Position clamps so that no other hose can be damaged! When installing the coolant hose, the heater unit must be filled with coolant.

The connection should be "inline" based on the following diagram:

? [Diagram description: Coolant routing diagram for 1.6 FSI engine, showing connections between heater unit, engine outlet, and heat exchanger inlet.]

All spring clips without a specific designation = 27 mm dia. 1 = Original vehicle spring clip.

All hose clamps = 20-27 mm dia.! Connecting pipe = 20x20 mm dia. 2 = Black (sw) rubber isolator.

Preparing Coolant Hoses (1.6 FSI)

? [Diagram description: Shows cutting coolant hoses to length with dimensions a=1000, b=1050. Discard section X.]

? [Image description: Shows pushing braided protection hoses onto prepared coolant hoses.]

Push braided protection hoses onto hose A and B and cut to length. Cut heat shrink plastic tubing to length.

1 25 mm long heat shrink plastic tubing [4x].

? [Image description: Shows premounted coolant hoses.]

1 Black (sw) rubber isolator.

Cutting Point:

? [Image description: Shows pulling off a hose on the engine outlet/heat exchanger inlet.]

Pull off hose on engine outlet/heat exchanger inlet 3 on connection piece of heat exchanger inlet 2. Spring clip 1 will be reused. Install battery carrier.

Connecting Coolant System (1.6 FSI)

? [Image description: Shows connecting the hose to the heat exchanger inlet.]

1 Original vehicle spring clip.

? [Image description: Shows routing the coolant hose in the engine compartment.]

? [Image description: Shows connecting the heater unit.]

? [Image description: Shows further routing in the engine compartment.]

Connecting Engine Outlet (1.6 FSI)

? [Image description: Shows connecting the hose to the engine outlet.]

1 Hose of engine outlet.

2 Align rubber isolator.

? [Image description: Shows fastening hoses with a p-clamp.]

Ensure sufficient distance to neighboring components.

1 M6x20 screw, spring lockwasher on existing thread.

2 29 mm dia. rubber-coated p-clamp [2x].

? [Image description: Shows fastening with a double clip.]

1 27x6 mm double clip [2x] (on hose A and brake line from brake master cylinder).

Coolant System Installation (1.8 TFSI)

⚠️ WARNING! Any coolant running off should be collected using an appropriate container. Install hoses so that they are kink-free. Unless specified otherwise, always fasten using cable ties. Position clamps so that no other hose can be damaged! When installing the coolant hose, the heater unit must be filled with coolant.

The connection should be "inline" based on the following diagram:

? [Diagram description: Coolant routing diagram for 1.8 TFSI engine, showing connections between heater unit, engine outlet, and heat exchanger inlet.]

All spring clips without a specific designation = 27 mm dia. All connecting pipes = 20x20 mm dia.

All hose clamps without a specific designation = 20-27 mm dia.

Preparing Coolant Hoses (1.8 TFSI)

? [Diagram description: Shows cutting coolant hoses to length with dimensions a=700, b=70, c=710. Discard section X.]

? [Image description: Shows pushing braided protection hoses onto prepared coolant hoses.]

Push braided protection hoses onto hose A and B and cut to length. Cut heat shrink plastic tubing to length.

1 25 mm long heat shrink plastic tubing [4x].

? [Image description: Shows premounted coolant hoses.]

1 Black (sw) rubber isolator.

Installing bracket and clip-type cable tie:

? [Image description: Shows drilling a hole and installing a bracket and cable ties.]

Drill 6 mm dia. hole in cover of cable duct 2 at position 3. Watch lines located behind duct when drilling!

1 M6x12 bolt, flanged nut on existing hole, 3 6 mm dia. hole, clip-type cable tie, 4 Clip-type cable tie [2x] in hole of bracket, 5 Bracket.

Prepare Battery Carrier and Connect Coolant System (1.8 TFSI)

Prepare Battery Carrier:

? [Image description: Shows mounting an angle bracket.]

1 Angle bracket.

2 Mount M6x20 bolt, flanged nut in existing hole.

Cutting Point:

? [Image description: Shows cutting a hose on the engine outlet/heat exchanger inlet.]

Cut off hose on engine outlet/heat exchanger inlet at marking. Install battery carrier.

1 Hose section of heat exchanger inlet, 2 Engine outlet hose section.

Connecting Heat Exchanger Inlet:

? [Image description: Shows connecting the hose to the heat exchanger inlet.]

1 Hose on heat exchanger inlet.

2 M6x20 bolt, pin lock.

3 29 mm dia. rubber-coated p-clamp.

Routing in Engine Compartment:

? [Image description: Shows routing hose C through a p-clamp.]

Route hose C through rubber-coated p-clamp 1.

Routing and Connecting Coolant Hoses (1.8 TFSI)

Routing in Engine Compartment:

? [Image description: Shows fastening hose C with cable ties.]

Fasten hose C on clip-type cable tie 1 [2x]!!

? [Image description: Shows routing hose A along hose C.]

Route hose A along hose C.

1 Cable tie.

Connecting Engine Outlet:

? [Image description: Shows the hose of the engine outlet.]

1 Hose of engine outlet.

Fastening Coolant Hoses (1.8 TFSI)

? [Image description: Shows fastening hose A with a clip-type cable tie.]

Fasten hose A on clip-type cable tie 3!! Ensure sufficient distance to neighboring components.

1 Spacer bracket, 2 Flanged nut on M6x20 bolt, 4 29 mm dia. rubber-coated p-clamp.

Exhaust Gas

? [Image description: Shows the exhaust end section installed.]

1 Exhaust end section.

Aligning Exhaust End Section:

? [Image description: Shows alignment of the exhaust end section and rubber isolator.]

Align exhaust end section 1 and rubber isolator 2. Ensure sufficient spacing of exhaust end section to transmission and to wheel well trim. (Picture shows vehicle with direct shift transmission)

Installing Wheel Well Trim:

? [Image description: Shows the underride protection.]

1 Underride protection, 2 42 mm dia. hole.

Cutting out Underride Protection:

? [Image description: Shows a rubber isolator being inserted into a hole.]

Insert red (rt) rubber isolator 2 in 42 mm dia. hole. Align exhaust end section 3 flush on red rubber isolator 2.

1 Underride protection.

Mounting Rubber Isolator:

? [Image description: Shows the exhaust end section aligned with the rubber isolator.]

Final Work

⚠️ WARNING!

• Reassemble the disassembled components in reverse order.
• Check all hoses, clamps and all electrical connections for firm seating.
• Secure all loose cables using cable ties.
• Only use manufacturer-approved coolant.
• Spray the heater unit components with anti-corrosion wax (Tectyl 100K, Order No. 111329).
• Connect the battery.
• Fill and bleed the coolant circuit according to the vehicle manufacturer's specifications.
• Set the digital timer.
• Make settings on A/C control panel according to the "Operating Instructions for End Customer".
• Check the proper operation of the additional heater, see the operating instructions/installation instructions.
• Attach the "Switch off additional heater before refueling" sticker to the left-hand B-pillar.

Adaptingsensitivity of passenger compartment monitoring

⚠️ WARNING! This can only be carried out at an authorized workshop! Observe the applicable repair manual of the respective vehicle.

• Connect the VAG tester
• Open Item 46 (Central Module of Comfort System)
• Go to Item 10 (Adjustment)
• Follow the request for the code entry and enter the code 15
• Reduce the sensitivity of the passenger compartment monitoring to 50 %
• Save this setting
• The adjustment of the sensitivity of the passenger compartment monitoring is completed.

Webasto AG

Postfach 80 - 82132 Stockdorf

Hotline 01805 / 932278 - Hotfax 0395 / 5592-353

http://www.webasto.de

Printed in Germany 12/2008 Printing: Steffen

Operating Instructions for End Customer

Please remove page and add to the vehicle operating instructions.

Note:

We recommend matching the heating time to the driving time. Heating time = driving time.

Example: For a driving time of approx. 20 min. (in one direction), we recommend not exceeding a switch-on time of 20 min.

If the summer/winter switch option has been installed, this must be switched in accordance with the time of year. The heater unit will then only switch on the vehicle fan to ventilate the vehicle interior in the position ❄️ Winter heat and in the position ☀️ Summer.

Before parking the vehicle, make the following settings:

? [Image description: Control panel for Climatic system.]

1 Air outlet to windshield

2 Set fan to level "1", or possibly "2"

3 Set temperature to "max."

? [Image description: Control panel for Climatronic system.]

1 Air outlet faces upward

2 Set temperature on both sides to "HI".