Ford Galaxy / Ford S-MAX. Manual — part 687

Description

Evaporator inlet line - front air conditioning system

Evaporator inlet line - front air conditioning system

Evaporator inlet line - additional air conditioning system

Evaporator outlet line - additional air conditioning system

Air distribution - additional air conditioning system

Description

Housing - additional air conditioning system

Auxiliary climate control module

Air ducts.

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Air outlet vents

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Auxiliary Climate Control - Electric
Booster Heater

S-MAX/Galaxy 2006.5 (02/2006-)

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Description and Operation

Electric booster heater

In diesel vehicles which give off little residual heat, a booster heater is used to heat the
passenger compartment rapidly in the case of low ambient temperatures.

If the interior temperature is set to "HI" on the control assembly of the climate control or
the heater controls are set to their highest setting then the DEATC (electronic temperature
control) module sends an "electric booster heater ON" request signal via the MS CAN bus to
the generic electronic module (GEM). If a manual air conditioning system is installed, the
signal is transmitted via a conventional cable connection.

The GEM switches the electric booster heater according to the available alternator capacity.

The electric booster heater consists of three individual heating elements, which are
incorporated into a single housing.

The electric booster heater electronics activates three output stages depending on a pulse
width modulated signal (PWM) generated by the GEM. The output stages switch the three
heating elements of the electric booster heater ON or OFF individually, whereby the heating
periods of the individual elements can overlap. Due to the variable switch-on duration,
continuously variable temperature control is possible. The overall heating power of the
three heating elements is linearly proportional to the PWM signal. If the PWM signal is
below 10% or above 95%, the electric booster heater is not activated.

Auxiliary Climate Control - Fuel Fired
Booster Heater

S-MAX/Galaxy 2006.5 (02/2006-)

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Description and Operation

Principles of Operation

The fuel-fired additional heater provides extra heat to the passenger compartment if the
heat emitted by the engine is not sufficient (boost heater function).

By burning fuel, the fuel-fired additional heater generates heat which is conveyed via the
coolant circuit to the engine and the passenger compartment.

If a fuel-fired booster heater is fitted, there is no electric booster heater

Schematic representation - vehicles with non-programmable additional heater

Description

Vehicle engine

Fuel pump module

Fuel tank

Heat exchanger with blower motor

Auxiliary Heaters

Exhaust pipe

Air inlet

Schematic representation - vehicles with programmable additional heater

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