LIQUID-COUPLED HEAT EXCHANGER ECONET
®
Installation & Maintenance Manual
8
FläktGroup DC_9010GB 20180327_R0 Specifications are subject to alteration without notice
ECONET
®
ASSEMBLY AND INSTALLATION
COIL INSTALLATION
The coils are installed in the air handling units at the factory.
The coils must be connected as a counter-flow connection.
Warm against warm and cold against cold. All connections are
marked with labels.
If a dry box solution is specified, the supply air coils are divided
into two coils, one before and the other after the supply air filter.
The supply air coils must be connected as a serial connection.
First to the main supply air coil (after the filter) and then as a
serial connection to the preheater coil (the coil before the filter).
PIPE INSTALLATION
Connection to the pipe system should be carried out by the
plumbing contractor. Installation normally includes:
– Installation of necessary components for connecting
an external energy source, as set out in the documentation.
The necessary components vary depending on the design of
the object. Examples of external components are:
Expansion vessel
Heat exchanger and valves for supplementary
heating/cooling
External shut off valves
Connection for filling
Automatic air purging valve combined with a manual
air purging valve
Air purging valves for micro bubbles
Filter
Charging equipment
Water trap
Anti-freeze liquid
– Installation of pipes between the pump unit, the exhaust air
coil and the supply air coil.
– Connecting the supply air and exhaust air coil.
– Filling of liquid and air purging of the pump before commis-
sioning.
– Air purging the system.
– Shut of valves for each coil.
If the exchanger package is delivered from FläktGroup:
Mounting and installation of the exchanger package to the
ECONET
®
pump unit, and connection of the external energy
sources, including necessary valves, etc. Please see separate
instructions for more specific installation details.
The Econet
®
must be connected to the pipe system so that ex-
pansion forces or the pipe system’s own weight do not impose
a load on the liquid connections.
The liquid connections are provided with signs for the inlet and
outlet.
Preheater
coil
Supply air
Main supply
air coil
Director
of the flow
To
exhaust
coil
Make sure that all inspection doors can be opened after the
pipework is installed.
Important!
– Hold the pipe connections steady with a
pipe wrench when tightening external pipes.
– Use flax (hemp) and paste for sealing
the connections.
– Use sealings suited for anti-freeze liquids,
such as ethylene glycol mixtures.
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