FläktGroup EU Econet Installation and Maintenance Manual

Brand: FläktGroup

Model: EU Econet

Type: Installation and Maintenance Manual

ECONET ®

Installation & Maintenance Manual

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 2 Subject to alteration.

Table of Contents

Safety rules, warnings ..........................................................................................................................3

ECONET®scope of delivery ................................................................................................................4

Assembly and installation ....................................................................................................................7

ECONET®control and electrical installation....................................................................................11

Maintenance instructions....................................................................................................................15

Functional description ........................................................................................................................16

Controller operation ............................................................................................................................18

Commissioning the unit......................................................................................................................19

Menu navigation ..................................................................................................................................23

Menu structure overview....................................................................................................................24

ECONET®parameters ........................................................................................................................27

ECONET®communication..................................................................................................................29

Frequency converter for ECONET®..................................................................................................37

Spare parts list ......................................................................................................................................44

Safety rules, warnings

Fläkt Woods

ECONET®

8170 GB 2010.05 3 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

Important: read this information before installing the equipment!

Personnel

Qualiﬁed personnel should carry out installation, operation and maintenance of the equipment. A quali-

ﬁed person is someone who is technically competent and familiar with all safety information and estab-

lished safety procedures, with the installation process, and with all the hazards involved.

Warnings

This equipment can endanger life through rotating machinery and electrical shocks. Failure to observe the

following will constitute an ELECTRICAL SHOCK HAZARD. This is a product of the restricted sales dis-

tribution class according to IEC 61800-3. In a domestic environment, this product may cause radio interfer-

ence, in which case the user may be required to take adequate measures.

• The equipment contains high-value capacitors, which take time to discharge after removal

of the mains supply.

• Before working on the equipment, ensure isolation of the mains supply. Wait for at least 3

minutes for the inverter to discharge to safe voltage levels.

• Never perform high-voltage resistance checks on the wiring without ﬁrst disconnecting the

inverter from the circuit being tested.

Possible risks

Under fault conditions, power loss or other, unintentional operating conditions, the equipment may not

operate as speciﬁed. In particular:

• The motor speed may not be controlled

• The direction of rotation of the motor may not be controlled

• The motor may be energised

• Heat recovery liquid is poisonous and harmful and may cause risk of injury if leaking

Environmental requirements for storage, transportation and use

If the Econet unit is not being installed immediately, store the unit in a well-ventilated place away from

high temperatures, humidity, dust or metal particles.

ENVIRONMENT INSTALLED, AND IN USE STORAGE AND TRANSPORTATION

Temperature Ambient temperature: 0°C - +40 °C -25°C - + 50°C

Intake air: -40°C - + 40 °C, intake air

temperature also subject to AHU dimensioning

Humidity Possible condensation on pipework and on the supply and exhaust air coil.

Water Econet equipment achieves min IP21.

Pressure Atmospheric pressure, max altitude 1000 m.

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 4 Subject to alteration.

ECONET®scope of delivery

System overview:

Single pump units or double pump units (1 or 2) illustrat-

ed in the ﬁgure are delivered separately from the AHU.

The pump unit is equipped with a stand for mounting on

a ﬂat ﬂoor separately from the air handling unit.

The pipework within the pump units (1 and 2) is protected

against rusting and insulated with Armaﬂex.

The sensors and components within the pump units (1)

are mounted and wired to the ECONET®control box.

The ECONET®control box is mounted on the pump unit

and pre-programmed with speciﬁc data for the project.

The frequency inverter/inverters is/are mounted on the

pump unit and wired to the pump/pumps and the

ECONET®control box.

The supply air coil and exhaust air coil (15, 16) are mount-

ed in the air handling unit.

18 19

16 17

1. Pump unit

2. Single-pump solution

3. Double-pump solution

4. Controller

5. a) Frequency inverter 1

b) Frequency inverter 2

6. Pressure gauge with contact function

7. Sensor, frost protection

8. Control valve

9. Sensor, ice protection

10. Differential pressure transmitter

11. Sensor, temperature

12. Shut-off valve

13. Shut-off valve

14. Exhaust air coil

15. Supply air coil

16. Non-return valve

17. Non-return valve

18. Shut-off valve

19. Shut-off valve

20. Shut-off valve

21. Shut-off valve

MP. Pressure gauge

MT. Thermometer

EU SIZE L D1 D2 H1 H2 H3 H4 H5 A1 A2 A3 PIPE SIZE

20-41 625 660 770 200 1600 630 680 730 100 175 175 DN 25-32

42-60 930 910 1020 200 1600 850 900 950 175 350 325 DN 50

62-80 1075 960 1070 200 1600 1040 1090 1140 225 250 350 DN 65-80

Fläkt Woods

ECONET®

8170 GB 2010.05 5 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

ECONET®scope of delivery

1= heating/cooling:in, 2=supply air coil:in, 3= supply air coil:out, 4=exhaust air coil:in, 5= exhaust air coil:out, 6=heating/cooling:out

Heat exchanger:

The ECONET®heat exchangers consist of a ﬁnned coil/coils

in the supply air unit and one in the exhaust air unit with

functions for heat/cooling recovery, heating as well as cooling

of the supply air. The coils are equipped with drip trays and

connections for air purging and drainage. A droplet elimina-

tor should be chosen if the air velocity through the coil is

high. The coils are manufactured from copper tube, which is

expanded against aluminium ﬁns. The header consists of

either copper or rust-protected steel. The maximum operating

pressure of the coils is 1.5 MPa, and the test pressure is 2 MPa.

Other material for the tubes, ﬁns and the framework can be

speciﬁed in the Acorn selection program.

Coils with hygiene ﬁns should be speciﬁed if cleanability

of the coils according to standards VD13803 and VD16022 is

required.

The supply and exhaust air coils are connected together

by a liquid circuit with the possibility to connect externally

supplied energy or heating/cooling.

(EURZ-05 ECONET®Exchanger Package, see separate

manual).

Pump unit:

The pump unit consists of a pump/pumps, pipes , valves,

sensors, frequency inverter/inverters and a controller for

ECONET®energy recovery.

The pipes in the pump unit are anti rust painted and insu-

lated with Armaﬂex. The pump/pumps consists of a base

and a pump head, between which the chamber stack and the

outer sleeve are secured by means of staybolts. The base and

pump head are made of cast iron, and all other wetted parts

are made of stainless steel, DIN 1.4301. All pumps are

equipped with a maintenance-free mechanical shaft seal of

the cartridge type. Max . operating pressure for the pump is

16bar / 160 mWC / 1.6 MPa.

The pump unit is designed to be mounted separately with

a stand for mounting on the ﬂoor. The pump unit is delivered

separately on a pallet.

The picture shows size EU:20-41

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 6 Subject to alteration.

Controller for heat recovery, frequency inverter and sensors:

The liquid ﬂow in the ECONET®circuit is controlled by

the frequency inverter/inverters for the pump/pumps

and by an ECONET®controller. The controller is

equipped with software that optimizes the circulation

ﬂow in the circuit for each operating condition. The soft-

ware in the controller includes protection and alarm

functions.

The controller is LonWorks or Modbus compatible.

Modbus communication is intrinsic to the controller, and

the LonWorks card for the controller can be chosen as an

accessory. The controller is mounted on the pump unit

and is programmed with input data for the speciﬁc pro-

ject. Cables are routed between the controller and the fre-

quency inverter.

The frequency inverter for the pump is mounted on the

pump unit, and cables are routed to the ECONET®con-

troller and the pump.

Necessary components such as pressure and temperature

sensors for the pump unit are included. Components

within the scope of the delivery are installed, and cables

are routed to the ECONET®controller and the frequency

inverter. The additional components/sensors needed for

the calculation of energy recovery efﬁciency are included

in the delivery, if speciﬁed, but mounting and cabling has

to be done on site (not included in Fläkt Woods delivery).

Packaging

Suitable packaging protects the ECONET®unit during

transport. This is fully environmentally compatible, and

should be taken for central disposal as a secondary raw

material.

Commissioning:

In order to guarantee safe and optional functionality for

ECONET®heat recovery, commissioning of each

ECONET®system shall be carried out by accredited and

trained personnel. Commissioning of ECONET®can be

ordered and carried out via the Fläkt Woods sales

organisation, see order code.

ECONET®scope of delivery

1= heating/cooling:in, 2=supply air coil:in, 3= supply air coil:out, 4=exhaust air coil:in, 5= exhaust air coil:out, 6=heating/cooling:out

EU SIZE L L2 D1 D2 H1 H2 H3 H4 H5 A1 A2 A3 PIPE SIZE

20-41 625 850 970 1085 200 1600 940 990 1040 250 175 325 DN 25-32

42-60 930 1250 1365 200 1600 1250 1300 1350 350 350 500 DN 50

62-84 1075 1660 1775 200 1600 1240 1290 1340 600 250 725 DN 65-80

Fläkt Woods

ECONET®

8170 GB 2010.05 7 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

Unpacking

Inspection of delivered equipment

– Check for signs of transit damage.

– Check that the product codes on the rating labels

conform to your requirement.

– Check the delivered components against the bill of

material.

– The code for the pump unit (STYZ-74-…) can be

found on the ECONET®control box.

Installation instruction:

The following must be carried out on site by the

plumbing/automation and electrical contractors.

– Assembly of the pump unit, installation of pipes from

the exhaust air coil and connection to the exhaust air

and supply air coils.

– Installation of necessary components for connecting

an external energy source, as set out in the documen-

tation.

– Filling and air purging of system.

– Power supply to the ECONET®controller and

frequency inverter.

–Connection between the ECONET®controller and the

controller for the AHU.

– Wiring between the air ﬂow sensor (supply air) and

the ECONET®controller.

Option:

– Mounting and wiring of the delivered sensors needed

for energy recovery calculation, GT00, GT10, GT20,

GT30, GT21, air ﬂow sensor (exhaust air).

– Commissioning of the ECONET®system.

– Controls for AHU, SV 30, SV 50, etz.

ECONET®assembly and installation

(EURZ-05 ECONET®Exchanger Package, see separate manual).

= Pipe connection: ECONET®

= Pipe connection: Exchanger package

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 8 Subject to alteration.

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 connec-

tion. Warm against warm and cold against cold. All con-

nections 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 documen-

tation. 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 and the

exhaust air coil

– Connecting the supply air and exhaust air coil

– Filling of liquid and air purging of the pump before

commissioning

– Air purging the system

– Shut of valves for each coil

If the exchanger package is delivered from Fläkt

Woods:

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 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 (hemp) and paste for sealing the connections.

– Use sealings suited for anti-freeze liquids, such as

ethylene glycol mixtures.

Preheater

coil

Supply air

Main supply

air coil

Director

of the flow

exhaust

coil

Make sure that all inspection doors can be opened after the

pipework is installed.

Fläkt Woods

ECONET®

8170 GB 2010.05 9 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

General advice

Failure to observe general advice and installation require-

ments can lead to the risk of damage.

Flushing the pipe system:

– ECONET®pump units are cleaned and ﬂushed at the

factory. When ﬂushing the remainder of the system, we

recommend that the pump unit is disconnected and that

the P40 pump is not used during ﬂushing.

It is extremely important to remove all the ﬂush-

ing/cleaning ﬂuid from the system before ﬁlling with

anti freeze as a chemical reaction can occur between the

cleaning and anti-freeze liquids. As the coils cannot be

emptied completely, they must not be exposed to the

cold without anti-freeze.

Filling:

– For optimal heat recovery, we recommend an approximate

25-35% ethylene glycol mixture. Max mixture for the pump

is a 40% ethylene glycol mixture. The P40 pump should

not be used when ﬁlling the system.

Use a separate ﬁlling system, e.g. a separate pump with a

non-return valve for ﬁlling the system, e.g. a hand pump.

– Fill until a static pressure of 1-1.5 bar is obtained on the suc-

tion side of the pump to avoid the risk of pump cavitation.

– Uses premixed anti-freeze liquid, type ethylene glycol/

water mixture. Prevent exposure to oxygen. When using

concentrated ethylene glycol, it must be mixed with dis-

tilled water. The liquid must be mixed 24 hours in advance,

so that the mixture will be free of micro bubbles. When ﬁll-

ing with premixed liquid from a tanker lorry, ask for a

ﬂushing certiﬁcate.

– Mark the system with a label showing the actual ﬂow, type

of anti-freeze liquid, and concentration.

– Check for, and seal any leaks.

–Check that the anti-freeze liquid used has sufﬁcient protec-

tion against corrosion, anti fouling and biological growth.

Follow the instructions of the anti-freeze liquid manufac-

turer.

Air purging:

To get rid of all air in the system takes time, but is vital for the

performance. Use automatic air purge valves combined with

manual air purge valves. Prevent the risk of contamination

blocking the sealing and jeopardizing the shut-off function of

the automatic air purge valve. Install a ﬁlter if there is a contin-

uous problem with contamination. When the system is free of

all air, make sure that all automatic air eliminators are OK and

all manual valves are closed.

Open and close all valves a couple of times. Close the

by-pass valve and start the ECONET®pump. The pump should

be run manually via the frequency inverter at maximum 30 Hz.

Under no circumstances must the pump be allowed to run

dry, due to the risk of damage to the seals. Purge the air from

the pump with its own purging valve. Make sure that the sys-

tem pressure is maintained at 1–1.5 bar. Reﬁll the system con-

tinuously as the pressure decreases. If the pressure drops below

0.5 bar, there will be an A-type alarm from the controller.

Miscellaneous:

– Under no circumstances may the P40 pump be run dry.

This is because the pump will be damaged by the air,

resulting in leakage.

– The coils for supplementary heating/cooling have to be

installed with separate shut-off valves. The total pressure

drop for the heat exchangers on the secondary side must

not exceed 40 kPa at the maximum liquid ﬂow for a closed

heat recovery circuit. A higher value should be taken into

account when dimensioning the system.

The purging, safety valve and drain connections must be

routed to the connection vessel next to the unit.

– Use air purge valves that can handle micro bubbles (type

Spirovent or Flamcovent).

– The vessel must be installed on the suction side of the

pump (between the pump and the plate heat exchangers

for supplementary energy) with a volume of at least 5 % of

the total system volume and with 1.0 bar pre-pressure, 4.5

bar opening pressure.

– If the risk of cavitation is present on the suction side of the

pump, it is advisible to install underpressure air elimina-

tors.

ECONET®assembly and installation

The purging, safety valve and drain connections are

routed to the connection vessel next to the unit.

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 10 Subject to alteration.

ECONET®control and electrical installation

Electrical connection and recommended fuses

Both the cabinet and the inverter must be connected via

disconnecting switches.

Main power shall be 3x400 VAC. An electrician shall

dimension the fuses for the pump according to the table

below, and according to the site circumstances.

Recommended minimum fuse for the cabinet is 10 A.

Inverter supply voltage.

1.) Speciﬁc instructions for the frequency converter elec-

trical installation are contained in the "Frequency con-

verter for ECONET®3.0" manual, which is also includ-

ed for convenience in this document as the Chapter

"Frequency converter for Econet".

2.) Connect the power supply cable, 3x400 VAC, to termi-

nals U1, V1, W1 and protective earth (PE). Observe

proper grounding and shielding methods as described

in the converter product manual.

3.) Reﬁt the frequency converter cover.

WARNING!

Ensure that all wiring is electrically insulated and cannot be

made “live” unintentionally by other personnel.

AHU SiZE PUMP OUTPUT MAX. CURRENT

20 0.55 kW 1.44 A

21,22,30 0.7 kW 1.9 A

31 1.1 kW 2.55 A

32,40 1.5 kW 3.15 A

33,41,42,50,51 2.2 kW 4.45 A

44 3.0 kW 6.35 A

52,60,53,62 4.0 kW 8.0 A

71,64,80,73,82 5.5 kW 11.2 A

84 7.5 kW 15.2 A

Table 1 Single pump max. currents. Pump data due to the size of the

air-handling unit. The fuse size depends on site-speciﬁc circumstances

and must be dimensioned by an electrician.

AHU SiZE PUMP OUTPUT MAX. CURRENT

20,21 2 x 0.55 kW 2 x 1.44 A

22,30,31 2 x 0.7 kW 2 x 1.9 A

32,40,33 2 x 1.1 kW 2 x 2.55 A

41,42,50 2 x 1.5 kW 2 x 3.15 A

51,44,52,60,53,62 2 x 2.2 kW 2 x 4.45 A

71,64,80,73,82 2 x 4 kW 2 x 8 A

84 2 x 5.5 kW 2 x 11.2 A

Table 2 Twin pump max. currents. Pump data due to the size of the

air-handling unit. The fuse size depends on site-speciﬁc circumstances

and must be dimensioned by an electrician.

Fläkt Woods

ECONET®

8170 GB 2010.05 11 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

Control cabinet installation

Connect the power supply cable to 230 VAC terminals

Q01: L1, N, and PE (protective earth).

AHU controller signals.

Connect the AHU controller signals to terminals accord-

ing to the illustration below. Note that the B-type alarm

and pump 2 running indication (P40.2.I) are relevant

only in twin-pump versions.

In the event that some signals measured or calculated by

the Econet controller are relayed as voltage signals to an

external controller, connect the cable according to the fol-

lowing picture. Three temperature measurements (GTxx)

and one efﬁciency signal (eff) are available for relaying.

ECONET®control and electrical installation

0-10VDC

Cooling

P40.1.I Indication

A-type alarm

Start

Cooling recovery

P40.2.1 Indication

B-type alarm

Main supply 230 Volt 50Hz Max 10A L

MAIN

Controlsignalground com GO

0-10V Signal Y

C NO

Common

P40.1.I Indication

Common

A-type alarm

Controlsignalground com GO

C NO

CNO

Common

P40.2.I Indication

Common

A-type alarm

X11:6

X11:5

X7:1

X7:2

X7:3

X7:4

X8:1

X8:2

X5:5

X5:4

X6:2

X6:1

X5:2

X5:1

X6:5

X6:4

-RC1

Eff

GT40

com

Optional

-RC1

X10:1

X10:2

X10:4

X10:5

P40.1.I

P40.2.I

A-Larm

B-Larm

GT41

GT42

com

-X1

Optional

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 12 Subject to alteration.

Sensor cable connections

Supply Airﬂow sensor signal

The supply airﬂow signal (GF10) must be connected in all

product versions before commissioning the unit. The

signal transducer is part of the air handling unit delivery.

Connect the airﬂow sensor according to the illustration

below.

Frost building GT41

Outdoor temp GT00

Exhaust air temp

GT20

Heating/cooling

liquid temp GT30

Supply air temp.GT10

Extract air temp.GT21

X11:13

X11:14

X12:1

X12:2

X12:3

X12:4

X12:5

X12:6

X12:7

X12:8

X12:9

X12:10

X12:11

X12:12

X12:13

X12:14

Air ﬂow sensor,

exhaust air

GF20

OUT

Air ﬂow sensor,

supply air

GF10

–X1

Exhaust Airﬂow sensor signal

The supply airﬂow signal (GF20) must be connected in the

product version with heat recovery efﬁciency measure-

ment. Connect the airﬂow sensor according to the

illustration above.

Temperature sensor content of delivery and installation

The temperature sensors are included, and their location is

apparent from the list of components and the ﬂow dia-

gram in the documentation.

All temperature sensors are connected in the electrical

cabinet via terminals. All the air temperature sensors are

without cables. All the sensors should be ﬁtted in the air

duct, approximately 1.5 m from any duct heaters, to give

stable measurement values.

Water temp. at the pump GT40

Ice building GT42

–RC1

ECONET®control and electrical installation

OUT

Fläkt Woods

ECONET®

8170 GB 2010.05 13 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

Sensor GT40 for liquid temperature at the pump P40

The sensor is installed at the factory.

Frost protection temperature sensor GT41 and Ice

protection temperature sensor GT42

The sensors have been installed at the factory.

Outdoor temperature sensor GT00

An outdoor temperature sensor is needed in the product

version with efﬁciency calculation. The temperature sen-

sor is a part of the Econet delivery, but it must be

installed and connected before commissioning. Connect

the temperature sensor according to the illustration on

the previous page.

Supply air temperature sensor GT10

A supply air temperature sensor is required in product

version with efﬁciency calculation. The temperature sen-

sor is a part of the Econet delivery, but it must be

installed and connected before commissioning. Connect

the temperature sensor according to the illustration on

the previous page.

Exhaust air temperature sensor GT20

An exhaust air temperature sensor s required in the

product version with efﬁciency calculation. The tempera-

ture sensor is a part of the Econet delivery, but it must be

installed and connected before commissioning. Connect

the temperature sensor according to the illustration on

the previous page.

Extract air temperature sensor GT21

An extract air temperature sensor is required in the prod-

uct version with efﬁciency calculation. The temperature

sensor is a part of the Econet delivery, but it must be

installed and connected before commissioning. Connect

the temperature sensor according to the illustration on

the previous page.

Supply liquid temperature sensor GT30

The temperature sensor for the liquid arriving at the

Econet pump group shall be installed either on the pri-

mary side of the heat exchanger or in the incoming pipe

to the circuit. The sensor is required in the product ver-

sion with efﬁciency calculation for monitoring reasons.

The temperature sensor is a part of the Econet delivery,

but it must be installed and connected before commis-

sioning. Connect the temperature sensor according to the

illustration on the previous page

ECONET®control and electrical installation

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 14 Subject to alteration.

General maintenance instructions

The ECONET®unit does not require regular maintenance,

other than observing the maintenance instructions provid-

ed by the anti-freeze liquid manufacturer. On the other

hand, we recommend that regular performance checks are

carried out to ensure that the unit operates as it should.

Check and pay special attention to the following:

- abnormal noise and vibrations, if any

- corrosion on piping and brazed pipe joints, if any

- loose pipe clamps, if any

Cleaning the standard ECONET®coils

Even an effective air ﬁlter cannot remove all the dust

from the air. The coating of dust on heating surfaces

obstructs the air ﬂow and gives poorer heat transfer. The

coils must be kept clean, which is best performed with

one of the following alternatives or combinations of

these.

1. Blowing clean with compressed air

2. Blowing clean with steam

3. Washing or rinsing with water. In

the case of heating surfaces that

are coated with grease, an appro-

priate detergent should be

added.

4. Vacuum cleaning

After cleaning, all the fallen dust

should be removed before starting

the fan.

The drip trays for the coils should be cleaned as

appropriate.

Also ensure thet the water trap is cleaned and ﬁlled

with water.

Cleanable coils for hygiene applications

All ECONET®coils with hygiene ﬁns are fully cleanable

according to the standards VDI3803 and VDI6022. This

means that the coil can be cleaned with a high-pressure

water system right through the core. The cleaning nozzle

used for coils with a ﬁn pitch of 2.0-2.5 mm and deeper

than six tubes is THD Power Clean manufactured by

TECHNISCHER HYGIENE DIENST GMBH (E-mail:

[email protected], web: www.thd.info). If the coil is six tubes

deep or less, an ordinary nozzle can

be used.

1. Make sure that no sensitive

equipment, either inside or out-

side the unit, can be harmed by

the water. Be extra careful not to

damage the ﬁlter. If the unit has

an empty section (EUTB), use

the special drip plate to protect the rest of the unit.

2. Clean the coil with a high-pressure cleaner. If the coil

is deeper than six tubes, a THD Power Clean is

needed to ensure a full cleanability.

3. Point the nozzle at a 45-degree angle to have a free

passage for the water jet through the coil. Make sure

that the water penetrates the coil.

4. Remove all dirt.

5. Dry all surrounding parts in the unit.

Anti-freeze liquid

Follow the instructions from the anti-freeze liquid manu-

facturer regarding controls, maintenance, ﬂushing and

intervals for ﬁlling with fresh liquid, etc.

Maintenance instructions

WARNING!

Avoid ﬂushing with water near the electrical connections of

the inverter and cabinet, since water could then seep into

them and may cause a short circuit.

Task Interval, each year

Liquid status Check the freezing point of the frost protection ﬂuid and follow the instructions from the anti-freeze liquid

manufacturer, controls of frost protection/quality, purity, colour, etc.

Check the system pressure and top up with ethylene glycol mixture if necessary.

Check the liquid ﬂow against the balancing report.

Coils Check that the ﬁnned surfaces of the coils are not dirty, and clean if necessary.

Water trap Check that water is present in the water trap for the exhaust air and supply air coils.

Air purging Check frequently initially. An annual check is sufﬁcient after the ﬁrst year.

Shut off the pump and wait a couple of hours to make sure that the air bubbles have risen to the highest points in the

system, where the air-valves should be present. Open/close all valves in the system so that all trapped air can be removed.

Valve checking Shut down the system and open/close every valve to make sure it has a smooth operation.

Pump seals Check the seals, and replace them if leakage is excessive.

Fläkt Woods

ECONET®

8170 GB 2010.05 15 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

ECONET®functional description

Function

The heat recovery function is controlled by the ECONET®

control box. The speciﬁc functions for the AHU must be

controlled by a separate controller (not included in the

ECONET®delivery). The functions below describe the inter-

nal heat recovery function for ECONET®. The process and

instrumentation diagram for ECONET®is shown below.

Air handling unit not running:

When the temperature GT41 is below +16°C, the pump

will start to operate at a constant low speed. When the

liquid temperature GT41 is higher than +17°C, the pump

P40 will stop.

Start of the air handling unit:

When ECONET®receives a start-up signal, the pump P40

starts to operate at a constant high speed after 3 minutes.

After that the pump goes to optimal sequence.

Main function:

ECONET®is a part of the sequence to control the supply

air temperature to its set point.

Main functions of ECONET®control box

(control sequence):

• Cooling recovery, On/Off signal

The pump P40 and frequency converter FO40 regulate

the liquid ﬂow to an optimal value for cooling recovery,

and valve SV40 by-pass will then close. NOTE. The heat

recovery signal must be 0%

• Supplementary cooling, On/Off signal

The pump P40 and frequency converter FO40 regulate

the liquid ﬂow to the optimal value for supplementary

cooling. SV40 will open. NOTE. The heat recovery

signal must be 0%

• Heat recovery, 0...100%, 0..10 V signal

The pump P40 starts at minimum speed, the valve SV40

moves from open to closed, pump P40 goes from mini-

mum speed to optimal speed (optimal heat recovery

liquid ﬂow).

• See below for twin-pump function and other support

functions, further down.

Frost and ice protection

• Frost protection: Protection against frost formation on

the exhaust air coil (air side).

The liquid temperature at GT41 is prevented from drop-

ping below the temperaure (approx.-3°C) for frost protec-

tion by regulating the liquid ﬂow with the pump P40 and

FO40 from optimal liquid ﬂow to an increased liquid ﬂow.

10 GF

40.2

P40.2

P40.1

40.1

Exhaust coil

Exhaust air

Supply coil

Supply air

Supplementary

energy

Twin pump

*GT30 alternatively

on the supply pipe to

the heat/cooling

exchanger

ECONET, extended delivery:

Standard/normal: GT40, GT41, GT42, SV40, GP41, GF10,

FO40.1, P40.1

Double pump: FO40.2, P40.2

Efﬁciency calculation: GT 00, GT10, GT20, GT21, GT30, GF20

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 16 Subject to alteration.

ECONET®functional description

• Risk of frost formation:

When the liquid temperature GT41 falls below the

A alarm value (approx. -10°C), the A-type alarm is

given.

• Ice protection: Protection against ice formation in the

heat exchangers for supplementary heating/cooling

(water side).

The liquid temperature at GT42 is prevented from drop-

ping below the temperature (approx. 6°C) for ice protec-

tion by regulating the liquid ﬂow with the pump P40 and

FO40 from optimal liquid ﬂow to an increased liquid ﬂow.

• Risk of ice formation:

When the liquid temperature GT42 falls below the

A alarm value (approx. 2°C), the A-type alarm is given.

Alarms

• A-type alarms:

– Risk of frost formation, GT41 ( - 10°C)

– Risk of ice formation, GT42 (+ 2°C)

– Pump indication not the same as set value

(conﬂict alarm, should run but does not, or should not

run but does)

– Low pressure in ECONET®liquid circuit

– Internal hardware fault (heat recovery, GF10, GT41, GT42)

• B-type alarms:

– One of the twin pumps has stopped when it should run

Support functions

• Redundant pumps

The ECONET®product version with redundant pumps

has two pumps (P40.1 and P40.2) and frequency convert-

ers (FO40.1 and FO40.2) running in parallel. They are

started and controlled in parallel. In the event of one of

the pumps failing to run, the other pump continues to

run automatically. Failure of one pump is indicated with

the B-type alarm. The ECONET®unit continues running

according to control signals with one pump only.

• Energy and Power calculation

If energy calculation is speciﬁed, the ECONET®con-

troller calculates an estimate of momentary power for

– Recovered power

– Additional power and

– Power to the supply air

The same momentary powers are accumulated to

energy, and the following energy consumption values

are calculated:

– Recovered heating energy

– Recovered cooling energy

– Additional heating energy

– Additional cooling energy

– Heating energy to supply air

– Cooling energy to supply air

Calculated power and energy values are shown locally

or via the communication interface. The calculated

values are estimates only and are not calibrated. They

can be used for general monitoring, but not as the basis

for functions such as invoicing, for example.

• Efﬁciency calculation

If necessary, additional measurement sensors (GT00,

GT10, GT20, GT21) are installed and connected. The

ECONET®controller then calculates the heat recovery

efﬁciencies. The following efﬁciencies are calculated:

– Supply air temperature heat recovery efﬁciency

– Exhaust air temperature heat recovery efﬁciency

– Momentary power heat recovery efﬁciency

Due to measurement inaccuracies and small tempera-

ture differences the calculated efﬁciency values may

exceed 100%.

• Monitoring

Two additional sensors (GF20, GT30) are used for

diagnosing the operation of the ECONET®unit.

– Exhaust airﬂow sensor: In order to evaluate heat

recovery efﬁciency, the supply and exhaust ﬂows

must be equal

– Additional heating/cooling liquid temperature:

The temperature level must be high enough to

provide necessary additional heating/cooling.

Fläkt Woods

ECONET®

8170 GB 2010.05 17 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

Operation

The unit is operated by external automation equipment

such as the building automation system or the AHU

main controller. The current status can be read from the

“home” display that is always accessible by pressing

home button.

Operating information

The full status of the unit is presented in the OP informa-

tion menu. Here you can read the set points, actual val-

ues, control signals, status of pumps, output signals to

valves and frequency converters, etc. Use the row selector

buttons (6) to scroll between values.

Alarms

Alarms are indicated by the red ﬂashing LED on the

alarm button (5). Press the alarm button once to access the

alarm list. Alarms are presented in clear text in the alarm

list. Use the row selector buttons (6) to scroll through the

alarm list.

Alarm acknowledgement

Press the alarm button once to acknowledge an alarm. The

alarm lamp is then lit. Press the alarm button once again to

reset the alarm. The alarm lamp should then go out. Active

alarms cannot be acknowledged. If the alarm remains, the

alarm lamp is continuously lit.

Controller operation

1. LCD display

Display of the values and settings.

2. Home button

Return to the start page

irrespective of which menu you are in.

3. Return button

Move one menu upwards in

the menu tree.

4. Start/Stop button

(no function in Econet®)

5. Alarm button

Display of the alarm list and

acknowledged alarms.

6. Row selector buttons

Navigation between menus and

between parameters in menus.

7. Setting buttons

Setting of values (+/-) and horizontal

movement of the cursor on the

row where the cursor is positioned.

8. ENTER button

Conﬁrm changes to values and

menu selection.

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 18 Subject to alteration.

When taking the ECONET®pump unit into use, and when

starting the unit for the ﬁrst time, the user is guided

through a set of selections to conﬁgure the controller so

that it will operate in the desired manner. The conﬁgura-

tion of the controller requires some information of the

operation panel sequences. If you are not familiar with

the operator panel, please refer to sections “Controller

operation” and “Menu navigation” in this document. The

display examples may not be exact copies of the corre-

sponding displays, since minor software updates may take

place more frequently than manual updates. The examples

are sufﬁciently valid for following this manual.

Initial display

Select the language ﬁrst, and then proceed to Commission-

ing selections

MENU SPRÅKVAL / LANGUAGE

And then

MENU COMMISSIONING

Commissioning

The following selections must be checked at the time of

commissioning. Without conﬁrming the selections, it will

not be possible to start the unit. The selections are set to

default values and, depending on the ECONET®version,

need to be different from defaults, in which case the

selection must be changed to correspond to the required

operation. These selections and cabling connections can-

not always be made during the manufacturing process,

and it is therefore the responsibility of the commissioning

staff to check the correctness of the delivered parts and

their connections.

In the event that a parameter value requires to be set, the

possible range is indicated as follows: In the text below,

the available choises are shown as bracketed lists where

different alternative options are separated with a vertical

line [ALT1 | ALT2 | ALTN].In case a parameter

value shall be set the possible range is shown as in the

following [LOWER_RANGE .. UPPER_RANGE].

Pump type

Two kinds of pump are used with ECONET®.As default,

the unit is delivered with a single pump. Higher reliability

ids required in certain applications, and ECONET can be

ordered as a twin-pump version in these cases. The twin-

pump version consists of an additional redundant pump

and frequency converted for normal delivery.

PUMP TYPE [ NORMAL | REDUNDANT ]

Valve control signal type

In certain applications, the valve actuator can be of a type

that is controlled with 0..10V control. Usually, and as

default, the valve is controlled with a 3-point valve actuator.

VALVE TYPE [ 3-POINT | ANALOG ]

Sensor for exhaust ﬂow

In the case of the product version with heat recovery efﬁ-

ciency measurement, the exhaust air ﬂow needs to be

measured for monitoring reasons. Check that the sensor

has been installed and connected to the controller. As

default, the unit is not equipped with this sensor.

SENSOR EXH.FLOW [ YES | NO ]

Sensor for outdoor air temperature installed

In the case of product version with heat recovery efﬁcien-

cy measurement, the outdoor air temperature to the unit

needs to be measured for calculating the efﬁciencies.

Check that the sensor has been installed and connected

to the controller. As default, the unit is not equipped with

this sensor.

Commissioning the unit

01.01.2007 12:02

ECONET v3.0A

Språkval / Language

Svenska

Driftsättning

Återv.ener 0%

Fläkt Woods

ECONET®

8170 GB 2010.05 19 Subject to alteration.

INSTALLATION & MAINTENANCE MANUAL

Sensor for supply air temperature installed

In the case of product version with heat recovery efﬁcien-

cy measurement, the supply air temperature from the

supply air coil needs to be measured for calculating the

efﬁciencies. Check that the sensor has been installed and

connected to the controller. As default, the unit is not

equipped with this sensor.

Sensor for exhaust air temperature installed

In the case of the product version with heat recovery efﬁ-

ciency measurement, the exhaust air temperature to the

recovery coil needs to be measured for calculating of the

efﬁciencies. Check that the sensor has been installed and

connected to the controller. As default the unit is not

equipped with this sensor.

Sensor for extract air temperature installed

In the case of the product version with heat recovery efﬁ-

ciency measurement, the extract air temperature from the

recovery coil needs to be measured for calculating the

efﬁciencies. Check that the sensor has been installed and

connected to the controller. As default, the unit is not

equipped with this sensor.

Heating and cooling supply water temperature sensor

In the case of the product version with heat recovery efﬁ-

ciency measurement, the supply liquid temperature

needs to be measured for monitoring reasons. Check that

the sensor has been installed and connected to the con-

troller. As default, the unit is not equipped with this sensor.

Continue

After checking the mounting and connections of the sen-

sors and ﬁeld equipment, as described above, some sen-

sors need to be conﬁgured for use. Conﬁrm to continue.

CONTINUE

Conﬁgure air ﬂow

The air ﬂow sensor information is usually not known for

sure at the time of ordering the ECONET®unit. These set-

tings must be set during commissioning.

CONFIG. AIR FLOW

The air ﬂow transmitter (sensor) type can be either pressure

linear or ﬂow linear. Select the parameter according to the

type of transmitter type. Both the supply and the exhaust

air ﬂow sensors must be of the same transmitter type.

PRESSURE SENSOR [FLOW LINEAR |

PRESSURE LINEAR ]

The transmitter pressure range must be set according to

the transmitter in use. The range can be set up in steps of

10 Pa. Both the supply and the exhaust air ﬂow sensors

must have the same pressure range.

PRESSURE RANGE [0..8000 PA]

The controller needs to have the so called k-factor of the

airﬂow sensing element. The factor can be found on the

fan module product label.

K-FACTOR SUPPLY [0..50 ]

K-FACTOR EXHAUST [0..50 ]

CONTINUE

Conﬁgure liquid ﬂow

The liquid ﬂow transmitter/sensor information is usual-

ly known at the time of ordering the ECONET®unit.

These settings must be checked during commissioning.

The parameter values can be found from the commis-

sioning protocol. The liquid ﬂow settings are shown here

as an example. The commissioning sequence proceeds

through all the preset parameter values and asks for con-

ﬁrmation from the person who commissions the unit.

CONFIG. LIQUID FLOW

Commissioning the unit

Conﬁg. Liquid ﬂow

Pressure range 400 kPa

Pressure lower 50 kPa

Flow lower 0.5 l/s

Pressure upper 250 kPa

Flow upper 2.0 l/s

Fläkt Woods

ECONET®INSTALLATION & MAINTENANCE MANUAL

8170 GB 2010.05 20 Subject to alteration.

Commissioning the unit

CONTINUE

Temperature and efﬁciency signal relay as analog

output to external controller

OUTPUTS

In the ECONET®controller, there are four analog outputs

that can be used for relaying measured temperature or

efﬁciency values to some external controller.

The temperature values are scaled so that

• 0 V output signal corresponds to –50 °C and

• 10 V output signal corresponds to 50 °C.

• In practice, this means that a change of one volt

represents a change of 10 °C.

The efﬁciency signals are scaled so that

• 0 V output signal corresponds to 0 % efﬁciency

• 10 V output signal corresponds to 100 % efﬁciency

TEMP.X OUTPUT [NONE | EXT.TEMP | EXH. TEMP |

SUPPLYTEMP | OUTTEMP | ICE | FROST | PUMP ]

The abbreviations correspond to the following sensors

• Outtemp: Outdoor air temperature, GT00

• Supplytemp: Supply air temperature, GT10

• Exh. Temp : Exhaust air temperature, GT20

• Ext. temp: Extract air temperature Gt21

• Pump: Liquid temperature at the pump P40, GT40

• Frost: Liquid temperature at frost protection sensor

temperature, GT41

• Ice: Liquid temperature at ice protection sensor

temperature, GT42

EFFICIENCY TYPE [ EXTRACT | ECONET ]

Extract efﬁciency is calculated using the formula:

ECONET®efﬁciency is calculated using the formula

below. The formula takes the additional energy that is

fed into the heat recovery circuit into account, and in so

doing reduces the efﬁciency to a value that is comparable

to the commonly used supply air temperature heat

recovery efﬁciency.

In both the above equations, when the nominator is near

zero, small errors in temperature measurement may

already cause a large deviation in the result of the equa-

tion. Therefore, there is a parameter that can be set to dis-

able the calculation if the nominator is smaller than the

parameter value. It is recommended (as default) that efﬁ-

ciencies are not calculated in the event that any term in the

nominator is less than 5 °C.

Other preset settings and preinstalled sensors

Parameters

All the relevant parameters have been downloaded at the

factory. Since the parameters are essential for the correct

function and performance, it is a good and necessary

practice to go through the preset parameters and to com-

pare them to values for a particular unit. The commis-

sioning sequence shows all the parameter values and

requires conﬁrmation in the same manner as in the Con-

ﬁgure liquid ﬂow sub-chapter above.

The correct parameter values can be from “commission-

ing protocol” that is delivered with the unit. The parame-

ter settings can be entered again after initial commission-

ing with the following sequence.

MENU CONFIGURATION OPERATION SETTINGS

Sensors and actuators

After setting the selections, check that all the signals,

including both pre-installed and site-installed sensors,

show a reasonable value from OP Information displays.

GT21 – GT20

GT00 – GT20

η =

GT10 – GT00

GT20 – GT00

η=GT42 – GT41

GT40 – GT41

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FläktGroup EU Econet Installation and Maintenance Manual

FläktGroup EU Econet Installation and Maintenance Manual

FläktGroup EU Econet Installation and Maintenance Manual

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