Dantherm VA-M40 MKII Service-Handbuch - Seite 17

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Control system,

Room thermostat

The room thermostat (accessory) will be placed inside the tent, to control the room

temperature. The wanted temperature will be set on the thermostat. If the temperature

falls below the set point the thermostat will automatically start up the burner. After

reaching the set point the thermostat automatically shuts off the burner of the unit

again.

See also "Set-up", page 23 (Thermostat) for further explanation.

CO monitor

The CO monitor (accessory) will be placed inside the tent nearby the warm air distribu-

tion duct. The CO monitor is factory set and will stop the complete unit if the CO con-

tent in the air is higher than the set point of the monitor. At the same time the monitor

will give an acoustical signal.

See also "Set-up", page 23 (CO-monitor) for further explanation.

Internal fan/limit

The internal fan thermostat control delays fan operation until the discharge air tem-

thermostat

perature has reached the preset factory temperature of 60 °C. This means that the fan

will not operate after burner start before the heat exchanger is heated to this tempera-

ture. After the burner stopped the fan will continue to operate and cool the heat ex-

changer/combustion chamber until the air discharge temperature has fallen to approx-

imately 30 °C.

The limit thermostat automatically stops the burner if the air discharge temperature ex-

ceeds 80 °C. The fan will continue. When the temperature has fallen by approximately 5

°C, then the burner will automatically switch on again.

Overheat protec-

The overheat thermostat operates when the heat exchanger is in danger of being dam-

tion

aged from an excess of temperature. This thermostat protector shuts down the fuel, ig-

nition and air supply systems. The red OT indicator lamp on the internal control box il-

luminates.

Follow this procedure to reset the system (after determining the fault):

Burner flameout

A flameout protector built in into the burner, activates when the burner flame is abnor-

protection

mal or unstable. This safety device automatically shuts off the fuel flow, ignition and

combustion air supply. The red reset button on the burner control box illuminates.

LED lights

There are four LED lights on the inside control panel which are indicating the state of

the unit:

CO override

OT failure

continued

LED

Color

Yellow

Red

Indication

Illuminates if no CO monitor is connected

Illuminates if the sensor in the heat exchanger registers

a temperature higher than the set point for this sensor.

In this case the unit will stop totally and can only be

started again after having pressed the reset button on

the OT thermostat

Continued overleaf