Webasto | Thermo Top C | Operating instructions | Webasto Thermo Top C Operating instructions

 Coolant Heater
Thermo Top (TTC)
Operating Instructions
Installation Instructions
Thermo Top C Installation / Operation Manual
Contents
Contents
1. Introduction
1.1 General Description ........................................................................................................ 101
1.2 Legal Provisions ............................................................................................................. 102
1.3 Meaning of Warning, Caution and Note.......................................................................... 102
2. Operating the Webasto Thermo Top C (TTC)
2.1 Switching On...................................................................................................................
2.2 Switching Off...................................................................................................................
2.3 Operation with Optional Digital Timer .............................................................................
2.4 Digital Timer Setting / Operating Instructions .................................................................
201
202
202
204
3. Technical Data
3.1 Technical Data................................................................................................................ 301
3.2 Heater Dimensions ......................................................................................................... 302
3.3 Fuel Pump Dimensions................................................................................................... 302
4. Installation
4.1 General Information ........................................................................................................
4.2 Installation Locations ......................................................................................................
4.3 Mounting the Heater .......................................................................................................
4.4 Exhaust Pipe Connection ...............................................................................................
4.5 Combustion Air Supply ...................................................................................................
4.6 Plumbing the System......................................................................................................
4.6.1 General Information .............................................................................................
4.6.2 Plumbing the Thermo Top C into The Coolant System........................................
4.6.3 Contents - Engine Connections ...........................................................................
4.7 Fuel System....................................................................................................................
4.7.1 General Description .............................................................................................
4.7.2 Fuel System Limitations .......................................................................................
4.7.3 Fuel Pump............................................................................................................
4.7.4 Fuel Standpipe .....................................................................................................
4.7.5 Fuel Line ..............................................................................................................
4.7.6 Fuel Filter .............................................................................................................
4.8 Wiring Connections.........................................................................................................
4.8.1 General Information .............................................................................................
4.8.2 Power Connection to Battery ...............................................................................
4.8.3 Switch and Timer Connections ............................................................................
4.8.4 Wiring Diagram - Thermo Top C (12 Volt) with On/Off Toggle Switch.................
4.8.5 Wiring Diagram - Thermo Top C (12 Volt) with Optional Digital Timer ................
4.9 Initial Operation...............................................................................................................
401
401
402
403
403
404
404
405
407
415
415
415
416
416
418
418
419
419
419
419
421
422
423
5. Maintenance of the Heater
5.1 Annual Maintenance ....................................................................................................... 501
I
Contents
Thermo Top C Installation / Operation Manual
Contents
6. Basic Troubleshooting
6.1 General Information ........................................................................................................
6.2 General Failure Symptoms .............................................................................................
6.3 Heater Lockout Reset Procedure ...................................................................................
6.4 PC Diagnostics Kit ..........................................................................................................
601
601
602
602
List of Figures
101
201
301
302
401
402
403
404
405
406
407
408
409
410
411
Webasto Thermo Top C Coolant Heater........................................................................
Optional 7-Day Timer......................................................................................................
Heater Dimensions .........................................................................................................
Fuel Pump Dimensions...................................................................................................
Installation Locations ......................................................................................................
Permissible Heater Installation Positions........................................................................
Engine Block Preheating and/or Boost Heating..............................................................
Fuel System Limitations..................................................................................................
Fuel Pump Mounting (DP 30) .........................................................................................
Fuel Standpipe................................................................................................................
Fuel Line Connection......................................................................................................
On/Off Toggle Switch......................................................................................................
Optional 7-Day Digital Timer...........................................................................................
Wiring Diagram - Thermo Top C with On/Off Toggle Switch..........................................
Wiring Diagram - Thermo Top C with Optional Digital Timer .........................................
101
203
302
302
401
402
405
415
416
417
418
420
420
421
422
List of Tables
201
301
302
601
Digital Timer Setting Instructions ....................................................................................
Technical Data - Heater .................................................................................................
Technical Data - Circulating Pump ................................................................................
General Failure Symptoms .............................................................................................
Item No. 907512
Org. 9/1/99 Subject to modification.
II
204
301
301
601
Thermo Top C (TTC)
1.
Introduction
1.1
General Description
1
Introduction
Fig. 101: Webasto Thermo Top C Coolant Heater
1.
2.
3.
4.
5.
Control Unit.
Combustion Air Fan Assembly
Combustion Air Inlet Connection Pipe
Coolant Circulating Pump
Coolant Inlet Connection Pipe
6.
7.
8.
9.
10.
Coolant Outlet Connection Pipe
Fuel Inlet Connection Pipe
Exhaust Outlet Pipe
Combustion Chamber
Heat Exchanger
The Webasto TTC is designed for Class 3-7 vehicles. This dynamic system allows you to
preheat engines on or offsite. The TTC offers high performance with low power and fuel
consumption. Approximately 2-hours of operation eliminates overnight idling for heating and the
need for expensive electrical plug-ins. The compact design allows the heater to be frame rail or
engine compartment mounted. The TTC is easy to install, maintain and operate. The universal
package fits most of today vehicles.
101
1
Introduction
1.2
Thermo Top C (TTC)
Legal provisions
Heater installation must be performed in accordance with the manufacturer`s installation
instructions.
Any deviation from these instructions are only permitted with the written approval from Webasto
Thermosystems Inc.
It is the dealer's responsibility to approve installations not performed by Webasto trained
personnel.
Installation not complying with the installation instructions release Webasto Thermosystems Inc.
from any product liability.
OEM installations must be approved by Webasto Thermosystems Inc.
1.3
Meaning of Warning, Caution and Note
WARNING!
This heading is used to highlight that noncompliance with instructions or procedures may cause
injuries or lethal accidents to personnel.
CAUTION!
This heading is used to highlight that noncompliance with instructions or procedures may cause
damage to equipment.
NOTE:
This heading is used to highlight and draw specific attention to information.
102
Thermo Top C (TTC)
2.
2
Operating the Webasto
Operating the Webasto Thermo Top C (TTC)
Before switching on theTTC, set vehicle heating system to the heat position and open any shut
off valves. Depending on the type of control installed in the dashboard of the vehicle, the TTC can
be operated by the following methods.
2.1
Switching On
Using a Switch:
Using the Optional Digital Timer:
Using the Switch:
When the switch is used for turning ON the TTC, the operation indicator (toggle) lights up.
Shortly thereafter, the heater begins operation and delivers heated coolant to the engine.
Using the Optional 7-Day Digital Timer:
1. Set the timer up to 2 hrs. before you want to start the engine. The heater will start at set time.
(See timer operating instructions.)
Or switch fiinstan onf switch on your timer in the vehicle dash to ON The heater will start up.
2. When time is elapsed on your timer or engine preheat is no longer required, switch the TTC
heater OFF The TTC will go through the after-run cycle.
Pushing the fiinstan heatf button or when timer setting reaches desired start time, the fioperatio
indicatorf on the timer will light, signaling that the heater is in operation.
See section 2.3 fiOperatio with 7-Day Digital Timerf for complete instructions.
NOTE:
If heater is being switched on while the engine is warm only the circulating pump will run, coolant
temperature must fall below 86 °F. (30 °C.) before heater starts.
Startup Sequence:
The coolant circulating pump, ceramic igniter and combustion air fan start operation and after
approximately 60 seconds combustion starts (audible combustion sound).
After the coolant temperature has reached the set point of 170 °F (77 °C) the TTC will
automatically adjust its heat output to a lower operating range (part-load heat output).
If the temperature of the coolant continues to rise and climb over 174 °F (79 °C) at the heater outlet,
the heater will cycle off.
When the temperature falls below 149 °F (65 °C) the heater will restart and repeat the heating cycle.
201
2
Operating the Heater
Thermo Top C (TTC)
WARNING!
Due to the danger of poisoning and asphyxiation the heater must not be operated in enclosed
spaces such as garages or workshops without adequate exhaust extraction or ventilation.
The Thermo Top C (TTC) will cycle on and off until:
1. The toggle switch is switched OFF
2. The fiinstan heatf button is pressed once again, signaling heater to shut off.
3. Time has elapsed on the timer.
4. The vehicle battery voltage drops below 9.6 V or the TTC runs out of fuel.
WARNING!
Explosion hazard! The heater must be switched fiOFF while refueling and at fueling stations.
WARNING!
Explosion hazard! Do not operate any Webasto heater in an area where toxic or explosive
materials or fumes may be present.
2.2
Switching Off
Manually: When heating is no longer required, switch the TTC heater off by means of the toggle
switch or by pressing the fiinstan heatf button on the optional timer.
The indicator light turns off, combustion is extinguished followed by an after run cycle of
approximately 90 seconds.
Automatically: When the optional timer has reached the end of the timed cycle (up to 2 hours).
NOTE:
Restarting the heater during the after-run period is permitted.
2.3
Operation with Optional 7-Day Digital Timer
The timer enables you to preset the start time of the heater up to 7 days in advance.
In addition, the timer enables the heater to be switched on and off instantly thereby eliminating the
need for a separate switch.
When the heater is in operation, the display and operation buttons of the timer are illuminated.
The timer features a wake up alarm function.
Programmed Heater Operation
Three memory locations numbered 1 to 3 are available. Each memory location can be assigned a
given time together with the day of the week of which only one can be activated at any one time.
202
Thermo Top C (TTC)
2
Operating the Heater
Preselected Starting Times
The preselected starting time is the time at which the timer switches the heater on automatically.
We recommend that memory locations 1 and 2 be used for presetting starting times within 24 hours
of setting the timer.
Memory location 3 can be used for a starting time within the next 7 days of setting the timer.
Operating Time
The period of time during which the heater is in operation is referred to as operating time.
The heater remains in operation for as long as the operating time has been preset.
Heater operation can be preselected for any time from as little as 1 minute to a maximum of
120 minutes (factory preset is 60 minutes).
Remaining Operating Time
The remaining operating time refers to the period of time the heater still continues to remain in
operation. It can only be changed while heater is in operation.
Setting the Digital Timer
After the power has been connected, all symbols on the digital display will be flashing.
The time of the day and the day of the week must be set.
The Timer can be programmed in that all flashing symbols can be adjusted by means of the
and buttons.
If the buttons are not pressed within 5 seconds, the currently displayed time or function will be
stored.
When the and buttons are pressed for more than 2 seconds, the quick digit advance mode
is activated.
See table 201 on following page for setting reference or full instructions supplied with timer.
Fig. 201: Optional 7-Day Digital Timer
203
2
2.4
Operating the Heater
Thermo Top C (TTC)
Digital Timer Setting / Operating Instructions
Switching the heater
on
Manually: by pressing the button (continuous heating mode)
Automatically: by programming the heater starting time
Switching the heater
off
Manually: by pressing the button
Automatically: after the programmed operating time has elapsed.
With the heater running: by programming the remaining operating time.
Setting time / day of
the week
Press the button for more than 2 seconds - time of the day is flashing - and set the clock
using the and buttons. After 10 seconds, day of the week begins flashing - set the day of
the week in the same manner as the time.
Viewing the time
With the ignition switched off: press the
Programming heater
starting time
Press the button - the memory location is flashing - using the and buttons set start of
the heater operating time. After 10 seconds, day of the week begins flashing - set the day of
the week on which the heater is to turn on.
By repeatedly pressing the button, memory locations 2 and 3 can be programmed or the time
display mode can be reached.
Recalling / erasing
preset times
Repeatedly press the
preset time, press the
memory location.
Programming
duration of operating
time
The heater must be switched off. Press the button for 3 seconds - operating time is flashing and set the desired operating time (10 to 120 minutes) using the and buttons.
Setting the
remaining operating
time (Bus wiring
Option)
Set the desired remaining operating time (1 to 120 minutes) using the and buttons. The
remaining operating time refers to the time the heater still continues to remain in operation after
the vehicle ignition is turned off. It can only be changed while the heater is in operation and the
ignition switched off.
Setting the wake up
time
( Digital Comfort
Timer Only)
A wake up time can only be programmed on the fi1531 comfort digital timer. The wake up time
is not bound to a specific day of the week. Repeatedly press the button until the bell symbol
appears on the display. Set the desired wake up time using the and
buttons. The
alarm clock turns off after 5 minutes or when one of the buttons is pressed.
Recalling / erasing
the wake up time
To recall the wake up time, repeatedly press the button until bell symbol
appears on the
display - read off wake up time. To erase the wake up time: press the button until the bell
symbol
is no longer visible on the display.
Remote control
Possible by means of an optional external signal.
button until the desired memory location is displayed. To erase the
button several times until the time of the day is displayed instead of the
Table 201: Digital Timer Setting Instructions
204
button (bus wiring only).
Thermo Top C (TTC)
3.
Technical Data
3.1
Technical Data
3
Technical Data
The following data is subject to the normal tolerance for heaters, if no tolerance is specified.
This is approximately +/-10% in an ambient of 20 °C at nominal voltage.
Heater
Thermo Top C (TTC) Diesel
Design
Heat Rating:
Input
Output
Fuel
Fuel Consumption:
Coolant heater with evaporator burner (Ferro-Tech Technology)
- full load
- partial load
- full load
- partial load
6.14 kW (20,960 Btu/hr)
3.1 kW (10,480 Btu/hr)
5.0 kW (17,200 Btu/hr)
2.5 kW (8,600 Btu/hr)
Diesel #1 Diesel #2 and Arctic
- full load
- partial load
0.61 l/hr (0.16 US gal/hr)
0.30 l/hr (0.08 US gal/hr)
12 Volts
9.6... 15 Volts
Rated Voltage
Operating Voltage
Rated Power Consumption Including
Circulating Pump:
- full load
- partial load
Maximum Permissible Ambient
Temperature:
Heater:
- operation
- storage
Fuel Pump
- operation
Maximum Allowable Working Pressure
(Coolant System)
Capacity of Heat Exchanger
Minimum Capacity of Coolant System
Minimum Volume of Flow
CO2 Content in Exhaust Gas
Dimensions of Heater
Weight
46 Watts (3.8 Amps)
32 Watts (2.6 Amps)
- 40... +60 °C (- 40...+140 °F)
- 40... +120 °C (- 40...+248 °F)
- 40... +20 °C (- 40...+68 °F)
0.4... 2.5 bar (6.0... 36 psi)
0.15 Liters (.04 US gal)
4.0 Liters (1 US gal)
250 l/hr (66 US gal/hr)
8... 12.0 Vol.-%
Length 232 mm (9.1 in)
Width 105 mm (4.1 in)
Height 163 mm (6.4 in)
3.2 kg (7.0 lbs.)
Table 301: Technical Data - Heater
Circulating Pump
Volume Flow Against 0.13 bar (1.9 lbs.)
Rated Voltage
Operating Voltage Range
Rated Power Consumption
Dimensions of Circulating Pump
Weight
Model U 4847
450 l/hr (2.0 US gal/min)
12 Volts
9.6... 15 Volts
14 Watts (1.16 Amps)
L 95 mm x W 61 mm x H 61 mm (3.7f x 2.4f x 2.4fl
0.3 kg (.66 lbs)
Table 302: Technical Data - Circulating Pump
301
3
3.2
Technical Data
Heater Dimensions
Fig. 301: Heater Dimensions
Fig. 302: Fuel Pump Dimensions
302
Thermo Top C (TTC)
Thermo Top C (TTC)
4.
Installation
4.1
General Information
4
Installation
Webasto will take you step by step through the installation process to ensure successful operation
for years to come. The installation must be performed in accordance with the installation instructions
provided in this manual.
WARNING!
Asphyxiation risk! The heater must not be installed in either the driver's compartment or in the
passenger area of the vehicle.
NOTE:
This manual does not cover all possible installations. For special applications use this manual as a
general guideline only. Contact an authorized Webasto dealer or Webasto Thermosystems directly
at USA: 1-800-555-4518 Canada: 1-800-667-8900
4.2
Installation Locations
CAUTION!
Do not mount the heater directly
to the engine! Heavy, constant
vibration produced by the engine
may interfere with the proper
operation of the heater and lead
to heater component damage.
Fig. 401: Installation Locations
1. Inside of the engine compartment in a splash protected area (Preferred).
2. On left/right side of the frame.
3. Inside under-step compartment.
401
4
4.3
Installation
Thermo Top C (TTC)
Mounting the Heater
Fig. 402:
Permissible Heater Installation Positions
WARNING!
Asphyxiation risk! DO NOT mount heater inside passenger, sleeper or storage areas.
CAUTION!
The openings of the water connecting pipes must never point in a downward direction in any
installation position. Damage to heater will result due to trapped air in heat exchanger.
CAUTION!
The heater must not be installed in the immediate vicinity of or above hot vehicle parts.
The heater must not be installed in the direct splash water area of the wheels.
The heater should be mounted as low as possible in the vehicle to assure automatic purging of air
from circulating pump and coolant lines. The coolant pump is not self-priming.
Preferably, the heater should be mounted in the engine compartment.
1. Ensure adequate clearance for heater and components in existing enclosure or mounting area.
2. Carefully layout proposed heater mounting position and mark all holes for drilling keeping in
mind location for exhaust, coolant lines and wiring access. Once all requirements are met,
drill holes.
3. Mount heater and components according to your plan, fasteners for mounting heater are
provided.
NOTE:
Heavy Duty frame rail bracket is available. Order under part number 901088.
402
Thermo Top C (TTC)
4.4
4
Installation
Exhaust Pipe Connection
WARNING!
Asphyxiation risk! Exhaust pipes must be so routed that the possibility of exhaust fumes entering
the vehicle is unlikely.
CAUTION!
Route the exhaust pipe in such a way as to prevent touching or being directed toward any part of
the vehicle that may be damaged by heat (i.e., brake lines, electrical wiring, hoses).
NOTE:
Additional flexible exhaust tubing is available from your Webasto Distributor or Dealer under part
number 900126.
One meter (39 inches) of flexible exhaust tubing has been supplied with the heater. Attach tube to
the heater with exhaust clamp supplied.
The exhaust tube should be routed in a gradual downward slope away from heater allowing
condensation to drain.
Secure exhaust tube to vehicle with fiP clip supplied. Keep exhaust tube at least 2 in. (50 mm) away
from heat sensitive materials.
The outlet opening of the exhaust tube must not point in the direction of travel to avoid any possible
clogging caused by snow, mud or foreign materials.
4.5
Combustion Air Supply
WARNING!
Never draw combustion air from inside the vehicle, or from areas where fumes or gases can
accumulate. Drawing of combustion air from areas where people are present is strictly prohibited!
A combustion air tube has been supplied with the heater. Looking at the tube, you will see one end
has a staple holding the inner liner and outer casing together.
The stapled end is the inlet end of the tube, the other end is to be attached to the heater.
To attach tube to the heater, stretch the outer casing about an inch further than the inner liner.
This will then slip over the inlet pipe of the heater and clamped in place.
Do not make any bends immediately after the attachment point to the heater. Doing so may cause a
restriction where the inner liner of the tube begins. Make all bends at least 3 inches away or further
from heater connection point.
The combustion air tube should be routed in a gradual downward slope away from heater allowing
moisture to drain.
The intake opening of the combustion air tube must not point in the direction of travel to avoid any
possible clogging caused by snow, mud or foreign materials.
Combustion air should always be taken from a clean area protected from road splash.
403
4
Installation
4.6
Plumbing the System
4.6.1
General Information
Thermo Top C (TTC)
The TTC with coolant circulating pump must be mounted at least 6" (15 cm) below the lowest
permissible coolant level of the vehicles cooling system.
Minimum amount of coolant in the cooling system should be at least 1.0 US gal. (4.0 l). Independent
heating systems require a minimum of 3.0 US gal. (12.0 l). A minimum of 10% of a good quality
antifreeze should be maintained in the cooling system at all times.
Heater and water pump fit 3/4f (19 mm) I.D. heater hose meeting SAE 20 R3 specifications.
Silicone hose requires special hose clamps.
WARNING!
Burn risk! When working on the coolant system, allow the engine to cool down and open the
radiator cap
NOTE:
Heater hose must meet SAE 20 R3 specifications.
NOTE:
Hose clamps must be tightened to 45 in/LB. (5 Nm) torque. Silicone hose requires special hose
clamps.
404
Thermo Top C (TTC)
4.6.2
4
Installation
Plumbing the TTC into The Coolant System
Fig. 403: Engine Block Preheating
Engine Block Preheating:
1. Remove radiator pressure cap and release system pressure.
2. Drain coolant from engine.
3. Plumb the Webasto system as shown above.
4. Refill engine coolant as per engine manufacturer's recommendations and reinstall the radiator
pressure cap.
405
4
406
Installation
Thermo Top C (TTC)
Thermo Top C (TTC 4,QVWDOODWLRQ
4.6.3 Contents - Engine Connections
Caterpillar
3116 .............................................................................................................................
3176 .............................................................................................................................
3306 .............................................................................................................................
3408 .............................................................................................................................
C-10/C-12 .......................................................................................................................
408
408
409
409
410
Cummins
B Series .......................................................................................................................... 411
C Series .......................................................................................................................... 412
Detroit Diesel
Series 50......................................................................................................................... 413
Series 55......................................................................................................................... 413
Mack
E6 / E7 ............................................................................................................................ 414
407
4,QVWDOODWLRQ
Thermo Top C(TTC)
Caterpillar
Caterpillar 3116
Caterpillar 3176
408
Thermo Top C (T7&,QVWDOODWLRQ
Caterpillar
Caterpillar 3306
Caterpillar 3408
409
4 ,QVWDOODWLRQ
Thermo Top C (TTC)
Caterpillar
Caterpillar C-10, C-12
410
Thermo Top C (TTC)4,QVWDOODWLRQ
Cummins
Cummins B Series
411
4 ,QVWDOODWLRQ
Thermo Top C (TTC)
Cummins
Cummins C Series
412
Thermo Top C (TTC)
4,QVWDOODWLRQ
Detroit Diesel
Detroit Diesel Series 50
Detroit Diesel Series 55
413
4 ,QVWDOODWLRQ
Thermo Top C (TTC)
Mack
Mack E6 / E7
414
Thermo Top C (TTC)
4.
Installation
4.7
Fuel System
4.7.1
General Description
4
Installation
The pump, fuel line and fuel standpipe are integral to the systems reliability and must be installed
according to these instructions to ensure proper heater operation.
4.7.2
Fuel System Limitations
CAUTION!
If the fuel tank is higher than the fuel pump, the top of the tank may not be more than 20" above the
pump.
Fig. 404: Fuel System Limitations
Maximum suction height (A) = 3' 3" (1m)
Maximum suction length (A + B) = 6' 6" (2m)
Maximum delivery length (C + D) = 19' 6" (6m)
Maximum delivery height (D) = 9' 9" (3m)
415
4
Installation
4.7.3
Thermo Top C (TTC)
Fuel Pump
The fuel pump MUST be mounted in a horizontal position in order to function correctly and deliver
the proper quantity of fuel.
Mount the fuel pump as close to the fuel source as practicable.
Do not mount fuel pump near heat sources (exhaust pipes, hot coolant lines, etc.)
Pay particular attention to the fuel line and pump limitations as covered in sections 4.7.2. and 4.7.3.
Fig. 405: Fuel Pump Mounting (DP 30)
4.7.4
Fuel Standpipe
The fuel is drawn from the vehicles fuel tank through a fuel standpipe. This standpipe can be utilized
on vehicles with a spare threaded port, or if no threaded port is available, a 1" hole can be drilled into
the tank and the universal tank boss installed as shown in figure 407. Keep the fuel standpipe 2"
from the bottom of fuel tank.
Fuel standpipe installation:
1. Cut or extend fuel standpipe to length, approx. 2" off fuel tank bottom. Angle the cut to prevent
clogging. Remove burrs from cut end.
2. Install the universal fuel standpipe
- use 1/4" or 1/2" spare port on fuel tank (if available) and install fuel standpipe
or
- drill 1" hole on top of tank (assemble tank-boss and fuel standpipe) and install assembled
universal fuel standpipe
3. Connect fuel line from fuel metering pump to fuel standpipe using rubber connectors and clamps.
4. Route and secure fuel line from heater to fuel tank.
NOTE:
Fuel standpipe with universal tank boss can be installed from outside of tank. First assemble fuel
standpipe and tank-boss and then insert at an angle through the 1f hole previously drilled into tank.
Tighten down with nut provided. Do not over-tighten.
416
Thermo Top C (TTC)
4
Installation
Fuel Standpipe
Fig. 406: Fuel Standpipe
417
4
4.7.5
Installation
Thermo Top C (TTC)
Fuel Line
Fuel line, couplers and clamps are provided in the installation kit and are required for proper
operation.
CAUTION!
Fuel line must be secured every 12f (30 cm) and kept away from hot exhaust and moving parts
(drive shaft, wheels, etc.
NOTE:
Use supplied hose clamps to secure all fuel line connections.
The TTC has been equipped with fuel line meeting the required specifications for proper
operation.
The inside diameter of this fuel line is 0.08f (2.0 mm) and must not be substituted for fuel line of a
larger diameter. Doing so will result in improper fuel delivery and the formation of air pockets in the
fuel system which will interfere with heater operation.
Fuel line connections must be made as shown in figure 407, fuel line connection.
Fig. 407: Fuel Line Connection
4.7.6
Fuel Filter
The TTC heater may be equipped with a fuel filter.
Fuel filters require changing at least annually and in cases of dirty fuel more often.
NOTE:
If heater is equipped with a fuel filter, change filter at least annually.
418
Thermo Top C (TTC)
4.8
Wiring Connections
4.8.1
General Information
4
Installation
The control unit is equipped with low voltage protection, therefore it is imperative to keep the
vehicle's battery connections and battery in good condition.
NOTE:
The Webasto heating system will not perform to your satisfaction with a weak battery.
4.8.2
Power Connection to Battery
Power harness connection instructions:
1. Route and secure wire harness from Webasto heater to battery box and cut harness to length.
2. Strip wires and crimp supplied ring tongue terminals to the positive (red) and negative (brown)
wire leads.
3. Clean any corrosion from battery terminals.
4. Connect the leads to the battery terminals.
5. Protect connections with an anticorrosion compound designed for use with electrical connections
and battery terminals.
CAUTION!
If welding is to be performed on the vehicle, the main battery cables must be disconnected from the
battery to protect the electronic control unit.
4.8.3
Switch and Timer Connections
CAUTION!
When drilling holes on the vehicle, do not drill into existing wiring or other mechanical components.
Switch Installation:
1. Select a suitable location in the vehicle dash for the On/Off toggle switch.
2. Drill a 1/2f hole through the dash for the toggle switch.
3. Route harness between heater and dash, secure harness along its length with wire ties.
If possible, use existing hole in fire wall or drill in suitable location. Protect the harness with a
grommet at the fire wall.
6. Connect the terminals of the harness to the switch. See figure 408 on next page and wiring
diagram figure 410 for reference.
419
4
Installation
Thermo Top C (TTC)
Timer installation instructions:
1. Select a suitable location in the vehicle dash for the timer.
2. Temporarily affix timer drilling template to dash or see timer dimensions.
3. Cutout hole to dimensions on template or timer dimensions.
4. Mount timer bezel to dash.
5. Route harness between heater and dash, secure harness along its length with wire ties.
If possible, use existing hole in fire wall or drill in suitable location. Protect the harness with a
grommet at the fire wall.
6. Connect the terminals of the harness to the timer. See figure 409 below and wiring diagram figure
411 for reference.
7. Push timer into place in dash bezel.
Fig. 408: On/Off Toggle Switch
Fig. 409: Optional 7-Day Digital Timer
420
4 Installation
4.8.4a Wiring Diagram – Thermo Top C TTC (12 Volt) with ON/OFF Switch
Thermo Top (TTC)
4 Installation
4.8.5a Wiring Diagram – Thermo Top C TTC (12 Volt) with Timer
Thermo Top (TTC)
Thermo Top C (TTC)
4.
Installation
4.9
Initial Operation
4
Installation
1. Check your installation for:
- loose nuts and bolts.
- exhaust system routing and clamp tightness.
- loose hose clamps.
- routing and securing of wiring and heater hoses.
- kinked or pinched hoses.
- routing and securing of fuel lines.
- battery connection and polarity.
2. Top off or refill cooling system with coolant as per engine manufacturers recommendations.
3. Open shutoff valves.
4. Set heater valve to max. heat position and turn off Air Conditioning in cab and sleeper.
5. Start the vehicle engine and run it at a fast idle for 10 minutes to purge air from the TTC
and the heat exchanger. While the engine is running check:
- hose connections for leaks.
- coolant level in the expansion tank and add coolant as needed.
6. Shut off the engine.
7. Switch on Webasto heater using the toggle switch or the fiInstan Heatf button on timer and check:
- Switch toggle or instant heat button illuminates.
- circulating pump in operation.
- initiation of start up sequence.
- successful start up and operation.
8. Temperature differential between water inlet and outlet should not exceed 10 °C (18 °F).
NOTE:
Coolant temperature must be below 86 °F (30 °C) to start up.
NOTE:
Installation with long fuel lines may need a second start attempt to prime the fuel lines. Cycle
ON/OFF switch to reset control unit.
NOTE:
The engine temperature gauge may read lower than actual heater output temperature. This is due
to the location of the temperature gauge sensor on the engine.
423
4
Installation
Thermo Top C (TTC)
10. Switch OFF TTC heater.
11. Re-tighten hose clamps to 45 in/LB. (5 Nm) and inspect installation for leaks.
12. Complete the warranty card and send to Webasto Thermosystems.
NOTE:
Necessary information to complete warranty card and ensure full warranty coverage can be found
on the heater name plate.
424
Thermo Top C (TTC)
5.
Maintenance of the Heater
5.1
Annual Maintenance
5
Maintenance of the Heater
TheTTC heater requires a minimum of maintenance to keep in good operating condition.
The following maintenance procedures should be performed annually before each heating season:
NOTE
For major repair and spare parts, return to your authorized Webasto Thermosystems Specialist.
Enclosure Box and Heater
- Clean the heater and enclosure box from any accumulated debris or dust with compressed air.
- Inspect all components for wear and damage.
Electrical System
- Check wiring harnesses for damage, repair or replace if damaged.
- Check the condition of the batteries and the connections.
- Load test the batteries and replace if necessary.
NOTE
The heater will not function properly with weak batteries.
Combustion Air System
- Check for obstructions at air intake port.
- Check air intake tube carefully for restrictions and damage. Repair or replace if damaged.
Exhaust System
- Check the exhaust system carefully for restrictions or corrosion. Replace damaged parts.
Fuel System
- Change fuel filter if equipped. Inspect fuel line for damage, restrictions, routing or loose
connections. Repair or replace if damaged.
Coolant System
- Inspect all coolant lines and clamps for leakage, restrictions or damage. Repair or replace.
- Inspect coolant circulation pump for leakage. Repair or replace if damaged.
Operational Test
- Run your heating system for at least 15 minutes.
- Check water and fuel connections for leakage. Re-tighten hose clamps if necessary.
NOTE
Operate your Webasto at least once a month for 20 minutes.
501
5
502
Maintenance of the Heater
Thermo Top C (TTC)
Thermo Top C (TTC)
6.
Basic Troubleshooting
6.1
General Information
6
Basic Troubleshooting
This section describes troubleshooting procedures for the TTC coolant heater.
Troubleshooting is normally limited to the isolation of defective components.
CAUTION
Troubleshooting requires profound knowledge about structure and theory of operation of the heater
components and may only be performed by skilled personnel.
Before troubleshooting, check for and eliminate these defects:
- blown fuses
- fuel supply (plugged fuel filter)
- corrosion on battery terminals, electrical wiring, connections and fuses
- loose contact on connectors
- wrong crimping on connectors
NOTE
After any correction of a defect a functional test has to be performed in the vehicle.
6.2
General Failure Symptoms
The following table lists possible failure symptoms.
Failure Symptom
Probable Cause
Remedy
Coolant heater
switches off
automatically
(Fault lockout)
No combustion after start
or automatic repeat start
Switch off heater momentarily and switch on once again
Flame extinguishes during
operation
Switch off heater momentarily and switch on once again
Heater overheats
Check coolant lines for obstructions, closed valves and kinks.
Check coolant level. Allow heater to cool down, reset over heat
limiter, switch off heater momentarily and switch on once again
Vehicle electrical system
voltage too low
Charge battery
Switch off heater momentarily and switch on once again
Combustion air and/or
exhaust ducting blocked
Check combustion and exhaust ducting for obstructions
Heater expels black
fumes from exhaust
Table 601: General Failure Symptoms
601
6
6.3
Basic Troubleshooting
Thermo Top C (TTC)
Heater Lockout Reset Procedure
The TTC is designed with a lockout safety feature built in to the control unit. After 3 consecutive
unsuccessful startup attempts, the heater will lock itself out from any further start attempts. The
heater may also enter the lockout mode after experiencing an overheat condition.
The following procedure will clear the lockout mode and reset the heater for normal operation:
1. Remove fuse F1 (15 Amp), refer to wiring diagram figure 411 for identification.
Wait 10 seconds before reinserting. This is done to prepare the control unit for resetting.
2. Wait a further 10 seconds after reinserting fuse F1. Now turn the heater on using the On/Off
switch or the fiinstan onf button of the optional timer.
3. Wait 10 seconds after turning the heater on and remove fuse F1 again.
4. Wait a further 30 seconds and then turn the heater off at the switch or optional timer.
5. Reinsert fuse F1 after waiting 3 to 10 seconds of shutting off the heater.
6. Wait a further 10 seconds and turn the heater back on again.
The lockout mode should now be canceled and the heater operating normally.
6.4
PC Diagnostics Kit
CAUTION
Diagnostics equipment is intended for use by Webasto trained personnel at authorized Webasto
Distributor, Dealer and End User service facilities.
It is possible to read and remove (reset) stored fault codes from the TTC memory.
This is achieved through the use of a diagnostic interface kit connected to the TTC and an IBM
compatible computer having the necessary software installed.
The PC Diagnostic Interface Kit comes complete with connecting hardware, software and
instructions. Also available are several interface connectors for use with Webasto heaters equipped
with internal diagnostics capabilities such as theTTC.
Order PC Diagnostics Kit under part number 9009064C.
Kit does not include required adapter, please order adapter under part number 92566B.
In addition to working with stored fault codes, the PC Diagnostics Kit allows you to do several other
functions such as reading values while the heater is in operation or testing individual components.
Printing out of fault codes is also available (User supplied printer required).
For further capabilities and instructions for use with the TTC heater, see instruction manual
supplied with the PC Diagnostics Kit.
602
Org. 3/2000 Rev. 3/2013 907512A
Webasto Thermo & Comfort N.A., Inc.
15083 North Road
Fenton, MI 48430
Technical Assistance Hotline
USA:
(800) 860-7866
Canada:
(800) 667-8900
www.webasto.us
www.techwebasto.com
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