E
LTG Incorporated · PO Box 2889 · Spartanburg, S.C. 29304, USA
Chilled beams HDF-us-OM (01/17)
Phone 864 599-6340, Fax -6344 · [email protected] · www.LTG-INC.net
Former editions are invalid · Subject to technical modifications
page 18 of 30
Installation, operating and maintenance instructions
Active chilled beams HDF-600, ceiling installation
5.3
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 sep
arate heating and cooling circuits or for 2-pipe operation.
The heat exchangers have been approved for a maximum
operating pressure of 145 psi (other pressures on re
quest).
Depending on the unit type, water connections are sup
plied in the following versions:
1. copper fitting with 0.47 in outer diameter.
This connection is only suitable for flexible
connections with quick coupling.
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
connection. Even though hoses to the heat exchanger
are preinstalled, connections might have loosened dur
ing 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 ex
changer pipes through bending or twisting. Pipe fittings
must always be flush. Tighten acc. to industry standards.
In order to adjust the water volume specified in the selec
tion data, a regulating device or restricting olive will be re
quired. If identical units with exactly the same water vol
ume and pressure losses are used, an individual
regulating device for each unit is unnecessary. In this
case, one regulating device for the entire line may be suffi
cient. 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 bub
bles. A ventilation per line is therefore 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 transitions,
straight-way or angle valves or hose connections are or
dered) is a complete compression fitting for unit-side wa
ter connection, appropriate to take copper pipes with a
1/2 in outer diameter, 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.
Due to possible condensation, the connections to the heat
exchanger for cooling should be insulated, e.g. using Ar
maflex insulation.
A
Isometric view
Heating
Cooling
Ø 0.47
Detail A
Содержание HDF-600
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