SystemAir DXRE, Руководство пользователя

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4
DXRE
GB
Design
The DXRE is used for central cooling of the ventilation air in a
ventilation system. DXRE can also be used with a outdoor unit
and it´s controller which switches between heat and cold. DXRE
has a coil of copper tubes and hydrophilic coated aluminium fins.
The stainless steel drip tray leans towards the drain connection.
Same model for left-hand or right-hand installation.
Mounting ventilation duct
The fitting must be done so that the drip tray, droplet eliminator
and condensate outlet are easily removable and the coil accessible
for cleaning (see also under Cleaning).
DXRE can be installed either upstream or downstream of the fan
unit in a horizontal duct, and it´s either bolted to the duct system
or connected by means of slip clamps. When fitted downstream
of the fan, it should be installed so that the airflow across the coil
will be uniform. We recommend that the distance to or from a
duct bend, fan, damper, etc. should be at least the same as the
diagonal dimension of the duct.
In order to ensure maximum cooling capacity and reliable opera-
tion, it is inadvisable to install it immediately downstream of the
fan outlet or a duct bend.
When installed upstream of the fan, check that the fan motor and
other components are suitable for the humid air downstream of
the cooler. Max. air velocity without droplet eliminator: 2.5 m/s
when used as cooler.
The G ½” condensate outlet should be connected across a water
trap in order to prevent air leakage.
N.B. The size of the outlet should be determined so that no stag-
nant water will remain in the drip tray.
An efficient air filter is recommended for the system.
When used as a cooler, DXRE and the ducts carrying cooled air,
must be insulated so that no condensate will form on the outside.
Connection of refrigerant circuit
Installation must be preformed by a certified refrigerant techni-
can. The connection is made by soldering or press fittings that are
approved for the purpose. Use nitrogen inside the copper tubes to
avoid oxidation during soldering.
Make sure that DXRE connections are not subjected to expansion
forces in the system or to the deadweight of the pipe system.
Make sure that the gaskets are not subjected to excessive heat dur-
ing brazing.
Design data
Max. operating pressure: 4.29 MPa (42,9 bar).
Test pressure: 4.8 MPa (48 bar).
All coils are pressure tested and tested for leakage. On delivery,
the coil is pressurised with dry air.
Capacity heat-cooling
Calculation of heating and cooling capacity is done via our web-
based calculation program, or get in touch with our sales division
for assistance.
To fit the droplet eliminator
Droplet eliminator DE must be installed downstream of the cool-
ing coil in the duct cooler.
Fitting is done according to seperate instruction.
Connection refrigerant
DXRE 400x200-3-2,5
Gas
Liquid
Gas
DXRE 500x250-3-2,5 -
DXRE 1200x600-3-2,5
Liquid