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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
1
FF
TF
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):
+–
+–
SV
40
GT
42
GT
40
GP
40
GT
41
MT
MT
MT
MP
FF
TF
+P1
-P2
+
+
1)
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.
H
Fig. 5
1) 3)
2)
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.
H
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:
MP
MT
GT
40
GT
41 GP
40
3
2
45
6
1
MT
MT
GT
42
SV
40
– P2+ P1
Right-hand model
Left-hand model Marking of each pipe connection
GP
40
GT
41
GT
42
SV
40
MT
MP
+P1
MT
GT
40
MT
– P2
2
3
6
54
1
+–
+–
SV
40
GT
42
GT
40
GP
40
GT
41
MT
MT
MP
FF
TF
+P1
-P2
+
+
1)
GP 41
STRZ–63
STRZ–64
STRZ–54
MT
5
6
4
3
2
1
Värme/Kyla IN
Heating/Cooling IN
Lämmitys/Jäähdytys MENO
1
Frånluftsbatteri IN
Exhaust air coil IN
Poistoilmapatteri MENO
4
Tilluftsbatteri IN
Supply air coil IN
Tuloilmapatteri MENO
2
Frånluftsbatteri UT
Exhaust air coil OUT
Poistoilmapatteri PALUU
5
Tilluftsbatteri UT
Supply air coil OUT
Tuloilmapatteri PALUU
3
Värme/Kyla UT
Heating/Cooling OUT
Lämmitys/Jäähdytys PALUU
6
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.
+–
+–
FF
TF
SV
40
GT
42
GT
41
GP
40
GP 41
MT
MT
MT
MP
– P2 + P1
2)
1)
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.
+–
+–
FF
TF
SV
40
GT
42
GT
41
GP
40
GP 41
MT
MT
MT
MP
– P2 + P1
2)
1)
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).
/