5
Unit description
The units are portable, directly
fuelled 2-stage fan-assisted heaters
(WLE) with a heat exchanger
and an exhaust gas connection
exclusively for commercial
applications.
The units are fuelled directly with
EL heating oil or Diesel fuel.
The units are fuelled by a separate
2-stage forced-air oil burner
and a 2-stage supply air fan and
are also suitable for temporary
outdoor installation.
The units are equipped with
a large-volume fuel pre-heater
(300 W) as standard.
All components have been
fitted behind a lockable door
to protect them against the effects
of weather and unauthorised
operation.
The units are equipped with
a noise-optimised and low-
maintenance high-performance
special-purpose fan and fitted
switching and control devices.
The units have been designed
for 2-stage operation as standard
and have a number of useful
optical indicators on the control
cabinet.
The units consist of a stable frame
structure supported by robust
stainless steel transport runners.
The units conform to
the fundamental health and safety
requirements of the appropriate
EU stipulations and are simple
to operate.
Locations at which units are
used
As mobile, directly fuelled fan-
assisted heaters, the units deliver
instant heat.
They are designed exclusively
for heating and ventilation
purposes in a commercial setting.
The units may be used
for the heating, temperature
adjustment or drying of:
■
Warehouses
■
Exhibition halls
■
Trade fairs
■
Lightweight construction halls
■
Large tents/marquees
■
Large construction sites
Installation instructions
The safety regulations of the accident
prevention and insurance associations,
the respective regional building
regulations and the combustion
appliances regulations apply
to operation of the units.
NOTE
Overpressure and underpressure
in the installation area
should be avoided as this will
inevitably lead to combustion-
related faults.
■
The units may only be installed
and operated in areas where
the units can be supplied
with an adequate amount
of air for the combustion
and the exhaust gases can
be routed to the outside via
exhaust gas ducting.
There is enough natural air
supply for the combustion if,
for example, the space in m
3
is at least 10 times the nominal
heating capacity in kW of
all of the units operating in
the space and if the natural
circulation of air is guaranteed
by windows and doors.
■
Ensure that there is an adequate
fresh air supply appropriate to
the respective forced-air burner
capacity (see name plate).
The forced-air oil burner
may need to be fitted with
a separate air supply for
combustion
■
The fresh air supply required
for trouble-free combustion
must be ensured. It is practical
to have the fresh air supply
provided by windows and
doors or through appropriately
dimensioned openings in
the outside wall
Operating sequence
If the units are set to heating mode
1 or 2 then the forced-air burner
starts automatically.
After the burner has run for
1 minute the supply air fan
switches on. Warm air is blown
out.
The temperature monitor “TW”
monitors the internal temperature
of the unit.
When operating with a room
thermostat this process is
repeated automatically depending
on the heat demand.
After switching off the units via
the operating switch or the room
thermostats the supply air fan runs
to cool the combustion chamber
with the heat exchanger for
a certain time and then switches
off. This process may be repeated
several times.
