Original Instructions for Installation, Use and Maintenance
Active Chilled Beam Type HDC
Section:
Page:
Date:
AG--B 213.1e
17
Feb. 2010
The Innovation Company
LTG Aktiengesellschaft
E
LTG Aktiengesellschaft
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Grenzstraße 7
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D-70435 Stuttgart
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+49 (0711) 8201-0
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Fax -720
Internet: http://www.LTG-AG.de
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E-Mail: [email protected]
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Printed in Germany
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Ausgaben mit früherem
Datum werden hiermit ungültig
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Technische Änderungen vorbehalten
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Former editions are invalid
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Subject to technical modifications.
4.3
Water Connections
Remove the heat exchanger plugs prior to water connection!
Units are provided with heat exchangers with copper tubes and aluminum blades for 4--pipe operation with
separate heating and cooling circuits or for 2--pipe operation.
The heat exchangers have been approved for a maximum operating pressure of 10 bar
(other pressures on request).
Depending on the unit type, water connections are supplied in the following versions:
1. copper fitting with 12 mm outer diameter.
This connection is only suitable for flexible connection with quick coupling.
Always follow the installation instructions for the water connections attached
to each unit.
Connections must be strainless.
Connecting lines must be able to expand.
Attention:
Prior to allowing water to enter the unit the flexible water connection hoses
will have to be checked for proper and leakproof fixation. Even though hoses
to the heat exchanger are preinstalled, fixations might have loosened during
transport or installation of the unit on site.
You may use off--the--shelf control valves and shut--off valves.
When tightening the fittings, avoid damaging the heat exchanger pipes through bending or twisting.
Pipe fittings must always be flush.
In order to adjust the water volume specified in the selection data, a regulating device or restricting olive will
be required. If identical units with exactly the same water volume and pressure losses are used, an individual
regulating device for each unit is superfluous. In this case, one regulating device for the entire line may be
sufficient. Otherwise, a regulating device will be required for each heat exchanger.
If removal of a heat exchanger without draining the entire system is a requirement, two or four isolation valves
will have to be provided for each unit. You may use off--the--shelf shut--off valves.
The unit fitting will only be provided with an integrated vent if specifically asked for. The water speed inside
the heat exchanger is usually sufficient to carry along air bubbles and one ventilation device per line is there-
fore appropriate. In a case of emergency, the line may be ventilated by slightly loosening the standard fitting
of the unit.
Included in the unit price and also in general provided with the unit -- (unless special fittings such as transi-
tions, straight-way or angle valves or hose connections are ordered) is a complete compression fitting for unit-
side water connection, appropriate to take copper pipes with a 12 mm outer diameter, wall thickness of
0.7 -- 1.0 mm, suitable for connecting hoses. The union nut is fixed to the heat exchanger pipe’s flared end,
while olive and banjo bolt will be delivered in packs of 2 or 4 -- according to type of unit -- in a bag attached
to the unit.
Exception: The water connections of units HFG--4 and HFS--4 are provided with a sleeve with fixed internal
thread or a soldered--on smooth 12 mm tube to take a quick coupling.
Due to possible condensation, the connections to the heat exchanger for cooling should be insulated, e.g. using
Armaflex insulation.
