4
REMKO PWL
Safety information
The units were subjected to ex-
tensive material, functional and
quality inspections and tests prior
to delivery.
The units can however constitute
a hazard if used improperly by
untrained persons or not for the
intended purpose.
Always observe the following safe-
ty information:
■ The locally applicable building
regulations must be observed.
■ The operator is responsible for
correct installation of the units,
correct electrical installation and
safe operation of the units.
■ The units must be installed
and operated in a manner that
excludes any risk to persons
through radiated heat.
■ The units must only be attached
to constructions or ceilings with
sufficient load bearing capacity.
■ Attachment must take place
using suitable anchors to be
attached to the unit.
■ Only trained specialists may
install and connect the heating
medium, establish electrical con-
nections and carry out mainte-
nance.
■ The units must not be installed,
mounted and operated in loca-
tions subject to fire and explosi-
on hazards or exposed to dust-
laden/aggressive atmospheres.
■ The units must be installed out-
side traffic zones, e.g. also the
operating areas of cranes.
Planning information
For an optimal room temperature,
several basic rules must be follo-
wed for room heating and cooling
planning.
Heating mode
The following data is required for
room heating planning:
■ Room heat demand
Q
H
(kW)
■ Basic room dimensions
(length, width, height)
■ Required air change
■ Required room temperature
■ Required heating medium tem-
perature for flow and return
The air inlet temperature of the
units should not be below 34°C
and not above 42°C.
At an outlet temperature below
34°C, there is a risk of
unpleasant, cool draughts in the
area of workplaces.
If the outlet temperature is abo-
ve 42°C, an increased upcurrent
of hot air will occur in the ceiling
area.
The range of the hot air current is
reduced and the air in the room
is inadequately penetrated by the
hot air current and intermixed.
Undesired “cold air zones“ form
in the room, and in contrast, an
excessive cushion of hot air forms
in the ceiling area.
This causes unnecessary heat
losses.
Cooling mode
The following data is required for
room cooling planning:
■ Room cooling load
Q
k
(kW)
■ Basic room dimensions
(length, width, height)
■ Required room temperature and
possible relative humidity
■ Required cooling medium tem-
peratures for flow and return
To avoid unpleasant draughts at
workplaces, the air outlet tem-
perature in cooling mode should
be maximum 6 – 8 K below the
ambient temperature.
An excessive temperature dif-
ference (> 8 K) can lead to the
formation of unpleasant “cold air
zones”.
The circulated total air volume of
the units per hour should be about
4 to 5 times the room volume.
With inadequate air circulation
volume, the required room climate
is achieved very slowly and with
delay.
An excessive air circulation volume
is preferable since the system is
able to respond more dynamically
and effectively.
The air circulation volume can be
increased using external aids (e.g.
ceiling fans).
