Installation and Operation Guide

Tundra HD 2500 Power Inverter

for the

Webasto BlueCool Truck System

www.tundrainternational.comwww.techwebasto.com

BCTSP0063A

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Table of Contents

1. Introduction 41.1 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.2 Output waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2. Physical layout 52.1 Front, rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3. Permanent installation 63.1 Recommended material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.2 Recommended tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.3 Where to install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.4 Mounting the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.5 Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.6 Fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.7 Battery cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.7.1 Preparation of the cable connected to the “positive” end of the inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.7.2 Preparation of the cable connected to the negative side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.8 Connecting the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.9 Connection of the batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.9.1 Positive terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.9.2 Negative terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4. Operation 114.1 Operating limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5. Maintenance 12

6. Troubleshooting 126.1 Television and CB radio interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126.2 Troubleshooting guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7. Specifications 14

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1. Introduction

The BCT Truck System is equipped with one of the most sophisticated and reliable power inverters on the market today. Incorporating some of the latest technological developments, it will give years of trouble free operation.

In order to get the most out of the inverter, the installation procedure must be followed carefully and it must also be properly used. Please thoroughly read this manual before installing and using the new Tundra inverter.

It is important to pay special attention to the CAUTION and WARNING statements in this manual as well as on the inverter.

Should the inverter be exposed to rain, moisture, or strong impact, have it inspected by a qualified technician before use.

WARNING: The electrical current at the entrance and exit of the inverter may cause severe personal injury; make certain that you have read and understand all the parts of this manual before installing and using the inverter.

WARNING: The inverter produces an electrical current similar to that found in most North American homes, with all the accompanying dangers. Be sure to install the product out of the reach of children.

1.1 DisclaimerElectrical codes vary depending on location and the type of installation. Electrical installations must meet local and national wiring codes and should be performed by a qualified electrician.

The inverter’s specifications are subject to change without notice.

1.2 Output waveformThe AC output of the inverter is regulated to 120 volts and its waveform is called a “Modified Sine Wave.” It is a stepped waveform, suitable for most AC loads, designed to have characteristics similar to sine waves delivered by utility power.

Note that the Tundra’s modified sine wave output power is much more efficient than the “square wave” generated by other inverters on the market today.

The modified sine wave generated by the inverter is designed to have an RMS (Root Mean Square) voltage of 120 volts, the same voltage as that coming out of standard household power. Most AC voltmeters are sensitive to the average value of the waveform rather than the RMS value. They are calibrated for RMS voltage assuming the voltage waveform is “pure sine wave.” These meters may not read the modified sine wave correctly; they will read about 2-20 volts lower. To read the voltage correctly, you must use a true RMS reading voltmeter.

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2. Physical layout

2.1 Front, rear panelFront Panel

ON/OFF switch: The ON/OFF switch turns the inverter’s control circuit ON and OFF. It does not disconnect powerfrom the inverter; you must disconnect the AC (120 volts) and DC (12 volts) power before workingon any circuits connected to the inverter. When the switch is on but no power is being supplied toa load, the inverter draws less than 500 mA. This is a very low current draw but left in this state theinverter will eventually drain the batteries.

AC Outlets: The maximum output of the inverter is assumed to go through the AC cable. The inverter isequipped with a “hard wired” AC outlet.

CAUTION: Leave power inverter in the OFF position during the installation.

Rear Panel

Chassis ground screw: A chassis ground wire (installer supplied) must be properly connected from the inverter to thechassis of the vehicle before operating the inverter. However, if the inverter is mounted to agrounded metal panel on the vehicle, a separate ground wire is not required as the inverter isinternally grounded through the metal case.

Fans: In order for the inverter to operate properly, the fans’ opening must never be obstructed.Allow at least six inches of clearance around the inverter for airflow.

Figure 1: Front panel

Figure 2: Rear panel

D C T O A C P O W E R I N V E R T E R

WITH SMART START SOFT WARE TECHNOLOGY

ON

OFF

HARD WIRE OUTLET

ELECTRICALSHOCK HAZARD

RISQUE DE CHOCÉLECTRIQUE

POWER

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3. Permanent installation

The use of the Tundra inverter installation kit is strongly recommended.

This complete installation kit is custom designed to maximize performance. It has been developed to promote safe installation and to help eliminate the inconvenient task of identifying and shopping for the requisite materials elsewhere.

CAUTION: Before installation, make sure that the inverter is turned “OFF.”

3.1 Recommended material– 3 Sections of high quality, flexible battery cable #2/0 AWG (12’, 11’, 1’)– 2 Sets of ¾” PVC strain relief for flexible cable– 2 High quality compression lugs #2/0 AWG– ANL / CNL fuse block– ANL / CNL fuse 250 amperes (DC)– 8 Metallic cable clamps– 24 Feet of plastic «loom» tubing to protect the cables– 2 One inch wide heat shrinkable tubing for cables– 25 High-endurance plastic cable ties– 1 Roll of electrical tape– 1 Set of 12 assorted self-threading screws

3.2 Recommended tools– Hollow punch or hole saw for metal– Drill bit set for metal– Screw driver set– Open end wrench set– Side cutters– Power drill

3.3 Where to installThe inverter should be installed in a location that meets the following requirements:

DC INPUT +–

! DO NOT REVERSE POLARITYNE PAS INVERSER LES POLARITÉS

DISPLAY REMOTE CONTROL COMPATIBLE ONLY

Chassis Ground - use #8 AWG wire

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– Dry: Keep the inverter away from any water or moisture.– Cool: Ambient air temperature should be between 32 and 85 °F (0 and 30 °C).– Ventilated: Ensure that the unit is located in a well-ventilated compartment. At least 6 inches (15 cm) of

clearance are required around the inverter for air flow. Verify that all ventilation openings onthe unit (front and rear panels) are not obstructed.

CAUTION: To avoid fire hazards and/or overheating, do not cover or obstruct any ventilation openings. Do not install the inverter in a zero clearance compartment.

– Safe: Do not install the inverter in the same compartment as the batteries, or in any compartmentcapable of storing flammable liquids (such as gasoline). Power inverters may produce sparksthat can result in fire if exposed to flammable vapors.

WARNING: This equipment contains components that tend to produce arcs or sparks. To reduce the risk of fire or explosion, do not install in a compartment containing batteries or flammable materials, or in a location that requires ignition protected equipment.

– Close to batteries: Install the inverter as close as possible to batteries (but not in the same compartment) in orderto minimize the cable length required to connect the inverter to the batteries. It is better andcheaper to run longer AC wire (between the inverter and the BCT Charge Unit) than DCcables (between the inverter and the batteries).

3.4 Mounting the inverterWhen you have decided where to place it, mount the inverter on a flat surface using the mounting flanges. Mounting hardware should be corrosion resistant, and 1/4” or larger. The inverter may be mounted horizontally on a vertical surface (the fans’ opening must not point up or down) or on a horizontal surface. Upside down installation is not recommended, as it may put too much stress on components such as the transformers inside the power inverter.

Close to the inverter, drill two holes in the truck’s floor and install the two PVC strain relief fittings to protect and secure the cables (Figure 3).

Figure 3: Installation schema

DC INPUT +

–

! DO NOT REVERSE POLARITY

NE PAS INVERSER LES POLARITÉS

DISPLAY REMOTE CONTROL COMPATIBLE ONLY

RE CAPABLE

BCT010267A

PUT CAPACITY: 2500 W (MAX.)

#8 AWG

Pos.N

eg.

#8 AWG copper ground wire (Installer supplied)

Ground terminal

12V-DC input terminals

PVC strain relief fittings

120V-ACoutput cable

Rubber grommet

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3.5 GroundThe inverter has a lug and wing-nut on the rear panel that must be connected, using a #8 AWG copper wire, to the chassis of the vehicle or to a metallic panel connected to the chassis. This grounding procedure conforms to most electrical codes that require AC sources to be grounded in case of malfunctioning. However, if the inverter is mounted to a grounded metal panel on the vehicle, a separate ground wire is not required as the inverter is internally grounded through the metal case. To make sure that you found a good grounding point, run a 12 volt test light from the positive terminal of the battery to the grounding point. If the light comes on, the installation is more than likely suitable.

WARNING: Do not operate the inverter without it being properly grounded to the chassis of the vehicle, doing so may result in an electrical shock hazard.

3.6 FuseA main fuse must be installed in the battery compartment on the positive cable (+) between the batteries and the inverter, as close as possible to the batteries. In this way (and in the event of cable short circuit), the DC current would be cut at the batteries and would not cause a fire.

We recommend a fuse of type “ANL or CNL” 250 amps, mounted on a fuse holder, type “ANL or CNL”. Connect the positive cable sections to the fuse holder, as illustrated in figure 4, and install the fuse. Without tightening them too much, the terminals must be solidly fixed onto the fuse holder, and must not be able to move around.

WARNING: Not installing a fuse can result in fire that may cause severe injuries and/or damages.

Figure 4: Fuse and fuse holder connections

3.7 Battery cablesProper wiring is very important for safe and proper operation of the inverter. Since the inverter has a low voltage(12 volts) and a high current input, low resistance wiring and connections between the batteries and the inverter is essential in order to deliver the maximum amount of usable energy to the load.

To Inverter Positive +

To Battery Positive +

ANL or CNL Fuse Holder

ANL or CNL Fuse 250 Amp.

Short BatteryCable

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Keep the cable length as short as possible, no longer than 12 feet. This will ensure that the overall system efficiency is as high as possible, and will keep the voltage drop between the batteries and the inverter to a minimum.If the voltage drop is too excessive, the inverter may shut down.

3.7.1 Preparation of the cable connected to the “positive” end of the inverter

Route the cable from the fuse holder through the strain relief installed in the floor of the cabin. Refer to step 1 in Figure 5.

Cut the cable to shorten if necessary, not forgetting the length needed to allow movement due to the suspension of the vehicle cabin.

Connect one end of the cable to the fuse holder.

Place rubber boot and the piece of red shrink tube over the other end of the cable as shown in step 2, Figure 5.

Strip 19 mm (3/4 in.) of insulation from the cable end and insert into one of the two compression lugs. Refer to steps 2 & 3 in Figure 5. The compression lug nut will secure the cable and provide a solid connection when fully tightened as shown in step 3.

With a heat gun, shrink the tubing over the lug and cable as shown in step 4.

Step 5 illustrates the completed cable ready for connection to the inverter (+).

CAUTION: Do not solder the terminal lugs to cables. Solid and low resistance connections to the DC power source is essential in order to properly operate the inverter. Solder cannot provide good resistance free connections under high load conditions.

Figure 5: Terminal installation procedure (Positive cable used in this illustration)

3.7.2 Preparation of the cable connected to the negative side

Route the cable from the battery compartment through the strain relief installed in the floor of the cabin. Refer to step 1 in Figure 5.

Cut the cable to shorten if necessary, not forgetting the length needed to allow movement due to the suspension of the vehicle cabin.

Place black rubber boot and the piece of black shrink tube over cable as shown in step 2, Figure 5.

21 3 4 5

Connect to FuseHolder Terminal

Connect to InverterPositive (Red) Terminal

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Strip 19 mm (3/4 in.) of insulation from the cable end and insert into one of the remaining compression lug. Refer to steps 2 & 3 in Figure 5. The compression lug nut will secure the cable and provide a solid connection when fully tightened as shown in step 3.

With a heat gun, shrink the tubing over the lug and cable as shown in step 4.

The completed cable is ready for connection between the inverter (–) and the negative side of the batteries.

3.8 Connecting the inverterThe next step is to make sure that the inverter is turned OFF. Connect the cables (terminal lugs) to the inverter’s DC input terminals: the terminal covered with the RED shrink tube to the positive (+) pole and the terminal covered with the BLACK shrink tube to the negative (–) pole. Make a secure connection using the nuts included with the inverter. The terminals must not move around on the DC terminal bolts, but it must not be too tight either. The rubber boots will protect the DC connections and prevent the terminals from being touched by other metallic items.

CAUTION: Never put a washer or a nut between the terminal lugs and the 12 volts DC input terminals; this results in poor conductivity and may cause the inverter to overheat and cause a fire.

Tighten the PVC strain relief nuts on the cables until the rubber seal is properly compressed and the cables cannot move. Run the cables under the cab and cover them with plastic loom to prevent damage from road debris. Fasten both cables together every 4 inches with plastic cable ties; try to run both DC (12 volt) cables as close as possible together to reduce the risk of interference with a television or CB radio. While keeping in mind to allow cables to move with the cabin air suspension, secure the cables to the chassis from the cabin’s floor to the batteries with several metallic clamps covered with rubber. These clamps will prevent the cables from being cut or damaged by vehicle movement.

3.9 Connection of the batteriesIf you are working with a multiple battery bank, choose a battery with no accessory connected, as it will extend the batteries’ life. Before going further, it is important to correctly identify the cable connected to the positive terminal of the inverter, and the one connected to the negative terminal.

The cables must go from the positive terminal of the inverter to the fuse holder, from the fuse holder to the positive terminal of the battery, and of the negative terminal of the inverter to the negative terminal of the battery. Incorrectly connecting the battery and inverter may damage the inverter permanently, and is not covered by the warranty. Always connect the positive terminals before the negative.

CAUTION: Reversing the polarity when connecting the DC cables may permanently damage the inverter. THIS IS NOT COVERED BY THE WARRANTY.

3.9.1 Positive terminal

Always connect the positive terminals before the negative. Connect the small section of the positive battery cable connected to the fuse holder terminal to the positive side of the batteries, by solidly fixing the terminal with the nut. Without tightening them too much, the terminals must not be able to move around. Refer to Figure 6.

3.9.2 Negative terminal

Connect the cable between the negative terminal of the inverter to the negative terminal of the battery bank, by solidly fixing the terminal with the nut. Without tightening them too much, the terminals must not be able to move around.

WARNING: You may observe a spark when making the cable connections since current may flow and charge capacitors in the inverter. This is normal. Do not make cable connections in the presence of flammable fumes; it may result in explosion and/or fire.

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Figure 6: Battery connection schema

4. Operation

To operate the power inverter, enable it by using the ON/OFF switch on the front panel. The inverter is now ready to deliver AC 120 volts power to the BCT charging unit when required. Note that the inverter will not begin immediate operation. The inverter is controlled by a signal from the BCT control module to a relay connected to the inverter’sON/OFF circuit.

4.1 Operating limitsPower output: The inverter is designed to deliver 2500 watts or 20.8 amps at 120 volts. It also has a power surge

capacity of 5000 watts or 41.6 amps for 1 second.

Input voltage: The inverter will operate with input voltages between 11 and 15 volts. Optimum performance isachieved, however, with input voltages between 12.0 and 14.0 volts. If the voltage drops lowerthan 11.5 volts, the low battery warning alarm will sound.

The inverter will shut down if the voltage drops below 11 volts. This protects the batteries frombeing over-discharged. The inverter will not restart unless the input voltage exceeds 13.0 volts.

The inverter will shut down if the voltage exceeds 15 volts. This protects the inverter fromexcessive input voltage. While the inverter incorporates protection against over voltage, it may stillbe damaged if the input voltage exceeds 16 volts.

For the inverter to operate properly without low voltage drop-out, it is required that the vehicle be equipped with an alternator rated for at least 30 amps higher than original equipment

4 Battery System - Preferred Connections

Main Power,Starter & Alternator

Cables

GroundCable

GroundCable

250 Amp. Fuse

12 V-DC Positive Cable

Inverter toChassis Ground

(Installer Supplied)

12 V-DC Negative Cable

Strain Reliefs

DC to ACInverter

ProtectionBoot

Battery Enclosure

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5. Maintenance

Very little maintenance is required to keep the inverter operating properly. You should clean the exterior with a dry cloth to prevent dust accumulation. A regular maintenance check is recommended, DC input bolts or screws should be tightened periodically, cables should also be inspected for solidity and exterior condition. You must also keep the batteries as clean as possible to prevent current loss that may affect inverter operation.

CAUTION: If you work on the DC input terminals of the power inverter, disconnect both wires at the battery side to avoid any short circuit.

6. Troubleshooting

6.1 Television and CB radio interference1. Operating the inverter can interfere with television and CB radio reception. If this occurs, the following steps may

help to alleviate the problem:

2. Make sure that the inverter is properly grounded to the chassis of the vehicle.

3. Reduce power consumption while watching television.

4. Move the television as far as possible from the inverter.

5. Run both DC cables as close as possible together with cable ties.

6.2 Troubleshooting guideThe Tundra inverter is equipped with a dual purpose power On / diagnostic fault indication LED.

Under normal operation, the indication LED will be green.

Under a low voltage condition of 11.5 Volts or less, the LED will turn to orange and will be flashing with an intermittent alarm sound.

Upon a low voltage shut-down condition of 11.0 Volts or less the LED will be orange and flashing and the alarm sound will be continuous.

NOTE: The two different low voltage alarm sounds are to alert the driver that there is a problem with either the batteries, alternator charging condition or the installation as indicated by an intermittent alarm sound prior to the inverter shutting down as indicated by a continuous alarm sound.

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All other malfunctions such as high temperature shut-down, system overload, high input voltage and AC wiring short or wiring error will be indicated by a constant orange LED and an intermittent alarm sound.

Problem Possible cause Solution

Low AC output voltage Using a voltmeter which cannot properly read the RMS voltage of a modified sine wave

Use a TRUE RMS reading voltmeter

Fault indicator LED flashes orange with an intermittent alarm sound

Low input voltage - 11.5 volts or less Not enough battery capacity

Recharge batteries

Improper Installation. Check inverter’s installation steps

Fault indicator LED flashes orange with a continuous alarm sound

Poor battery condition - 11.0 volts or less

Poor DC wiring

Poor DC terminal lugs connections

Charge or change battery

Use proper cables and make solid connections

Use proper crimping tool

Fault indicator LED turns constant orange with an intermittent alarm sound

High input voltage

Short circuit or AC wiring error

Inverter overload

Thermal shutdown

Improper installation

Check vehicle alternator condition

Check the AC wiring (120 volts) and test BCT Charge Unit on an other power supply to validate functionality

Switch the inverter OFF at least 5 seconds and restart the inverter

Allow inverter to cool down

Inspect area around ventilation ports for blockages and remove

Improve ventilation

Inspect BCT Charge Unit for excessively high-load draw (compressor problem)

Install properly

No output voltage Inverter off

Run signal from BCT control unit not present at inverter switching relay

No DC power to the inverter

Reverse DC polarity

Turn the inverter on

Refer to the BlueCool Truck troubleshooting guides in the Service and Repair manual.

Check the wiring

Check battery fuse and check the installation before changing it

Replace internal fuses of the inverter. Damage caused by reversed polarity is not covered by the warranty.

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7. Specifications

Specifications are subject to change without notice.

Model no HD 2500

AC output continuous power 2500 W

AC output power surge 5000 W

AC output voltage 120 V

AC output waveform Modified

DC input voltage 12 V

Low battery alarm 11,5 V

Low battery shutdown 11.0 V

No load current draw – ON position 0.5 Amp

Cooling fan Yes

Overload protection Yes

Over temperature shutdown 140 °F

Dimensions (L x W x H) 36 cm x 27.5 cm x 10.5 cm

Net weight 7.7 kg

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Webasto Product N.A., Inc.

15083 North RoadFenton, MI 48430

Technical Assistance HotlineUSA: (800) 860-7866Canada: (800) 667-8900

www.webasto.uswww.techwebasto.com

Org. 08/2008 Rev. 2/2012 P/N BCTSP0063A © 2012 Webasto Product N.A., Inc.