9
Before using for the first time
■
Correct mechanical installation
must be verified.
■
Correct connection to the local
heating system must be veri-
fied.
■
It must be ensured that hot
surfaces are protected against
accidental contact.
■
It must be verified that the
electrical wiring of the units has
been carried out in compliance
with the applicable directives
and standards using the sup-
plied wiring diagrams.
■
The fan space as well as the
inlet and outlet area must be
checked for the presence of
foreign bodies.
■
The fan must be checked for
smooth operation.
■
Switch on the power to the
control unit (accessory) and
switch on the unit via the con-
trol switch of the control unit.
■
The direction of rotation of the
fan must be checked
The direction of rotation can
be changed by interchanging
two phases or using an exter-
nal control unit (accessory).
Commissioning
Draining if there is a risk of
frost
It is not possible to statically drain
the fin heat exchanger completely
in an installed condition.
If necessary, draining is only possi-
ble using compressed air.
Important information about frost
protection
To prevent frost damage, anti-frost
protection must be provided at
temperatures below 0°C.
Where systems in rooms at risk
from frost are not used for ex-
tended periods, under no circum-
stances must “only” water be
present in the heat exchanger.
In such cases, a suitable antifreeze
agent must be added to the hea-
ting medium (water) in a mixing
ratio that is adequate for the place
of use.
The hydraulic capacity loss must
also be taken into account.
■
It should be noted that when
using a speed control (acces-
sory) the power of the control
unit must correspond to the
total power of the connected
motors.
■
It must be ensured that all air
inlets and outlets are open.
ATTENTION
Frost damage to the fin heat
exchanger does not fall under
the warranty!
Water inlet
Water outlet
Draining the
heating/cooling
medium
Venting
Screwed connections
The three louvre segments in the
bottom part of the housing (ver-
tical blowing or suction) can be
individually adjusted via a control.
Air flow
The louvres on the side of the top
part of the housing (horizontal
blowing or suction) can be adju-
sted in 5 degree stages.
ATTENTION
Commissioning can only take
place when it is ensured that
mounting and electrical instal-
lation has been carried out in
compliance with the pertinent
requirements of the EC Direc-
tives.
Summary of Contents for PWL 101-3
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