Bedienungsanleitung Webasto Dual Top ST 8 (Seite 5 von 19) (Englisch)

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Operating instructions | 4

9026381C Dual Top ST 6 _ 8 - OI 5 / 19

*The high-power option with 2,000 W cannot be used in sum-

mer mode (Dual Top ST 8).

3.2 Winter mode (heating without hot

water production)

In this mode the heater provides hot air.

Heat is produced by a diesel powered burner (Dual Top ST 6 and

8), an electric heater, or a combination of both

(Dual Top ST 8).

For Dual Top ST with a manual control panel:

The desired interior temperature can be adjusted with the in-

terior temperature selector (5 to 35 °C).

For Dual Top ST with a programmable control panel:

To adjust the desired interior temperature, push button (1)

or (2) (5 to 35 °C).

If the combustion burner is selected as heat source, then the

device automatically selects the burner setting, modulating

between 1,500 W and 6,000 W, depending on the output re-

quirement (calculated from difference between selected temper-

ature and current interior temperature).

The amount of heat is regulated to reach the preselected in-

terior temperature quickly. After which only a limited amount of

power is needed to maintain the interior temperature.

If electricity is used as source of energy, the electric heater heats

the air and water at low or high power, depending on the selec-

tion. Electricity is taken from an external power supply.

(Dual Top ST 8).

If the burner and the electric heater provide the heat, priority is

given to the electric heater. This means that the electric heater

runs at low or high power (depending on the selection) and the

burner provides the rest of the heat if necessary.

(Dual Top ST 8).

You can heat the interior with or without water in the

boiler.

3.3 Winter mode (heating with hot

water production)

In this mode the heater heats the interior and produces hot wa-

ter.

Heat is produced by a diesel powered burner (Dual Top ST 6 and

8), an electric heater, or a combination of both

(Dual Top ST 8).

For Dual Top ST heaters with a manual control panel:

The desired interior temperature can be adjusted with the in-

terior temperature selector (5 to 35 ºC).

For Dual Top ST heaters with a programmable control panel:

To adjust the desired interior temperature, push button (1)

or (2) (5 to 35 °C).

If the combustion burner is selected as heat source, then the

device automatically selects the burner setting, modulating

between 1,500 W and 6,000 W (Dual Top ST 6) or 1,500 W and

8,000 W (Dual Top ST 8), depending on the output requirement

(calculated from difference between selected temperature and

current interior temperature).

The amount of heat is regulated to reach the pre-selected in-

terior temperature quickly. After which only a limited amount of

power is needed to maintain the interior temperature.

A water temperature sensor controls the water temperature,

while an interior temperature sensor controls the interior tem-

perature.

Due to variable operating and environmental influences, small

water temperature deviations are possible.

Only for Dual Top ST 8: If you use electricity as source of en-

ergy, the electric heater heats the air and water at low or high

power, depending on the selection. Electricity is taken from an

external power supply.

If the burner and the electric heater provide the heat, priority is

given to the electric heater. This means that the electric heater

runs at low or high power (depending on the selection) and the

burner provides the rest of the heat if necessary.

3.4 Advanced functions

nMenu driven user guidance in 6 languages.

nProgrammable timer: The device has two freely program-

mable heating programs, 24/7.

See chapter4.5, "Programming timer" on page 11.

nRemote control by Webasto Telestart (optional control).

See chapter4.6, "Remote control" on page 13.

nBoiler drainage: possibility to drain the boiler manually from

the control panel or automatically for frost protection.

See chapter4.7, "Frost" on page 13.

nFrost protection mode: protects the boiler against frost.

See chapter4.7.4, "Frost protection" on page 15.

nTextual fault information: when a fault occurs, the control

panel displays a fault message with a fault number and

brief description to inform the user about the kind of fault.

See chapter7.1, "Fault Message output" on page 17.

4 Operating instructions

4.1 General

You must observe the operating instructions and chapter2,

"Maintenance and safety information" on page 3 before start-

ing. The vehicle owner is responsible for the correct operation

of the device.

CAUTION

Before first use, you must disinfect and rinse the entire

water supply system with clean, fresh drinking water

(see chapter6, "Maintenance" on page 16).

If the heater is not used, always drain the water contents to

avoid frost problems and to avoid contamination with micro-or-

ganisms.

Also drain the water before any repair or maintenance work on

the vehicle because the electrical safety / drainage valve may

open when the device is switched off!

NOTE

When the heater is new, there may be an unfamiliar

smell during the first couple of operation cycles.

NOTE

During continuous operation at low output levels,

Webasto recommend that the heater be operated at

full load approximately once a month for 15 minutes to

burn possible deposits in the burner.

4.1.1 Interior temperature sensor

To measure the room temperature, a remote interior temperat-

ure sensor is located in the vehicle. The location of the sensor is

determined by the installer, and depends on the vehicle type

and interior layout.

Webasto Dual Top ST 8 Seite 5

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