FläktGroup EURT Econet Installation guide

Brand: FläktGroup

Model: EURT Econet

Type: Installation guide

FläktGroup EURT Econet is a liquid-coupled heat exchanger that offers efficient and reliable heat transfer solutions for various applications. Its advanced features and versatility make it an excellent choice for a wide range of projects.

The EURT Econet is designed to handle both heating and cooling operations, providing optimal temperature control for buildings and industrial processes. With its ability to connect multiple units in parallel, it can effortlessly meet the demands of large-scale projects, ensuring consistent and efficient heat transfer.

The device comes equipped with an intelligent control unit that precisely regulates the flow of liquid through the heat exchanger. This advanced control system optimizes performance, minimizes energy consumption, and ensures the desired temperature is achieved and maintained.

Fläkt Woods 3230 GB 03.01 1 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Liquid-coupled heat exchanger EURT – ECONET

ECONET includes the following:

1. Functional components with heat exchanger on the

supply air side and the exhaust air side.

2. Pump unit (not installed).

3. Control unit for liquid circuit (not installed).

4. Frequency changer for pump motor (not installed).

The control unit, frequency changer and pump unit are

supplied on a common pallet.

Control unit and frequency changer is installed as

shown in the Figure on the unit panel or on a wall. The

pump unit is intended for installation directly to the

heat exchanger on the supply air side.

1234

External energy

Fig. 1

Pump unit (2) consists of:

- Unit with pump, pipes, valves and connections for

sensors (pressure and temperature).

- Supplied components: - Thermometer (MT)

- Differential pressure sensor

with connection (GP41)

- Manometer with contact

function (GP40)

- Manometer (MP)

Control unit (3) consists of:

- Cabinet with installed equipment as shown in the

component list (see wiring diagram).

- Supplied components: - Temperature sensor

(GT41), (GT42)

- Actuator for (SV40)

Frequency converter (4):

+–

+P1

-P2

GP 41

(2)

(3)

(4)

Fig. 2

1) Sensor GT40,

external controller

Plug on delivery.

External controller

(Unit controller)

Liquid-coupled heat exchanger EURT – ECONET

Fläkt Woods 3230 GB 03.01 2 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Installation of pump unit

Size 20–53

The pump unit is designed to enable it to be installed

directly to the coil connection on the supply air side. It

is located on the bracket supplied. The bracket is instal-

led as shown in the hole template, using the screws sup-

plied.

A drip-tray, constructed on-site, is placed under the

pump unit.

Fig. 3

Size 60–84

The pump unit is placed on a frame constructed on-site.

A drip-tray, constructed on-site, is placed under the

pump unit.

Fig. 4

Installation of pump bracket, size 20–53

Drip-tray (not included)

Drip-tray and pump frame (not included)

Installation of pipe system

Connection to the pipe system must be performed by

a pipe installation contractor.

Installation includes:

- Installation of the pump bracket

- Connection between the TF and the FF side

- External connection

- Installation of all sensors (connection of pipes for

GP41)

- Expansion vessel

- Connection for charging

- Charging of liquid and purging

N.B.! Purging of the pump before starting.

- Water trap

N.B.! Pressure sensor GP41 is marked with P1 and P2.

Connect as shown in Figure 2. Valves to sensor GP41

must be closed and the overflow valve open when filling

the system.

The heat exchanger must be connected to the pipe system

so that expansion 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.

Important!

- Hold the pipe connections steady with a pipe wrench

when tightening external pipes.

- Use flax and paste for sealing the connections.

General tips

- For optimal heat recovery, a max. 30% frost protection

solution (water/ethylene glycol) is recommended

- When planning the pipe system, consideration must be

given to the possibility of flushing.

- Automatic air eliminator capable of dealing with

microbubbles (Spirovent or Flamcovent type).

- Separate pump with a non-return valve for filling the

system, e.g. a hand pump.

- Expansion vessel with a volume of at least 5 % of the

total system volume.

- Expansion vessel with 1.0 bar pre-compression, 6.0 bar

operating pressure and 4.5 bar opening pressure.

Fig. 5

1) 3)

1) Remove the bracket.

2) Refit with self-tapping screws in the fixing holes.

3) Move the pump shelf sideways so that the pipe fittings

match one another.

Size Right Left

20–22 180 150

30–31 330 300

32 300 150

40–41 433 283

42 433 288

50–53 600 455

Fläkt Woods 3230 GB 03.01 3 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Liquid-coupled heat exchanger EURT – ECONET

Pipe and component connection

Pump unit and components are connected as shown in

the diagram:

41 GP

– P2+ P1

Right-hand model

Left-hand model Marking of each pipe connection

+P1

– P2

+–

+P1

-P2

GP 41

STRZ–63

STRZ–64

STRZ–54

Värme/Kyla IN

Heating/Cooling IN

Lämmitys/Jäähdytys MENO

Frånluftsbatteri IN

Exhaust air coil IN

Poistoilmapatteri MENO

Tilluftsbatteri IN

Supply air coil IN

Tuloilmapatteri MENO

Frånluftsbatteri UT

Exhaust air coil OUT

Poistoilmapatteri PALUU

Tilluftsbatteri UT

Supply air coil OUT

Tuloilmapatteri PALUU

Värme/Kyla UT

Heating/Cooling OUT

Lämmitys/Jäähdytys PALUU

Fig. 6

Fig. 7

Fig. 8

1) Sensor GT40, outer controls

Plug on delivery

Outer controls

(Unit controls)

Fläkt Woods 3230 GB 03.01 4 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Liquid-coupled heat exchanger EURT – ECONET

The external coupling is dependent on whether one or

more units coupled in parallel are included.

Single unit (closed circuit)

The cut-off valve which connects the external liquid cir-

cuit in parallel with the pump circuit must be closed 1).

Three pipes can be used for supplementary cooling 2).

N.B.! Cut-off valves are installed on the external connec-

tion.

+–

GP 41

– P2 + P1

Multiple units (open circuit)

The cut-off valve which connects the external liquid cir-

cuit in parallel with the pump circuit must be open 1) .

Three pipes can be used for supplementary cooling 2).

N.B.! Cut-off valves are installed on the external connec-

tion.

+–

GP 41

– P2 + P1

Liquid charging and purging.

The purging, safety valve and drain connections are rou-

ted to the connection vessel next to the unit.

Fig. 9

Fig. 10

Fig. 11

Fläkt Woods 3230 GB 03.01 5 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Liquid-coupled heat exchanger EURT – ECONET

Condensation drainage

The heat exchangers are provided with a ø 32 drainage

connection for the connection of a water trap with a trap

depth of at least 100 mm. Use water trap EUAZ-08.

Water trap EUAZ-08

Fig. 14

Purging of heat exchanger

Manual purging for EURT.

Manual purging valve EUAZ-18

Manual

purging valve

EUAZ-18

Nipple EUAZ-20-1

Emptying

The heat exchanger cannot be emptied entirely, but the

liquid must be provided with a frost protection agent

when the risk of frost is present.

Fins

Any deformations in the fins is adjusted with fin comb

QLAZ-20.

Fig. 15

Fin comb QLAZ-20

Important!

Protective gloves must be worn when using the fin comb.

Fig. 12

Fig. 13

Fläkt Woods 3230 GB 03.01 6 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Liquid-coupled heat exchanger EURT – ECONET

Start-up

N.B.! Electrical connection of the pump must be carried

out.

1. Mix ordinary water and frost protection fluid to the

stipulated concentration. Then allow the mixture to

stand for at least 24 hours in the open mixing vessel

for air elimination.

2. Mark the system with signs indicating the flow, type

of frost protection and concentration.

3. Connect the coils, taking note of any marking in

respect of counter-flow connection.

4. Fill the system as soon as possible with the help of the

separate pump. The system should have a positive

pressure of 1.0 bar.

5. Pressure sensor (GP41). When charging with liquid ,

the by-pass valve must be open and the cut-off valves

must be closed.

6. Check for any leakage and reseal if necessary.

7. The circulation pump must be purged without

exception, using its own purging valve, before star-

ting!

8. Start the system’s circulation pump and purge the

system carefully. The pump is started via the manual

position on the frequency converter. Set the converter

to a relatively low frequency, ca 30 Hz.

9. Taking into service (GP41). Open the shut-off valves

and eliminate any air that is present. Shut the by-pass

valve.

10. Check the positive pressure of the system and fill up

if necessary. Check that no air is present in the char-

ging equipment.

11. Fill the water trap.

12. Recheck the system pressure after about a week.

Electrical and control installation

The electrical diagram for connection of the pump

motor, frequency converter and control unit for the

pump circuit is supplied with the control unit (in the

cabinet).

FläktGroup EURT Econet Installation guide

FläktGroup EURT Econet Installation guide

FläktGroup EURT Econet Installation guide

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