Introduction; Working Principle - THERMOBILE AT 400 Manual Del Usaurio

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.
2

INTRODUCTION

2.1 Purpose
These stationary used oil fired heaters are
direct fired heaters with thermal protection,
heat exchanger, combustion air fan, flue
stack connection with T-piece and draught
regulator and hot air fan.
The AT 500 is equipped with a connection for
a room thermostat
The hot air heaters have been tested at sea
level at a temperature of 68 °F.
2.2

Working principle

The stationary used oil fired heater is
equipped with three electric motors.
The first electric motor drives a fuel pump,
which extracts fuel from the fuel tank.
The second electric motor drives the
combustion air ventilator, which blows the
combustion air into the combustion chamber.
The third electic motor drives the hot air fan,
which draws the surrounding air around the
combustion chamber and heat exchanger.
The hot air is blown into the space to be
heated.
AT 400 - 500-US series
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. A thermostat switches
on the hot air fan motor to blow hot air into
the space to be heated.
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 hot air ventilator runs until the
combustion air thermostat switches off the
ventilator: this allows the heater to cool down.
The maximum thermostat switches off the
heater when the temperature gets too high.
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
A Cover
B Combustion chamber
C Heat exchanger
D Maximum thermostat
E Thermostats
F T-piece with draught regulator
G Hot air fan
H Combustion air ventilator
I Fill filter
J Control panel
K Fuel tank
L Drain cock
M Fuel filter
N Fuel pump
O Identification plate
P Return line
Q Drawer
R Fuel pipe
S Fuel supply pipe
40.020.943 - rev. 04 - 2011
Main components of the stationary
used oil fired heater (fig. 3)
English
7