ELTG Incorporated ·PO Box 2889 ·Spartanburg, S.C. 29304, USA
Chilled beams HDF-us-OM (01/17)
Phone 864 599-6340, Fax -6344 ·info@LTG-INC.net ·www.LTG-INC.net
Former editions are invalid ·Subject to technical modifications page 4 of 30
Installation, operating and maintenance instructions
Active chilled beams HDF-600, ceiling installation
Continuation 1.2 Operating safety instructions
The casing on site also serves as a protec
tion and should be removed for mainte
nance and cleaning only.
Avoid any additional load to the unit or the
suspensions since stability might be insufficient.
The unit must be checked by an expert immediately
- if it has been mechanically damaged
- it is suffering from a water damage,
- if the suspension or the casing show clear signs of
corrosion or ageing.
Do not put the unit back into operation before all neces
sary maintenance and repair has been performed!
1.3 Intended use
The HDF unit is intended for use in closed rooms.
It is designed for ambient temperatures of 41 °F to 104 °F
and a maximum relative humidity of up to 90% (non-con
densing). The maximum admissible supply temperature
is limited to 176 °C.
Any other operating conditions require the express and
written permission of LTG Aktiengesellschaft.
LTG Aktiengesellschaft does not assume
responsibility for any damages resulting
from unintended use.
2. Delivery, transport, storage
The unit requires dry and dust-free conditions during
transport, storage, installation, and operation.
The unit is supplied in corrugated board boxes secured
with straps.
Units are stacked on Euro or single trip pallets and se
cured with straps. Pallets may be moved using forklifts or
cranes.
Do not remove the packaging unless immediately prior to
installation on site to protect the unit from pollution and
damages.
LTG Aktiengesellschaft will not take re
sponsibility for any pollution of or dam
ages to the unit.
2.1 Transport instructions
Handle units appropriately and with care during trans
port. Do not throw, let drop to the ground or bump into
other items or walls.
Make sure that units are safely fastened during transport
and avoid damage through other items.
It is recommended to always have units handled by at
least two persons.
The packaging is not weather-resistant.
2.2 Storage
Make sure that the units are entirely protected against
weathering, humidity, and other adverse conditions that
might result in damages during storage.
The storage location must meet the following climatic re
quirements: Temperature between 41 °F and 131 °F with
a relative humidity of 90 % max. (non-condensing).
3. Function
The active chilled beam HDF is a ceiling-mounted induc
tion unit for ventilation and individual temperaturecontrol
based on the induction principle, i.e. without the use of a
fan, using processed outside air.
The low construction height (79 in) allows installation in
false ceilings offering limited space. The thus resulting
low difference in height between the heat exchanger and
the ceiling level has been considered in the chilled beam's
design which is suitablefor dry cooling without dehumidi
fication and condensate drainage.
The chilled beam is suitable for installation in grid ceilings
measuring 2 x 2 ft, 2 x 4 ft, 24.6 x 24.6 in or 24.6 x 49.2 in
and may be positioned in or adjacent to Tbar profiles.
With grid and plasterboard ceilings, installation may be
edgetoedge or overlapping.
During operation, the primary air is 100% pretreated out
side air via a central central AHU. It assures the use-de
pendent basic ventilation using outside air, e.g. in con
formity with DIN EN 13779 or DIN EN 15251
recommendations. Through uniformly arranged nozzles
over the entire unit length, the primary airis led in an injec
tor-type diffuser which induces secondary air. Depending
on the room load, this secondary air is either heated or
chilled in a 2-pipe or 4-pipe heat exchanger.
The supply air, a mixture of primary and secondary air, is
uniformly diffused to 2 or 4 sides into the room via preset,
divergent ceiling jets.
Room air humidity is controlled through the centrally de
humidified supply air avoiding involuntary dehumidifica
tion inside the chilled beam. The 2-pipe system may be
used for either cooling only or change-over operation with
cooling/reheating. The 4-pipe system with independent
water circuits automatically switches from cooling to
heating and vice versa.
Thetypeofconstruction,whichprovidescompletesepa
ration from the ceiling cavity, suppresses sound trans
mission from adjacent rooms (transmission sound insu
lation).
