15
400V unit versions
A room thermostat or a day/night
temperature control is connected
to the corresponding terminal
blocks in the control box for these
versions.
The connection must be made as
follows:
Remove the factory cable bridge
and connect the terminals with
the corresponding wires of the
respective control system.
The respective separate
connection diagrams of the
control system and the unit must
be observed!
Terminal block
X2
■
It is essential to set the burner
to the full heat load of the unit
■
The separate operating
instructions for the factory-
supplied burner must be
observed
■
When using forced-air burners
from other manufacturers, it
is essential to ensure that they
are suitable for the unit (WLE
version)
Gas connection
Adequate gas pressure and
quantity of gas, in accordance
with unit performance, must be
continuously available during unit
operation.
■
Installation of the gas
connection should be
performed only by authorised
specialists
■
The DVGW Code of Practice
G 600 for gas-fired fan-assisted
heaters and the TRF for liquid
gas must be observed
■
Gas pressure regulators and
shut-off valves must be
provided by the customer as
a matter of principle
■
The cross-section of the pipe-
work should be determined in
accordance with the connection
value of the unit, the total pipe-
work resistance and the amount
of gas supply pressure
factory-made
cable bridge
13 12
NOTE
Before initial commission-
ing, the gas supply line must
be thoroughly cleaned and
checked for leaks!
Heating oil connection
Sufficient and professional fuel
supply must be ensured.
■
The suction pipe in the heating
oil tank must be fitted with
a foot valve as a matter of
principle
■
Even at low outside
temperatures it is necessary
to ensure that there is an
adequate supply of heating oil
that is capable of flowing.
Depending on the quality of the
heating oil, paraffin formation
can start from approx. 5°C.
Appropriate measures must be
taken to avoid this!
Burner installation
The forced-air burner supplied
by the factory is mounted on the
front of the unit with a clamping
flange.
Observe the following points:
■
Only type-tested forced-air oil
burners per DIN EN 267 in WLE
design or forced-air gas burners
(per DIN EN 676) may be used
■
A power limitation for 1-stage
burner operation (up to 70 kW)
is not required for fan-assisted
heaters (WLE)
CAUTION
Assembly, set-up and mainte-
nance work on the gas supply
may only be carried out by
specialist personnel authorised
by the gas supply company!
!
