Bedienungsanleitung Webasto Montreal (Seite 5 von 8) (Englisch)

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Webasto Charging the A/C system | 6

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Fig.4: Refrigerant bleeding

Vehicle interior Bleeding in case of refri-

gerant leakage

Vehicle floor Enclosure in case of off-

floor installation

Vehicle exterior

üAvoid making connections to the refrigerant circuit inside

the passenger compartment of the vehicle. In case the con-

nections are inside the vehicle, the joint must be segreg-

ated from the interior using seals and/or sealant and open

to vent outside the vehicle any eventual refrigerant leak.

üThe venting opening must be kept away from hot surfaces

and / or ignition sources.

üAvoid locating refrigerant connections e.g. hoses to fittings,

fittings to components (valves, filters, pressure switches,

safety valves, etc.) and charge ports in areas close to hot

surfaces (e.g. exhaust pipe, catalyst, engine block, etc…) or

elements likely to generate sparks or electric arcs.

üAvoid the installation of refrigerant solenoid valves inside

the vehicle.

uIn case not already installed: always install over-pressure

safety valves venting in area far from hot surfaces, power

electric lines and any other ignition source.

5.4 Installation

Fig.5: Mechanical installation

The unit comes prepared with 2 M6 rivet-nuts (1) on each side.

uSelect a suitable location for the unit.

uDesign brackets that firmly locate and hold the unit to the

vehicle interior.

The brackets should ensure stiffness and avoid vibrations

and potential cracks.

uMount the brackets on the unit with M6 bolts. Nominal

torque: 5Nm.

üMake sure you can work safely on the vehicle’s refrigera-

tion system.

uConnect the expansion valve to the vehicle’s refrigeration

circuit.

üFor a HVAC unit: Make sure you can work safely on the

vehicle’s cooling system.

uFor a HVAC unit: Connect the heater to the vehicle’s cooling

circuit.

5.5 Electrical connections

Fig.6: Electrical connections

1 + (red) 3 Compressor (yellow/green)

2 Gnd / - (black)

uMake the electrical connections according Fig. 6. See

„chapter9 for power and fuse requirements.

Avoid fitting relays, fuses and switches close to refrigerant

connections.

uInstall the control knobs/switches in a convenient location.

6 Charging the A/C

system

DANGER

Danger of fire

Carry out refrigerant charging operations in ventilated

areas, away from open flames, hot surfaces and any

other ignition sources.

Take into account these measures and all those aimed

at reducing the risk of ignition of the refrigerant in case

of a leakage.

Refer to SAE J 2845.

NOTE

Only use recovery/recycling/recharging equipment for

flammable refrigerants compliant to SAEJ2843.

uPerform a high pressure leak test with nitrogen. Accurately

solve any eventual leak to assure circuit tightness.

uPerform an evacuation test.

If present, activate the solenoid valves during the leak-test, va-

cuum and charge procedure to ensure the correct pressurization

of the entire system.

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