Fresh air box ALB 125 EH and ALB 200 EH
INSTALLATION AND OPERATING INSTRUCTION
NO. 91 640
To ensure safety please read the following
instructions carefully before proceeding.
RECEIPT
Please check consignment immediately on receipt
for accuracy and damage. If there is a damage, it has
to be reported to the forwarder immediately. Delay in
notification may invalidate any possible claim.
STORAGE
For storage over a longer period of time the following
steps have to be taken to avoid harmful exposures
(except of the heating element): protection by a dry,
airproof and dustproof packing. The storage area
must be dry and free from vibration or large variations
in temperature. For storage over a few years or a
motor at stillstand an inspection of the bearings or if
necessary a replacement of the bearings has to be
carried out: The slated fan performance has been
measured in accordance with VDE 0701 / VDE 0530.
The measured performance on site may differ depen-
ding on the installation. In case of reshipment (espe-
cially over longer distances) it has to be assured that
the packaging is suitable for the transport type and
the route of transport.
Damage due to transportation, storage or improper
installation and operation are not valid for warranty
claims.
APPLICATION / OPERATION
For a pleasant room climate of inlet external fresh air
which is filtered and automatically heated to a given
temperature, for direct installation in ducting. For
various applications in commercial and industrial
areas.
NOISE LEVEL
The noise levels in the catalogue can differ depending
of the type of installation because the sound pressure
depends of the absorption capacity or the installation
location. Noise reduction can be achieved by
application of an attenuator.
CONTACT SAFETY
When installing the safety regulations have to be
followed. Contact with rotating devices must be
avoided; if necessary protective guards have to be
installed according to DIN EN ISO 5801. The fan has
to be protected of foreign objects which might fall in-
to it. In case of an accident due to missing protect gu-
ards the installer is responsibile.
AIR FLOW DIRECTION AND
DIRECTION OF ROTATION
Rotation and air flow direction (no reverse operation
possible) is marked by arrows on the unit (direction of
rotation = red, air flow direction = blue). The air flow di-
rection is defined by the application. Wrong direction
of rotation leads to a performance loss, increa-
ses the noise level and the current consumption
which may damage the motor.
PERFORMANCE DATE
– Electrical values
The name plate gives information about the
electrical details and should be checked to ensure
that it matches site condition.
DESCRIPTION
Information:
The maximum current in control mode can deviate
from the nominal current, or be higher!
The compact flat casing is isolated thermally and
acoustically and equipped with an air filter, fan, heater
with controller and electrical terminal box.
What is needed for external control element:
– Operation switch B-ALB
– A temperature sensor for installation in rooms
(TFR-ALB)
or
– Duct sensor (TFK) for installation in intake ducts.
– DDS Differential pressure switch for filter control
These elements have to be ordered separately
(accessory).
·
Casing
Made of 50 mm thick mineral wool insulation and
faced with a fibre glass sheet to protect against dust.
Easy removable lid with four spigots have rubber seals
and match standard duct sizes. Two connections are
provided for the DDS switch (accessory) on each side.
·
Filter
A large filter from washable plastic fibre, strengthened
for long cleaning intervals is free accessible by
taking-off the casing lid.
Basic version is class G4. Filter of higher performance
is M5 and F7 (accessory) are available alternatively.
Note the reduction of the air flow (see performance
curves).
·
Fan
The speed can be switched in three steps by the
operating switch. Low noise and a powerful centrifugal
fan in a spiral casing of galvanised steel. Motor /
impeller unit is swing out and free accessible for servi-
ce. Driven by maintenance-free external motor. Ther-
mal contacts are integral. Protection class IP 44.
·
Motor protection
By thermal contacts connected in series (not
automatic re-setting).
To reset the thermal contacts the main supply must
be switched off (cooling time is approx. 15 minutes).
Important!
Frequent activation of the thermal contacts
means the system may not be run on and has to be
checked by a qualified person.
Information:
The fans type ALB 125 C EH2 has a for-
ward curved centrifugal impeller. They have the pro-
perty that the required power decreases while the
pressure difference increases. A lower current con-
sumption than the nominnal current indicates no out-
put deficit.
·
Electric heater battery
Enclosed heater element made from high-grade
stainless steel with low surface temperature which
heats the fresh air to the given temperature.
The heating can be activated by the operation switch
(accessory). Control is by the electronical pulser
(integrated in the unit) with sensors and setpoint
measuring. The performance is controled stepless
with a constant comparison between the setpoint
and the measured temperature of the duct sensor.
·
Safety control
The electrical heating will only run if the fan is on and
is a minimum air flow (step 1 on the operating switch).
When a temperature of 80 °C is exceeded the hea-
ting is switched off by an overheat thermostat (self
resetting) and after cooling down the thermostat
switch on again.
Additionally the heating is switched off by two
independent, manual resettable overheat thermostats
when a temperature of 120 °C is reached and stays in
this condition until an authorised electrician resets it.
(The EH5: one thermostat effects one heating ele-
ment).
Important!
Frequent activation of the overheat
thermostats point to a problem. The system should
not be run on and has to checked by a qualified
person.
