Cab ventilation

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68.Cab ventilation

1. Ventilation fan switch 37*

Turn switch to operate the 3-speed cab fan.

The fan must be used together with both the heater unit and the air conditioner. The fan must be on (1st, 2nd or 3rd speed) to operate the air conditioner. 2. Thermostat for the air conditioner. 266*

Selects cab temperature during air conditioner operation.

Turning clockwise increases cooling.

Works only together with the air conditioner switch. 3. Heater regulator. 267*

Adjust air heating with the knob. The air is heated by the engine coolant. Turning clockwise increases heating. 4. Air conditioner switch 35*

Push the switch to activate the air conditioner system.

A compressor (engine mounted) and a cooling element cools the air when the engine is running and this air conditioner switch is set to on. Regulate the efficiency with the thermostat (2). 5. Air conditioner indicator 35*

Lights when the air conditioner is activated.

The intake air is filtered before it enters the cab. All nozzles are adjustable, and air may be directed in the desired direction. It is also possible to close the nozzles.

General about heat and ventilation

•Keep the doors and window shut. •Always open the nozzles when operating the dump truck. •Direct the air flow so that it does not blow straight on uncovered skin. •Always turn the fan on (1st, 2nd or 3rd speed) when operating the dump truck and adjust fan speed until it feels comfortable in the cab. •When using air conditioner, do not direct the air flow directly towards the windows, it can cause steamy windows.

Setting heat and ventilation

Without air conditioning

How to get...... ......maximum heat:

•All nozzles fully open. •Heater regulator (68.3) on max., i.e right position •Fan switch (68.1) on max, i.e. speed 3. If condensation forms, see "......remove condensation from all windows.

...... pleasant working temperature:

•All nozzles fully open. •Heater regulator (68.3) on max., i.e. right position •When the correct temperature has been obtained, turn heater regulator (68.3) (left) until you maintain the desired temperature. •Fan switch (68.1) set to speed 1 or 2.

......fresh air in cab:

•All nozzles fully open. •Heater regulator (68.3) on min., i.e. left position •Fan switch (68.1) on max, i.e. speed 3.

How to get...... ......rid of condensation and ice on all windows:

•Direct the nozzles towards the windows. •Heater regulator (68.3) on max., i.e. right position •Fan switch (68.1) on max, i.e. speed 3

This instruction is a basic recommendation, and each driver should learn to set and regulate the heating/ventilation unit, to give the correct temperature without draughts and achieve best working environment.

CAUTION

Ensure good ventilation! Do not operate the dump truck without ventilation, or with the cab entirely closed, unless the fan is on. Poor ventilation can cause drowsiness (lack of oxygen).

Air conditioner

How to get...... ......a pleasant temperature quickly:

•All nozzles fully open. •Heater regulator (68.3) on min., i.e. left position •Thermostat (68.2) on max., i.e. right position •Fan switch (68.1) on max, i.e. speed 3. •Switch (68.4) pressed down, i.e. air conditioner engaged.

When the temperature has been lowered to the level you want:

•Turn the fan switch (68.1) and the thermostat (68.2) to the position which maintains the desired temperature.

...... rid of air humidity in the cab:

•All nozzles fully open. •Heater regulator (68.3) on max., i.e right position •Thermostat (68.2) on max. , i.e right position •Fan switch (68.1) on max., i.e speed 3. •Switch (68.4) pressed down, i.e air conditioner engaged. •In very cold countries, use of the air conditioner will retain humidity in cab air which may become too dry through heating.

This instruction is a basic recommendation, and each driver should learn to set and regulate the air conditioning unit, to give the correct temperature without draughts and achieve best working environment.