AT 300-US series
40.020.941 - rev. 04 - 2011
7
English
2
INTRODUCTION
2.1
Purpose
These stationary used oil heaters are direct
fired heaters with thermal protection and
connections for a flue with rain cap and
optional room thermostat.
The AT 307 is equipped with a hot air fan.
The hot air heaters have been tested at sea
level at a temperature of 68
°
F.
2.2
Working principle AT 306
The stationary used oil fired heater is
equipped with an electric motor for driving the
fuel pump.
Diesel oil is poured manually on a burner
dish, which is ignited with a burning paper
pellet. As soon as the burner dish is at the
right temperature, the pump thermostat
activates the fuel pump; the control light
flashes on. The fuel pump pumps the used oil
onto the burner dish. The used oil evaporates
due to the temperature of the burner dish.
The gas vapour burns.
The pump thermostat switches off the fuel
pump when a failure causes the heater to
overheat.
The fuel pump is switched off when the
heater is switched off.
The fuel supply has an overflow that ensures
that the used oil flows back into the fuel tank
when the fuel pipe is blocked.
The overflow protection switches off the fuel
pump when the burner dish overflows.
2.3
Working principle AT 307
The stationary used oil fired heater is
equipped with three electric motors.
The first electric motor drives a fuel pump,
which pumps up the fuel from the fuel tank.
The second electric motor drives the
combustion air fan, which blows the
combustion air into the combustion chamber.
The third electric motor drives the hot air fan,
which extracts the hot air around the
combustion chamber. The hot air is blown
into the space to be heated.
Diesel oil is poured manually on a burner
dish, which is ignited with a burning paper
pellet. As soon as the burner dish is at the
right temperature, the pump thermostat
activates the fuel pump; the control light
flashes on. The fuel pump pumps the used oil
onto the burner dish. The used oil evaporates
due to the temperature of the burner dish.
The gas vapour burns.
The maximum thermostat switches off the
fuel pump when a failure causes the heater to
overheat.
The fuel pump is switched off when the
heater is switched off.
The fan thermostat switches on the motor of
the hot air fan, which causes the hot air to be
blown from the heater into the space to be
heated.
The hot air fan runs until the fan thermostat
switches off the fan: this allows the heater to
cool down.
The fuel supply has an overflow that ensures
that the used oil flows back into the fuel tank
when the fuel pipe is blocked.
Warning
•
Use only the following types of
fuel:
•
Automatic transmission oil
•
Crankcase oil
•
Diesel oil
•
Hydraulic oil
•
Domestic fuel oil
•
Do not add the following
materials to the used oil:
•
Anti-freeze
•
Carburettor cleaner
•
Paint thinner
•
Parts washer solvents
•
Gasoline
•
Transformer oil
•
Oil additives
•
Any other inappropriate or
hazardous material
•
Do not fill the tank while the
heater operates.
