heater RENAULT ESPACE 2000 J66 / 3.G Technical Note 3426A Workshop Manual

Downloaded from www.Manualslib.com manuals search engine ENGINE AND PERIPHERALS
Engine and transmission assembly
10
10-5
Disconnect the air conditioning compressor pipe
connections.
Remove the complete heater exhaust line (if fitted).Remove:
–the exhaust pre catalytic converter,
–the engine tie-bar.
Disconnect the olives on the gearbox control cable.
10442M

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Engine and transmission assembly
10
10-7
Disconnect the lead from the engine compartment
connection unit; be sure to mark the location of the
various connections correctly.
Separate:
–a connector from the battery tray,
–the control solenoid valve from the turbocharger
regulation valve.
Fit hose pliers on the clutch master cylinder supply
pipe (on the brake fluid tank side).
Open the clutch slave cylinder bleed screw
(WARNING: you must use a counter-spanner at (C)
to compensate the effort of loosening/retightening
the bleed screw (A); see Technical Note 3345A).Disconnect:
Left side:
–the clutch slave cylinder high pressure union and
release the pipe from its clips,
–the water hoses connecting the engine to the tank
and the heater matrix element.
Right side:
–the diesel supply (1) and return (2) element from the
injection pump to the filter. It is essential that you plug
the openings with the appropriate plugs from kit
Part No.: 77 01 206 381,
–the inertia switch connector (3),
–the air conditioning circuit low pressure pipe on the
mounting bracket on the throttle body.
Under the vehicle:
–the booster pump connector; refit the electric wiring
harness to the engine.
15583R
18240-1M2
17527M1

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Inlet manifold
12
12-8
Inlet manifold
REMOVAL
The removal of the inlet manifold/cylinder head cover
requires the removal of the injectors and injection
harnesses. (See section 13 "Removing/refitting the
high pressure injection section").
Insert the mounting tool Mot. 1390 under the engine
and transmission assembly, positioning the right-hand
pads only beneath the engine. Lower the two unused
left-hand pads.Remove the right-hand suspended engine mounting
cover.
Undo the two clips on the connection hose (1)
between the inlet manifold and the damper unit.
Remove the pad (2). SPECIAL TOOLING REQUIRED
Mot. 1390 Engine and transmission
assembly mounting tool
TIGHTENING TORQUES (in daN.m)
Heater plugs 1.1
Manifold mounting stud 1
"Common-Rail" high pressure unions 2.5
15855M2

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Filling and bleeding
19
119COOLING SYSTEM
Filling and bleeding
There is continuous circulation in the heater matrices.
FILLING
It is essential to open the two bleed screws at the
top of the radiator and the cylinder head coolant
pipe housing outlet.
Fill the circuit through the expansion bottle opening.
Close the bleed screws as soon as the liquid starts to
flow in a continuous stream.
Start the engine (2 500 rpm).
Adjust the level by overflow for a period of about
4 minutes.
Close the bottle.
BLEEDING
Allow the engine to run for about 20 minutes at
2 500 rpm, until the engine fans(s) operate (time
necessary for automatic degassing).
Check the liquid level is at the "Maximum" marker.
DO NOT OPEN THE BLEED SCREWS WHILST THE
ENGINE IS RUNNING.
REFIT THE EXPANSION BOTTLE CAP WHILE THE
ENGINE IS WARM.
19-1

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Diagram
19
19-2
Diagram
SPECIFIC COOLANT CIRCUIT
1Engine
2Radiator
3"Hot" tank with degassing after thermostat
4Heater matrix
5Thermostat mounting
6Thermoplunger mounting
7Coolant pump
8Bleed screw
9Temperature switch
10 Heater (if fitted)
11 Oil cooler + "eco" oil filter
The expansion bottle valve rating is 1.2 bar (colour: brown).

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Additional heating
61
161HEATING
Additional heating
OPERATING PRINCIPLE
The vehicle with a G9T engine is fitted with an additional heating system as an option in some countries (Germany,
Nordic countries...). This comprises an engine coolant heater, mainly for starting when cold.
The heater is switched on if the following three conditions are met:
–starting the engine,
–air intake temperature less than 5 ˚C,
–coolant temperature less than 75 ˚C.
The heater is usually switched off when the engine is stopped or the coolant temperature reaches 85 ˚C.
The temperature is measured inside the heater.
The driver does not control operation.
The system is fitted with several safety features (see page 61-3).
The heater is connected as the outlet of the thermoplunger unit on the coolant circuit and operates independently of
this. It is fitted outside the left-hand side member in the front bumper.
61-1

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Additional heating
61
61-2
DIAGRAM OF THE D3WZ HEATER
1Air blower turbine
2Electric motor
3Heat exchanger
4Combustion chamber
5Spark plug
6Flame detector
7Temperature sensor
8Overheating switch
9Control unit
10 Combustion air intake tube
11 Burnt gas exhaust pipe
12 Dosing pump 13 Fuel filter
14 Main fuse
15 Interface
ACombustion air inlet
BExhaust gas outlet
CVehicle fuel circuit
DCoolant inlet (thermoplunger outlet)
ECoolant outlet (towards the heater matrix)

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Additional heating
61
61-3
TECHNICAL SPECIFICATIONS
The heater is fitted with an igniter appropriate for the
vehicle fuel.
It operates in two power levels:
–1˚) Low speed:
●Power: 1600 Watts,
●Fuel consumption: 0.2 l/hour.
–2˚) High speed:
●Power: 3300 Watts.
●Fuel consumption: 0.4 l/hour.
When the engine is started, the heater is operated at
high speed; circulation of the coolant inside the
exchanger is ensured by the vehicle coolant circuit.
A Temperature (˚C)
B Minutes
–Range a:
High speed.
–Range b:
Low speed.
–Range c:
Heater stop.
Coolant temperature measured inside the heater.SAFETY SYSTEMS
The system is fitted with several safety features; it cuts
out:
–if the difference in coolant temperature read by the
two internal heater sensors reaches 15 ˚C,
–if the coolant temperature reaches 120 ˚C (different
safety features than reading 85˚),
–if the flame detector does not detect combustion,
(notably the heater fuel pump),
–if the battery voltage is greater than 16 volts or less
than 10 volts.
Other safety devices:
–when the heater does not light 90 seconds after the
supply of fuel is started, the starting procedure is
repeated. If, during the following 90 seconds the
system still does not start, the emergency stop is
engaged.
–if the flame extinguishes during operation the starting
procedure is repeated. If the heater does not start up
in the following 90 seconds, the emergency stop is
engaged.
–in the event of overheating (lack of coolant,
incorrectly drained cooling circuit...), the overheating
switch reacts, the fuel supply is stopped and the
emergency stop is engaged. The heater can be
restarted after the source of overheating has been
eliminated and the heater has cooled sufficiently.
SWITCHING OFF
To temporarily disconnect the heater (operation with
engine running in an enclosed space, noises when
cold,...), disconnect the connector (15) (page 61-2).
If possible, check that the heater engages after it is
reconnected.
The main F49 (70 A) fuse on the engine
intercommunication unit supplies the additional
heating system.

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Additional heating
61
61-4
RIGID HEATER COOLANT PIPES
These are fixed to the body by bolt (A).
When refitting, tighten this bolt last after refitting and
tightening all the clips.
15966M1

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Additional heating
61
61-5
EXPLODED VIEW OF THE HEATER
Marking as on page 61-2.16 Cap