Valeo spheros thermo 230 Workshop Manual Download

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807

Thermo 230 / 231 / 300 / 301 / 350

8 Servicing

8.6.4 Exhaust Line

Observe official regulations concerning the installa-
tion (see

1.6

ATTENTION:

The exhaust pipe outlet opening must not point in the
direction of motion.
The exhaust pipe outlet opening must be located so
as not to expect clogging by snow or mud.
The combustion air intake and exhaust outlet is to be
located so that no air pressure difference builds up in
any operating condition of the vehicle.

Rigid pipes made of unalloyed or alloyed steel with a mini-
mum wall thickness of 1.0 mm have to be used as exhaust
line or flexible pipes made of alloyed steel only. The
exhaust pipe is secured to the air heater e.g. with a clamp.

Permissible exhaust line dimensions:
–

inner diameter: 70 mm

–

max. length: 5 m without combustion air intake exten-
sion line

–

max. bend: 270°

As an alternative an exhaust deflector must be installed
approved by Spheros.

8.7

Removal and Installation

CAUTION

In installed condition only the following disassembly or
removal procedures are permitted should enough space
for removal allow such action:

–

replacement of temperature limiter

–

replacement of temperature sensor

–

replacement of combustion air fan

–

replacement of burner

–

replacement of igniter box

–

replacement of flame sensor

–

replacement of combustion chamber

8.7.1 Heater, Removal and Installation

8.7.1.1 Removal

1. Disconnect connectors of cable harness in vehicle

and of circulation pump.

2. Disconnect combustion air intake on heater if

required.

3. Loosen clamp on exhaust outlet.

4. Loosen fuel supply and return line connections,

disconnect and fit dummy plugs.
Close water cocks as applicable.

5. Loosen hose clamps on coolant hoses, disconnect

hoses and fit dummy plugs.

6. Remove 3 screws and washers or 4 screws and

washers.

7. Remove heater.

8.7.1.2 Installation

1. Locate heater for installation and secure with 3 screws

and washers or 4 screws and washers.

2. Secure line on exhaust outlet using clamp.
3. Slide on coolant hoses and fasten with hose clamps.

Torque clamps with 1.5 Nm. Open water cocks.

4. Connect fuel supply and return lines and tighten

connections.

5. Secure combustion air inlet line on heater as

applicable.

6. Connect electrical connectors of cable harness in

vehicle and to circulation pump.

7. Bleed fuel supply system.
8. Bleed coolant circuit.

8.7.2 Temperature Limiter, Replacement

NOTE:

The replacement procedure for the temperature limiter is
identical with the heater installed or removed.
Perform replacement in accordance with

9.2.1

8.7.3 Temperature Sensor, Replacement

NOTE:

The replacement procedure for the temperature sensor is
identical with the heater installed or removed.
Perform replacement in accordance with

9.2.2

Prior to replacement of temperature sensor in in-
stalled condition relief overpressure in cooling
system by opening the cooling circuit sealing
element.
If required also allow heater to cool down and have
collector vessel ready to collect escaping coolant.

Danger to life and health!

Warning!

Risk of scalding!

Caution!